hh.ru.txt

SweedPos [ ex WALLI IT, INC ] [ U.S.-Based Start-Up ]
Front-End Tech Lead | Team Lead | Lead Engineer

⬤ [ 7 YEARS 4 MONTHS ] [ JULY 2017 ➜ OCTOBER 2024 ] [ FULL-TIME: 40-60 HOURS PER WEEK | LONG-TERM CONTRACT | HYBRID ]
⬤ [ COMPANY SPECIFICS, PROFILE, AND TECHNOLOGY STACK ]:
― Turnkey product development in the pharmaceutical distribution sector for retail.
― Start-up [ 2017/2018 ] ➜ An established and successful company [ 2023/PT ].
― Frontend: React & TypeScript; Backend: .NET & Microsoft SQL Server [ Java was partly used ].

⬤ [ PROJECT #24 ] [ JULY 2017 ➜ OCTOBER 2024 ]
➤ [ [ B2B ][ Front-End Framework ] Corporate Front-End Framework ]:
― Goal: Build a robust front-end platform completely from the ground up.
― Result: Successfully launched for commercial use [ 2018 ➜ PT ].
➤ [ Front-End Tech Lead | Team Lead Role [ in a team of 2 to 6 front-end developers at various times ] ]:
― 80% coding, 20% other tasks.
― Designing the architecture, developing core modules and components.
― Developing a robust UI Kit with modular and reusable components.
― Integrating external JavaScript out-of-the-box solutions.
― Creating a unified, Webpack-based build system for all company web applications.
― Regularly updating libraries and ensuring up-to-date dependencies.
― Collaborating with the product teams to develop optimal technical solutions.
― Ensuring and monitoring code quality.
― Ensuring compliance with SOC 1/2.
― Unit testing and code review.
― Documenting the architecture.
➤ [ Key Achievements and Personal Contributions ]:
― Creator and sole developer during the launch phase into the production environment.
― Foundational platform for all 5 company web applications, as of July 2024.
― First in my career and immediately successful: an experience using the React ecosystem as a corporate front-end platform.
― Smooth scaling achieved without the need for major refactoring – thanks to a multi-layer Clean Architecture that adheres to SOLID principles.
― The framework's core is cross-platform, enabling React and Vue components to work seamlessly within the same ecosystem.
― Comprehensive unit test coverage.
― Numerous complex UI components.
― Dozens of indispensable services [ asynchronous connection-optimized channels manager for real-time data, etc. ].
― One of the modules used is open source: redux-effects-promise.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ], Declarative [ DP ], Functional [ FP ], Event-Driven [ ED ].
― SOLID, DRY, YAGNI.
― Loose Coupling, Code Reusability, Defensive Programming.
― Flux, Container/Presentational.
― User-First [ UCD ], Iterative SDLC.
― Clean Architecture.
― Monolithic [ +lazy loaded bundles and modules ].
― TypeScript 5, React 18 [ Class Components ].
― Redux, Redux Effects middleware.
― React Router.
― InversifyJS, Ramda.
― SignalR, @dagrejs/graphlib, Moment.js.
― OpenTelemetry, Chart.js, Google Maps.
― MSAL.js, CryptoJS.
― Bluebird, WebcamJS, localForage.
― ES7 Decorators, ES6 Promises.
― HTML 4/5, CSS 2/3.
― Flexbox, SASS/SCSS.
― UI Themes.
― Cross-browser [ Mobile, Desktop ], BrowserStack.
― Webpack 5, Node.js.
― ESLint/ESLint plugins.
― Karma, Jasmine.
― Git/Git Submodules, GitLab.
― Jira, Confluence.
― Figma, Slack, Hubstaff.

