Mateusz Wielgosz
Helping teams ship resilient backend systems faster with AI-assisted engineering.
Senior Java Backend Engineer | Spring Boot | Microservices | AWS | AI
10+ years in production engineering
Fintech and insurance domain depth
High-load real-time systems
Java 17+
Spring Boot
ReactAWS + Kubernetes
AI-Assisted Engineering
I am a Senior Java Backend Engineer with 10+ years of experience delivering high-availability systems in fintech and insurance. I build and scale Spring Boot microservices on AWS/Kubernetes, optimize performance and reliability, and use AI tools like Claude Code, Kiro, and Amazon Q to accelerate delivery with quality.
How I Create Value
- Backend Architecture & Delivery: Design and implementation of production-critical Java/Spring microservices with strong ownership in you-build-it-you-run-it environments.
- AI-Accelerated Engineering: Practical use of AI coding assistants for faster implementation, safer refactoring, better documentation, and higher developer throughput.
- Technical Leadership & Hiring: Mentoring, onboarding, and technical interviewing for Java/Spring/React roles to strengthen engineering teams.
Contact & Collaboration
Call Now +48 780 059 055
Send Email mtmwielgosz@gmail.com
Download CV (PDF) Mateusz-Wielgosz-CV.pdf
LinkedIn: Mateusz Wielgosz Professional profile
Remote-friendly collaboration. Typical response within one business day.
How I Use AI in Delivery
- Accelerate backend implementation with AI-assisted coding while preserving architecture and domain constraints.
- Use AI for safer refactoring and migration planning, then verify changes with tests and production-grade review.
- Generate technical documentation, API drafts, and onboarding materials to reduce team ramp-up time.
- Apply AI as an engineering multiplier, not a replacement: every output is validated for reliability and maintainability.
Experience Highlights
Real-Time FinTech
High-load microservices delivery for thousands of concurrent users with production ownership.
Enterprise Finance
Modular leasing and financial workflows with robust integrations and reliable releases.
Insurance Platforms
Architecture modernization, team coordination, and strong testing strategy across multiple projects.
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