Open to opportunities

oleksandr fedunec

@oleksandrfedunec

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Senior Full Stack Engineer specializing in React, Golang, and AI-integrated cloud-native systems.

Czechia

Message

What I'm looking for

I seek senior engineering roles building cloud-native, AI-integrated systems with strong emphasis on clean architecture, TDD, mentorship, and scalable CI/CD.

I am a Senior Full Stack Engineer with 10+ years delivering enterprise-grade software across ERP, AI, IoT, e-commerce, and fintech sectors, specializing in React, Golang, and Python. I build secure, scalable microservices, robust APIs, and AI-integrated systems in cloud-native environments (AWS, Azure) while advocating TDD, clean architecture, and performance optimization.

My recent work includes designing ERP microservices, integrating OpenAI APIs for document summarization and anomaly detection, and deploying hybrid cloud infrastructure with Kubernetes and Terraform. I mentor teams, lead code reviews, and implement CI/CD pipelines to accelerate delivery while maintaining high test coverage and system reliability.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

Key Development

May 2023 - Feb 2026 (2 years 9 months)

Designed and developed ERP microservices in Golang and PostgreSQL and built AI-powered Next.js dashboards, improving API responsiveness and enabling real-time IoT data sync across the ERP network.

Golang PostgreSQL Next.js React GraphQL Redis Kafka Docker Kubernetes

Senior Full Stack Developer

Onectus Technologies

Sep 2020 - Apr 2023 (2 years 7 months)

Built a responsive fintech platform with React and Next.js and developed backend services in Django and Golang, introducing Go microservices for high-throughput payment processing and integrating ML pipelines for personalized credit scoring.

React Next.js Django Golang PostgreSQL Kafka Docker Terraform PyTorch

Full Stack Engineer

Siesta Labs

Jun 2017 - Aug 2020 (3 years 2 months)

Developed React/TypeScript frontends and refactored monolithic backends into Django and FastAPI microservices, delivering a 30% increase in user engagement and reducing frontend latency by 25% via real-time updates.

React TypeScript Django fastAPI WebSockets AWS Lambda Pytest Celery Azure

Full Stack Engineer

Profiq

Jan 2014 - May 2017 (3 years 4 months)

Led integration of Go microservices for ETL and eCommerce workflows, optimized PostgreSQL performance, and implemented OWASP-compliant security, achieving high test coverage and improved telemetry visibility.

Golang Gin PostgreSQL WebSockets Terraform Azure REST APIs CI CD

Education

Degrees, certifications, and relevant coursework

Czech Technical University in Prague

Bachelor of Science, Computer Science

2010 - 2014

Completed a Bachelor's degree in Computer Science with coursework and projects covering software engineering, algorithms, and systems development from September 2010 to June 2014.