⬤ [ PROJECT #23 ] [ FEBRUARY 2023 ➜ OCTOBER 2024 ]
➤ [ [ B2B ][ Web Application: E-commerce Kiosk ] Customizable web-based digital kiosk application, the secondary entry point for all in-store customers ]:
― Goal: Create a web-based digital kiosk e-commerce application for in-store tablets and TVs.
― Result: Successfully launched for commercial use [ March 2023 ➜ PT ].
➤ [ Front-End Tech Lead | Team Lead Role [ in a team of up to 3 front-end developers ] ]:
― 70% coding, 30% other tasks.
― Creating, initializing, and launching into production.
― Designing the architecture and developing business modules of increased complexity.
― Participating in the design of the client-server architecture.
― Developing the essential communication protocols.
― Integrating with the API.
― Integrating with the ecosystem's web applications.
― Ensuring that deadlines are met.
― Working closely with the team [ QA, Devs, Designers ] and the business [ PO, CEO ].
― Unit testing and code review.
➤ [ Key Achievements and Personal Contributions ]:
― Creator and sole developer during the launch phase into the production environment.
― Successfully launched in under a month, based on the second build profile of the e-commerce module [ Project #21 ].
― Successfully developed and launched the SSO feature within 24 hours to meet customer demands.
― A configuration-based dynamic user interface.
― Numerous themes for various stores are based on an extensible SASS/SCSS core theme.
― Successfully reused and enhanced the core front-end library [ Project #24 ] within a related business environment.
➤ [ Tech Stack & Work Env. ]:
― Project #21 and #24 dependencies.
― Paradigms: Object-Oriented [ OOP ], Declarative [ DP ], Functional [ FP ], Event-Driven [ ED ].
― Flux, Container/Presentational.
― Design-first, Iterative SDLC.
― Monolithic [ +lazy loaded bundles and modules ].
― UI Themes.
― Responsive Design [ TV/Kiosk, Tablet ].
― Cross-browser Rich SPA.
― SSO, JSON-RPC, CORS.
― Git/Git Submodules, WebStorm.

⬤ [ PROJECT #22 ] [ MARCH 2018 ➜ JUNE 2021 ]
➤ [ [ B2B ][ Local Application Server ] Cash Register Gate Service v1.0, the primary in-store SOA server for all in-store web applications ]:
― Successfully launched for commercial use [ May 2018 ➜ June 2021; v2.0 migrated to the .NET platform ].
➤ [ Full-Stack Tech Lead | Team Lead Role [ a team of 1 full-stack expert ] ]:
― 80% coding, 20% other tasks.
― Creating, initializing, and launching into production.
― Frontend-Backend Architecture Design.
― Client-Server Architecture Design.
― Developing static [ Java, TypeScript ] and dynamic [ JavaScript ] modules.
― Integrating into the existing ecosystem.
― Migrating frontend: v1.0 [ Java, Socket.IO ] ➜ v2.0 [ .NET, SignalR ].
― Conducting manual tests.
➤ [ Key Achievements ]:
― Developed from the ground up following this paradigm: designed ➜ implemented ➜ launched ➜ no service updates required ➜ zero crashes or failures.
― Fault-tolerant service: dynamic tasks are automatically recovered after potential failures, ensuring the service remains unaffected.
― Customizable, extensible, and updatable backend logic supports all frontend components.
― Multi-layer architecture ensured a smooth and seamless migration from Socket.IO to SignalR.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ], Multithreading [ MP ], Event-Driven [ ED ].
― Code-first, Waterfall SDLC.
― SOA, Event Bus.
― JavaScript, TypeScript.
― InversifyJS, Socket.IO.
― Java SE 8, Nashorn [ JavaScript engine ].
― Google Guava, Google Guice, Google Gson.
― ZeroMQ, NettySocketIO.
― Imgscalr, ZXing, SLF4J.
― H2 Database, Apache MINA, Jetty Server.
― OpenSSL, Certificates.
― Java Keytool, Java KeyStore.
― WebSocket, JSON-RPC.
― Maven, Git.
― Hubstaff.

⬤ [ PROJECT #21 ] [ MARCH 2020 ➜ OCTOBER 2024 ]
➤ [ [ B2B ][ Web Application: E-commerce Store ] Customizable web-based online store v1.0, the primary entry point for online customers ]:
― Successfully launched for commercial use [ February 2021 ➜ October 2024 ].
➤ [ Front-End Tech Lead | Team Lead Role [ in a team of up to 3 front-end developers ] ]:
― 60% coding, 40% other tasks.
― Creating, initializing, and launching into production.
― Designing the architecture and developing business modules of increased complexity.
― Participating in the design of the client-server architecture.
― Developing the essential communication protocols.
― Integrating with the ecosystem's web applications.
― Integrating with the API.
― Ensuring optimal SEO performance.
― Adapting and launching the MVP application on the React Native platform.
― Ensuring that deadlines are met.
― Estimating development tasks.
― Working closely with the team [ QA, Devs, Designers ] and the business [ PO, CEO ].
― Unit testing and code review.
➤ [ Key Achievements and Personal Contributions ]:
― Creator and sole developer during the MVP launch phase.
― Maximized the potential of the SPA-based frontend platform to achieve optimal SEO performance.
― Successfully launched the app using React Native in the early development stages. The application featured integrations with Android hardware, including the camera, fingerprint authentication service, and Firebase services.
➤ [ Tech Stack & Work Env. ]:
― Project #24 dependencies.
― Paradigms: Object-Oriented [ OOP ], Declarative [ DP ], Functional [ FP ], Event-Driven [ ED ].
― Flux, Container / Presentational.
― User-First [ UCD ], Iterative SDLC.
― Monolithic [ +lazy loaded bundles and modules ].
― React Native, NativeBase.
― React Native Firebase, React Native Camera.
― accessiBe, ZXing.
― UI Themes.
― Responsive Design [ Mobile, Tablet, Desktop ].
― Cross-platform Rich SPA / RTA [ Real-Time Application ].
― WebSocket, JSON-RPC, CORS.
― WKWebView, iframe, Cross-document messaging.
― SEO, Prerender.io, Lighthouse.
― Web analytics tools, Reverse proxy.
― CloudFlare caching, HTTP caching.
― Git / Git Submodules, WebStorm.

