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Alexey K - cover
Alexey K

Alexey K

Senior Full-Stack Developer, Tech Lead & AI Engineer | TypeScript, Node.js, React, AWS
📍 Minsk, Belarus · (0) · Member since October 2026
Availability
🏠 Works remotely / from home Yes No
🧰 Travels to client Yes No
⚡

Presentation

I build production-grade web products end-to-end — from architecture and API design to frontend, cloud infrastructure, and launch. 8+ years in IT, with deep experience in FinTech, logistics, and AI products.

What I do:

Full-stack development: TypeScript, Node.js/Nest.js, React/Next.js, PostgreSQL, MongoDB, GraphQL, REST

Cloud & DevOps: AWS (Lambda, ECS, DynamoDB, Cognito, CDK), Docker, CI/CD, serverless and microservice architecture

AI engineering: LLM-powered workflows, agent orchestration, RAG, voice pipelines (STT–LLM–TTS), AI integrations

Architecture: Domain-Driven Design, Clean Architecture, event-driven and high-load systems

Payments & integrations: Stripe (subscriptions, webhooks, disputes), third-party APIs, KYC flows

What sets me apart:
I don't just write code — I take ownership of the outcome. As a Tech Lead, I've managed teams, hired and mentored engineers, built processes and standards, and owned delivery from idea to production. I can work solo, lead a team, or step in as a technical lead when a project needs direction — communicating directly with stakeholders and translating business goals into working systems.

I'm comfortable moving fast without breaking things — shipping MVPs quickly, then hardening them for scale. And I use AI tools daily, which means I deliver faster without sacrificing quality.

Good fit for:

Startups needing an MVP built fast and right

Companies needing a senior engineer or tech lead to own a system end-to-end

Teams needing AI integration, automation, or technical direction

Projects requiring architecture decisions and delivery ownership, not just implementation

Available for project-based or ongoing work. Let's build something that works.
🛠️

Offered services

10 services
🩺
Hourly senior full-stack development — TypeScript, Node.js, React, AWS
Flexible hourly engagement for any stage — new features, bug fixing, integrations or scaling. Senior-level work, no hand-holding needed.
36 $ Per hour
📚
I will build your Next.js frontend from Figma designs — pixel-perfect and fast
Clean, responsive, accessible UI built exactly to your designs. Fast, maintainable and ready for production.
6000 $
🔬
I will act as your Tech Lead — architecture, code reviews and team mentoring
Technical leadership on demand: architecture decisions, code reviews, mentoring and delivery ownership. For teams that need direction.
63 $ Per hour
🖌️
I will review and refactor your legacy codebase for performance and scale
Deep code audit, bottleneck analysis and refactoring. I find what's slowing you down and fix it without breaking what works.
1000 $
📌
I will integrate Stripe payments, subscriptions and webhooks into your app
Subscriptions, recurring billing, paywalls, webhooks and dispute handling. Secure payment flows built for real business.
1000 $
📐
I will set up your AWS serverless infrastructure with CDK and CI/CD
Infrastructure as code, serverless architecture, automated deploy pipelines and monitoring. Cost-efficient and built to scale.
1500 $
💼
I will integrate AI, LLM agents and RAG into your existing product
Production-grade AI features — agent orchestration, RAG pipelines, LLM integrations and human-in-the-loop. Not a demo, a working system.
1500 $
🪜
I will design and build a scalable REST or GraphQL API for your product
Clean API design with proper contracts, auth, validation, versioning and docs. Built for performance, security and easy integration.
1000 $
📦
I will architect and build your SaaS MVP from scratch to launch
From blank repo to working product. I design the architecture, build the core, and get you to launch fast — without technical debt that blocks growth.
6000 $
🧰
I will build your production-ready web app in TypeScript, Node.js and React
End-to-end web app development — architecture, backend, frontend, database and deployment. Built to scale, not just to demo.
1000 $
🕐

Working hours

Monday
From08h00To18h00
Tuesday
From08h00To18h00
Wednesday
From08h00To18h00
Thursday
From08h00To18h00
Friday
From08h00To18h00
Saturday
Closed
Sunday ▪ Today
Closed
⭐

Reviews

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