No more bottlenecks from missing developer capacity

Product Engineering: I build the features your customers are waiting for – production-ready, integrated into your stack, without burdening your team

Profilbild
Successful projects with
Continuum
Objego
eco.income
Abo Store

Do these problems sound familiar?

Can I help with your project?

Yes, if you...

  • Lead a SaaS team that needs to deliver complex features quickly
  • Need features that improve your existing product
  • Work sprint-based and expect regular exchanges and clear deliverables

No, if you...

  • Are looking for a developer who delivers for months without feedback and context
  • Are looking for a full-time employee

How I help

I'm Nils – Senior Fullstack Developer specialising in modern web applications. Over the past years I've guided several SaaS products from the first line of code to launch and know what it means to deliver production-ready work under pressure.

With me you get:

  • Fast onboarding: I'm onboarded and productive within days – not weeks.
  • Clean handover: Every feature is documented, tested, and seamlessly integrated into your codebase.
  • Product thinking included: I question before I build – and deliver what's actually needed.
Profilbild
My stack:
Typescript
TailwindCSS
TanStack Query
Shadcn UI

Successfully implemented for

Abo Store

Abo Store

Full-Stack Development

Herausforderung

  • Ideation, feature conception, and implementation of the complete business idea
  • Building and operating an SEO-optimised web platform
  • Technical implementation of all frontend and backend development

Ergebnisse

  • Scaled to over 10,000 monthly visitors through organic traffic
  • Top-3 ranking in Google search for over 100 relevant keywords through targeted SEO optimisation
  • 1st place at the startup competition "Leitidee" in Bochum (2022)

Tech Stack

Typescript
TailwindCSS
Shadcn UI
Firebase Functions
Docker
eco.income

eco.income

Full-Stack Development

Herausforderung

  • Full-stack development of a SaaS product including software architecture and data model
  • Close collaboration with the founder for continuous product validation

Ergebnisse

  • Built a SaaS product from scratch through to launch including customer onboarding
  • Long-term operation of the platform with high availability

Tech Stack

Typescript
TailwindCSS
Docker
Google Cloud
PostgreSQL
Sentry
Objego

Objego

Front-End Development

Herausforderung

  • Further development of an existing SaaS product, implementing new features within a Scrum team
  • Regular training and onboarding of new team members
  • Advancing the application architecture in collaboration with other lead developers

Ergebnisse

  • Reduction of build and test times by up to 80% by converting a monolithic Angular application into monorepos and micro frontends
  • Successful Angular version upgrades from v15 to v18, including refactoring and adoption of new Angular features

Tech Stack

Typescript
Docker
Sentry
Continuum

Continuum

Full-Stack Development

Herausforderung

  • Further development of a SaaS solution with Next.js and Firebase
  • Support with planning new features and advancing the product roadmap

Ergebnisse

  • ~60% improvement in load times through implementing a frontend caching strategy and optimising training plan generation algorithms
  • Introduction of unit tests with >80% test coverage on new code
  • Improved development velocity through refactoring and code optimisation

Tech Stack

Typescript
TailwindCSS
TanStack Query
Shadcn UI
Firebase Functions
Firestore
Sentry

Your project?

Get in touch

From initial planning to handover to your team

Discovery

Together we look at where your team stands today – which features are waiting, what takes too long, and where bottlenecks occur. We then plan my role within the team and decide together how I can best help.

Development

During development I work closely with you and the team. Regular exchange and code reviews are a natural part of my process.

Launch & Handover

After launch I stay as long as everything is running stably. I document everything so you don't remain permanently dependent on me. When new requirements arise later, I'm there.

Testimonials

There aren’t many true full-stack developers. Fewer still can take on deeply complex problems and genuinely solve them. Nils is both, and more. He brings technical depth, clarity of thought, and a calm, reliable presence to every project. A highly respected and recommended addition to any team. And when he’s not coding, he’s out training for triathlons; a true embodiment of work hard, code hard, play hard. On all fronts, Nils is a machine.

At objego, I worked with Nils in different teams and phases of the company - from greenfield features to legacy migrations. What always impressed me was how quickly he could slot into new setups and immediately start contributing real value. He brings a strong mix of technical depth, calm communication, and the flexibility to adapt to changing requirements. You always felt in good hands when Nils was involved.

Nils war einer der ersten, die unser Produkt technisch mit aufgebaut hat. Mit seiner strukturierten Arbeitsweise, Flexibilität und klaren Kommunikation hat er maßgeblich dazu beigetragen, dass wir schnell vom Konzept zur funktionierenden Lösung kamen. Besonders wertvoll war seine Fähigkeit, Unklarheiten in Anforderung proaktiv und kreativ zu lösen und ein gutes Auge für UI.

Tell me about your project

Here's how it works

A no-obligation conversation about your project

We'll discuss your project and I'll show you how we can tackle it together.

Concept and proposal

I'll create a detailed concept with a clear timeline and a transparent offer.

Fast execution

From concept to working solution with regular updates and clear communication.

Want to talk about your project? Feel free to reach out via the form or:

Frequently Asked Questions