⬤ [ PROJECT #20 ] [ JULY 2017 ➜ OCTOBER 2024 ]
➤ [ [ B2B ][ Web Application: Online Cash Register for POS Systems ] Point of Sale system cashier.sweedpos.com, the primary web application used by all cashiers in each store ]:
― Goal: Create a web application specifically designed for cashiers to use on in-store tablets and desktops.
― Result: Successfully launched for commercial use [ 2018 ➜ Present ].
➤ [ Front-End Team Lead | Tech Lead | Lead Developer Role [ in a team of up to 4 front-end developers ] ]:
1] Responsibilities as a Lead Developer:
― Integrating with APIs.
― Conducting code reviews.
2] Responsibilities as a Tech Lead:
― Creating, initializing, and launching the project into production
― Critical area of responsibility: high cost of errors and malfunctions
― Ensuring and monitoring code quality
3] Responsibilities as a Team Lead:
― Estimating development tasks.
― Meeting deadlines and ensuring timely delivery.
― Assisting the team in developing optimal solutions.
― Collaborating closely with product teams [ QA, Devs, Designers, Tier-3 Support ] and business stakeholders [ PO, CEO ].
➤ [ Key Achievements and Personal Contributions ]:
― Creator and Sole Developer: Led the launch phase into the production environment as the creator and sole developer.
― Expedited MVP Launch: Accelerated the release of the MVP by leveraging the core front-end library, reducing time-to-market.
― 100+ Significant Releases: Successfully delivered over 100 impactful releases, driving product growth and enhancing system stability.
― Exceptional Release Stability: Maintained an extremely low rollback rate across all releases.
― Complex Business Logic Modules: Designed and implemented dozens of highly intricate and non-trivial business logic modules, addressing critical operational needs.
― Multiple Operating Modes: Rapidly designed and implemented support for various application operating modes, including e-commerce and guest modes, improving flexibility and user experience.
― Thriving Under Pressure: Consistently excelled in high-pressure environments with tight deadlines, maintaining both high performance and quality.
➤ [ Tech Stack & Work Env. ]:
― Project #24 dependencies.
― Paradigms: Object-Oriented [ OOP ], Functional [ FP ], Event-Driven [ ED ].
― Flux, Container / Presentational.
― User-First [ UCD ], Iterative SDLC.
― Monolithic [ +lazy loaded bundles and modules ].
― Responsive Design [ Tablet, Desktop ].
― Cross-browser Rich SPA, Complex RTA [ Real-Time Application ].
― WebSocket, JSON-RPC, CORS.
― SSO, PIN Authentication / Authorization.
― Cloudflare Caching, HTTP Caching.
― Git / Git Submodules, WebStorm.

⬤ [ PROJECT #19 ] [ JULY 2017 ➜ OCTOBER 2024 ]
➤ [ [ Web Portal: Private online office ] Private online office store.sweedpos.com, the primary working portal for all employees across all stores ]:
― Successfully launched for commercial use [ 2018 ➜ PT ].
➤ [ Front-End Tech Lead | Team Lead Role [ in a team of up to 6 front-end developers ] ]:
― 70% coding, 30% other tasks.
― Creating, initializing, and launching into production.
― Designing the architecture and developing business modules of increased complexity.
― Developing platform and infrastructure modules.
― Critical area of responsibility: high cost of errors and malfunctions.
― Troubleshooting and resolving critical, complicated, and non-trivial issues and incidents.
― Participating in the design of the client-server architecture.
― Developing the essential communication protocols.
― Integrating with the API.
― Integrating with external equipment [ USB scanners, etc. ].
― Ensuring data consistency across synchronous and asynchronous channels.
― Ensuring both backward compatibility and long-term usability.
― Ensuring that deadlines are met.
― Estimating development tasks.
― Producing optimal solutions with the team.
― Working closely with the team [ QA, Devs, Designers, Tier-3 Support ] and the business [ PO, CEO ].
― Unit testing and code review.
― Ensuring and monitoring code quality.
➤ [ Key Points ]:
― Tight deadlines.
― A highly stressful work environment.
― Highly complicated and non-trivial business logic.
➤ [ Tech Stack & Work Env. ]:
― Dependencies of Project #24.
― Paradigms: Object-Oriented [ OOP ], Functional [ FP ], Event-Driven [ ED ].
― Flux, Container/Presentational.
― Design-first, Iterative SDLC.
― Monolithic [ +lazy loaded bundles and modules ].
― Responsive Design [ Tablet, Desktop ].
― Rich SPA, Complicated RTA [ Real-Time Application ].
― WebSocket, JSON-RPC.
― SSO, CORS.
― CloudFlare caching, HTTP caching.
― Git/Git Submodules, WebStorm.

