Sebo Mayer
( About )Index 01

About

Web & mobile developer — from hybrid apps to high-traffic web applications.

( Bavaria — since 2021 )
I write code that solves real problems — functional, maintainable, built for people.
( Bio )

I'm Sebo, a web and mobile developer from Upper Bavaria. My path into software development wasn't a straight one, and that's exactly what makes it valuable: I worked in entirely different fields before, took responsibility for teams and operations, and learned along the way that good solutions rarely emerge at a desk alone.

You have to listen, understand what people really need, and then deliver. That mindset came with me when I made the move into development in 2021.

Since then, I've been building applications with React, React Native, Angular, and TypeScript. At Check24, I worked on comparison platforms serving hundreds of thousands of users every day, where performance and code quality aren't optional extras but non-negotiables.

At Promptus, I designed and owned the architecture of an Expo-based hybrid app from the first draft to release.

What drives me: writing software that's still maintainable tomorrow and still a pleasure to work with the day after. I keep learning, think in systems rather than isolated features, and measure my work by whether it works for the people who end up using it.

Tittmoning, Oberbayern
Tittmoning, Oberbayern2026

Capabilities

( 01 — 06 )
01 Web apps React, Angular, TypeScript — high-traffic applications
02 Mobile React Native, Expo — hybrid apps from concept to release
03 Backend Node.js, Express, Ruby on Rails, MongoDB, Rust, SQL, SQLlite
04 Tooling & CI/CD Nx, Jenkins, Kubernetes, Storybook, Git
05 Server Linux, Proxmox
06 Migration & refactoring TypeScript migrations, reworking legacy codebases

How I work

( 01 — 06 )
01 Overview Every project starts with a conversation, not with code. Before I write a single line, I want to understand what you really need and what goals are behind the project. From there, I create initial design proposals that we refine together in an open feedback loop until the design is settled and feels right. Then comes the technical architecture and finally the implementation: clean code following current best practices, whether for web, mobile, or standalone desktop applications. To me, that naturally includes everything that makes a project truly complete: well-thought-out hosting, thorough testing, accessibility, SEO and indexing, performance optimization, and reliable email integration. At the end, you get a clean handover, and if you like, I'll stay on board afterwards with maintenance and regular check-ups. The feedback loop never really ends: you know where we stand at every stage, and your input flows directly into the work.
02 Concept Architecture, requirements, goals, alignment with customer or project management
03 Design Close collaboration with the customer or UX/UI design, working in Figma
04 Build TypeScript-first, component-driven, Storybook
05 Testing & deploy Automated tests, Jenkins CI/CD
06 Iteration Agile cycles, Shape Up, continuous improvement

Career

( Selected )
Selfemployed Software Developer Project based work for different customers — since 2026
Promptus GmbH Software developer — 2024–2025
Check24 Junior software developer — 2022–2024
Web Developer Bootcamp neue fische — 540 hrs, certified
Trachtenvogl Deputy manager
Café Jasmin Deputy manager — 2013 - 2016
Apprenticeship as carpenter Holzraum — 2012 - 2013
B.A. Media Management Mediadesign Hochschule Munich

Technologies

preview