Open to opportunities

Edgar Buchek

@edgarbuchek

Message

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

Slovakia

Message

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.

I’m a Full Stack Engineer with 10 years of experience building scalable web platforms, AI-powered applications, and cloud-native systems. I’ve delivered end-to-end projects by designing maintainable system architecture and integrating AI/LLM capabilities into production-grade backends using React, Next.js, Node.js, FastAPI, Django, Java, and Spring Boot.

I’m especially strong in owning delivery, optimizing performance, and making technical decisions that improve reliability and scalability. In recent work, I integrated LLMs (OpenAI) and automated workflows with LangChain, reduced manual work by 40% and improved efficiency by 35%, and helped teams ship faster in Agile/Scrum; I also improved uptime to 99.9% on enterprise deployments and achieved 30% cloud cost savings through AWS optimizations.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

Digicode

Jul 2022 - Jan 2026 (3 years 6 months)

Developed secure REST APIs and role-based access control for a healthcare application using Node.js/NestJS, improving response reliability for high-volume operations. Integrated OpenAI via FastAPI to reduce manual work by 40% and used LangChain to cut manual task management by 35%, while improving fintech scalability and reducing latency by 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)

Researched and debugged legacy Angular enterprise systems used by 1,000+ clients, improving usability scores by 25%. Built Java/Spring Boot back-end services and Azure deployment improvements that reduced processing time by 40% and increased system uptime to 99.9%, with API response time improved by 35%.

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 development of a secure healthcare system with Python/Django, reducing vulnerabilities by 25%. Built an AI/ML document analysis legal platform improving accuracy by 30%, migrated a legacy frontend to React/Next.js reducing load times by 40%, and optimized AWS infrastructure (S3/RDS/Lambda) to reduce monthly cloud costs by 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 and optimized a social platform UI with Angular, increasing user retention by 30% within the first six months. Implemented responsive pages with React (reducing design-to-development time by 40%), developed Node.js/Express back-end services for a time-tracking SaaS (reducing manual administrative effort by 25%), and improved CI/CD with GitHub Actions to cut deployment time by 50%.

Angular React Node MongoDB CI CD Git GitHub Actions Responsive Design