⬤ [ PROJECT #18 ]
➤ [ BossUI private online office for managing payment terminals [WALLI IT, INC] ]:
― Successfully launched for commercial use.
➤ [ Principal Front-End Developer Role [a team of 1 front-end expert] ]:
― Architecture design, developing modules.
➤ [ Tech Stack & Work Env. ]:
― TypeScript, React [ Class Components ]
― Redux, InversifyJS, Moment.js.
― Flexbox, SCSS.
― Rich SPA, Flux, JSON-RPC.
― Webpack, Git.

⬤ [ PROJECT #17 ]
TODO

⬤ [ PROJECT #16 ]
TODO

GetTransfer LTD
Front-End Lead Engineer

⬤ [ 1 YEAR 6 MONTHS ] [ OCTOBER 2018 ➜ MARCH 2020 ] [ PART-TIME: 10-15 HOURS PER WEEK | OUTSOURCE | REMOTE ]
⬤ [ COMPANY SPECIFICS AND PROFILE ]:
― Turnkey product development for online marketplaces that connect passengers with drivers for private transfers worldwide.
― An established and successful company.

⬤ [ PROJECT #15 ] [ OCTOBER 2018 ➜ MAY 2019 ]
➤ [ [ Marketplace ][ Web Application: Private Online Office ] Private online office for managing vehicles, passengers, and drivers for private transfers worldwide ]:
― Goal: Create a personal online office for administrators to manage domain entities.
― Result: Successfully launched for commercial use [ 2019 ].
➤ [ Front-End Lead Developer Role [ a team of 1 front-end expert ] ]:
― 90% coding, 10% other tasks.
― Creating, initializing, and launching into production.
― Designing the architecture and developing modules.
― Developing a robust UI Kit with modular and reusable components.
― Participating in the design of the client-server architecture.
― Integrating with the API.
― Ensuring that deadlines are met.
― Working closely with the team [ Devs, Designers ] and the business [ PO ].
➤ [ Key Achievements ]:
― First in my career and immediately successful: an experience using Vue as a front-end platform.
― Developed a connector [ bridge ] to seamlessly integrate Redux with Vue for state management, similar to the reduxjs/react-redux library.
― Successfully reused and enhanced the core front-end library [ Project #24 ] within a related business environment.
➤ [ Tech Stack & Work Env. ]:
― Project #24 dependencies.
― Paradigms: Object-Oriented [ OOP ], Functional [ FP ].
― Flux, Container / Presentational.
― User-First [ UCD ], Waterfall SDLC.
― Monolithic [ +lazy loaded bundles and modules ].
― TypeScript, Vue 2.
― vue2-dropzone, vue-property-decorator.
― Redux, Redux Effects middleware.
― React Router, InversifyJS.
― ES7 Decorators, ES6 Promises.
― Flexbox, SCSS.
― Responsive Design [ Desktop ].
― Cross-browser Rich SPA, BrowserStack.
― REST, CORS.
― iframe integration.
― Webpack, Git.
― Figma, Hubstaff, Slack.

Crif LLC
Senior Software Developer

⬤ [ 3 MONTHS ] [ MAY 2017 - JULY 2017 ] [ FULL-TIME: 40 HOURS PER WEEK | SHORT-TERM CONTRACT | ONSITE ]
⬤ [ COMPANY SPECIFICS, PROFILE, AND TECHNOLOGY STACK ]:
― Turnkey product development in the areas of credit bureaus, business information, outsourcing, processing services, and credit solutions.
― An established and successful company.
― Frontend: React & TypeScript; Backend: Java.

