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Alex Golubtsov
Verified Expert in Engineering
Software Developer
Prague, Czech Republic
Toptal member since April 22, 2020
Bio
Alex is a qualified technical developer with over 10 years of commercial experience. During this period, he has gained valuable experience in companies of different sizes, both startups and corporations. Alex strives for challenging projects that utilize his skills and experiences and allows him to grow professionally.
Portfolio
Oura
Front-end, Node.js, Hasura, GraphQL, Agile, TypeScript, React...
Sparta Software Corporation
TypeScript, GraphQL, Hasura, Pair Programming, WebSockets, Antd, Ant Design...
Exivity
RESTful Development, Git, HTML, Unit Testing, SaaS, Front-end Build Tools...
Experience
- Functional Programming - 10 years
- JavaScript - 10 years
- Object-oriented Programming (OOP) - 10 years
- React - 9 years
- Agile Software Development - 6 years
- TypeScript - 5 years
- GraphQL - 3 years
- Node.js - 3 years
Preferred Environment
Zoom, Slack, Visual Studio Code (VS Code), MacOS
The most amazing...
...project I've developed is a live gambling system that serves thousands of clients every single second, providing them real-time data.
Work Experience
Lead Software Engineer
2024 - PRESENT
Oura
- Transitioned the product to Oura following a strategic acquisition, taking on a pivotal role in integrating the Sparta Science platform with Oura's technologies.
- Collaborated effectively with diverse stakeholders to align project goals, define clear deliverables, and establish terms.
- Led the integration of existing and newly formed development teams, overseeing onboarding processes and mentoring new team members to ensure alignment and productivity.
Technologies: Front-end, Node.js, Hasura, GraphQL, Agile, TypeScript, React, Amazon S3 (AWS S3), Amazon Web Services (AWS), Amazon Cognito, Antd, Ant Design, APIs, Agile Software Development, Agile Leadership, Apollo, Architecture, Back-end, GitHub Actions
Lead Software Engineer
2020 - 2024
Sparta Software Corporation
- Led a remote team and built an entire web app from scratch. Hand-picked technologies to use, set up the development environment, defined Agile processes and git-flow with strict rules for pull requests, commits, cross-validation, and more.
- Built a successful MVP and its 1st production release.
- Trained the client's team to smoothly transition from the previous technology set to a new, completely different one. Provided guidance and mentored the team during the whole project's lifespan.
- Played an active role in hiring new team members by conducting technical interviews, validating results, and successfully onboarding candidates.
- Fostered team integrity, making sure everybody shares the same technical vision of the product.
Technologies: TypeScript, GraphQL, Hasura, Pair Programming, WebSockets, Antd, Ant Design, Git, GitHub, CircleCI, GitHub Actions, ESLint, Jest, Cypress, React, React Native, Expo, Expo.io, JavaScript, JavaScript 6, Recharts, Visx, React Apollo, Apollo, Create React App, JSON Web Tokens (JWT), Yarn, Webpack, Webpack 4, React-Intl, CSS, Less, Styled-components, Node.js, Agile, Agile Software Development, Management, Team Leadership, Agile Leadership, Remote Team Leadership, Amazon Web Services (AWS), Amazon Cognito, Amazon S3 (AWS S3), Functional Programming, Continuous Development (CD), Continuous Delivery (CD), Front-end, Single-page Applications (SPAs), React Router, Unit Testing, HTML, HTML5, Front-end Build Tools, Front-end Architecture, Front-end Development, SaaS, Leadership, IT Consulting, Software Architecture, JSON API, Requirements Analysis, Architecture, Offshore Team Management, Mobile, Mentorship & Coaching, Code Auditing, Software Design, Full-stack Development
Senior Software Engineer
2019 - 2020
Exivity
- Developed an application for cloud solutions providers used for a variety of purposes.
- Implemented a new application architecture based on microservices principles.
- Created a custom-specific UI library that standardizes the app and makes it more stable and reliable.
- Created a test abstraction layer and used both in-unit and E2E testing environments.
- Provided reviews and guidance to the other team members.
