miltiadis kotsarinis
I build agentic AI systems and interactive experiences.I help companies ship AI systems and interactive experiences.
Lead engineer & ML/AI architect. Seven years shipping Unity and Unreal projects for Fortune-500 clients across law enforcement, energy, automotive and sports. Now architecting production AI agents in banking.Lead engineer and AI architect. Seven years building VR/AR training and interactive experiences for Fortune-500 companies across law enforcement, energy, automotive and sports. Now designing production AI systems in banking.
● open to consulting and collaboration
what i do
Capabilities
Agentic AI systemsAI systems & automation
LLM agent systems in production: orchestration, tool use, guardrails, verification pipelines. Currently building AI agents for banking workflows.AI assistants and automations for production use, with the guardrails and checks that make them dependable. Currently: AI systems in banking.
Unity & XR engineeringVR & AR experiences
Seven years of real-time 3D: VR training simulators, AR apps and lenses, computer vision, multiplayer, large-scale interactive installations.Seven years of virtual and augmented reality: training simulators, product showcases, interactive installations, mobile and web AR.
Educational & training VR
Simulation modules that teach and certify real skills: physics-based interaction, dynamic scoring, localization, LMS integration.Simulation training for real skills — built with your instructors, with scoring and certification, connected to your existing training systems.
Technical leadership
Requirements to shipped product: scoping, technical design, leading small teams, AI-assisted development workflows.From idea to shipped product: scoping, planning, leading the build, reporting progress in plain language.
selected work
Things I've built
essense-flow in progress
Multi-phase AI development pipeline orchestrating fleets of coding agents — spec, architecture, build, review and verification as a state machine. Status: working lab, 900+ tests.A pipeline that coordinates many AI coding agents to plan, build and cross-check software. Status: working lab, not a finished product.
ML trading research platform personal r&d
Crypto market research stack: walk-forward ML, regime detection, cost-realistic backtesting engine with 700+ behavioural tests.A personal research platform that tests trading ideas against market history with realistic costs. 700+ automated checks.
elenivrontzou.com live client work
Site for a registered dietitian-nutritionist — booking, content, CMS. Designed, built and shipped end to end.Website for a registered dietitian-nutritionist — online booking, articles, and content she updates herself. Designed, built and shipped end to end.
client work
Delivered for clients
Selected agency projects, 2019–2026. Only publicly showcased work is named; links go to the live product, case study or press.A selection of the client projects I worked on, 2019–2026. Only publicly showcased work is named; links go to the product or its story.
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Doodlar ↗ primary developer
AR app that recognizes kids’ animal drawings (CNN classifier) and brings them to life in 3D.App that recognizes kids’ animal drawings and turns them into living 3D animals.
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Space Invaders: World Defense ↗ developer
AR mobile game for the franchise’s 45th anniversary (ARCore Geospatial) — AR features, VFX/shaders, gameplay.AR mobile game for the arcade classic’s 45th anniversary, played in real city streets.
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Samsung × Vogue — NYFW 2024 ↗ developer
Motion-tracked painting installation — gesture painting on a 3×3 m screen, AI-edited photos.Painting installation at New York Fashion Week — visitors painted on a wall-sized screen with hand gestures.
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Deloitte CyberSphere ↗ developer
Touchscreen installation walking visitors through five interactive cyber-attack scenarios. Launched at RSA Conference.Touchscreen installation walking visitors through five cyber-attack scenarios. Launched at a major security conference.
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AOI galleries — × CYPHER, × Shoyu ↗ primary developer
Digital-art galleries in Unreal Engine, streamed to the browser via Pixel Streaming, plus the content CMS behind them.3D art galleries that ran in the browser — no install — plus the system for managing their content.
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Charterhouse London — The Great Chamber ↗ developer
Online museum experience — photogrammetry 3D room in the browser (Three.js/WebGL), spatial audio, interactive points of interest.A historic London room, scanned and explorable in the browser — with audio and stories at every point of interest.
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NHK Enterprises — sign-language digital human ↗ developer
Digital human performing Japanese Sign Language — Unity automation pipeline turning animation data into accurate in-engine recordings (hand + facial rigging).A digital human that performs Japanese Sign Language for broadcast — built the automation that produces its animations at scale.
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Dr. Jart+ — WebAR lead developer
WebAR product campaign — 3D label tracking and portals (8thWall + Three.js).Augmented-reality product campaign running in the phone’s browser — point the camera at the product, a world opens.
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Microsoft Flip — AR lenses ↗ developer
30+ educational AR lenses for the classroom video platform, incl. ASL fingerspelling (Lens Studio / Camera Kit).30+ educational augmented-reality camera effects for a classroom video platform, incl. sign-language practice.
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Axon — VR training ↗ localization
VR TASER training platform for law enforcement, with dedicated taser controller hardware.VR training for law enforcement, used with a dedicated training taser.
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Mystery Coast ↗ developer
Interactive-video treasure-hunt iOS game — UI rework, object pooling, performance optimization.Interactive-video treasure-hunt game for iPhone — interface rework and performance.
Not everything is public: AR showcases for a major consumer-tech event, a VR rigging-and-hoisting certification trainer, and more — ask.
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Operating principles
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Got a hard problem?
Building something and need a technical opinion, an architect, or a build partner — reach out.