⬤ [ PROJECT #13 ] [ MAY 2017 ➜ JULY 2017 ]
➤ [ [ B2B ][ Web Application: Private Online Office ] Contact Internationalization Project ]:
― Goal: Porting the flagship Delphi desktop application to the web platform.
― Result: Successfully launched for MVP use [ 2017 ].
➤ [ Front-End Senior Developer Role [ in a team of up to 3 front-end developers ] ]:
― 90% coding, 10% other tasks.
― Developing modules and UI components of increased complexity.
― Integrating with the API.
― Code review.
― Actively participating in discussions regarding the architecture and system requirements.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ], Reactive [ RP ].
― Flux, Container / Presentational.
― API-first, Iterative SDLC.
― Monolithic [ +lazy loaded bundles and modules ].
― TypeScript, Angular 4.
― RxJS, NgRx.
― ng2-dragula, angular2-jwt.
― ag-grid-enterprise, Ramda, jQuery.
― Flexbox, SASS / SCSS.
― Cross-browser Rich SPA.
― REST.
― Webpack, Git.
― Slack, Gitlab.

Acronis LLC
Senior Software Developer

⬤ [ 1 YEAR 10 MONTHS ] [ MARCH 2015 ➜ DECEMBER 2016 ] [ FULL-TIME: 40-50 HOURS PER WEEK | LONG-TERM CONTRACT | ONSITE ]
⬤ [ COMPANY SPECIFICS, PROFILE, AND TECHNOLOGY STACK ]:
― Turnkey product development for cybersecurity and data protection technologies.
― An established and successful company.
― Frontend: ExtJS & Angular & TypeScript; Backend: C++ & Python.

⬤ [ PROJECT #12 ] [ AUGUST 2016 ➜ SEPTEMBER 2016 ]
➤ [ [ Web Application: Bootstrapper ] A multi-functional bootstrapper for web applications in standalone and geo-distributed data centers ]:
― Goal: Create a bootstrapper for customizable geo-distributed web applications, hosted on a domain that serves as the single entry point for all clients.
― Result: Successfully launched for commercial use.
➤ [ Front-End Lead Developer Role [ a team of 1 front-end expert ] ]:
― 90% coding, 10% other tasks.
― Creating, initializing, and launching into production.
― Integrating into the existing ecosystem.
― Designing the architecture and developing modules.
― Critical area of responsibility: high cost of errors and malfunctions.
― Unit testing and integration testing.
➤ [ Key Achievements ]:
― Developed from the ground up following this paradigm: designed ➜ implemented ➜ launched ➜ no service updates required ➜ zero crashes or failures.
― The module operates successfully in two modes simultaneously for the following products: «On-Premise Backup Software» [ standalone mode ] and «Cloud Backup as a Service» [ cloud mode ].
➤ [ Key Points ]:
― The module operates successfully in a fully connected mesh topology ecosystem.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ].
― Code-first, Waterfall SDLC.
― Monolithic.
― TypeScript 2.
― Bluebird, InversifyJS.
― fetch, CORS.
― Cross-platform application.
― Karma, Jasmine.
― Webpack 2, Node.js, Git.

⬤ [ PROJECT #11 ] [ NOVEMBER 2015 ➜ DECEMBER 2016 ]
➤ [ [ Web Application: Private Online Office ] Personal Online Office for Customers: account.acronis.com ]
― Goal: Create a personal online office for customers within the Acronis ecosystem.
― Result: Successfully launched for commercial use.
➤ [ Front-End Tech Lead Role [ in a team of up to 5 front-end developers ] ]:
― 60% coding, 40% other tasks.
― Creating, initializing, and launching into production.
― Developing TypeScript business modules and components of increased complexity.
― Developing front-end platform and infrastructure modules.
― Conducting research and maintaining Angular as the corporate front-end platform.
― Troubleshooting issues related to cross-browser compatibility and performance.
― Code review.
― Actively participating in the architecture committee.
― Working closely with the team [ QA, Devs, Designers ] and the business [ PM ].
― Conducting interviews for the Senior/Middle Front-End Developer position.
➤ [ Key Achievements and Personal Contributions ]:
― Selected the open-source seed project for Angular applications.
― First in my career and immediately successful: an experience using Angular as a corporate front-end platform.
― Developed the angular2-cache library, which implements a caching strategy based on NgZone to address a challenging task for improving application performance.
― Smooth migration from Angular2.0.0-beta.7 to Angular2.0 through numerous intermediate versions.
― Several of the modules used in the project are released as open source, including ngx-post-message, ngx-dynamic-template, angular2-cache, ngx-i18next, ts-smart-logger.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ].
― Design-first, Iterative SDLC.
― Flux, Monolithic.
― TypeScript 2, Angular 2.
― RxJS, Bluebird.
― i18next, Lodash.
― Cross-browser Rich SPA.
― REST.
― Webpack 2, Node.js, SVN.
― Jira, Confluence.
― PlantUML, Figma.

