Open to opportunities

Dmitry Kovalevich

@dmitrykovalevich

Message

Senior Frontend Engineer building AI-driven MarTech products with end-to-end ownership and real-time collaboration.

Poland

Message

What I'm looking for

I’m looking to build AI-driven MarTech products with high autonomy and end-to-end feature ownership. I want to work on real-time collaborative UX and scalable frontend architecture, translating complex product goals into maintainable systems.

I’m a Senior Frontend Engineer with 6+ years of experience building AI-driven MarTech products in fast-paced startups. I like owning features end-to-end—from architecture through release—and turning complex product needs into scalable technical solutions.

Most recently, I shipped an AI GTM platform from MVP to launch, including real-time collaborative interfaces with an integrated LLM-powered chat. At OLSYS, I architected and built a unified content platform with a WYSIWYG editor, an LLM prompt grid, and an AI chat synchronized in real time via WebSockets, plus a dynamic UI rendering engine delivered in 3 weeks.

I also enjoy leading teams and improving delivery quality: I grew from sole fullstack engineer to Frontend Tech Lead by scaling the team from 1 to 4, running 10+ interviews, and establishing code review and development standards. Earlier roles include building interactive UNICEF campaign experiences, automating AT&T GIF production with a Node.js CLI, and creating a Figma plugin that cut static ad production time by 90% while driving subscription revenue via Stripe.

Experience

Work history, roles, and key accomplishments

Current

Senior Fullstack Engineer

Current

OLSYS Poland

Sep 2023 - Present (2 years 10 months)

Architected and built a unified AI content platform with a WYSIWYG editor, LLM prompt grid, and integrated AI chat, synchronized in real time via WebSockets. Built real-time collaborative editing and a dynamic UI rendering engine, then grew into Frontend Tech Lead while maintaining/refactoring the Express.js layer during a Spring Boot backend migration.

TypeScript React PostgreSQL Prisma Vite TailwindCSS Zustand Redux toolkit React Hook Form Zod React Flow Tiptap PostHog Vitest React Testing Library WebSockets

Fullstack Developer

DELVE Poland

Nov 2020 - Aug 2023 (2 years 9 months)

Developed 10+ interactive components and animations for an award-winning UNICEF campaign, improving user engagement and CTR. Built tools to automate GIF asset production (AT&T) and static ad creation (Figma plugin), optimized performance (Lighthouse 75 to 92), and led migration of a major client’s 60K+ asset library with no service disruptions.

TypeScript React Redux toolkit Ant Design SCSS TailwindCSS Next.js MongoDB Google Apps Script Selenium Figma Webpack GSAP3 SVG Stripe

On-site Frontend Developer

DELVE Belarus

Nov 2019 - Oct 2020 (11 months)

Developed interactive banner ad units and web applications using JavaScript, GSAP3, and Canvas. Built internal Node.js tooling to automate repetitive asset preparation for the design team, and refactored legacy projects using modern ES6+ practices and a component-based architecture.