faster build time
after application modernization
Open to international remote opportunities.
Frontend Engineer building complex, fast and maintainable web products.
I have 4.5+ years of commercial experience with React, Next.js and TypeScript. I focus on frontend architecture, performance, real-time interfaces and AI-powered developer tools.
React · Next.js · TypeScript · Frontend Architecture · Performance · WebSocket · AI Engineering
Engineering impact
Measured improvements, with context.
Performance work is most useful when the baseline, intervention and limitation are all visible.
Commercial work
smaller JavaScript payload
through splitting and dependency optimization
application loading
in a transport monitoring platform
Independent performance study
Lighthouse Performance
in a measured React-to-Svelte migration
JavaScript bundle
in the same migration experiment
Commercial metrics are based on internal project measurements and are described without exposing confidential implementation details.
Selected work
Systems, not just screens.
Independent projects with working demos, source code and the engineering decisions behind them.
01 / AI-assisted pull request review workflow
ReviewPilot AI
A Next.js application and GitHub App that converts unified diffs into structured review feedback, file-level risk, line-aware findings, test suggestions, confidence scores and merge recommendations.
- Contribution
- Product design, frontend architecture, GitHub integration and evaluation workflow
- Engineering result
- A complete review pipeline with validated, provider-independent structured output.
02 / Modernizing a browser-based WebAssembly game runtime
Diablo Web
A compatibility and architecture modernization of existing open-source browser and game-engine work, with typed runtime orchestration around WebAssembly, workers, canvas and browser storage.
- Contribution
- Frontend modernization, runtime boundaries, protocol validation, tests and delivery
- Engineering result
- A maintainable browser runtime shell with explicit boundaries around engine, worker and UI concerns.
03 / Real-time logistics monitoring interface
Fleet Route Monitor
A responsive operational dashboard that turns deterministic vehicle simulation into route progress, ETA, delay risk and actionable alerts.
- Contribution
- Interaction design, simulation model, map integration and testable operational state
- Engineering result
- A credible, repeatable monitoring experience without depending on a live fleet backend.
04 / Measured React-to-Svelte performance migration
Forest
An engineering experiment that measures the effect—and limits—of migrating the application layer from React to Svelte while keeping the image payload constant.
- Contribution
- Migration implementation, measurement design, analysis and documentation
- Engineering result
- 74% less JavaScript and a measured Lighthouse Performance increase from 75 to 92.
Experience
Modernization under real product constraints.
February 2025 — Present
Media Service
Frontend Engineer
Working on large-scale cultural and educational digital platforms, including public-facing and internal administrative products.
- Next.js and React platform modernization
- JavaScript-to-TypeScript migration
- Frontend architecture and module boundaries
- SSR, routing, bundle and Core Web Vitals optimization
- Reusable component systems
- Code review, mentoring, CI and testing improvements
February 2022 — February 2025
Logrocon
Frontend Engineer
Built and modernized enterprise products for banking, logistics, retail, monitoring and operational workflows.
- React and TypeScript modernization
- Real-time WebSocket interfaces
- Leaflet transport monitoring and JointJS diagram editors
- Webpack-to-Vite migration and monorepo development
- Legacy system refactoring and performance optimization
Client names and confidential implementation details are intentionally omitted.
About
Complexity made understandable.
I enjoy working on frontend systems where interface complexity, performance, architecture and product logic meet. My strongest work usually involves modernizing existing applications, creating clear boundaries around complex state, improving delivery workflows, and making systems easier to understand and maintain.
Alongside commercial development, I build AI-assisted engineering tools and explore browser technologies such as WebAssembly, WebGL and real-time communication.
Contact
Have a complex frontend problem or an international role that could be a good fit?
john.maks595@gmail.comAstana, KazakhstanUTC+5Open to international remote opportunities.