➤ [ PROJECT #10 ]
➣ [ User licence management module [a submodule of «On-Premise Backup Software»] ]
― Successfully launched for commercial use.
➣ [ Principal Front-End Developer Role [in a team of up to 3 front-end developers] ]:
― Design, developing TypeScript modules, code review, unit testing.
― Integrating into the main module via iframe.
➤ [ Key Achievements and Personal Contributions ]:
― First and successful experience using Angular 2 as a corporate front-end platform: research, implementation and troubleshooting.
➣ [ Stack and Work environment ]:
― TypeScript 2, Angular 2.
― RxJS, Bluebird, i18next, Lodash.
― Flux, REST, postMessage, iframe.
― Karma, Jasmine.
― Webpack 2, SVN, npm.
― Figma.

⬤ [ PROJECT #9 ] [ MARCH 2015 ➜ DECEMBER 2016 ]
➤ [ [ Web Application: Private Online Office ] Personal Online Office for Customers: baas.acronis.com ]
― Goal: Maintain the flagship «Acronis Backup 12» application and create a next-generation application.
― Result: Successfully maintained for commercial use.
➤ [ Front-End Senior Developer Role [ in a team of up to 3 front-end developers ] ]:
― 70% coding, 30% other tasks.
― Developing modules and components of increased complexity for the current application based on ExtJS 4.
― Conducting research on ExtJS 6 as the corporate front-end platform.
― Creating a next generation application based on ExtJS 6.
― Code review.
― Actively participating in the architecture committee.
― Collaborating closely with the team [ QA, Devs, Designers ] and the business [ PM ].
➤ [ Key Achievements and Personal Contributions ]:
― Successfully maintained and stabilized legacy code, ensuring reliability and performance.
― Developed and implemented dozens of new features in a large legacy system.
― Played a key role in building a next-generation ExtJS 6-based application as part of a team of 2 developers.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ].
― Design-first [ UCD ], Iterative SDLC.
― MVVM, Monolithic.
― JavaScript ES5, TypeScript.
― ExtJS 4, ExtJS 6.
― Cross-browser Rich SPA.
― REST.
― SVN.
― Jira, Confluence.

➤ [ PROJECT #8 ]
➣ [ Email Templates ]
― Successfully launched for commercial use.
― Principal Front-End Developer Role [a team of 1 front-end expert].
➣ [ Stack and Work environment ]:
― HTML, emailonacid.com.
― Java, Jira.

IMIGO.ME Limited [ Start-Up ]
Front-End Lead Developer

⬤ [ 3 MONTHS ] [ DECEMBER 2015 ➜ FEBRUARY 2016 ] [ PART-TIME: 20 HOURS PER WEEK | SHORT-TERM CONTRACT | REMOTE ]
⬤ [ COMPANY SPECIFICS, PROFILE, AND TECHNOLOGY STACK ]:
― Turnkey product development in the social networking and dating domain.
― Start-up [ 2015 ➜ 2016 ].
― Frontend: AngularJS & JavaScript; Backend: Python.

⬤ [ PROJECT #7 ] [ DECEMBER 2015 ➜ FEBRUARY 2016 ]
➤ [ [ Web Application: Social Selling ] Relationship-based market ]:
― Successfully launched for commercial use [ 2016 ].
➤ [ Front-End Lead Developer Role [ in a team of up to 2 front-end developers ] ]:
― 90% coding, 10% other tasks.
― Creating, initializing, and launching into production.
― Designing the architecture and developing business modules.
― Developing platform and infrastructure modules.
― Effective troubleshooting.
― Ensuring that deadlines are met.
― Working closely with the team [ QA, Devs, Designers ] and the business [ CEO ].
➤ [ Key Achievements and Personal Contributions ]:
― Successfully developed from the ground up over 3 months on a part-time basis.
― First in my career and immediately successful: an experience using AngularJS as a front-end platform.
― Drafted the entire UI.
― Implemented micro library for responsive UI.
― Automated the application build using JavaScript.
➤ [ Key Points ]:
― Tight deadlines.
― Our main goal is to create a user-friendly platform where individuals can sell their services.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ].
― Design-first, Waterfall SDLC.
― MVC, Monolithic.
― JavaScript ES6, AngularJS, Babel.
― AngularUI, angular-gettext, jQuery.
― Responsive Design [ Desktop ].
― CSS 2, LESS.
― Cross-browser Rich SPA.
― REST, Long Polling.
― Gulp, SystemJS.
― Bower, Git.

