Dmytro Serhiienko
Test Automation EngineerAI is analyzing your overall score…
Identifying your key strengths…
Evaluating your skill match against the job requirements…
Assessing your cultural and operational fit
AI is analyzing your overall score…
Identifying your key strengths…
Evaluating your skill match against the job requirements…
Assessing your cultural and operational fit
Senior Full-Stack Developer | React · Next.js · Node.js · React Native | 6+ Years | Remote EU/US
Senior Full-Stack & Mobile Developer with 6+ years building and shipping production-grade web and mobile applications — from zero-to-launch startups to multi-platform enterprise systems. I've spent the last 6+ years at two Ukrainian product companies (Sombra and Lemberg Solutions), progressing from Junior to Senior while shipping real-world features used by real users. I've owned full delivery cycles — architecture decisions, API design, mobile releases, cloud infrastructure,and team mentorship. What I actually build: → React / Next.js frontends with SSR, performance optimization, and clean UX → Node.js / Express / GraphQL backends with complex business logic and secure auth (JWT, RBAC, refresh token rotation) → Cross-platform iOS & Android apps via React Native + Expo, shipped through TestFlight and Google Play → Cloud infrastructure on AWS (S3, EC2, CloudFront, RDS, Lambda) and Firebase → Real-time systems with WebSockets and Socket.IO Beyond the technical: I bring full ownership culture, async-first communication (I've worked hybrid and remote), and the judgment to make the right call — not just the clever one. Stack: React · Next.js · TypeScript · Node.js · Express · GraphQL · React Native · Expo · PostgreSQL · MongoDB · AWS · Docker · Firebase · WebSockets · Redux · CI/CD 📩 Open to senior full-stack and mobile engineering roles — let's talk.
Ivan Franko National University of Lviv
Bachelor, Computer Science
N/A – Present
Ivan Franko National University of Lviv
Master’s Degree, Computer Science
N/A – Present
Lemberg Solutions
Senior Full-Stack Developer (Web & Mobile)
January 1, 2023 – May 1, 2026
Lviv, Ukraine · Hybrid
Sombra
Middle Full-Stack Developer
January 1, 2021 – January 1, 2023
Lviv, Ukraine · Hybrid
Sombra
Junior Full-Stack Developer
January 1, 2020 – January 1, 2021
Lviv, Ukraine · Hybrid
Front-End Developer
Meta
June 23, 2026 – Present
Back-End Developer Professional Certificate
Coursera
June 23, 2026 – Present
Cultural Fit Analysis
The candidate has a consistent career progression within full-stack development, demonstrating commitment and growth. Their experience across multiple client projects at Sombra and leading end-to-end delivery at Lemberg Solutions indicates adaptability and a broad exposure to different technical challenges. While the target role is 'Test Automation Engineer', the candidate's background is primarily in full-stack development. This represents a significant pivot, and while their development experience is strong, direct experience in test automation frameworks, strategies, and tools is not evident in the provided data. This lack of direct alignment with the target role's core responsibilities suggests a moderate cultural fit for a dedicated test automation position without further evidence of interest or experience in that specific domain.
Soft Skills & Operational Fit
The candidate's experience descriptions highlight leadership in feature delivery, mentorship, and active participation in Agile ceremonies, indicating strong collaboration and communication skills. Their progression from Junior to Senior Full-Stack Developer suggests a proactive and growth-oriented mindset. The focus on reducing time-to-feature delivery, improving API response times, and reducing infrastructure incidents points to a results-driven approach.