Máté Herczeg

Máté Herczeg

Senior Full-Stack Engineer · AI-Orchestrated Development

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Summary

Senior full-stack engineer with deep enterprise React, Angular, and Next.js background, now focused on AI augmented development including agent loop design, prompt engineering, and integrating LLMs into real applications. Available for EU/UK/US remote contracts; based in Budapest.

Experience

Self-employed · Independent engineering R&D

Founder
Feb 2025 – Present · Budapest, HU

  • Solo R&D at the intersection of AI tooling and game development. Built and operate an AI dev orchestrator that drives Claude Code agents through spec-decomposed tasks, shipping feature work on a Godot game from human-authored specs.

Stack: Claude API, Claude Code, local LLMs, bash, GitHub CLI, Godot, GDScript

Erste Bank

Frontend Engineer · Contract
Nov 2021 – Dec 2024 · Remote

  • Owned frontend implementation on a 10-person full-stack team building a corporate-banking permission management module; shipped the module across Austria, Romania, and Czechia on a country-per-year cadence with maintenance for prior markets.
  • Implemented features and authored their step definitions in the team’s Cypress/Cucumber end-to-mock suite; supported the QA function on test design. The team’s coverage discipline kept production incidents at ~1/4 the bank’s cross-team average.

Stack: React, TypeScript, Redux Toolkit, Cypress, Cucumber, REST APIs

Diesdas Digital

Frontend Engineer · Contract
Mar 2021 – Jul 2021 · Remote

  • Built a custom conversational UI for a chatbot product, partnering with their lead engineer and UI/UX designer.

Stack: Angular, TypeScript, RxJS

Charly Education

Lead Frontend Engineer · Contract
Oct 2020 – Mar 2021 · Remote

  • Stepped in after the FE tech lead’s departure with a two-part mandate: ship the new e-learning platform before the next university exam window (only two such windows per year, so missing it meant a 6-month slip) and prepare the in-house mid-level engineer to take over the Lead role.
  • Shipped on time; handed Lead off cleanly to the mid-level engineer on rollout.

Stack: React, Next.js, TypeScript, Cypress

SimpledCard

Lead Frontend Developer · FT → B2B handover
Aug 2019 – May 2020 · Budapest, HU

  • Led the AngularJS → Angular migration of the main application; mentored the mobile team through their NativeScript rewrite.

Stack: Angular, NgRx, TypeScript, NativeScript

Cloudera

Software Engineer
May 2019 – Jul 2019 · Budapest, HU

  • Short engagement on the ML platform frontend post-Hortonworks merger.

Stack: React, AngularJS, Redux, Node.js, Jest, Kubernetes, Python

IT Ware

Senior Frontend Developer
Feb 2019 – Mar 2019 · Budapest, HU

  • Built the frontend for a new ML product and stood up the GitLab CI/CD pipeline.

Stack: Angular, NgRx, TypeScript, Docker, GitLab CI/CD

Hearsay Systems

Senior Frontend Developer
May 2018 – Jan 2019 · Budapest, HU

  • Built custom UI extensions on a CMS used by enterprise clients.

Stack: React, JavaScript, Node.js, AWS, Jest

Earlier experience (2010 – 2017)

Full-stack and frontend engineering across e-commerce, education, and consumer apps. Shifted to frontend specialization at T.E.L.L. Software (2016) where I picked up automated testing and XP practices. Detailed history available on request.

Skills

Languages: TypeScript, JavaScript (JS), Python, SQL

Frontend: React, Next.js, Angular, Server-Side Rendering (SSR), RxJS

Backend & Data: Node.js, PostgreSQL, REST APIs

AI / Tooling: Claude API, OpenAI API, local LLM hosting, agent loop design, prompt engineering, LLM-as-judge feedback loops, context management, structured output validation

Testing & DevOps: Playwright, Cypress, Jest, GitHub Actions, GitLab CI/CD, Docker, AWS

Spoken Languages

  • Hungarian — Native
  • English — Professional
  • German — Beginner