E.Soft
Lead Programmer

⬤ [ 6 MONTHS ] [ SEPTEMBER 2014 ➜ FEBRUARY 2015 ] [ FULL-TIME: 40 HOURS PER WEEK | LONG-TERM CONTRACT | ONSITE ]
⬤ [ COMPANY SPECIFICS, PROFILE, AND TECHNOLOGY STACK ]:
― Turnkey product development in the field of automated workflow solutions for government organizations.
― An established and successful company.
― Frontend: ExtJS & JavaScript; Backend: Java & PostgreSQL.

⬤ [ PROJECT #6 ] [ SEPTEMBER 2014 ➜ JANUARY 2015 ]
➤ [ [ Command-line Tool: Data Migration Assistant ] A data migration tool designed for importing IBM Lotus Notes files into PostgreSQL ]
― Successfully migrated data into the Workflow Management System [ WFMS ].
➤ [ Back-End Lead Developer Role [ a team of 1 back-end expert ] ]:
― Development of migration algorithms, SQL expressions and Java modules.
➤ [ Key Achievements ]:
― More than 15 million successfully imported XML and binary files; more than 10 million entities created in the database.
― Transactional algorithm of operation: import process recovery after a possible failure or a deliberate interruption of the tool operation.
➤ [ Key Points ]:
― Challenge Task.
― The tool dynamically creates structures for tables and dependent tables, as requested.
― Tens of terabytes of imported data.
― Import process time is more than 24 hours; no errors caused by memory overflow.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Procedural [ PP ].
― Code-first.
― Java SE 7, SQL, XML.
― Java NIO, Google Guava.
― jOOQ, Joda-Time, SLF4J.
― PostgreSQL, Maven, SVN.
― TeamCity, YouTrack, IntelliJ Idea.

⬤ [ PROJECT #5 ] [ DECEMBER 2014 ➜ FEBRUARY 2015 ]
➤ [ [ Command-line Tool: Data Migration Assistant ] A data migration tool based on existing WFMS Java modules, designed for importing XML files into PostgreSQL ]:
― Successfully migrated data into the Workflow Management System [ WFMS ].
➤ [ Back-End Lead Developer Role [ a team of 1 back-end expert ] ]:
― Approximately 90% for coding and 10% for all other activities.
― Searching for viable solutions.
― Developing the migration algorithms and Java modules.
― Critical area of responsibility: high costs of errors.
― Manual testing.
➤ [ Key Achievements ]:
― Successfully developed a tricky XML file importer adapter under a tight deadline for a Spring IoC-based system that lacks an external API layer to manage entities.
➤ [ Key Points ]:
― Challenge Task.
― Tight deadlines.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Procedural [ PP ].
― Code-first.
― Java SE, PL/pgSQL.
― Spring IoC, JAXB.
― PostgreSQL, Maven, SVN.
― TeamCity, YouTrack, IntelliJ Idea.

⬤ [ PROJECT #4 ] [ NOVEMBER 2014 ➜ JANUARY 2015 ]
➤ [ [ Web Application: Dynamic Admin Panel ] Web Client for the Workflow Management System ]:
― Goal: Porting the flagship Java Swing desktop application to the web platform.
― Result: Successfully launched for MVP use [ 2015 ].
➤ [ Full-Stack Lead Developer Role [ a team of 1 full-stack expert ] ]:
― 90% coding, 10% other tasks.
― Building an application entirely from the ground up.
― Designing the architecture and developing modules.
― Integrating into a vast and complex legacy ecosystem built on the Java Spring Framework.
― Conducting manual tests.
➤ [ Key Achievements ]:
― Successfully developed from the ground up and integrated within three months.
― A multi-layered architecture that decouples the fully dynamic user interface from the core functionality.
― Thanks to the project, the complex desktop application built on Java Swing now has a fully functional web version available as an alternative.
➤ [ Key Points ]:
― Challenging Task.
― Tight deadlines.
― An XML-based user interface that is dynamic and extensible, incorporating dynamic JavaScript functionality.
➤ [ Tech Stack & Work Env. ]:
― Paradigms: Object-Oriented [ OOP ].
― Code-first, Waterfall SDLC.
― MVC, Monolithic.
― JavaScript ES5, ExtJS 5, Google Closure.
― Dynamic JavaScript in the Sandbox.
― Cross-browser Rich SPA.
― SASS/SCSS.
― JSON-RPC 2, JXON, XML.
― Java EE, Servlets 3, JSP.
― Google Guice, Google Gson, Guice-Servlet.
― Java Spring Framework, Java Swing.
― Tomcat, Maven, SVN.
― TeamCity, YouTrack, IntelliJ Idea.

