Senior Backend Engineer

Job title: Senior Backend Engineer

We are looking for a Senior Backend Engineer to strengthen the service layer of an e-banking platform. You will design, build, and operate highly reliable, secure microservices written in Kotlin with Spring Boot, integrated via Apache Kafka, and deployed on Red Hat OpenShift. This hands-on role requires taking ownership from API contract design through production observability, and serving as a technical reference for your squad.

What You'll Do

• Design, develop, and maintain secure, scalable backend services and APIs using Kotlin and Spring Boot.
• Build and operate event-driven integrations via Apache Kafka including producers, consumers, Kafka Streams, and Avro schemas with exactly-once semantics.
• Own data models, query optimization, and schema migrations across PostgreSQL and MySQL.
• Integrate services with observability, CI/CD, and DevOps tooling; support deployment and monitoring on OpenShift/Kubernetes.
• Apply security best practices in the realms of OAuth2/OIDC, authentication, authorisation, and encryption.
• Conduct code reviews, uphold engineering standards, and mentor junior engineers.
• Produce high-quality technical documentation covering design, implementation, and API contracts.

What We're Looking For

• 5+ years of professional backend engineering experience.
• Proficiency in Kotlin. Strong hands-on experience with Spring Boot (Spring MVC, Security, Data JPA, Cloud, Actuator).
• Solid Apache Kafka experience including Kafka Streams, Schema Registry, and exactly-once semantics.
• Proficiency with PostgreSQL and MySQL: data modelling, query plans, replication, and working with connection pools (HikariCP).
• Practical experience with Kubernetes or OpenShift.
• Sound understanding of distributed systems, microservices architecture, and design patterns.
• Familiarity with OAuth2/OIDC and backend security fundamentals.
• Proficiency with Git and CI/CD practices.
• German B2+, English business proficient.

Nice to Have

• Bachelor’s degree in computer science, information technology, or equivalent experience.
• Prior experience in regulated industries such as banking or fintech.
• Familiarity with Spring Cloud and distributed tracing tools.
• Experience with database migration tooling such as Flyway or Liquibase.
• French or Italian, advantageous given the multilingual Swiss platform.

Compensation & Benefits

• 25 days of holidays, 2 volunteer days, mental health support including extra wellness days and access to EAP.
• 40-hour week with overtime compensation; flexible working hours; independent home office management; pet-friendly offices.
• State-of-the-art office space and ergonomically equipped workstations; Dentsu Academy; online language courses; Learning Allowance (40 extra hours/year).
• Corporate benefits platform; referral bonus program; workation possibilities; team events.
• Commitment to diversity, equity and inclusion and a workplace free from discrimination.