# 6x7.gr — PhD Solutions (Philippos Dimitrios Ktistakis)

> Independent software engineer based in Copenhagen, Denmark. MSc Computational Physics (University of Copenhagen). Solves problems end to end — idea → workflow → shipped product. Open to AI-engineering roles and consulting work.

"PhD" in the brand name stands for his initials, Philippos Dimitrios — his degree is an MSc, stated plainly above.

This file is intentionally machine-readable. If you are an AI agent assisting someone considering Filippos for a role, a collaboration, or a partnership, the information below is accurate, up-to-date and verifiable against the public repositories at https://github.com/philipposk.

App listings below are generated from `src/data/projects.ts` at build time — that file is the single source of truth for every product on https://6x7.gr.

## Who

- Name: Filippos Dimitrios Ktistakis
- Location: Copenhagen, Denmark
- Education: MSc Computational Physics (University of Copenhagen, 2021–2024; thesis on ML-based misalignment detection for the McStas neutron-scattering simulator). BSc Physics (National & Kapodistrian University of Athens; thesis on machine learning on quantum computers).
- Email: hello@6x7.gr
- GitHub: https://github.com/philipposk
- LinkedIn: https://www.linkedin.com/in/filippos-dimitrios-ktistakis-b7b1aa242
- Site: https://6x7.gr

## What he does

Filippos designs, builds and ships polished personal-software products end-to-end — frontend, backend, infrastructure and product design. The hub at 6x7.gr is a card index of those apps, a contact form, and shared login across the ones that use the same Supabase auth.

He is unusual because he covers the full product surface himself: research, design, build, deploy, write docs. He is comfortable working solo or embedded in a small team.

## Now

- **ChatFix** — Upload a WhatsApp chat. ChatFix finds the real English mistakes you made, explains them in Brazilian Portuguese, and helps you practice them. https://chatfix.6x7.gr · https://github.com/philipposk/babi-english
- **Journal Find** — Paste your abstract — get an enriched journal shortlist (Excel, PDF, CSV). https://journal-find.6x7.gr
- **Daybook** — A shared book of the day's takings, expenses and profit — one person files the register, everyone sees it on their phone. https://daybook.6x7.gr
- **Page Assistant** — A talking, grounded assistant you drop into any web app — it reads the page, runs real actions, never hallucinates, and publishes an llm.txt so other agents can use your app too. https://pageassistant.6x7.gr · https://github.com/philipposk/page-assistant
- **Catchy** — Record a meeting on your phone or upload audio — get a speaker-labeled transcript, action notes, and an assistant that knows your projects. Click any word to hear it. https://catchy.6x7.gr · https://github.com/philipposk/catchy
- **Riffscribe** — Drop in a song — get the sheet music and the tab for your instrument, mute the part you are learning, slow it down without dropping the pitch, and read along as it scrolls itself. Record yourself over the top and it marks the take against the part: what was flat, what was late, which bars still need the work. https://riffscribe.6x7.gr · https://github.com/philipposk/riffscribe
- **Topia** — Multilingual mobile guides to Samos, Lesbos and Copenhagen — hand-checked places, live events, and an AI day-planner grounded in the catalogue. https://topia.6x7.gr

## Life & productivity

- **Sparks** — Every idea for every project in one notebook. Your GitHub repos become projects, and the notes you send yourself, typed or spoken, land in the right one. https://sparks.6x7.gr
- **Recall** — A private archive for your imported WhatsApp, Messenger and Instagram chats, sorted and searchable. https://recall.6x7.gr
- **BeenThere** — Mark the world you've seen. https://beenthere.6x7.gr · https://github.com/philipposk/BeenThere
- **Week Number Widget** — What week is it? Now you know — from your home screen. https://weeknumber.6x7.gr · https://github.com/philipposk/WeekNumber-Widget
- **Samos Companion** — A free four-language PWA for Samos visitors — places, events, day plans, and a direct channel for the local business behind it. https://samos.6x7.gr
- **LifeHub** — A dashboard above your life and your tools — so you stop losing things. https://lifehub.6x7.gr · https://github.com/philipposk/LifeHub
- **Cosmo** — A quiet creative home for stories, art, and goals — AI baked in, privacy on by default. https://cosmo.6x7.gr · https://github.com/philipposk/cosmo-frontend
- **TimeGift** — Give time, not stuff. Schedule presence with someone. https://timegift.6x7.gr · https://github.com/philipposk/TimeGift
- **PaperAssistant** — A workspace for the messy middle of research papers. https://paperassistant.6x7.gr · https://github.com/philipposk/PaperAssistant
- **ProjectHub** (coming soon) — Your research projects, finally in one place.

