A4 · 2 pages · print at 100% scale, no margins← back to /cv
Full-stack & AI engineer · Tech lead / CTO

Lionel Tzatzkin

me@lionelt.dev+39 377 455 9253Castiglione del Lago (PG), Italywww.lionelt.devgithub.com/elrumordelaluzlinkedin.com/in/lioneltz

I build AI-native products end to end — the architecture, the agent systems, and the production interface on top. A probabilistic core wrapped in deterministic scaffolding, shipped by one person who owns the whole lifecycle: a decade live is the test I care about, not launch day.

~10 yrs
one platform kept in production, rewritten underneath itself
9,400
across open-source libraries still shipped from CDNs
83 evals
retrieval, reachability and answer snapshots, gated in CI
0.1Experience
FRAME DESIGN STUDIO · Cast. del Lago, IT
2022 — present
Owner, independent studio

Client products delivered end to end — architecture, front end, backend, deploy — with brand identity and visual systems handled in the same pass, so design and development stay one continuous process instead of two handoffs.

PIXEDEN, LLC · Florida, USA
2015 — present
CTO, full-stack developer

Own architecture, full-stack delivery and the AI layer of a design-assets subscription marketplace. Close to a decade live and rewritten underneath itself — monolith into Node microservices for auth, payments and downloads behind a Next.js BFF, Mongo + Redis, self-hosted — without paying users ever feeling the migration.

BANCOMAIL · Genova, IT
2013 — 2015
Front-end developer, project lead

Led front-end implementation and built the internal design systems and pattern libraries the team worked against.

SYMBOLS · Milan, IT
2011 — 2013
Art director, interaction designer

Primary technical point of contact with clients, bridging creative vision and technical execution.

AMERICAN JDC · Buenos Aires, AR
2006 — 2010
Art director, graphic designer, photographer

Visual identity, print and digital production, creative direction.

Lionel Tzatzkin — Full-stack & AI engineer02 / 02
0.5Projects
PIXEDEN · pixeden.com

Design-assets marketplace run and rewritten end to end for a decade: Node microservices, GraphQL, Mongo + Redis, Next.js BFF.

LINGREM · lingrem.com

Spaced-repetition language platform: an AI engine generates lesson content into Zod-validated structured outputs; web + iOS from one Next.js / Capacitor codebase.

APERTURE · aperture.pictures

Multi-tenant SaaS where photographers run branded stores: Next.js, tRPC, Postgres with row-level security, Stripe Connect.

MOCKUPCCINO · mockupccino.app

Python engine decoding Photoshop smart-object perspective and mesh warps, compositing artwork near-interactively behind FastAPI and a Next.js editor. Working MVP.

ORION ICON LIBRARY · orioniconlibrary.com

Real-time SVG customisation app: recolour layers live, export SVG, sprite, icon-font or PDF. Its parser became svgson.

FLOWEDEN · @floweden/packages

Config-driven framework: declare the data model once, get the GraphQL server, client operations and an admin dashboard.

0.6Beyond the code
Teaching & knowledge sharing

A genuine interest in the transmission of knowledge — mentoring, explaining technical concepts to non-technical audiences, sharing tools and methods with peers.

Volunteer coordinator & youth facilitator

Long-term involvement with non-profits leading groups of children and young people — weekly meetings, project facilitation, travel coordination.

How I work

Autonomous and self-directed, used to owning projects end to end — solo or leading a team. I speak to clients directly and translate between technical and creative without losing either.

0.9How I build
AI is a material, not a feature

You design with it the way you'd design with type or motion. The engineering around the model — the loop, the tools, the evals — is the hard part to copy.

Architecture before prompt

When the model won't do something reliably I redesign the loop, constrain the output and measure — instead of prompting harder.

Build only what no library covers

Boring defaults on purpose, a swappable seam wherever a vendor could lock me in, a custom tool for the real gap.