Mihail S.

Mihail S.

Senior Software Engineer

Bucharest, Romania
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About Me

Mihail is a Senior Software Engineer with 10+ years of hands-on experience crafting scalable and maintainable web applications using various technologies, primarily JavaScript, React.js, Node.js, React Native, Redux, and Express. He has completed a dozen projects for major international companies and is also an experienced mentor with a proactive approach to problem-solving and an ability to prioritize tasks effectively. Mihail uses the power of technology to create innovative solutions for complex challenges, consistently delivering solutions that exceed expectations.

Work history

UpStack
UpStack
Senior Software Engineer
2020 - Present (5 years)
Remote
  • Creating and developing innovative software solutions for clients across a broad range of industries.

  • Participating in scrums consisting of cross-functional teams, both software and hardware.

  • Ensuring that features are being delivered efficiently and on time.

FlowX.AI
FlowX.AI
Front-end Developer
2024 - Present (1 year)
Bucharest (Hybrid), Romania

Working for the first multi-agent modernization platform built specifically for banking and financial services with advanced AI and a robust, flexible end-to-end platform.

Qualitest
Qualitest
Senior Software Engineer
2022 - 2024 (2 years)
Bucharest (Hybrid), Romania
  • Developed features, fixed bugs, and supported code reviews to maintain project quality.

  • Assisted in analyzing and estimating implementation efforts for effective project planning.

  • Mentored team members to foster growth and uphold coding standards.

  • Conducted interviews for new team members to assess their qualifications and fit for the team.

Sombra
Sombra
Senior Software Engineer
2020 - 2023 (3 years)
Remote
  • Developed unit and end-to-end tests using Jest and Cypress.

  • Monitored pull requests and conducted code reviews.

  • Communicated effectively with team and stakeholders and introduced innovative ideas to improve project efficiency.

  • Owned project outcomes from start to finish, driving initiatives and collaboration.

  • Interviewed prospective team members to evaluate their qualifications and compatibility.

Qualitest
Qualitest
Senior JavaScript Developer
2020 - 2020
Bucharest, Romania
  • Developed software solutions for the world's largest, independent managed services provider of quality assurance and testing solutions.

  • Built reusable and scalable code, identifying requirements for new features and providing optimization when needed.

  • Optimized components for maximum performance, coordinating with cross-functional teams across the organization.

Moovweb (now Edgio)
Moovweb (now Edgio)
Front-end Developer
2019 - 2019
Odessa, Ukraine
  • Worked on the development of a major American Airlines company project, writing and styling front-end components to meet the requirements of our mocks.

  • Connected the front end with the back end through REST API and fulfilled our user stories and tested features code.

  • Monitored process pull requests for production deployments and maintained a high test coverage.

Lohika
Lohika
JavaScript Developer
2017 - 2019 (2 years)
Odessa, Ukraine
  • Developed and maintained scalable SPAs based on React and Redux.

  • Developed and maintained server-side APIs using Node.js, Express.js, and MySQL.

  • Tested code by writing unit tests and E2E tests.

Andersen Lab
Andersen Lab
Front-end Developer
2016 - 2017 (1 year)
Odessa, Ukraine
  • Developed and maintained a rich SPA based on React and Redux.

  • Worked closely with the back-end team on developing REST APIs and performed code reviews.

  • Maintained and enhanced existing features of applications, collaborating with cross-functional teams and making recommendations that impacted the end product.

  • Applied layouts and made applications responsive to different resolutions.

UNI-LAMAN Group
UNI-LAMAN Group
Full-stack Developer
2013 - 2016 (3 years)
Odessa, Ukraine
  • Developed and maintained functionality of an existing web ERP system and database design on PostgreSQL.

  • Worked on the development of the UNI-LAMAN mobile application, a convenient tool for customers to execute different operations without leaving home.

  • Developed the full application from scratch, including REST API and integration with company database data.

  • Selected technical solutions that fit the company's current architectural needs.

  • Participated in discussions with end users to clarify requirements.

Portfolio

Senior Front-end Developer - United Airlines
Senior Front-end Developer - United Airlines

Wrote and styled front-end components that meet mocks' requirements, connect front end with the back end through REST API, and fulfill user stories and test features code. Monitored and processed pull requests for production deployments. Implemented new features, fixed bugs, performed code reviews, and analyzed requirements. Developed the new check-in module with plenty of flows depending on user type. Enhanced test coverage to 70% accessibility on each page. Technologies used: JavaScript, ES6, HTML5, CSS3, Sass, React.js, Redux, Redux-Thunk, React Router v3, Lodash, Immutable.js, Webpack, Babel, Git, ESLint, Sinon.js, Jest.

JavaScript Engineer  - Virtru (Google Drive Encryption)
JavaScript Engineer - Virtru (Google Drive Encryption)

The project is a SaaS platform for access control, policy enforcement, and key management service. It encrypts and controls access to files in Google Drive, with an extra layer of security in G Suite that ensures corporate privacy and meets regulatory requirements. Implemented new features, fixed bugs, performed code reviews, application stabilization, analyzing, app release, and estimating requirements. Improved code coverage and code quality. Technologies used: JavaScript, ES6, Node.js, Crypto, HTML5, CSS3, Git, ESLint.

Senior Front-end Developer - Clarizen Eagle
Senior Front-end Developer - Clarizen Eagle

The Clarizen Eagle app is an executive vehicle that drives management teams toward success, aligning management through goals and decisions and providing the agility needed to effectively achieve their business goals. Prepared the app for production, upgraded the outdated design, and increased app speed. Improved code coverage and code quality. Technologies used: JavaScript, ES6, HTML5, CSS3, Sass, React.js, Redux, Webpack, Babel, Git, ESLint.

Full-stack Developer  - UNI-LAMAN Mobile Application
Full-stack Developer - UNI-LAMAN Mobile Application

A personal mobile account of UNI-LAMAN Group is a convenient tool for customers to execute different operations without leaving home. Developed the full application from scratch, including REST API and integration with company database data. The application has been successfully published in the Apple store and Google Play. Technologies used: JavaScript, ES6, Angular.js, Ionic.io, HTML5, CSS3, Git, PHP, Slim Framework, PostgreSQL.

JavaScript Engineer - Novartis
JavaScript Engineer - Novartis

The project is a modern SPA for data analysis and visualization that interacts with the back-end system based on Machine Learning. Worked on project development, implementing new features, fixing bugs, code reviews, application stabilization, analyzing, estimating requirements, and app release. Increased code coverage and improved code quality. Technologies used: JavaScript, ES6, React, Redux, Redux-Saga, Node.js, MySQL, Sequelize.js, HTML5, CSS3, Git, ESLint.

Front-end Developer  - Yonoton Management Tool
Front-end Developer - Yonoton Management Tool

Yonoton management tool gives users full control to manage campaigns, marketing, customer feedback, access customer big data, and manage sales. Implemented new features, fixed bugs, performed code reviews, applied layouts, and maintained app responsiveness. Updated the app design and increased stability and code quality. Technologies used: JavaScript, ES6, React, Redux, TypeScript, HTML5, CSS3, Git, ESLint, Webpack.

Education

AI for Developers With GitHub Copilot, Cursor AI & ChatGPT
AI for Developers With GitHub Copilot, Cursor AI & ChatGPT
Udemy
2025 - 2025
Master's Degree, Computer Systems and Networks
Master's Degree, Computer Systems and Networks
Odessa I.I.Mechnikov National University - Ukraine
2008 - 2013 (5 years)