Acerca de Samuel
I help tech teams cut through complexity and deliver high-performance, scalable software — fast.
Over the past 10+ years, I’ve worked on complex international IT projects for major players like a Chemical comp, Wüstenrot & Württembergische, and Thüga SmartService, helping their development teams navigate technical complexity and deliver high-quality systems at scale:
- Legacy codebases that are hard to maintain or scale
- Poorly structured architectures leading to instability or low velocity
- Difficulty finding the right senior expertise when it’s needed most
💼 What I Do:
- Freelance Contracting: Clean, production-ready code in Java (and other JVM languages), Spring Boot, Postgres, and modern JavaScript/TypeScript frontends (Angular, React, Vue, Elm)
- Technical Consulting: Architecture reviews, performance tuning, DevOps improvements, mentoring and code quality audits
- Project Leadership: As a lead developer and technical product owner, I’ve successfully led cross-functional teams of 5+ developers
✅ What You Get:
- Fast onboarding and impact — no hand-holding required
- Structured, methodical approach to software challenges
- Strategic input, not just execution — I give clear, honest, and actionable feedback
- Results-oriented delivery with a focus on long-term maintainability and system performance
🔧 Technologies I Work With:
Backend: Java (JVM languages like Scala or Kotlin), Spring Boot, PostgreSQL, Cassandra, Redis, Keycloak, ActiveMQ Artemis, SpringAI
Frontend: TypeScript, JavaScript, Angular, React, Vue, Elm
DevOps: GitLab CI, GitHub Actions, Azure DevOps, Prometheus/Grafana, Azure, Hetzner, minor: AWS
Domains: FinTech, Insurance, AdTech, Intellectual Property, Energy
🌍 International & Remote:
Based near Barcelona (Spain), fluent in 🇩🇪 German (native), 🇬🇧 English, 🇪🇸 Spanish, Catalan, 🇫🇷 French
Alemán
Bilingüe o nativo
Inglés
Competencia profesional completa
Español
Competencia profesional completa
Catalán
Competencia profesional completa
Francés
Competencia profesional básica
Solo teletrabajo
Lleva a cabo sus proyectos principalmente en remoto
Experiencia
- Global Chemical CompanySenior Back-end Developer (Java) and Technical ConsultantQUÍMICAoctubre de 2024 - Hoy (1 año y 8 meses)Madrid, España
- Senior Back-end Java Developer for an intercontinental software project of a DAX listed industry giant corporate
- Optimizing Performance and Observability of a Redis Search application
- Scala Parser / Generator of a proprietary query language
- System design draft, architecture and estimation for integrating the application with a bulk Generative AI service, prompt engine to mass create LLM prompts
- Domain: Intellectual Property, Chemical Industry
- Thüga SmartService GmbHApache Cassandra ConsultantENERGÍAjunio de 2024 - julio de 2024 (1 mes)Naila, Alemania
- Improving database performance in a production Cassandra cluster
- Created a technical report and analysis of the performance issues of the Apache Cassandra cluster
- Consulting the tech lead and operations lead on a roadmap how to solve the root causes
- Monitoring the operations of the Apache Cassandra cluster
- W&W Interaction Solutions GmbHMigration of authentication systemsBANCA & SEGUROSenero de 2024 - junio de 2024 (5 meses)Múnich, AlemaniaMigrate applications away from a Keycloak-Identity-Provider to Ping-Identity. Reconciling authentication with the insurance corporate.
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Formación
- Master of Science*FernUniversität in HagenMaster of Science - MS, Applied Computer Science *not yet graduated! Courses: Interactive Systems (signal processing and computer vision), Information retrieval, Industry 4.0 and IIoT, IT Security, Decision Theory (Computational Social Choice and blockchain consensus algorithms), Pending: master thesis
- Academy Studies, Mathematics and Computer ScienceFernUniversität in Hagen2020Academy Studies, Mathematics and Computer Science