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Luis MännerLM

Luis Männer

Fullstack Developer | React, Next.js, AWS...

€880/day
8 projects
Luzern, CH
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Luis

10+ years of IT experience mean one thing to me above all else: I don't just understand that a technology works, but why.

In an era where code is often superficially assembled with AI, I offer deep technical understanding. I don't deliver "vibe code" that collapses under the first load spike, but rather well-thought-out architectures. I strategically use the advantages of today's AI tools as a productivity turbo to deliver in record time without compromising quality or maintainability.

Why working with me makes the difference:

Deep Tech Understanding:Thanks to 10+ years of experience, I penetrate complex systems to their core. Whether it's performance optimization in TypeScript or complex database structures (SQL & NoSQL) - I quickly know what's happening under the hood.

AI-Powered Efficiency:I combine deep technical understanding with AI workflows for maximum delivery speed. My years of experience before the AI era enable stable and long-term maintainable architecture.

Pragmatism over Dogmatism:I develop solution-oriented. Depending on the project phase - whether a fast MVP or a highly available enterprise system - I precisely adapt the test coverage and architecture to your budget and goals.

Full-Stack Power:Proficient in TypeScript (Next.js, Angular, Node.js) and cloud infrastructures (AWS, Docker). I deliver complete solutions.

I am based in Lucerne and support companies throughout Switzerland in implementing technical visions with precision and modern speed.

Let's discuss how we can get your project off the ground efficiently and stably.
  • German

    Native or bilingual

  • English

    Fluent

Can work on-site
Luzern (up to 50km)

Experience

  • Selp GmbH
    Co-Founder & Lead Developer – Selp (FinTech / Accounting)
    SOFTWARE PUBLISHING
    February 2025 - May 2026 (1 year and 3 months)
    Luzern, Switzerland
    - Product Vision & Architecture: Conception and construction of a complex accounting tool for the Swiss market (SaaS) from the first line of code to market entry.
    - FinTech Logic & Data Security: Implementation of high-precision calculation logic for accounting processes, considering strict Swiss data protection and compliance requirements.
    - Full-Stack Ownership: Sole responsibility for the development of the entire tech stack (TypeScript, Next.js, Cloud Infrastructure), including automated deployment pipelines.
    - Operation & Scaling: Building a stable, cloud-based infrastructure.
    - Requirements Engineering with Subject Matter Experts: Close coordination with tax advisors to precisely translate complex legal and tax requirements into simple UI flows.
    Typescript Domain Modelling Requirements Engineering Software Architecture Cloud Infrastructure
  • Flatmatch GmbH
    Founding Engineer (External)
    REAL ESTATE
    January 2024 - June 2025 (1 year and 5 months)
    Berlin, Germany
    - End-to-End Product Development: Solely responsible for the conception and development of the entire platform architecture (Full-Stack).
    - Cloud Infrastructure & Operations: Setup, scaling, and monitoring of the cloud environment to ensure stable live operation.
    - Technical Interface Management: Coordination and integration of third-party providers as well as technical communication with external partners.
    - Strategic Technology Consulting: Conducting feasibility studies and technical risk management for new features and business models.
    - Pragmatic Engineering: Fast iteration cycles from prototype to production system, considering budget and time constraints.
    Software Architecture Typescript Cloud Infrastructure Technical Product Strategy API Integration
  • Otto GmbH & Co KG
    Fullstack Developer
    E-COMMERCE
    January 2022 - July 2023 (1 year and 6 months)
    - Technical further development of the rendering and data storage systems for the product detail page
    - Test-Driven Development
    - Development of infrastructure as code with CDK for AWS
    - Further development of the team's own rendering framework
    - Development of frontend components using the team's own framework
    - Operation and monitoring of live systems
    - Implementation of logging and alarming
    TypeScript IT Infrastructure AWS Linux Scrum

Reviews

5.0

Out of 8 ratings

J

Jozef

Sepp Mgmt. Inhaber Gojani

Reviewed on 10/19/2023

Luis was brilliant, just like when he created my homepage. He adapted my homepage to PayPal, and everything works as I wanted. His reliable and precise way of working is the reason why I will only work with him in the future. Thank you and well done Luis.
J

Jozef

Sepp Mgmt. Inhaber Gojani

Reviewed on 9/1/2023

I am extremely glad that I chose Luis. He developed my website exactly as I envisioned it and implemented improvements directly. Luis is very talented in what he does and a person you always want to work with.

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