Senior Backend Engineer - Kotlin & Spring Boot | Flex Hours

Merkle Switzerland AG; Sankt Gallen; Vor Ort; CHF 120.000 - 180.000; Vollzeit

Benefits dieser Stelle

25 days holidays

Volunteer days

Mental Health support

40-hour week & overtime compensation

Flexible working hours (flextime)

Home office management

Ergonomic office space

Pet friendly offices

Learning Allowance

Zusammenfassung

Merkle Switzerland AG is seeking 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 OpenShift.

You will own services end-to-end and mentor junior engineers. Responsibilities include API design, data model ownership, observability, and secure integration with OAuth2/OIDC.

Qualifikationen

• 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+, primary language for team communication, documentation, and stakeholder interaction.
• English business proficient, used for technical standards and international tooling.

Aufgaben

• 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 optimisation, 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.

Kenntnisse

Kotlin

Spring Boot

Apache Kafka

PostgreSQL

MySQL

Kubernetes/OpenShift

Distributed systems

OAuth2/OIDC security

Git

CI/CD

German B2+

English (business)

Ausbildung

Bachelor's degree in CS or IT

Tools

OpenShift

Kafka Streams

Schema Registry

Flyway/Liquibase

Spring Cloud

Jobbeschreibung

Merkle Switzerland AG is seeking 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 OpenShift.

You will own services end-to-end and mentor junior engineers. Responsibilities include API design, data model ownership, observability, and secure integration with OAuth2/OIDC.