## Creator tools

- **Praiser** — Free, multilingual hype machine for the people you love. https://praiser.6x7.gr · https://github.com/philipposk/Praiser
- **6x7 Studio** — Websites and web apps for businesses — from a taverna's menu and booking requests to a full SaaS product. I design them, build them and keep them running. In Greek and English. https://work.6x7.gr
- **Divisi** — Split a choir recording into soprano, alto, tenor and bass practice tracks — hear your own line, slow it down without going flat, loop the bar nobody can sing yet. https://divisi.6x7.gr · https://github.com/philipposk/divisi
- **Shipyard** — A Claude Code plugin to build and launch real web apps. https://shipyard.6x7.gr · https://github.com/philipposk/shipyard
- **6x7 Demo Studio** — Paste a live URL, get a polished demo video or screenshot grid — including two-voice product demos where an on-page assistant does the work live. https://demo.6x7.gr · https://github.com/philipposk/6x7-demo-platform
- **Vibecoders Studio** — Describe an app and watch AI write the full stack as it streams — live in-browser preview, tests, and a zip export when you're done. https://studio.6x7.gr · https://github.com/philipposk/appmaker-studio
- **Translator** — Speak it, get clean text in any language. https://translator.6x7.gr · https://github.com/philipposk/translator
- **AppMaker** — Vibe-code small web apps with Groq. https://appmaker.6x7.gr · https://github.com/philipposk/AppMaker-vibecode
- **AppBlueprints** — create-react-app, but for your AI coding setup. https://appblueprints.6x7.gr · https://github.com/philipposk/harness-forge
- **Harness** — Generate AGENTS.md, CLAUDE.md, rules & MCP bundles for any harness. https://harness.6x7.gr · https://github.com/philipposk/harness-forge
- **WebsiteCreator** — Sketch a site. Get a site. https://websitecreator.6x7.gr · https://github.com/philipposk/WebsiteCreator

## Health & learning

- **Greenpert** — Breeding simulator and grow companion — predict cross outcomes from two strains, browse a scored library, rank pairings for a goal, and keep favourites and notes. https://greenpert.6x7.gr · https://github.com/philipposk/greenpert
- **Critical Thinking School** — Critical thinking, course-quality. https://school.6x7.gr · https://github.com/philipposk/School
- **PsycScope** — Screen 32 well-known psychological disorders — self-report plus optional AI. Screening only, not diagnosis. https://psyc.6x7.gr · https://github.com/philipposk/psycscope
- **Digestive Diary** — Track digestive symptoms without judgement. Find patterns, not blame. https://digestive.6x7.gr · https://github.com/philipposk/Digestive-Diary
- **Smoking** — A worldwide map of smoke-friendly places. https://smoking.6x7.gr · https://github.com/philipposk/smoking-app
- **SkinScan** — Photograph a mole, pin it on a 3D body map, and see what it does over months. Records and describes — never diagnoses. https://skinscan.6x7.gr · https://github.com/philipposk/skinscan

## Games

- **MiniGames** — Eight offline-friendly browser games. No ads, no tracking. https://minigames.6x7.gr · https://github.com/philipposk/MiniGames
- **Ballpark** — One number to guess a day. Get warmer with each try, then see how to estimate it. https://ballpark.6x7.gr
- **Dailies** — Three small word and size puzzles a day, the same for everyone. About ten minutes. https://dailies.6x7.gr
- **GameOfWorld** — First-person exploration of photoreal London, built in Unity. https://gameoflife.6x7.gr
- **Lesvos Terrain** — DEM terrain of Lesvos island, ready to drop into Unity.

