Iason Koukas Greece · Remote
AI-native backends, cross-platform mobile games, and the systems that keep them running in production. Designed, built, shipped and maintained end to end, on the App Store and Google Play since 2016.
Featured project
A mobile role-playing game where every turn is written live by language models, narrated, illustrated and scored with music. The main engineering challenge is keeping a story coherent across hundreds of turns at a sustainable cost per turn.
iOS and Android · Python backend · Unity client
Five overlapping mechanisms (vector retrieval over pgvector, hierarchical summaries, a continuously rewritten world bible) keep characters, places and promises consistent past 400 turns.
A routing table over about twenty models from a dozen providers picks by capability, maturity rating and price, prices every turn, and fails over when a provider goes down.
FastAPI and async SQLAlchemy on Postgres, with deadlock-free ordered locking, optimistic concurrency, an incremental sync protocol, scheduled background jobs and a maintenance gate.
Credits economy with per-turn cost accounting, Apple and Google purchases with server notifications, narration voices, generated artwork, and music matched from a library of about 1,700 tracks.
Deployed with Docker on a single droplet, with daily backups, certificate renewal, crash reporting and usage analytics. Designed, deployed and operated by one person.
Other projects
Five Unity apps share a common infrastructure layer (purchases, ads, consent, audio, dialogs, analytics) that I built and maintain across all of them. Three more are native Android apps. I keep them current with platform and store requirements.
Word puzzle · English and Greek, two store apps
Fair global competition with no server at all: every player gets identical daily and weekly challenges generated from the week number. Eight leagues, 54 multi-level achievements, a small scripting language for tutorials, and every word you find plays a melody as its letters dissolve. The Greek version has over 30,000 downloads on Google Play, rated 4.4.
Greek survey quiz
Four hundred levels and 1,200 questions, half of them created with an AI-assisted pipeline that also finds and fixes weak hints. Over 100,000 downloads on Google Play, rated 4.4 from more than 3,000 reviews.
Greek word game
A wheel-of-fortune word game in Greek, on the stores since 2016: over 500,000 downloads on Google Play and a 4.3 rating from more than 7,000 reviews.
Licensed comic and match-3 game
Back on both stores in 2026: moved to Unity 6, redesigned with the comic’s author, and its sign-in and cloud saves moved to Google Play Games v2.
Native Android · Java
Greek Crosswords, Crossword Challenges and Sokoban, modernized to current Android. The crossword grids come from my own generator, which repairs dead ends by backtracking, with every clue checked by an AI judge. Greek Crosswords alone has over 100,000 downloads on Google Play.
Approach
Quality and robustness come first in my work. I use AI coding agents every day, with the discipline I would apply to working in a team: written specifications, review of every change, and documented standards.
Experience
Trained as a computer engineer, I spent my first professional years on command-and-control software for Greece’s emergency services, then went independent to build and run my own products.
An AI story RPG for iOS and Android: designed, built, deployed and operated alone.
Started with a daily online crossword, later rebuilt offline because it was simpler to run and more engaging, followed by an English edition and Sokoban on Android. Then a first version of Lexosynthesis, Kid Beowulf, Wheel of Words and Percent on both stores, and later a complete rebuild of Lexosynthesis.
Geospatial command-and-control software in Java, used by the fire service, police and emergency medical services. I owned whole modules end to end: a semi-automated reporting tool, a rich-text mail client for messaging inside the platform, a SIP softphone integrated with the call centre, a live grid of camera feeds, and the console that handles every incoming alarm.
Master’s in Science and Technology of Computers, Telecommunications and Networks, with distinction (over 9/10), completed while working at Satways, within doctoral research on computer-aided optimization of circuit design.
Five-year engineering degree, University of Thessaly, Volos.
Skills
Across the full path of a request: the mobile client, store billing, the API, the database and the AI providers.
Availability