Technologies: RESTful Development, Git, HTML, Unit Testing, SaaS, Front-end Build Tools, HTML5, Web Development, Continuous Development (CD), Functional Programming, Styled-components, Agile, Continuous Delivery (CD), CSS, GitHub, Front-end, Agile Software Development, Lerna, Cypress, Storybook, Jest, Orbit, Redux, React, TypeScript, Continuous Integration (CI), REST, Webpack, Single-page Applications (SPAs), REST APIs, IT Consulting, Software Architecture, JSON API, Requirements Analysis, Architecture, Offshore Team Management, APIs, Code Auditing, Software Design
Software Engineering Consultant
2019 - 2020
Accenture
- Developed a complex platform that covers several insurance products. The top priority was scalability and maintainability.
- Coordinated the work of internal and external teams; I was part of the external one.
- Implemented business requirements and collaborated closely with the analytics team.
Technologies: RESTful Development, Git, HTML, Unit Testing, Express.js, Front-end Build Tools, HTML5, Web Development, Continuous Development (CD), Functional Programming, Agile, Continuous Delivery (CD), CSS, React Redux, Front-end, Agile Software Development, TypeScript, Jasmine, Ramda, Redux, React, ECMAScript (ES6), JavaScript, Continuous Integration (CI), CircleCI, REST, Webpack, Single-page Applications (SPAs), REST APIs, Jira, IT Consulting, Software Architecture, Styled-components, JSON API, Requirements Analysis, Architecture, Mentorship & Coaching, Code Auditing, Full-stack Development
Software Engineer
2017 - 2019
CA Technologies
- Developed an application performance management software that the most prominent companies use all over the world.
- Implemented a distributed network visualization tool.
- Bootstrapped a migration process from Angular to the modern React app.
- Improved the front-end application performance by analyzing and reducing the complexity of its algorithms.
Technologies: RESTful Development, Git, HTML, Unit Testing, SaaS, Front-end Build Tools, HTML5, Web Development, Object-oriented Programming (OOP), Functional Programming, Agile, CSS, React Redux, Back-end, Front-end, Agile Software Development, Jasmine, Selenium, Spring, Java, React, Angular, JavaScript, Continuous Delivery (CD), Continuous Integration (CI), Continuous Development (CD), Data Visualization, REST, AngularJS, Material UI, Single-page Applications (SPAs), REST APIs, Jira, JSON API, Windows, Code Auditing, Full-stack Development
Software Developer
2016 - 2017
Avast
- Developed all Avast Browser core extensions, including the most demanded one, which provides a safe environment for sensitive online operations like finance, health, and more.
- Created the UI of the new antivirus desktop application using Electron.
- Improved the application reliability by implementing clear architecture and dependencies management. The impact was trackable among end-users.
- Coordinated the work of internal and external teams, being a part of the internal one.
- Developed the new Avast Antivirus application using the modern JavaScript stack.
Technologies: Git, HTML, Unit Testing, Front-end Build Tools, HTML5, Web Development, Object-oriented Programming (OOP), Functional Programming, Agile, CSS, Front-end, Electron, Chrome Extensions, Python, ECMAScript (ES6), JavaScript, Continuous Delivery (CD), Continuous Integration (CI), Continuous Development (CD), Full-stack, Webpack, Leadership, Software Architecture, JSON API, Requirements Analysis, Architecture, Linux, APIs, Code Auditing, Software Design, Full-stack Development
Senior Web Application Developer
2014 - 2016
Betsys
- Developed a real-time application for live gambling that is used by thousands of users.
- Created a layer between the database and the front-end application, handling real-time data in both directions.
- Improved the back-end scalability by implementing a clear architecture.
Technologies: Git, HTML, MySQL, Express.js, Socket.IO, Front-end Build Tools, Web Development, WebSockets, Object-oriented Programming (OOP), Functional Programming, SQL, CSS, Redux, React Redux, Back-end, Front-end, PostgreSQL, Redis, PHP, Node.js, Flux, React, JavaScript, Full-stack, REST, Single-page Applications (SPAs), REST APIs, Software Architecture, JSON API, Requirements Analysis, Linux, Windows, APIs, Code Auditing, Software Design, Full-stack Development
Senior PHP Developer
2012 - 2014
MikroBill
- Developed an application for ISP (internet service providers), providing rich functionality for managing, monitoring, and accounting for businesses worldwide.
