Freelance · Fullstack AI Integration

AI features your users keep using.

Most AI features in SaaS products get tried twice and then forgotten. I build the ones that stick, because they solve an actual problem in your users' workflow.

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Nils Schlüter
01 / ProfileBochum · DE
Successful projects with
Interhyppub.tech / ARDContinuumObjegoeco.incomeAbo Store
— Services

Get the most out of your website

03 Angebote

01

Bringing AI Features to Production – Fast and Secure

Want to use AI in your product but don't know where to start? I'll integrate LLMs, RAG pipelines, and MCP servers into your existing system – production-ready, GDPR-compliant, and without months of trial and error.

02

Manage content quickly and effortlessly – without developers

Every change to your website costs time and ties up your developers? Your CMS is holding back development and hurting your visibility? It's time for a CMS built specifically for you.

03

Build features your customers actually want

The backlog is full but the dev team is at capacity? I implement the features your customers need that would otherwise sit waiting for weeks – in parallel, without affecting your day-to-day operations.

— About

Who am I?

I'm Nils – Senior Product Engineer from Bochum, Germany. I help SaaS companies and scale-ups reduce technical debt, bring products to market faster, and ship AI features into production. I specialise in Next.js, Headless CMS, Product Engineering, and AI integration (LLM, RAG, MCP Server).

  • 10+ years of fullstack web development for SaaS, scale-ups, and enterprise
  • Projects with measurable results: 60% less load time, >10,000 organic visitors/month, 75% faster content management
  • Deep technical expertise with a focus on product and business goals
Nils Schlüter
01 / ProfileBochum · DE

I'm flexible with technology, but especially enjoy working with:

tools
TypescriptNext.jsPostgreSQLNode.jsPrismaReactTanStack QueryTailwindCSSShadcn UIDockerKubernetesVercelGitSentry
— Selected work

Successful Projects

07 case studies

  • 01 / Case
    Interhyp

    Interhyp

    Front-End Development

    — Challenge

    • Further development of the Next.js-based websites and the headless CMS
    • Migration of three standalone websites (interhyp.de, prohyp.de, interhyp-gruppe.de) from a legacy CMS to Sanity – including data migration, schema design, and content modeling
    • Development of new CMS components and editorial features for more flexible content management

    — Results

    • Successful migration of all three websites to Sanity
    • Significantly reduced maintenance effort for editors thanks to a more intuitive CMS interface and custom components
    • Modernization of the technical infrastructure as a foundation for improved SEO performance and faster feature development
    Next.jsTypescriptSanityTailwindCSSDocker
  • 02 / Case
    Pubtech Logo

    pub.tech / ARD

    Front-End Development

    — Challenge

    • Further development of a shared component library for several high-traffic ARD websites (tagesschau.de, sportschau.de, brisant.de, ard.de) as part of a CMS migration
    • Further development of the frontend and CMS (Strapi) for hilfe.ard.de, which is serving as a central help desk for all ARD services
    • Improvement of editorial workflows through optimized CMS structures and customized input forms

    — Results

    • Consistent styling and uniform features across all ARD websites through a shared component library
    • Significantly faster and more structured content management for editors through improved CMS integration
    • Successful participation in the migration of several major news portals to a modern CMS
    Next.jsStrapiTypescriptJavascriptHTMLCSS
  • 03 / Case
    Pubtech Logo

    pub.tech / BR

    Front-End Development

    — Challenge

    • Frontend development for an AI-powered React application that personalizes radio clips based on the user’s location
    • Integration of an existing, station-specific application into the ARD Sounds platform and scaling to multiple radio stations
    • Development of complex frontend features such as live transcription and deep linking in close collaboration with the AI team
    • Complete UI redesign to align with the overarching platform

    — Results

    • Successful integration and scaling of an AI product as part of a large media platform
    • Seamless connection between AI output and the frontend—from data integration to user-friendly presentation of personalized content
    • Expanded functionality through new features that make the AI experience tangible and interactive for users
    Next.jsTypescriptTailwindCSSDocker
  • 04 / Case
    Continuum

    Continuum

    Full-Stack Development

    — Challenge

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

    — Results

    • \~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
    Next.jsTypescriptTailwindCSSNode.jsTanStack QueryShadcn UI
  • 05 / Case
    Objego

    Objego

    Front-End Development

    — Challenge

    • 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

    — Results

    • 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
    AngularTypescriptDockerSentry
  • 06 / Case
    eco.income

    eco.income

    Full-Stack Development

    — Challenge

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

    — Results

    • Built a SaaS product from scratch through to launch including customer onboarding
    • Long-term operation of the platform with high availability
    TypescriptReactTailwindCSSNode.jsDockerGoogle Cloud
  • 07 / Case
    Abo Store

    Abo Store

    Full-Stack Development

    — Challenge

    • 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

    — Results

    • 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)
    Next.jsTypescriptNode.jsTailwindCSSShadcn UIFirebase Functions
01/08
— Process

I support you from idea to launch – and beyond

03 phases

  1. 01— Discovery

    Discovery & Planning

    We discuss your project and figure out exactly how I can support you. If everything fits, we create a detailed roadmap. We define and prioritise the most important features before development begins.

    Book a Discovery Call
  2. 02— Build

    Development & Testing

    During development I implement the agreed features by priority. I focus on clean code, regular updates, and thorough testing to ensure quality. You receive regular updates and feedback rounds to make sure we stay on track.

  3. 03— Launch

    Launch & Support

    When you're ready to go live, I take care of deployment and long-term operation. We continue to develop further features and improve the product as needed.

— Testimonials

Testimonials

03 voices

Hira Verick
01 / ReferenceHira VerickDesign / Technology / Strategy @ continuum

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.

John Drake Brockman
02 / ReferenceJohn Drake BrockmanChapter Lead @ ista

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.

Jurij Peters
03 / ReferenceJurij PetersCo-Founder & CEO @ eco.income Engineering GmbH

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.

— Fit check

Am I the right developer for you?

— “Yes, if you...”

  • Have an existing SaaS product and want to get AI features (LLMs, chatbots, automations) into production quickly – without months of internal ramp-up
  • Lead a small dev team (3–5 developers) and need senior-level expertise that can contribute immediately rather than needing to be trained first
  • Expect results in numbers: load times, deployment frequency, time-to-market – not just “clean code”

— “Probably not, if you...”

  • Are still in the pre-product phase and need to validate your product vision first – in that case, I recommend a product coach first
  • Have a fixed spec document and are looking for someone to implement it without asking questions
  • Are looking for a developer for a single marketing page or a prototype – my focus is on more complex SaaS products
— Contact

Tell me about your project

Response < 24h

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

— Here's how it works

  1. A no-obligation conversation about your project

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

  2. Concept and proposal

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

  3. Fast execution

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

— Direct

project_request.formlive
— FAQ

Frequently Asked Questions

06 questions