Kostiantin
Full stack developer, 100 000 грн
Контактная информация
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Опыт работы
Senior Fullstack Developer
с 11.2021 по 11.2025
(4 года)
Netguru, Remote (IT)
- Built a customer-facing analytics SaaS serving ~18k monthly users, developing the frontend with React/ Next.js and adding server-side rendering (SSR) to improve SEO and reduce initial page load times.
- Migrated a legacy PHP reporting backend to NestJS (TypeScript) with PostgreSQL, optimizing queries, adding indexes, and resolving long-running requests under peak traffic.
- Developed internal admin tools with Vue.js, enabling operations teams to manage and update data without manual spreadsheets.
- Designed and maintained REST and GraphQL APIs for web and mobile clients, ensuring backward compatibility, handling breaking changes, and managing staged rollouts.
- Improved system performance and reliability by adding Redis caching and background processing with RabbitMQ, reducing synchronous request failures during traffic spikes.
- Deployed services on AWS (EC2, RDS, S3) and later containerized with Docker and Kubernetes, resolving autoscaling and health-check issues in production.
- Established CI/ CD pipelines using GitHub Actions and Jenkins, reducing deployment errors and rollback times to under 10 minutes.
- Built a nightly data synchronization service with FastAPI (Python), storing results in PostgreSQL and Elasticsearch to support reporting without impacting production traffic.
- Optimized PostgreSQL and MySQL performance using connection pooling, read replicas, and query tuning, reducing p95 latency under load.
- Applied Domain-Driven Design (DDD) and Clean Architecture when decomposing a growing monolith into smaller services, improving maintainability and developer onboarding.
- Mentored junior full-stack developers through code reviews, pair programming, and architecture guidance, improving code quality, delivery speed, and team best practices adoption.
Full Stack Developer
с 10.2017 по 11.2021
(4 года 2 месяца)
Dashbouquet Development, Remote (IT)
- Developed and deployed a user management dashboard with React and Next.js, introducing server-side rendering (SSR) to improve SEO and reduce initial page load times.
- Built RESTful APIs with NestJS and Node.js to manage user authentication, user profiles, and CRUD operations on product data, while I was developing an e-commerce marketplace platform.
- Optimized PostgreSQL queries by adding indexes to frequently queried fields and refactoring slow-performing SQL commands.
- Integrated third-party APIs (payment gateways and shipping services), resolving common integration issues like mismatched data formats and authentication failures.
- Set up and maintained CI/ CD pipelines with GitHub Actions.
- Collaborated with the design team to implement responsive UIs using Tailwind CSS and Material UI.
Web developer
с 07.2014 по 09.2017
(3 года 3 месяца)
VOIS, Other countries (IT)
- Built and maintained small web features using JavaScript/ TypeScript and React.
- Implemented basic REST endpoints in Java/ Spring Boot and Node.js/ Express under guidance from senior engineers.
- Fixed bugs and delivered minor enhancements based on QA and product tickets.
- Added unit tests and updated API documentation to support QA and smoother releases.
- Worked with SQL queries for simple reports, data fixes, and validation tasks.
Образование
University POLITEHNICA of Bucharest
Information Technology, Other countries
Высшее, с 2010 по 2014 (4 года)
Bachelor's degree in Information Technology
Дополнительное образование и сертификаты
Нет дополнительного образования и сертификатов.
Знания и навыки
- JavaScript
- TypeScript
- Python
- PHP
- C#
- Java
- Material UI
- Tailwind CSS
- Next.js
- AngularJS
- Vue.js
- Nuxt.js
- Spring boot
- NestJS
- FastAPI
- Django Rest Framework
- Laravel
- React Native
- Flutter
- Android SDK
- GraphQL
- PostgreSQL
- MongoDB
- Elasticsearch
- Kibana
- AWS
- Google Cloud Platform
- CI/CD
- Microservices
- WebSocket
- Golang
- C/C++
Знание языков
- Английский — свободно
- Румынский — свободно
Дополнительная информация
My goal is to join a strong team where I can grow, take ownership, and deliver real results. I’m highly motivated to build long-term success in my work and contribute to the company’s goals as much as possible.
I always try to think from the company’s side: what brings value, improves the product, and strengthens the team.
telegram: @Dev_K_T
Whatsapp: [
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