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Dustin SpallekDS

Dustin Spallek

Full-Stack Developer & DDD Software Architect

€800/day
Hamburg, DE
8-15 years

Average response time: A few days

Freelancer profile translated to English.
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About Dustin

I am 36 years old and an expert in developing modern software solutions that function sustainably, not just today but also in the future. My goal is to combine technical expertise with the specific needs of my clients to deliver long-lasting results.

What makes me special: I first analyze the requirements precisely and then develop solutions that are easy to understand and efficient to implement. I rely on proven methods to make complex processes understandable and to create systems that remain flexible and stable.

Let's find out together how we can take a project to the next level.
For this, I offer:

✔ Holistic Approach – I bring technical expertise and simultaneously understand your business goals and challenges.

✔ Simple Solutions for Complex Problems – With modern methods and clear communication, I help to clarify requirements together and put them into practice.

✔ Sustainable System Architecture – I build software so that it remains flexible and can grow with your company.

✔ Experience That Counts – In many projects, I have supported companies from various industries in developing high-quality software.

✔ Knowledge Transfer – I support teams and companies by passing on my knowledge in an understandable way and making it accessible to everyone.

✔ Innovative Technologies – Modern tools and trends such as Mixed Reality are also part of my repertoire to advance projects.
  • German

    Native or bilingual

  • English

    Fluent

Can work on-site
Hamburg (up to 50km), München (up to 50km), Berlin (up to 50km), Stuttgart (up to 50km), Frankfurt am Main (up to 50km)

Experience

  • Kassenärztliche Vereinigung Bayerns
    Software Architect | Full-Stack Development | Requirements Analysis | Conception | Consulting
    PUBLIC SECTOR
    June 2025 - May 2026 (11 months)
    München, Germany
    Development of a web-based software solution for correcting complex billing of medical practices towards statutory health insurance funds. The application digitizes and optimizes the coordination process between practices and case workers through clear roles, guided correction processes, and specialized checking and processing functions. This significantly reduces communication overhead and processing times, while sustainably increasing transparency and process quality.

    Technology & Methodology: Vue, TypeScript, JavaScript, Playwright, CSS, Java, Spring Boot 3, RabbitMQ, Thymeleaf, Gradle, Grafana, Prometheus, Docker, Flyway, Monolith, Bitbucket, Figma, UI & UX, DDD, TDD, Scrum, DST
    Software Architecture Vue.js Java Typescript User Interface Design
  • Privates Projekt
    React & NextJS App & Python LLM + Kotlin Backend as BFF with Keycloak Integration
    SOFTWARE PUBLISHING
    March 2025 - Today (1 year and 5 months)
    Hamburg, Germany
    As part of a private side project and for my own further development, I am currently building a platform where projects can be submitted. An AI agent then creates an honest assessment of how and why I am suitable for the respective project.

    Technologies in use:
    – React & Next.js for the frontend
    – Kotlin (Backend-for-Frontend architecture) for authentication (SpringBoot)
    – Python FastAPI application as the basis for the AI agent
    – Keycloak
    LLM Python React.js Kotlin Keycloak
  • WPS - Workplace Solutions GmbH
    Roads Regio - MIA
    PUBLIC SECTOR
    March 2024 - February 2025 (1 year)
    Hamburg, Germany
    **Role**: Development, Requirements Analysis, Conception, Consulting

    **Client**: Autobahn GmbH

    **Client's Industry**: Public Sector, 1000+ Employees


    Further development of a software solution for the efficient coordination of construction sites in cities and on highways. The goal is to ensure traffic flow is as disruption-free as possible despite construction sites, to optimally utilize resources, and to guarantee transparent communication between authorities, construction companies, and road users.

    **Technology & Methodology**: Angular, TypeScript, AgGrid, Karma, CSS, Java, Kotlin, Spring Boot 3, Maven, Docker, AWS, GIS, OpenLayers, Liquibase, ArchUnit, KeyCloak, GitLab, DDD, TDD, Scrum, DST
    Java Angular GIS IT Architecture Domain Driven Design

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Education

  • Master, Informatik
    Hochschule für Angewandte Wissenschaften Hamburg (HAW Hamburg)
    2020
    Master, Informatik
  • Wirtschaftsinformatik
    Hochschule für Angewandte Wissenschaften Hamburg (HAW Hamburg)
    2017
    Wirtschaftsinformatik

Certifications

  • Certification for iSAQB Foundation Level
    iSAQB
    2021
    Architecture Tools Fundamentals of Software Architectures Quality Goals Components/ Building Blocks Interfaces/ Relationships Architecture Goals

Skill set

Categories