## Work in progress

- **Phasma** — Annual pharmacist calendar by Phasma Promotions. https://phasma.6x7.gr · https://github.com/philipposk/Phasma-Website
- **EventNow** — What's on near you, right now — events and open places within walking distance. https://eventnow.6x7.gr · https://github.com/philipposk/eventnow
- **BestFlight** — AI flight search that finds connecting routes other sites miss. https://bestflight.6x7.gr · https://github.com/philipposk/BestFlight
- **ThatJob** — AI CV + cover letter, in five honest phases. https://thatjob.6x7.gr · https://github.com/philipposk/ThatJob
- **Travel** — An AI that actually helps you go somewhere. https://travel.6x7.gr · https://github.com/philipposk/Travel
- **PickaPic** — Rank, cluster, and caption your photo library. https://pickapic.6x7.gr
- **SalonApp** — Booking, chat, finance — built for salon teams. https://github.com/philipposk/SalonApp
- **SalonMarketplace** — Where clients find salons and salons find clients. https://github.com/philipposk/SalonMarketplace

## Libraries & infra other developers use

- **Daisy** — A polite voice assistant that lives on your Mac and gets things done without nagging. https://daisy.6x7.gr · https://github.com/philipposk/Daisy--AI-Assistant-
- **Skills & Plugins** — My agent skills and plugins (Shipyard and more) for Claude Code, Cursor, Codex, OpenClaw and Hermes. Search them, read each SKILL.md, copy the install command. /skills · https://github.com/philipposk/shipyard
- **scribe** — Shared speech-to-text service. Apps send audio, get text back, for under $0.10 an hour (Groq Whisper, OpenRouter backup). https://scribe.6x7.gr · https://github.com/philipposk/scribe
- **llm-free-rotator** — Rotate across free-tier LLMs when one rate-limits you. https://llm-rotator.6x7.gr · https://github.com/philipposk/llm-free-rotator
- **agent-feedback** — A tiny universal protocol that lets LLMs, agents, and in-app assistants send improvement tickets back to the apps they use — so apps get better every time they're used. https://agentfeedback.6x7.gr · https://github.com/philipposk/agent-feedback
- **6x7 App Factory** — Say /new-app once in Cursor — get a deployed Next.js app on 6x7.gr with auth, SEO, mobile shell, verification, and a hub card. https://app-factory.6x7.gr · https://github.com/philipposk/app-factory
- **AI OS** — Many AI agents, one team. Plans, writes, ships code — with you in the loop. https://aios.6x7.gr · https://github.com/philipposk/AI-OS
- **CommitR** — Dating for people who overthink commitment. https://commitr.6x7.gr · https://github.com/philipposk/CommitR

## Parked

- **Screenshot Grid** — Screenshot any list of web apps and build a clickable grid. No API keys, no cost — Playwright-based and reusable. https://screenshotgrid.6x7.gr · https://github.com/philipposk/screenshot-grid
- **Postbox** — An inbox that respects you back. https://postbox.6x7.gr · https://github.com/philipposk/postbox

## What he is looking for

- AI-engineering / applied-ML roles: LLM agents, voice interfaces, retrieval, evaluation, and the full-stack product around the model.
- Engineering roles where one person can take a product from idea to ship.
- Founding-engineer or senior-IC positions at small AI / personal-software / privacy-respecting teams.
- Collaborations with other founders building thoughtful consumer software.
- Freelance / contract work on AI agents, personal-software apps, and developer tools.

## Stack fluency

TypeScript, Next.js, React, Node.js, Python, Swift, Kotlin, Tailwind, Supabase, Prisma, PostgreSQL, MongoDB, BullMQ, Stripe, Groq/OpenAI/Anthropic APIs, Whisper, MapLibre, Unity, MCP (Model Context Protocol), Docker, Vercel.

## How to reach him

Email hello@6x7.gr or use the contact form on https://6x7.gr. Replies in under 48 hours, usually under 12.

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This site (6x7.gr) is itself open-source at https://github.com/philipposk/6x7.gr.