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Jossef Roncal

Geneva, Switzerland — Swiss citizen

Jossef Roncal

Machine Learning Engineer & Software Architect

I build AI systems that are allowed to touch real records: measured, auditable, and shipped to production.

Engineer with eight years of building and running a software and fiduciary company in Geneva, and a Master of Science in Engineering (HES-SO), completed in 2026, in Software Engineering. I work where machine learning meets systems of record — accounting, documents, compliance — and I care as much about what a model costs and how it is verified as about what it can do.

Ventures

Ventures

What I have built and still run.

Digital Admin

Digital Admin Sàrl

Founder and managing partner · Geneva · 2018–present

A Swiss digital fiduciary for SMEs, freelancers and startups: a web platform for invoicing, quotations and VAT, backed by full bookkeeping and tax services. I own the product, the architecture and the cloud infrastructure behind it.

digitaladmin.ch

Capabilities

Capabilities

Machine learning in production

LLM agents with tool calling, document intelligence, OCR, Bi-LSTM and Transformer models. PyTorch, TensorFlow, Python.

Cloud architecture

Microservices and event-driven systems on AWS: ECS Fargate, Lambda, S3, SNS/SQS, DocumentDB. Node.js, TypeScript, Docker, CI/CD.

Delivery and governance

Agile project management (Scrum, Jira) with a distributed team, enterprise architecture in ArchiMate under TOGAF.

Selected work

Selected work

Digital Copilot — an LLM agent in production

An agent that reads business documents and creates the corresponding accounting entries through the platform's own API, under human confirmation, with every entry traceable back to its source document. Deployed on AWS in Zurich.

Architect and developer · 2025–2026

WIPO — enterprise technology portfolio

Maintained the technology portfolio of the World Intellectual Property Organization: ArchiMate modelling, BizzDesign scripting, TOGAF.

Enterprise architect, 2022–2024.

Digital Software Technologies — leading a distributed team

Agile project manager for a full-stack web and mobile development team working remotely between Geneva and Peru: sprint planning and tracking, technical coordination, and delivery. Scrum and Jira.

Agile project manager · 2021–present

Master's thesis — document intelligence

Compared a Bi-LSTM classifier I trained against a vision-based LLM agent to decide the architecture of a production pipeline. Graded 6/6.

HES-SO, 2026.

Education & languages

Education & languages

Education

  • MSc in Engineering, Computer Science / Software Engineering — HES-SO, 2026
  • BSc in Information Technology Engineering — HEPIA, Geneva, 2021
  • Life Sciences Engineering (coursework) — EPFL, 2013–2016

Languages

  • FrenchNative
  • SpanishBilingual
  • EnglishC1 — Cambridge C1 Advanced
  • ItalianB2 — Swiss Matura
  • GermanB1 — Goethe-Zertifikat B1