(Senior) Kotlin / Java Software Engineer (Application Framework) (m/f/x)

(Senior) Kotlin / Java Software Engineer (Application Framework) (m/f/x)

Position: Full-time

Responsibilities

• Architect and pioneer the future of microservices at Scalable, focusing on performance, security, and cost‑efficiency
• Collaborate with cross‑functional teams to identify and understand application requirements for our platform
• Lead the design and development of "Service in a day" application templates (Spring Boot, Node.js, Python Lambdas), setting the standard for speed and integration across the company
• Pioneer the adoption and best practices for AI Coding tools to accelerate developer workflows
• Drive critical technology migrations (e.g., Spring Boot upgrades), centralizing best practices and enabling 40+ application teams
• Take full ownership of core architectural components and central integration libraries used across all application teams
• Research and develop service and storage improvements using serverless technologies and optimise our services and CI/CD for scalability, cost and performance
• Be the central expert for vulnerability analysis of key frameworks (e.g. Spring Boot, Node.js/Next.js, Python Lambdas, Apollo, Express), identifying false positives and creating reusable security solution patterns for our extensive application landscape
• Mentor and enable our software development teams to foster our DevOps culture by educating them and providing reusable and unified building blocks to improve standardisation, performance and security
• Stay up‑to‑date with the latest industry trends, tools, and techniques related to application frameworks and best practices
• Design and implement best practices around application performance and security
• Take ownership of central services like GraphQL Hive and gateway, Envoy, AWS services (ECS, ElastiCache, Opensearch) and messaging solutions (SNS, SQS, Kafka)

Qualifications

• Extensive experience in Kotlin/Java (Spring Boot)
• Experience with AWS and infrastructure as code (preferably Terraform)
• Solid understanding of scalable system design principles, distributed systems, and cloud technologies
• General understanding of software systems and how they interact (e.g. microservice architectures, event‑driven architectures)
• A passion for automating, improving processes and working collaboratively with other developer teams
• Excellent communication and visualisation skills for complex systems
• A degree in a relevant field of study (e.g. computer science, engineering, sciences) or equivalent work experience
• Full professional proficiency in English and the ability to communicate concisely in an international, English‑speaking environment
• Excellent collaboration skills, with the ability to work effectively in a cross‑functional team environment

Benefits

• Be part of one of the fastest‑growing and most visible FinTech startups in Europe
• 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 in‑house knowledge sharing or career development sessions and allocating an individual education budget
• Learn and experience German culture first hand by joining free German language classes
• International relocation support is provided if required
• Opportunity to work from abroad
• