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Edgar Buchek

@edgarbuchek

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Senior full-stack engineer building scalable web platforms and AI-powered cloud-native systems.

Slovakia

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What I'm looking for

I’m looking for a senior role where I can own end-to-end delivery, shape architecture, and integrate AI/LLM features into scalable React/Node and Python backends in a cloud-native environment with strong product collaboration.

Full Stack Engineer with 10+ years of experience building scalable web platforms, Al-powered applications, and cloud-native systems using React, Angular, Node.js, Django, and Spring Boot. Strong background across frontend architecture, backend APIs, database design, and modern cloud environments including AWS, Azure, and containerized deployment workflows. Proven senior-level strength in owning end-to-end delivery, designing maintainable system architecture, integrating AI/ LLM capabilities, and driving technical decisions that improve product performance and scalability. Experienced working across time zones with cross-functional product, design, and engineering teams, with strong communication in Agile delivery environments. Comfortable contributing in both fast-moving startup teams and structured enterprise organizations.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

Digicode

Jul 2022 - Jan 2026 (3 years 6 months)

Led full-stack dev (React/Next.js, Node/NestJS) for healthcare; built secure APIs with RBAC, boosting reliability. Integrated OpenAI LLMs via FastAPI, cutting manual work 40%. Applied LangChain automation (-35% tasks). Designed REST/GraphQL APIs and microservices (Kafka/RabbitMQ), reducing latency 25%.

Node NestJS RESTful APIs Role Based Access Control fastAPI Lang Chain System Architecture Mentoring Agile Scrum

Full Stack Engineer

Rare Crew

Nov 2020 - Jun 2022 (1 year 7 months)

Improved legacy Angular systems for 1K+ users, boosting stability and UX (+25%). Built scalable Java/Spring Boot backends, cutting processing time 40% and API latency 35%. Deployed on Azure, achieving 99.9% uptime and reliable frontend-backend integration.

Angular Java Spring Boot Azure Performance Optimization API Development Troubleshooting Enterprise Systems

AI/ML Engineer

Sudolabs

Jul 2018 - Oct 2020 (2 years 3 months)

Led secure Django-based healthcare system, reducing vulnerabilities 25%. Applied AI/ML (TensorFlow, NumPy, Pandas) to improve document analysis accuracy 30%. Migrated legacy frontend to React/Next.js, cutting load times 40%. Optimized PostgreSQL (-20% query time) and AWS (S3, RDS, Lambda) infrastructure, reducing costs 30%.

Python Django TensorFlow NumPy Pandas PostgreSQL React Next.js S3 Lambda Data Security

Web Developer

Software Planet Group

Oct 2016 - Jun 2018 (1 year 8 months)

Built Angular-based social platform, increasing retention 30%. Developed responsive React UIs, accelerating delivery 40%. Created Node.js/Express backends for SaaS and travel systems, improving data efficiency 25%. Engineered MongoDB data handling for reliability. Streamlined CI/CD with GitHub Actions, reducing deployment time 50%.

Angular React Node MongoDB CI CD Git GitHub Actions Responsive Design