10/04/2026 updated
100 % available
Principal Engineer & Consultant | AI Systems, Game Development & Backend Infrastructure
Paiporta, Spain
Only remote
School of Hard KnocksAbout me
I'm a hands-on principal engineer with 30 years of experience, from RuneScape and Mortal Kombat 1 to production AI systems. I help teams solve difficult engineering problems and ship reliable software. Based in Spain, working remotely, with a direct, collaborative approach.
C++ (Programming Language)Video Game DevelopmentGame EngineTypeScriptRust (Programming Language)React.jsBackendReact NativeUnreal EngineArtificial Intelligence Markup Language (AIML)
AI Engineering & LLM Integration
Production-depth LLM integration including streaming tool use, prompt caching, structured outputs, multi-provider routing, RAG and agentic memory with pgvector and hierarchical retrieval, eval harnesses and LLM-judge pipelines, voice (STT/TTS) loops, and multi-agent orchestration.
Game Development
Extensive experience with Unreal Engine C++, Unity ecosystems, proprietary engines, ECS, deterministic simulation, gameplay systems, and networking. Shipped titles including Mortal Kombat 1 and work on The Witcher 4.
Backend & Infrastructure Engineering
Deep expertise in TypeScript/Node, Python, Go, Rust, Java, and C++; gRPC microservices; Postgres and Redis; Docker and Kubernetes; AWS; CI/CD pipelines; and atomic deploy systems.
Rust Systems Development
Authoring of multiple production-candidate Rust systems including a voxel-world substrate, a native Git LFS transfer agent, a cargo action-capture tool, and a Linux terminal workspace fork, all with verified acceptance gates and public repositories.
Agent Platform & Orchestration
Design and delivery of a proprietary AI agent-orchestration platform used to ship two commercial products end-to-end, including EU regulatory compliance tooling for live merchants and an adaptive AI learning product.
Technical Leadership & Architecture
Architecture ownership, team leadership and mentoring, stakeholder communication, and lean process management across multiple engineering disciplines including frontend, backend, AI, and Unreal systems.
CI/CD & Evaluation Systems
Building CI-integrated eval harnesses, adversarial review pipelines, quality-gate machinery, and repair-loop systems for both AI and software delivery contexts.
Cloud & DevOps
Hands-on experience with AWS, Docker, Kubernetes, atomic deployment strategies, multi-cloud storage, and dependency-backed acceptance and provenance attestations.
Voice & Multimodal AI
Implementation of voice-native AI applications using Deepgram and ElevenLabs voice loops, synchronized voice architectures, and generative UI within production applications.
Production-depth LLM integration including streaming tool use, prompt caching, structured outputs, multi-provider routing, RAG and agentic memory with pgvector and hierarchical retrieval, eval harnesses and LLM-judge pipelines, voice (STT/TTS) loops, and multi-agent orchestration.
Game Development
Extensive experience with Unreal Engine C++, Unity ecosystems, proprietary engines, ECS, deterministic simulation, gameplay systems, and networking. Shipped titles including Mortal Kombat 1 and work on The Witcher 4.
Backend & Infrastructure Engineering
Deep expertise in TypeScript/Node, Python, Go, Rust, Java, and C++; gRPC microservices; Postgres and Redis; Docker and Kubernetes; AWS; CI/CD pipelines; and atomic deploy systems.
Rust Systems Development
Authoring of multiple production-candidate Rust systems including a voxel-world substrate, a native Git LFS transfer agent, a cargo action-capture tool, and a Linux terminal workspace fork, all with verified acceptance gates and public repositories.
Agent Platform & Orchestration
Design and delivery of a proprietary AI agent-orchestration platform used to ship two commercial products end-to-end, including EU regulatory compliance tooling for live merchants and an adaptive AI learning product.
Technical Leadership & Architecture
Architecture ownership, team leadership and mentoring, stakeholder communication, and lean process management across multiple engineering disciplines including frontend, backend, AI, and Unreal systems.
CI/CD & Evaluation Systems
Building CI-integrated eval harnesses, adversarial review pipelines, quality-gate machinery, and repair-loop systems for both AI and software delivery contexts.
Cloud & DevOps
Hands-on experience with AWS, Docker, Kubernetes, atomic deployment strategies, multi-cloud storage, and dependency-backed acceptance and provenance attestations.
Voice & Multimodal AI
Implementation of voice-native AI applications using Deepgram and ElevenLabs voice loops, synchronized voice architectures, and generative UI within production applications.
Experience
Professional experience10+ years
Freelancer since2000
Languages
EnglishNative speaker
Project history
Replaced the production backend solo with a parity-tested, mutation-tested, Zod-contract-first TypeScript engine; built surrounding Python/Go LLM infrastructure, atomic deployment, streaming tool output, and CI evaluation systems. Reduced staged-generation latency by 40%+ through prompt caching and safe parallelism.
Independent consulting and product work across production AI, agent systems, software architecture, and delivery assurance. Built the orchestration, evaluation, adversarial review, quality-gate, and repair-loop machinery behind public systems and assurance work.
Gameplay systems on The Witcher 4 in Unreal Engine 5; prototyped internal AI tools.