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Hi, I’m Jan Kasper, a Senior Software Engineer based in Frankfurt am Main. I design and implement secure, scalable backend systems using Java and Spring Boot, building microservices for a SaaS platform used by enterprise clients. I focus on robust architectures, event-driven designs with Kafka, and strong security and data protection for enterprise contexts. I enjoy collaborating with product teams, guiding architecture decisions, and mentoring engineers to improve code quality and reliability. I value observability, secure data handling, and delivering features that meet regulatory requirements while keeping a friendly, collaborative approach.…Hi, I’m Jan Kasper, a Senior Software Engineer based in Frankfurt am Main. I design and implement secure, scalable backend systems using Java and Spring Boot, building microservices for a SaaS platform used by enterprise clients. I focus on robust architectures, event-driven designs with Kafka, and strong security and data protection for enterprise contexts. I enjoy collaborating with product teams, guiding architecture decisions, and mentoring engineers to improve code quality and reliability. I value observability, secure data handling, and delivering features that meet regulatory requirements while keeping a friendly, collaborative approach.

Jan Kasper

Programmer, Web Developer, Developer, +2

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Hi, I’m Jan Kasper, a Senior Software Engineer based in Frankfurt am Main. I design and implement secure, scalable backend systems using Java and Spring Boot, building microservices for a SaaS platform used by enterprise clients. I focus on robust architectures, event-driven designs with Kafka, and strong security and data protection for enterprise contexts. I enjoy collaborating with product teams, guiding architecture decisions, and mentoring engineers to improve code quality and reliability. I value observability, secure data handling, and delivering features that meet regulatory requirements while keeping a friendly, collaborative approach.…Hi, I’m Jan Kasper, a Senior Software Engineer based in Frankfurt am Main. I design and implement secure, scalable backend systems using Java and Spring Boot, building microservices for a SaaS platform used by enterprise clients. I focus on robust architectures, event-driven designs with Kafka, and strong security and data protection for enterprise contexts. I enjoy collaborating with product teams, guiding architecture decisions, and mentoring engineers to improve code quality and reliability. I value observability, secure data handling, and delivering features that meet regulatory requirements while keeping a friendly, collaborative approach.

Available to hire

Hi, I’m Jan Kasper, a Senior Software Engineer based in Frankfurt am Main. I design and implement secure, scalable backend systems using Java and Spring Boot, building microservices for a SaaS platform used by enterprise clients. I focus on robust architectures, event-driven designs with Kafka, and strong security and data protection for enterprise contexts.

I enjoy collaborating with product teams, guiding architecture decisions, and mentoring engineers to improve code quality and reliability. I value observability, secure data handling, and delivering features that meet regulatory requirements while keeping a friendly, collaborative approach.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at P&T Software House

November 1, 2021 - Present

Led the architecture and development of 12+ Java/Spring Boot microservices powering a secure SaaS platform for internal reporting and case management used by enterprise clients. Designed and implemented event-driven architecture using Apache Kafka, processing 50k+ platform events per day. Built scalable backend services handling 10k+ daily user interactions and document processing workflows with strict security and access control requirements. Introduced centralized observability with Prometheus and Grafana, reducing incident detection time and improving production monitoring across multiple distributed services. Delivered 20+ production features in collaboration with product and engineering teams, translating regulatory requirements into scalable backend solutions. Mentored 3+ engineers through architecture reviews, pair programming, and code reviews, improving code quality and engineering standards across the team.

Java Engineer at Keylane B.V.

September 1, 2019 - October 1, 2021

Developed backend services for a large-scale insurance SaaS platform supporting €92M+ in annual revenue. Built REST and GraphQL APIs using Java, Kotlin, Spring Boot, and Hibernate, integrating 15+ internal and partner systems. Implemented microservices processing hundreds of thousands of insurance policy transactions annually. Investigated and resolved production incidents across distributed services, improving platform stability.