Freelance · Java, Kotlin & Go · AWS & Kubernetes · Claude Code
I design, build and run microservices on AWS and Kubernetes – from architecture to go-live, AI-assisted with Claude Code. For enterprises like HUK-COBURG, TUI and BMW as well as for my own products.
Manuel Müller, M.Sc.
Senior Software Engineer · Cloud & Backend
Project experience at
01 — Results
Not a list of buzzwords, but systems I built – delivering the outcome they were designed for.
Since 2024
Senior engineer, sales backend
Cloud-native Java services around online rate calculators and application flows: Quarkus microservices on AWS, infrastructure as code, zero-downtime blue-green deployments and end-to-end monitoring – running a high-traffic sales channel.
100,000+
offer updates per day
High-performance caching system powering dynamic search for hotel rates and availability. Four years in the core team: Java microservices, AWS infrastructure and technology selection – plus Scrum Master and mentor for new colleagues.
International
B2C fashion shop in live operation
Almost two years in the team of an international fashion shop: new REST APIs built test-driven, extended Jenkins CI/CD pipelines, and new shop features and redesigns – all while the shop was running.
6 products
live on the market – built with Claude Code
As co-founder of LaunchX GmbH I build and run our own products with paying users – with a small team and a fully agentic workflow based on Claude Code: shared Go backend, mobile apps, releases and LLM features.
PlannyMealsTrackyMealsBrutalCoach
02 — Services
01
Microservices and APIs that are cleanly separated, well tested and observable in production – event-driven where it makes sense.
Java · Kotlin · Go · Spring Boot · Quarkus · Kafka · PostgreSQL
02
AWS infrastructure as code, Kubernetes deployments and GitOps – scalable, traceable and without unnecessary cost.
AWS · EKS · Lambda · Terraform · FluxCD · GitLab CI
03
Bringing Claude Code into your team productively: agentic workflows, custom skills and guardrails that shorten lead time without sacrificing quality. Plus LLM features in products – with predictable cost.
Claude Code · Agentic Workflows · MCP · LLM APIs · Prompt Engineering
04
When the backend needs a face: web frontends and mobile apps that fit the backend and stay maintainable.
TypeScript · React · Next.js · Vue · React Native
The best solution is the simplest one that really solves the problem – and that your team can keep evolving on its own.
I translate between business and tech and have supported teams as Scrum Master and mentor. You always know what I'm working on and where the risks are.
Monitoring, tests and infrastructure as code are part of the design from day one – not when things are already on fire.
03 — About
I'm Manuel Müller. Since 2017 I have been building backend and cloud systems for companies in insurance, travel, automotive and e-commerce – including HUK-COBURG, TUI InfoTec, BMW Group, R+V Versicherung and BestSecret.
My focus is Java, Kotlin and Go microservices on AWS and Kubernetes, infrastructure as code with Terraform, and AI-assisted software development with Claude Code. As co-founder of LaunchX GmbH I also build our own apps such as PlannyMeals and TrackyMeals.
I hold a Master's degree in Computer Science from FAU Erlangen-Nuremberg and I'm an AWS Certified Solutions Architect and Certified Kubernetes Application Developer (CKAD). I work remotely across Germany and on-site in the Munich area – in German or English.
04 — References
“Manuel is highly adaptable, quickly adjusting to changing project needs. His collaborative spirit and deep technical expertise make him an exceptional team player. He approaches projects with an agile mindset, delivering clean, high-quality code while ensuring solutions are both innovative and cost-effective.
Marc-André Momm
Head of Technology, TUI InfoTec
“Manuel consistently delivers clean code, demonstrating a deep understanding of software craftsmanship. His fresh ideas and open-minded approach contribute to innovative solutions, bridging the gap between legacy systems and state-of-the-art technology.
Stefan Pörsel
Product Owner, BMW Group
“What I appreciated most when working with Manuel is that he treats his customers' projects with a passion as if they were his own. He is all about getting it done.
Roman Schmidmeir
VP Engineering, BestSecret
05 — Process
A short email with goal, stack and timeline is enough. You get an honest answer within one business day on whether it's a fit.
30 minutes, free and non-binding. We clarify requirements, scope and whether I'm the right person for it.
Part-time or fixed-price offer, contract, onboarding. I work remotely or on-site – directly or through your preferred agency.
Part-time with fixed days per week, fixed-price projects with a clear scope, and consulting or workshops – for example on adopting Claude Code. I'm currently not taking on full-time engagements.
Both. I mostly work remotely and am happy to join workshops, kick-offs or regular team days on-site – easily in the Munich/Landshut area, elsewhere in Germany by arrangement.
Yes. I work directly with companies as well as through agencies and project brokers.
I'm most effective in teams that need to build, migrate or scale cloud backends – from startup MVP to enterprise project.
Mainly insurance (HUK-COBURG, R+V), travel (TUI), automotive (BMW Group) and e-commerce (BestSecret) – plus our own consumer apps at LaunchX. The engineering transfers well: if you need scalable backends on AWS, we should talk.
Yes. I use Claude Code productively every day – in our own products and in client projects – and help teams get started: setup, project-specific skills and rules, safe guardrails for code review and CI, and pairing sessions with your developers.
German and English – documentation, meetings and code reviews in either language.
06 — Contact
A few sentences on goal, tech stack and timeline are enough. Within one business day you get an honest assessment of whether I can help.
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