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serhii_halenko

Serhii

@serhii_halenko

Full Stack Developer and Telegram Bot Expert

Ucrânia
Ucraniano, Inglês, Russo
Algumas informações são exibidas no idioma inglês.
Sobre mim
Full-Stack Web & Mobile Developer specializing in React, Next.js, React Native, Expo, Node.js, Python, PostgreSQL, and MongoDB. I build fast MVPs and scalable production-ready apps with clean architecture, strong UX, testing, and clear documentation. Reliable deadlines, transparent communication, and full ownership from idea to launch. Projects include TimeLeft, TripMate, JobMatcher, logistics route optimization, and WinForms audio tools. ... Saiba mais

Habilidades

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serhii_halenko
Serhii
offline • 
Tempo médio de resposta: 1 hora

Conheça meus serviços

Chatbots baseados em regras
I will build a professional custom telegram bot in python
A partir deUS$ 35 /projetoMais detalhes
Desenvolvimento de chatbots de IA
I will build an ai telegram bot with chatgpt python and automation
A partir deUS$ 65 /projetoMais detalhes

Portfólio

Experiência profissional

Senior Full-Stack Developer

DigitalDepthSoft • Período integral

May 2024 - Jul 2026 • 2 yrs 2 mos

Worked on a wide range of software development tasks using Python and JavaScript, taking ownership of features from initial planning to production deployment. My responsibilities included designing application architecture, developing backend services and APIs, building frontend functionality, integrating third-party services, working with databases, debugging complex issues, optimizing performance, and maintaining existing systems. I regularly worked with Python for backend development, automation, APIs, data processing, and Telegram bot development, while JavaScript was used for frontend applications, business logic, integrations, and full-stack solutions. I was also responsible for: * Designing clean and scalable application architecture * Developing and maintaining REST APIs * Building automation tools and Telegram bots * Working with PostgreSQL, MongoDB, and SQL databases * Integrating payment systems and third-party APIs * Reviewing and refactoring existing code * Investigating and fixing complex production issues * Improving application performance and stability * Writing reusable and maintainable code * Making technical decisions independently * Breaking large requirements into development tasks * Supporting projects from development through deployment * Collaborating with developers and helping solve technical problems I worked across multiple projects with different requirements and technologies, which gave me strong experience in quickly understanding unfamiliar codebases, solving complex technical problems, and delivering reliable production-ready solutions.