About

Who am I?

Hi, I'm Samuel. I build production distributed systems. Since Business Informatics in 2011 that has meant platforms that have to work under real operational load. Earlier roles include enterprise messaging at SAP Event Mesh and Spring-based decisioning services. I currently work as Senior Software Developer on a nationwide train-information system (Java, Angular, Kafka, MongoDB, Kubernetes/OpenShift). Since May 2026 I serve as Interim Product Architect on that engagement: architecture and interface decisions for passenger and cargo information flows. Since July 2026 I also act as Security Champion, embedding secure design into agile delivery. Day to day I still write and review production software.

Java 25TypeScriptAngularKafkaOpenShiftArgoCDMongoDBSpring Boot

RÉSUMÉ

Technology Experience

Programming Languages

Technology	Experience
Java	Production language for large-scale enterprise and railway systems. Current day-to-day stack is Java 25 with Spring Boot.
TypeScript	Day-to-day language for Angular frontends on the SBB train-information system.
JavaScript	Application scripting, browser extensions, and the original Gatsby version of this site. The live portfolio now runs on Next.js.
SQL	Schema work, CRUD APIs and migrations in enterprise systems (Liquibase, JPA, PostgreSQL, DerbyDB, Sybase ASE). Current railway persistence is MongoDB.
Go	Production services at SAP Event Mesh, including a metrics exporter into Prometheus and Grafana. Also used in personal backend tools.
Python	Used professionally at ACTICO on ML / decisioning services, plus DeepLearning.AI coursework. Not the current day-to-day language at SBB.
HTML	Markup for production Angular frontends, this site, and internal tools.
CSS	Styling for production frontends and this site.

Libraries / Frameworks

Technology	Experience
Spring Boot	Primary backend framework for REST services on the current rail assignment and earlier decisioning work.
Angular	Day-to-day frontend for the SBB train-information system, with RxJS.
React	Personal and portfolio UIs. This site is Next.js on React.
Mockito	Unit and integration tests for Java services.
Kubernetes	Production platform work from SAP Cloud through SBB: pods, Helm charts, and GitOps on OpenShift.

Tools / Platforms

Technology	Experience
Apache Kafka	Event streaming for operational train information in production.
OpenShift	Production Kubernetes at SBB, with GitOps through ArgoCD.
MongoDB	Day-to-day persistence for nationwide train information.
Git / GitHub	Daily professional and personal workflow, including GitOps through ArgoCD.
Docker	Container runtime for Java and Go services, tests, and Kubernetes workloads.
Maven	Standard Java build tool on enterprise services.
Linux	Daily runtime for services (Ubuntu, Debian, CentOS, Alpine).
Grafana	Production dashboards with Prometheus and PostgreSQL at SAP, and on personal systems.
Helm	Kubernetes packaging for production deployments.
Terraform	Infrastructure as code for cloud resources.
Jenkins	CI for test and deployment automation on enterprise messaging and similar pipelines.
Solace PubSub+	Enterprise messaging at SAP Event Mesh: broker setup, cloud service integration, and production messaging flows.
AWS	EC2 and S3 for Kubernetes-based cloud workloads at SAP.
RabbitMQ	Message brokers in SAP Event Mesh / cloud messaging services.

Data / Design

Technology	Experience
Adobe CC	Extensive experience with Photoshop, Illustrator, and Audition. Further tools such as After Effects, Premiere, and XD have only rarely been applied for smaller projects.
Strapi	Open-source headless CMS used as the content backbone for this site. Content is queried at build time via GraphQL. The frontend is Next.js.
Octave / Matlab	Used mostly during my studies. First at Lappeenranta University of Technology in Intelligent Computing, later in Machine Learning coursework.
TensorFlow	Used during the DeepLearning.AI Deep Learning specialization on Coursera (2020-2022) for neural network coursework.
PyTorch	Explored with the book Deep Learning for Coders with fastai and PyTorch, after the Deep Learning specialization.