- Created SNMP and NetFlow monitoring tools, handling a large amount of data from different devices.
- Implemented integrations with accounting, payment, and social services for our platform.
Technologies: Git, HTML, Web Development, Object-oriented Programming (OOP), SQL, CSS, GitHub, Back-end, Front-end, JavaScript, MySQL, PHP, Full-stack, REST APIs, Linux, Windows, Networks, APIs, Software Design, Full-stack Development
PHP Developer
2012 - 2012
SECL Group
- Developed a sophisticated eCommerce product that is used worldwide.
- Tracked and fixed bugs using the internal management software.
- Implemented UX design for various projects in cooperation with UI/UX designers and illustrators.
Technologies: Git, HTML, Web Development, Object-oriented Programming (OOP), SQL, CSS, Back-end, Front-end, JavaScript, MySQL, PHP, Full-stack, REST APIs, Linux, Windows, APIs, Full-stack Development
Experience
Live Gambling Application
The project consists of a React application on the front end, Node.js real-time data servers, and a PHP back end. I worked on all three parts. It serves a large amount of real-time data and thousands of users; performance was the priority.
Safe Mode Browser Extension
https://www.avast.com/secure-browserThe Avast Secure Browser's extension empowers end-users to execute sensitive operations safely within the browser. The extension employs JavaScript and Chrome Extensions API for its functionality, while also leveraging communication with the Avast Antivirus native application to provide a completely secure environment.
OpauthConnect | An Open-source Plugin for the esoTalk Forum Engine
https://bitbucket.org/alex-dev/opauthconnectThe open-source plugin, developed in PHP for the esoTalk forum engine, facilitates social media sign-in for users, supporting four different social media networks. However, the maintenance of the plugin has ceased along with the esoTalk platform itself.
Education
2008 - 2013
Master's Degree in Computer Science
V.I. Vernadsky TNU - Kyiv, Ukraine
Certifications
AUGUST 2016 - PRESENT
Machine Learning: Classification
University of Washington
JULY 2016 - PRESENT
Machine Learning: Regression
University of Washington
DECEMBER 2015 - PRESENT
Machine Learning
Stanford University
Skills
Libraries/APIs
Socket.IO, React Redux, React, JSON API, REST APIs, Node.js, Redux-Saga, Ramda, Antd, Recharts, React-Intl, React Router, jQuery, Social APIs, Facebook API, X (formerly Twitter) API, Google API
Tools
Front-end Build Tools, GitHub, Git, Webpack, Slack, Postman, Zoom, Lerna, Stylus, Expo.io, Expo, CircleCI, React Apollo, Create React App, Webpack 4, Amazon Cognito, Jira
Languages
GraphQL, HTML5, ECMAScript (ES6), HTML, JavaScript, TypeScript, CSS, Python, PHP, Less, SQL, Java, JavaScript 6
Frameworks
Jest, Redux, Cypress, Jasmine, Express.js, Angular, Spring, Electron, Flux, Selenium, React Native, AngularJS, Material UI, Ant Design, JSON Web Tokens (JWT), Yarn, Next.js, Tailwind CSS
Paradigms
Requirements Analysis, Unit Testing, RESTful Development, Agile Software Development, Functional Programming, Object-oriented Programming (OOP), REST, Continuous Integration (CI), Continuous Development (CD), Continuous Delivery (CD), Agile, Pair Programming, Management
Storage
Redis, MySQL, Hasura, MongoDB, PostgreSQL, Amazon S3 (AWS S3), Databases
Platforms
Mobile, Windows, Linux, Jupyter Notebook, Amazon Web Services (AWS), MacOS, Visual Studio Code (VS Code)
Other
Architecture, Back-end, Front-end, Web Development, Chrome Extensions, Web Scraping, Single-page Applications (SPAs), IT Consulting, APIs, Code Auditing, Full-stack Development, WebSockets, Storybook, TypeORM, SaaS, Full-stack, Styled-components, Leadership, Software Architecture, Offshore Team Management, Mentorship & Coaching, Software Design, Orbit, Data Visualization, GitHub Actions, ESLint, Visx, Apollo, Team Leadership, Agile Leadership, Remote Team Leadership, Front-end Architecture, Front-end Development, Computer Science, Browsers, Networks
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