Open to opportunities

Kostiantin Troianivski

@kostiantintroianivsk

Senior Full Stack Engineer building and scaling production apps with React, Node.js, and data-driven performance improvements.

Romania

Message

What I'm looking for

I’m looking for a team where I can lead full-stack delivery end-to-end—shipping customer-facing features, improving system reliability, and optimizing performance with modern React/Node.js, strong data practices, and pragmatic CI/CD.

I’m a Senior Full Stack Engineer with over 8 years of professional experience delivering and scaling production applications. I’m proficient in React and Node.js across frontend and backend development, and I pair it with strong database and caching fundamentals (Redis, SQL/NoSQL) to keep high-traffic systems reliable.

Most recently, I led development of a customer-facing analytics platform serving thousands of users, using React and Next.js with server-side rendering to improve SEO and performance. I’ve also migrated legacy PHP backends to Node.js with TypeScript and PostgreSQL, optimized queries and indexes to reduce request times, and implemented event-driven reliability with Redis caching and RabbitMQ—along with CI/CD using GitHub Actions and Jenkins—to support faster, safer releases.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

Netguru

Nov 2023 - Nov 2025 (2 years)

Led development of a customer-facing analytics platform used by thousands of users, building a SEO-friendly React/Next.js frontend with server-side rendering. Migrated a legacy PHP backend to Node.js with TypeScript and PostgreSQL, optimizing queries and indexes to handle peak traffic and reduce request times.

React Next.js TypeScript PostgreSQL GraphQL RabbitMQ Docker NodeJS

Full Stack Engineer

Dashbouquet Development

Oct 2019 - Nov 2023 (4 years 1 month)

Developed a user management dashboard using React and Next.js, improving SEO and initial page load times for an e-commerce platform with server-side rendering. Built and optimized Node.js REST APIs, integrated third-party payments and shipping services, and tuned PostgreSQL performance with indexing and query refactoring.

React Next.js Node.Js PostgreSQL CI CD GitHub Actions Docker Kubernetes REST APIs AWS NodeJS

Junior Developer

VOIS Romania

Jul 2017 - Sep 2019 (2 years 2 months)

Contributed to building and maintaining web features using JavaScript and React, implementing UI updates with Material UI and Tailwind CSS. Assisted with REST endpoints in Node.js and Java, resolved bugs, added unit tests, and supported SQL-based reporting and data validation tasks.