(Senior) Kotlin / Java Software Engineer - Trading Platform (m/f/x)

Be part of a highly motivated, cross-functional team building and operating Scalable Capital’s Trading Platform.

Design, build, and evolve business-critical services supporting the trading lifecycle—from order intake and validation through execution, status updates and post trade processing.

Develop reliable, scalable, and observable backend services using Kotlin, Java, and Spring Boot in a distributed, event-driven environment.

Work with product, operations, risk, and other engineering teams to translate complex trading processes into clear, resilient software models and APIs.

Build integrations with internal platforms and external trading venues, ensuring robust processing of time-sensitive financial data.

Take ownership from idea to production: contribute to architecture, implementation, testing, deployment, monitoring, and continuous improvement.

Help ensure the platform meets high standards for correctness, performance, availability, security, and auditability.

Work in an autonomous agile team using modern software-development practices, including code reviews, automated testing, continuous integration and delivery, cloud-based infrastructure, and infrastructure as code.

Raise engineering standards by improving reliability, automation, observability, developer experience, and operational processes.

A university degree in computer science, engineering or a comparable qualification.

Strong professional experience building production backend services with Kotlin or Java and Spring Boot.

Experience designing and operating distributed, event-driven, high-availability systems with clear API and service boundaries.

Solid understanding of Domain-Driven Design and the ability to model complex business workflows in maintainable software.

Demonstrated ability to work on latency-sensitive, high-throughput systems, including performance analysis, monitoring, capacity considerations and failure-mode design.

Experience designing, operating and optimising data persistence for backend services, including relational databases such as PostgreSQL/MySQL and NoSQL databases such as DynamoDB.

A strong engineering-quality mindset: clean, secure, testable, documented, maintainable code and ownership of services in production.

Familiarity with cloud-native development and operations, ideally AWS, Docker, Terraform, CI/CD pipelines, monitoring, and observability tooling.

Strong analytical skills and clear, audience-appropriate communication with engineering, product, operations and business stakeholders.

Experience with designing and operating gRPC services, including protobuf-based API design, backward-compatible schema evolution, error handling and observability, is a plus.

Experience with financial-market systems requiring strict operational controls and auditability is a strong plus.

Be part of one of the fastest-growing and most visible Fintech startups in Europe, creating innovative services that have a substantial impact on the lives of our customers

Work with an international, diverse, inclusive, and ever-growing team that loves creating the best products for our clients

Be productive with the latest hardware and tools

Learn and grow by joining our in-house knowledge sharing or career development sessions and spending your individual Education Budget

Learn and experience German culture first hand by joining our free German language classes

International relocation support is provided if required

Opportunity to work from abroad

Benefit from an attractive compensation package and from the company pension scheme

Monthly contribution of 50% for the ‘Deutschland Jobticket’

Say goodbye to order commissions and say hello to your complimentary subscription of Scalable Capital's PRIME+ Broker

Enjoy flexible and discounted sports activities with Urban Sports Club