Back End Developer

Key Partners is searching on behalf of a client in the financial industry for an experienced Backend Engineer to join their team on a temporary contract basis. You will help deliver reliable, scalable services in a regulated, high standard environment.

Contract details

• Type: Independent contractor
• Duration: 9 months, with possible extension
• Start date: ASAP
• Location: Zurich
• Rate: Competitive day rate, to be discussed

What you will do

• Design, build, and maintain backend services and APIs
• Contribute to architecture decisions and code reviews
• Work with stakeholders and teammates in German on requirements and delivery
• Improve performance, reliability, and test coverage of existing systems
• Document your work and hand over cleanly at the end of the engagement

What you bring

• 5+ years of professional backend development experience
• Strong skills in [Java / Kotlin / Python / Go / Node.js / .NET]
• Experience with REST APIs and/or microservices
• Solid knowledge of [PostgreSQL / Oracle / MongoDB] and [AWS / Azure / GCP]
• Familiarity with CI/CD, Docker, and [Kubernetes]
• Fluent German (C1 or higher), written and spoken, as it is the team’s working language
• Good working English
• Ability to work independently and become productive quickly

Nice to have

• Experience in banking, insurance, or another financial services environment
• Background with event driven systems such as Kafka
• Previous contracting or freelance experience