Alexander H.-Tech Lead | Founding-Stage Engineer | Full-Stack Product Builder
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Experience
Freelance Full-Stack Engineer & Technical Lead
Self Employed
- Full-stack TypeScript development
- Application architecture
- Technical leadership
- Infrastructure and scalability
- Legacy and architecture migrations
- Building and improving production applications
Tech Lead (Founding-Stage Engineer)
Jetplan
- Joined in a messy early-stage state and professionalized the codebase
- Led and executed a 7-month migration from Firebase to PostgreSQL
- Established engineering processes (issue management, communication, workflows)
- Led and mentored developers, shaping team structure
- Owned technical direction across backend, frontend, and infrastructure
- Helped scale revenue from €100k → €800k
Senior Software Engineer
Baserow
- First and main contributor to the Baserow Application Builder
- Built product-heavy systems across backend and frontend
- Worked on performance-critical, database-driven features
- Helped scale engineering team from 5 → 20 developers
Senior Software Engineer
FactSet
- Full-stack development for financial platforms used by banks
- Built reliable enterprise-grade frontends and backend integrations
CTO
Swarm Market Research AI
- Led a team of 5 developers
- Launched a complex production system
- Involved in the full startup lifecycle (tech, product, operations)
- Scaled company from 0 → €500k revenue
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology and Banking and Finance.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Operations, and Strategy.
Summary
I'm a senior full-stack TypeScript developer with 8 years of professional experience, including 6 years working at startups and in technical leadership roles.
I have extensive experience building and improving web applications from the ground up, as well as taking ownership of existing systems that need to evolve. My work covers the full stack, including React, Node.js, TypeScript, PostgreSQL, APIs, databases, infrastructure, CI/CD and cloud services.
I've worked on products ranging from early-stage applications to production systems with thousands of users. I'm comfortable working independently, taking ownership of complex technical problems, and collaborating closely with founders, product teams and other engineers.
I'm particularly experienced in architecture, system migrations, improving reliability and performance, and building maintainable applications without unnecessary rewrites.
I'm available for both project-based work and ongoing freelance development.
Skills
- Taking Products From Messy → Structured → Scalable
- Owning Full Systems (Backend, Frontend, Infrastructure)
- Establishing Engineering Processes In Growing Teams
- Designing Clean Architectures Without Overengineering
- Bridging Business Goals And Technical Decisions
Tech Stack
- Backend: Node.Js, Typescript, Python, Django, Flask, Postgresql
- Frontend: Vue.Js, Nuxt, React, Typescript
- Focus: End-To-End Type Safety, Apis, System Architecture, Distributed Systems
Languages
Education
University of Surrey
BSc (Hons) · Computer Science · United Kingdom · First
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Alexander is based in Dreieich, Germany and can operate in on-site, hybrid, and remote work models.
Alexander speaks the following languages: German (Native), English (Native).
Alexander has at least 8 years of experience. During this time, Alexander has worked in at least 4 different roles and for 5 different companies. The average length of individual experience is 2 years and 8 months. Note that Alexander may not have shared all experience and actually has more experience.
Based on recent experience, Alexander would be well-suited for roles such as: Freelance Full-Stack Engineer & Technical Lead, Tech Lead (Founding-Stage Engineer), Senior Software Engineer.
Alexander's most recent position is Freelance Full-Stack Engineer & Technical Lead at Self Employed.
In recent years, Alexander has worked for Self Employed, Jetplan, Baserow, and FactSet.
Alexander is most experienced in industries like Information Technology and Banking and Finance.
Alexander is most experienced in business areas like Information Technology, Product Development, and Operations. Alexander also has some experience in Strategy.
Alexander has recently worked in industries like Information Technology and Banking and Finance.
Alexander has recently worked in business areas like Information Technology and Product Development.
Alexander holds a Bachelor in Computer Science from University of Surrey.
Alexander is immediately available full-time for suitable projects.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 15 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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