About Lukas
Senior Fullstack Engineer / Technical Product Partner focused on React/Next.js, TypeScript, Python/FastAPI, Node.js, API integration and data-driven product interfaces.
Frontend & Product UI
Production-ready web applications with React, Next.js, TypeScript, JavaScript and modern component systems. Focus on UX/CX, reusable UI architecture, maintainability, accessibility, performance and collaboration with product/design teams. Experience with Mantine, Material UI, Tailwind CSS, shadcn, Figma, Zustand and Redux.
Backend & API Integration
Backend services, BFF layers and API integrations with Python/FastAPI, Node.js, Express.js, REST, GraphQL, SQL, PostgreSQL/MySQL, Docker and Uvicorn. Comfortable connecting APIs, data workflows and backend systems to clean frontend experiences.
Data Products, Dashboards & Maps
Turning complex data, APIs and workflows into usable interfaces: dashboards, internal tools, data products, maps, charts and visual web apps. Experience with D3.js, Recharts, Plotly, Mapbox, MapTiler, GSAP and geospatial interfaces.
Cloud, Delivery & Quality
Experience with GCP, AWS, Azure, Vercel, Railway, Git, GitHub Actions, CI/CD, serverless setups and IaC/Terraform collaboration. Focus on documentation, architecture notes, linting, tests, Playwright E2E and maintainable handover.
Data & AI Product Context
Experience with Python, Pandas, data cleaning, EDA, ML fundamentals, LLM/RAG concepts, AI-assisted product interfaces and API serving layers. I make data/AI infrastructure usable for real users.
Recent work
For blocks.cloud, a founder-led B2B SaaS startup, I worked as product-minded engineering lead for frontend, UX flows and BFF/API integrations.
Best fit
SaaS, B2B platforms, internal tools, dashboards, data products, API integrations, frontend modernization, onboarding flows, maps/geospatial apps and AI-adjacent product interfaces.
German
Native or bilingual
English
Fluent
Italian
Basic
Can work on-site
Berlin (up to 50km)
Experience
- blocks.cloudSenior Fullstack Engineer - Frontend LeadBANKING AND INSURANCEDecember 2025 - April 2026 (4 months)Berlin, GermanyProduct-minded full stack development and engineering lead for frontend, UX flows and BFF integrations in a founder-led B2B SaaS team, including collaboration with former Flink founder (Oliver Merkel).Built the core product experience from early product scope to go-live in 14 weeks: onboarding, authentication, AWS provisioning flows, Stripe billing, savings/cost dashboards, team settings, observability, security hardening and automated E2E coverage.Stack: Next.js 15, React 19, TypeScript, Python/FastAPI, AWS Cognito, Stripe, DynamoDB, Recharts, Zustand, Zod, Sentry, Playwright, GitHub Actions.
- Lukas KreibigSenior Fullstack Engineer · React/TypeScript · Python/FastAPIJanuary 2021 - Today (5 years and 5 months)Berlin, Germany
- Partner with startups, founders and product teams to scope, build and ship web products from early product idea to production-ready implementation.
- Build data-driven applications, internal tools, dashboards, maps and visual web experiences with React, Next.js, TypeScript and Python/FastAPI or Node.js.
- Connect APIs and data workflows, improve UX/CX, document architecture and ensure maintainable handover to senior teams.
- last client - blocks.cloud: owned a core onboarding flow from initial product scope to beta/launch in a founder-led startup context; covered product clarification, customer experience, technical implementation, cross-functional coordination and handover.
- Systems Lab 21 GmbHSenior Frontend DeveloperApril 2024 - October 2024 (6 months)Potsdam, BB, Germany
- Led front-end development efforts for the Platform 21 product, bringing innovativefeatures to enhance the user interface and user experience.
- Collaborated closely with colleagues to ensure smooth integration of technical anddesign elements using React, Typescript and Mantine.
- Actively participated in continuous integration/continuous delivery (CI/CD) and testautomation processes to optimize the development workflow.
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Education
- Data Science & Machine LearningIronhack2025Intensive full-time program focused on Python, statistics, machine learning, and deep learning. Hands-on experience with supervised and unsupervised learning, MLOps, cloud computing, and advanced topics such as NLP and computer vision. Final projects based on real-world datasets, involving the development and presentation of complete machine learning workflows.
- Wild Code School - Full Stack Developer BootcampWild Code School2021Completed a 5-month intensive bootcamp specializing in JavaScript, React, Node, and Express. Proficient in creating responsive web applications and translating wireframes into functional designs.
Certifications
- Web and App Development BootcampWild Code School2021
- Data Science & Machine LearningIronhack Bootcamp2025