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Product Engineer — Berlin

I read the fine print.
Then I ship the product.

Product engineer who brings structured thinking to software — understanding stakeholders, mapping edge cases, shipping what matters.

Sebastian GiupanaBER · 2026
Corporate LawProduct Engineering

Work

Screenshot of Desco

01

Desco

SaaS — Restaurant Ordering

2026 →

Full-stack QR ordering platform for the Romanian restaurant market. Diners scan, browse, and order from their phone — staff manage orders, tables, kitchen display, and reservations from a real-time dashboard.

Next.jsTypeScriptPostgreSQLNeonDrizzle ORMSSE
Screenshot of Redline

02

Redline

AI Contract Analyzer

2026

AI-powered contract clause analyzer that extracts text from PDF/DOCX uploads, runs a streaming three-pass LLM pipeline (overview → extraction → jurisdiction-aware risk analysis), and presents an interactive risk report with clause chat, analysis history, and Markdown/PDF export.

Next.jsFastAPIVercel AI SDKOpenAIZodNeon PostgresPythonTypeScript
Screenshot of Gato

03

Gato

Translation Platform — Chrome Extension + Web

2026

Chrome extension and web dashboard that translates selected text with full sentence context, using DeepL with LLM fallback for enrichment. Supports bring-your-own-key for multiple AI providers and SM-2 spaced repetition for vocabulary review.

TypeScriptTurborepoFastifySupabaseDeepL APIVercel AI SDKChrome ExtensionNext.js

04

Routr

SaaS — Shopify Embedded App · 2026 →

Shopify embedded app that automates shipping label generation, invoicing, tracking, and COD reconciliation for Romanian e-commerce merchants by integrating with local courier and invoicing APIs.

RemixTypeScriptPrismaPostgreSQLBullMQRedisShopify

05

Inner Circle

AI-Powered Browser Game · 2026 →

A cult leader simulator where LLM-powered follower agents have distinct personalities, hidden motivations, and persistent memory — making every playthrough emergent. Players deliver sermons, manage resources, and navigate betrayal from AI characters that genuinely scheme.

PythonFastAPINext.jsWebSocketsOpenAI APIPydantic

About

The mindset transferred.

I spent five years in corporate law — reviewing contracts, running due diligence on real estate transactions, finding the clause that would blow up a deal six months later.

Now I build products. Different medium, same instinct: understand the problem before you commit to a solution. Map the edge cases. Consider the stakeholders. Then ship something that works.

Stack

TypeScript, Next.js,Node, Python, Postgres

Based in

Berlin, DE

Looking for

Early-stage product roles

Skills

Product

Discovery & scoping · Problem framing · Requirements gathering with non-technical stakeholders · Edge-case mapping

Engineering

CoreTypeScript · Next.js · React · Node.js · Python · PostgreSQL

Backend & DataFastAPI · Prisma · Drizzle · REST · SSE / WebSockets · LLM pipelines (Vercel AI SDK, Zod) · BullMQ / Redis

ArchitectureHexagonal / layered design · Multi-tenant systems · Structured-output LLM pipelines

InfrastructureNeon · Supabase · Vercel · Fly.io · Railway · Docker · GitHub Actions · Sentry · PostHog

Legal & Process

Contract review · Risk analysis · EU regulatory frameworks (GDPR, DSA, AI Act) · Due diligence · Cross-border M&A support

Languages

English (C2) · German (B2) · Spanish (B1) · Romanian (Native)

Experience

Five years in law, now building software — same instinct for structure, different medium.

2026

Full-Stack Engineer · Mind Glee (contract)

Mobile-first mental health web app; Next.js, Supabase, Prisma.

2025

Full-Stack Engineer · European Bartender School (contract)

Two-sided hiring platform; Next.js, Neon, Auth0.

2018–2023

Corporate Lawyer · CMS, Rödl & Partner, and others

M&A, commercial contracts, cross-border deals.

Contact

Let's talk.

I'm looking for product engineering roles at early-stage companies. If that sounds like a fit, reach out.