01
Full-stack web apps
Modern, fast web products — React & Next.js frontends backed by Node.js & NestJS APIs over REST, GraphQL and gRPC.
drag the cloud
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Remote · Worldwide · Available
IHOR
KRAVTSOV
~$
Full-stack web
React · Node · DB
AI & pipelines
for business
Mobile apps
React Native
About
I build systems that hold up in production.
I'm Ihor — a full-stack engineer who takes ownership of the whole stack: React and Next.js on the front, Node.js and NestJS services behind them, and the databases and cloud infrastructure underneath.
I care about clean architecture, measurable impact, and code that stays maintainable as a product grows. From smart-contract integrations to AI pipelines and high-throughput microservices, I like turning fuzzy requirements into reliable, fast software.
Nothing is impossible — it just needs some time.
- Core
- React + Node.js
- Education
- MSc Computer Science
- Cloud
- AWS · Azure · GCP
- English
- Professional
What I build
From idea to production — across the stack.
02
Mobile apps
Cross-platform mobile apps that share logic with the web, shipped to both iOS and Android.
03
AI systems & pipelines
AI-powered features and data pipelines that automate real business tasks — from integration to deployment.
04
Automations & bots
Telegram and WhatsApp bots and workflow automations that remove repetitive work and connect your tools.
05
Scalable systems
Microservice architectures with clean design — DDD, SOLID and observability, deployed on the cloud with Docker & Kubernetes.
06
Web3 & smart contracts
Decentralized apps and smart-contract integrations — connecting frontends and services to on-chain logic.
Selected work
A look at the kind of products I ship.
Real projects, anonymized. Details under NDA — happy to walk through them on a call.
Web3 NDA
Web3 NFT trading platform
A decentralized platform for trading and swapping NFTs. Built the TypeScript frontend with a GraphQL data layer and connected it to on-chain logic through smart-contract integrations.
ReactTypeScriptGraphQLEthers.js
Fintech NDA
Payroll & tax platform at scale
A large HR/payroll product computing wages, taxes and deductions on a microservice architecture of 30+ services, with multiple environments. Delivered the web client and its internal component library.
ReactReduxMicroservicesMaterial UI
Health NDA
Healthcare web platform
End-to-end medical web service owned from requirements to deployment: responsive React/Next frontend, Node/NestJS APIs and a performance-tuned relational schema.
Next.jsNestJSPostgreSQL
Product NDA
Content discovery system
A system for searching and presenting rich media — video, audio, ratings and comments — with secure auth and a reusable component system across devices.
React.NETGraphQLi18n
Experience
Where I made an impact.
Illumify
Senior Full-Stack Engineer
- Cut application load time by 40% by optimizing database queries and adding API-level caching.
- Lifted registration conversion by 25% with a secure Google OAuth + JWT authentication flow.
- Reduced time-to-market for new features by 35% through CI/CD and automated testing.
- Cut production errors by 40% with logging, monitoring and code-review practices.
- Sped up the team by 15% via a unified coding style (ESLint/Prettier) and refactoring.
- Optimized AWS Lambda pipelines for better responsiveness.
LeadIntelligence
Full-Stack Engineer
- Migrated the app from a slow Webpack setup to Vite, sharply improving build and dev speed.
- Built web features integrating with a microservice architecture.
- Drove quality through code reviews and reusable, tested, efficient code.
DevBrother
Full-Stack Developer
- Connected decentralized apps to smart contracts using React libraries.
- Wrote smart-contract connectors as NestJS microservices for read operations.
- Integrated REST & GraphQL APIs across complex microservice systems.
- Implemented secure authentication and authorization (JWT, OAuth).
Medical Concilium
Full-Stack Engineer · Freelance
- Delivered end-to-end web solutions, owning the full cycle from requirements to deployment.
- Built React/Next frontends with Node/NestJS/Express APIs over PostgreSQL/MySQL.
- Deployed and maintained applications on AWS, translating business needs into technical solutions.
Stack
Tools I reach for.
Frontend
ReactNext.jsReact NativeVueTypeScriptReduxReact QueryTailwindMaterial UIFramer MotionStorybook
Backend
Node.jsNestJSExpressRESTGraphQLgRPCC# / .NETGoPython
Databases
PostgreSQLMySQLOracleMS SQLSQLiteMongoDBDynamoDBRedis
DevOps & Cloud
DockerKubernetesCI/CDAWSAzureGCPAzure DevOpsLinuxViteWebpack
Concepts
MicroservicesDDDClean ArchitectureSOLID · DRY · KISSConcurrency patternsAlgorithmsAgile / KanbanWeb3
Contact
Let's build together.
Have a project, a role, or just a hard problem? I read every message.