Stations Legend

Symbol	Category	Description
	Apprenticeship	Vocational training in an enterprise or institution
	Education	Self-directed studying efforts
	Internship	Internship in an enterprise or institution
	School	Attending school
	University	Attending national or foreign University
	Work	Taking a job in an enterprise or institution

STATIONS

Category:
Work
Institution:
SBB / Fincons Group AG
From:
10/2022
To:
present
Senior Software Developer at Fincons Group AG on a client assignment for Swiss Federal Railways. Interim Product Architect since May 2026 and Security Champion since July 2026 for train-information systems covering passenger and cargo transport.
Java 25TypeScriptAngularSpring BootKafkaMongoDBKubernetes/OpenShiftArgoCD
2022
Category:
Work
Institution:
ACTICO GmbH
From:
12/2021
To:
9/2022
ACTICO GmbH, formerly Bosch Financial Software. Software Developer in the Machine Learning team, building Spring-based REST microservices for hosting, deploying and executing rule-based and ML decision models used in banking.
JavaDockerMavenAngular
2021
Category:
Education
Institution:
Coursera
From:
11/2020
To:
2/2022
Graduation:
Completed
Completed Andrew Ng's Machine Learning course, then the DeepLearning.AI Deep Learning specialization, for a foundations-level understanding of neural networks. In parallel I started this portfolio, first on Gatsby.js / React / Three.js with a Strapi GraphQL CMS, later migrated to Next.js.
Resources / Certificates:
Specialization Deep Learning
Neural Networks and Deep Learning
Improving Deep Neural Networks: Hyperparameter Tuning, Regularization and Optimization
Structuring Machine Learning Projects
Convolutional Neural Networks
Sequence Models
Deep LearningHyperparameterNeural NetworksGatsby.jsREACTJavascriptGraphQl API
2020
Category:
Education
Institution:
Coursera
From:
11/2020
To:
2/2021
Graduation:
Completed
Gradient descent into Machine Learning by studying the fundamentals. I completed the popular Andrew Ng Coursera "Machine Learning" course, which hooked me on the topic.
Resources / Certificates:
Machine Learning
MatlabPythonMachine Learning
2020
Category:
Work
Institution:
SAP SE
From:
10/2016
To:
12/2020
SAP SE - Software Developer in SAP Cloud Platform Messaging / SAP Event Mesh. Helped establish and extend enterprise messaging used in production by mid-size and global customers. REST provisioning APIs for message brokers, cross-broker migration of critical customer data, incident handling, and a Go exporter for broker statistics into Prometheus and Grafana. Stack: Java, Go, Solace PubSub+, RabbitMQ, Apache Kafka, Cloud Foundry, Kubernetes, AWS, Azure, Alibaba Cloud.
Messaging ServicesJavaGoK8sDockerCloud FoundryShellLinux
2016
Category:
University
Institution:
Lappeenranta University of Technology
From:
1/2014
To:
5/2014
Graduation:
Successful (Grade: 4.21 out of 5 | Very Good)
Term abroad. International Business and Technology Management Program at LUT University in Lappeenranta, Finland. Courses completed: Introduction to Intelligent Computing, Innovation Management and New Product Development, Promotion and Sales Management, Finnish I.
Intelligent ComputingInnovation ManagementPromotion & Sales ManagementFinnish
2014
Category:
Work
Institution:
University of Mannheim - Chair of Information Systems IV
From:
9/2013
To:
12/2013
Student assistant at the University of Mannheim at the Chair of Information Systems IV. Tasks included Master Team Project SAP NetWeaver Gateway rights and roles management, troubleshooting, and student support. Assistance in lecture preparation by refactoring of lecture material and academic support with scientific literature analysis.
Student AssistantSAP NetWeaver GatewayLecture MaterialLiterature AnalysisPaper
2013
Category:
University
Institution:
University of Mannheim
From:
8/2011
To:
12/2015
Graduation:
Bachelor of Science
Studied Business Informatics at the University of Mannheim. Deepening in "Artificial Intelligence" and "Banking and IT Management". My final thesis topic was "The Relationship between Exploitative and Explorative Business Process IT" submitted at the Chair of Information Systems headed by Prof. Dr. Alexander Mädche. Highlight: Conducting a Software project with a distributed five people team. We had to build a remote control web application for a humanoid robot. The remote control enabled robot steering, speech command operations, role assignments for either "catch" or "escape," playing "catch me" with other robots.
UniversitySoftware DevelopmentBusinessArtificial IntelligenceBanking and IT Management
2011

About

Who am I?

Technology Experience

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