Available to hire
I’m Nils Rommelfanger, a software engineer with two decades of hands-on backend development and a strong Continuous Delivery mindset. My expertise spans system architecture, clean code, automated testing, legacy refactoring, deployment pipelines, operations, and observability. Proficient in Java, Kotlin, Spring Boot, and cloud-native technologies, I design and build scalable microservices architectures.
I’m a strong advocate for continuous delivery, test-driven development, fast feedback, and automation. I’ve delivered complex IoT platforms and OAuth2 infrastructures, mentored junior developers, and actively contributed to architectural decisions in agile teams.
Language
German
Fluent
English
Fluent
French
Beginner
Work Experience
Senior Software Engineer at Actico GmbH
August 1, 2025 - August 1, 2025Joined the project shortly before the deadline and contributed to core features in sanction list monitoring; improved exception logging and reduced boilerplate; addressed bugs; QA: enhanced test readability; managed database schema with Liquibase ensuring zero-downtime deployments.
Senior Software Engineer at Ously Games GmbH
August 1, 2024 - August 1, 2024Streamlined codebase removing obsolete features; implemented streak system; high-throughput write buffers for MySQL; Redis caching; managed Liquibase migrations; ensured zero-downtime deployments.
Senior Software Engineer at Morgenwerk GmbH
March 1, 2024 - March 1, 2024Developed a from-scratch navigation algorithm (A*) for warehouse AGVs; solved online parallel MARP in 3D storage with >99% density; scalable to 10,000 AGVs; modular design and CD/CI-driven development.
Senior Software Engineer at Clevershuttle
May 1, 2023 - May 1, 2023Developed Java/Kotlin microservices; added multi-tenancy support; improved test coverage; introduced OpenTelemetry logging and distributed tracing; mentored juniors; improved GitHub Actions CI/CD; zero-downtime Flyway migrations.
Senior Software Engineer at Bosch.IO
March 1, 2022 - March 1, 2022Robert Bosch Semantic Stack: developed a product catalog microservice; architecture design; CI/CD with GitHub Actions; OpenAPI code generation; graph databases (Neo4j, AWS Neptune); modularization and refactoring to reduce cognitive load.
Senior Software Engineer at Bosch.IO
January 1, 2021 - January 1, 2021Central Authorization Server (OAuth2): Greenfield central auth server; migrated from Keycloak to Ory Hydra; Kubernetes on AWS EKS; Terraform, Helm; Vault for secrets; zero-downtime deployments; root CA; OAuth2/OpenID Connect.
Senior Software Engineer at Bosch.IO
July 1, 2018 - July 1, 2018Permissions Service: Authentication and Authorization SaaS service; zero-downtime blue/green deployments; Flyway; Vault; OAuth2; Kubernetes.
Senior Software Engineer at Bosch.IO
September 1, 2017 - September 1, 2017Bosch Thermotechnik: Backend for B2B/B2C portal; remote collaboration with German/Portuguese teams; Java 8, Vert.x, MongoDB, RabbitMQ, Cloud Foundry, OSGi.
Senior Software Engineer at Bosch.IO
February 1, 2017 - February 1, 2017Indego autonomous lawn mower: sole backend developer; automated tests with JUnit/Mockito/Jenkins; weather-based mowing feature; OTA firmware update management; scalability profiling.
Senior Software Engineer at Bosch.IO
September 1, 2015 - September 1, 2015E-Mobility charging broker: backend development; architecture; logging improvements; integration with multiple charging providers.
Senior Software Engineer at Bosch.IO
February 1, 2015 - February 1, 2015Telemedicine: migrated SQL code to Hibernate and Criteria API; improved data access and maintainability.
Senior Software Engineer at Bosch.IO
October 1, 2014 - October 1, 2014Customization project of the Finance Suite for Vontobel Bank: maintenance of a large legacy codebase; optimization of Hibernate/SQL queries; introduced unit tests.
Senior Software Engineer at Bosch Software Innovations
April 1, 2013 - April 1, 2013Finance Suite: architecture, backend development, and operations; security-conscious coding; automated tests; migration and integration within banking compliance suite.
CTO at Indextraffic
September 1, 2008 - September 1, 2008Co-founded SEO-focused company; architecture and software development of a templated portal engine for optimized content generation.
Software Engineer at Suchtreffer
January 1, 2007 - January 1, 2007Developed backoffice tools for Adwords campaigns and data integration; ORM mapping to reduce SQL boilerplate.
Education
Diplom-Informatiker (FH) at HTW Konstanz
January 11, 2030 - November 5, 2025Qualifications
Industry Experience
Manufacturing, Media & Entertainment, Transportation & Logistics, Software & Internet, Financial Services, Professional Services
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