PROFESSIONAL EXPERIENCE
Senior Fullstack Engineer Spiri.Bo GmbH Mar 2025 - now
- Assumed responsibility for backend architecture and technical strategy, planning and leading the
platform’s evolution in close collaboration with the CTO
- Simultaneously drove the development of new features for the housing and tenant management
platform, balancing high-level architectural design with hands-on implementation
- Utilized AI-assisted workflows (with tools such as Claude Code, Codex, Cursor) and worked on
AI-based features (with tools such as N8N, Mastra, ElevenLabs)
- Technologies: Node.js, TypeScript, React.js, Next.js, PostgreSQL, Google Cloud, Docker, Kubernetes
Freelance Software Engineer OTTO GmbH Jul 2023 - Jan 2025
- Built new and enhanced existing features of product detail page of Europe’s second largest online
shop
- Introduced a feature that used LLMs to make customer reviews more accessible to customers
- Massively reduced complexity and improved performance of core feature (product dimension
selection)
- Technologies: Node.js, TypeScript, AWS, AWS CDK, Go, Java, Spring Boot, MySQL, MongoDB,
Github Actions, Docker, Jenkins
Freelance Software Engineer hello iteration GmbH Apr 2022 - Apr 2023
- Built event driven system to provide Smart TVs with accurate TV program + streaming service data
- Improved time at which program changes reach end customers from hours to seconds
- Technologies: Node.js, TypeScript, NestJS, MongoDB, Azure Cloud, Kubernetes, Docker, Terraform
Freelance Software Engineer Leogistics GmbH Jan 2021 - Mar 2022
- Built features such as integration of OpenID Connect in a microservices architecture for a company
providing cloud logistics solution for leading German companies in the retail and industrial sector
- Technologies: Node.js, TypeScript, NestJS, MongoDB, TypeORM, NATS, Docker
Freelance Software Engineer Nils Jessen Innovationsberatung Apr 2021 - Oct 2021
- Lead backend developer in project to provide modern UX (incl. great performance) to checkout
flow of an insurance company
- Technologies: Node.js, TypeScript, MySQL, Angular, Redux, Docker, GitLab
Freelance Software Engineer A1 Telekom Austria AG Jan 2020 - December 2020
- Built the next generation online store of Austria’s leading fixed and mobile network operator
making heavy use of micro frontends
- Shipped customer journey from product discovery until order placement for fixed net internet and
TV bundles as a full stack engineer with focus on backend
- Technologies: Node.js, React, TypeScript, GraphQL, Apollo, Kubernetes, Docker
Senior Software Engineer YOUSURE Tarifvergleich GmbH Aug 2019 - Jan 2020
- Implemented redesign/rewrite (FE + BE) of Austria’s leading price comparison platform for
insurances, utilities and phone plans
- Researched several solutions and built a proof of concept for a visual testing suite
- Researched solutions and communicated concept for an appointment booking tool to relevant
stakeholders
- Technologies: Node.js, React, next.js
Software Engineer 3-S IT Dienstleistungen GmbH Apr 2019 - July 2019
- Implemented FE + BE of user management portal designed to manage 1 million+ users
- Worked on a legacy Angular 1.3 application adding new features and performing bug fixes for the
existing codebase
- Designed, documented and coordinated implementation of REST API with external partner
- Introduced extensive unit and integration test suite (0% -> 80%+ test coverage)
- Technologies: Node.js, React, Typescript, Redux, Angular, Keycloak, MongoDB, Styled Components
Software Engineer Vaamo Finanz AG Feb 2016 - Mar 2019
- Worked on the backend and frontend of a diverse set of features
- Full stack responsibility for features such as password reset, master data edit and investment
strategy change
- Technologies: Scala, Java, Play Framework, PostgreSQL, Python, React, Redux, Node.js, Styled
Components, AWS
RELEVANT PROJECTS
- Net Worth Tracker (2018): Simplistic Android app to track one’s net worth - Kotlin, Dagger 2
- InformatiCup [Telefonnummer nur mit Premium sichtbar]): Desktop application to use OpenStreetMap data to return the
relevant area for a Space Usage Rule defined by type and coordinates (University project with
team of 3) - Java, Maven
- Prototype of job search platform (2018): Ruby on Rails app to match employers and employees
including capturing all relevant data of both parties, job postings, applications to those job
postings and review functionality for both parties - Ruby on Rails, PostgreSQL
- Listnr (2020): Built initial version of platform to create podcasts out of written text using Google
WaveNet and similar APIs with a team of 3 developers, moved to role of Technical Advisor after
launch - React, Node.js, MongoDB, SSML