Transition management
A successful transition depends on securing repository documentation and establishing clear acceptance criteria with the replacement engineer from Day 1.
Ensure the outgoing developer commits all local branches and documents environment variables.
Incoming senior engineer audits architecture quality and sets realistic completion estimates.
Transition deployment access and begin sprint execution with verified deliverables.
The instinct when a developer is underperforming is to end it and then find a replacement. Doing it in that order costs you the handover, which is the most valuable thing the outgoing developer still has.
Where the relationship is merely disappointing rather than broken, ask for a paid handover session first: a walkthrough of the code, the deployment process, and the known problems. A few hours of that saves the incoming engineer days.
Ask for these specifically, in writing, and ideally before the final payment.
Where it is possible, a short overlap between the outgoing and incoming developers is the cheapest insurance available. Even two hours of direct conversation transfers context that would otherwise take the new person a week to reconstruct.
This requires the exit to be handled without hostility, which is a practical argument for keeping the tone civil even when the work has been poor.
The incoming engineer will find things wrong, and will say so. Some of that is accurate and useful; some is the ordinary reflex of a professional encountering unfamiliar decisions.
The way to tell them apart is to ask what each problem costs you if it stays. A real issue has a consequence you can understand — this makes changes slow, this will break at that volume, this leaks data. A stylistic objection does not.
Arrange the handover first where the relationship allows it. A paid walkthrough from the outgoing developer saves the incoming one days, and that is only possible while things remain civil.
Partly, usually. Ask what each problem costs you if it stays. Real issues have a consequence you can understand; stylistic objections do not survive that question.
Khmelnytskyi, Ukraine
Full-Stack Developer — Websites, Apps, Servers, Databases, AI, SEO & QA
Full-stack developer working across the entire stack — websites, apps, servers, databases, AI integrations, SEO, and QA. Languages & Core: writes code in JavaScript, TypeScript, Python, PHP, Go, and Rust. Architects scalable systems for large-scale projects. Frontend & Interfaces: builds websites and web applications with React and Next.js. Crafts responsive interfaces with Tailwind CSS, Radix UI and Shadcn, adds smooth animations with Framer Motion, and interactive charts with Recharts. SEO Audit & On-Page Optimization: semantic keyword research, resolving technical indexing issues, and optimizing page load speeds. Structures page architecture, meta tags, and multi-language support (i18n). Copywriting & Content Strategy: writes technical articles, drafts precise content briefs for writers, and develops content plans. QA & Testing: full-cycle testing for websites, web services, and Android apps — manual QA for UI/UX and business logic, plus automated testing with Jest, Vitest, Playwright and E2E. Backend, Cloud & Databases: complex API integrations of any scale. Builds servers with Node.js (Express, Fastify). Works with PostgreSQL, MySQL and MongoDB, ORMs (Prisma, Drizzle), and cloud infrastructure (Supabase, Firebase, Cloudflare). Browser Extensions & Automation: develops Manifest V3 browser extensions for Chrome, Edge, Firefox and other browsers. Builds web scrapers for complex data extraction using Puppeteer and Playwright. AI & Intelligent Agents: builds custom AI agents and integrates LLMs from OpenAI, Google Gemini, and Anthropic Claude via API, including Claude Code setups. Servers & DevOps: Linux (Ubuntu) and VPS administration — setup, updates, real-time monitoring, secure process isolation, Nginx, PM2, and CI/CD deployment via GitHub Actions. Telegram Bots: develops advanced Telegram bots (Telegraf, Grammy) integrated with AI, payment gateways, Google Sheets, and crypto exchanges. Desktop Applications: builds cross-platform software for Windows and macOS using Electron and Rust. Additional expertise: site development and customization with WordPress and Astro.
Senior Frontend Engineer · React · Next.js · Angular | Open to new opportunities
Senior frontend engineer with deep experience across React, Next.js and Angular, building enterprise dashboards and complex UI systems. Strong focus on performance, component architecture and design-to-code fidelity.