QIWI Ltd

⬤ [ 6 YEARS 1 MONTH ] [ JULY 2008 ➜ JULY 2014 ] [ FULL-TIME | LONG-TERM CONTRACT | ONSITE ]
⬤ [ COMPANY SPECIFICS, PROFILE, AND TECHNOLOGY STACK ]:
― Turnkey product development in the field of electronic payment processing, self-service kiosks and e-wallets.
― An established and successful company.
― Front-End: JavaScript & ExtJS; Back-End: Java & Oracle.

⬤ [ PROJECT #3 ] [ JANUARY 2011 ➜ JULY 2011 ]
➤ [ For payment kiosks: «Provider Visibility» module, the payment system core ]:
― Successfully launched for commercial use.
➤ [ Principal Full-Stack Developer Role [ a team of 1 full-stack expert ] ]:
― Architecture design, developing modules and SQL queries.
― Critical area of responsibility: high cost of errors and malfunctions.
― Designing database and algorithms.
― Creating performance benchmarks.
― Integrating into the existing ecosystem.
― Unit testing.
― Documenting the architecture.
➤ [ Achievements ]:
― The Java module v1.0 implements complex algorithms and operates under high loads for approximately 1.5 years without a single glitch.
― The designed architecture does not require frontend and database rework for the performance-enhanced Java module v2.0.
➤ [ Key Points ]:
― Challenging task.
― Algorithmic challenge.
➤ [ Tech Stack & Work Env. ]:
― Java, SQL.
― JavaScript, ExtJS 3.
― Memcached, JUnit.
― Oracle, Git.
― TeamCity, Toad, IntelliJ Idea.

⬤ [ PROJECT #2 ]
➤ [ Jira plugins for in-house customers ]:
TODO

⬤ [ PROJECT #1 ] [ July 2008 ➜ July 2014 ]
➤ [ Private online office agent.qiwi.com, the main working portal for all customers ]:
― Successfully launched for commercial use.
➤ [ Principal Full-Stack Application Developer Role [ in a team of up to 12 developers ] ]:
― Developing modules, SQL queries and PL/SQL expressions.
― Approximately 20% of system [core] tasks; approximately 80% of application [business] tasks.
― Unit testing, code review.
― Troubleshooting and fixing critical issues.
― Working closely with customers, QA, PMs, release managers, database developers, and core module developers.
― Preparing and forming releases.
― Participating in Scrum meetings and retrospectives.
➤ [ Final year: Team Leader, acting as a Project Manager [in a team of up to 3 developers] ]:
― Ensuring deadlines are met.
― Providing itemized estimates for development work.
― Analyzing requirements, task specifications, and prototypes, and converting them into Jira tasks.
― Bringing any major issues up to the relevant stakeholders, assigning duties to regular developers.
― Conducting job interviews with candidates for JavaScript developer positions.
➤ [ Achievements and personal contributions ]:
― From a junior position to a lead in 3.5 years.
― Most extensive and successful career experience as a Full Stack Developer [JavaScript, Java, SQL, PL/SQL].
― More than ~300 successfully developed application and system tasks.
― More than ~50 significant, successful releases.
➤ [ Key Points ]:
― Highly stressful work environment.
― Bi-weekly releases in line with Agile sprint planning.
➤ [ Tech Stack & Work Env. ]:
― JavaScript, ExtJS 2-4.
― Java, SQL, PL/SQL.
― Apache Struts, JSP, Servlets, JDBC.
― Google Guice, Google Gson, Google Guava, Guice-servlet.
― Memcached, Apache Camel, JasperReports.
― OWASP AntiSamy, FreeMarker.
― Oracle, Tomcat.
― MVC, Rich SPA, JSON-RPC, Short Polling.
― JUnit, TestNg.
― Maven, Git, SVN.
― Gerrit, Toad, IntelliJ Idea.
― eToken, Certificates.
― TeamCity, Jira, Lotus Notes.
― Agile, Scrum.

* 15.5 years ➤ ECMAScript [ 2009/ES5 ‒ 2023 ] ● HTML [ 4 ‒ 5 ]
* 11 years ➤ Git/Git Submodules
* 8.5 years ➤ TypeScript [ 1 ‒ 5 ] ● Webpack [ 2 ‒ 5 ]
* 8 years ➤ ExtJS [ 2 ‒ 6 ]
* 7.5 years ➤ React [ 15 ‒ 18 ] ● Redux ● InversifyJS
* 7 years ➤ Java SE [ 5 ‒ 8 ]
* 6.5 years ➤ Java EE
* 2 years ➤ Angular [ 2 ‒ 5 ]
* 8 months ➤ Vue [ 2 ]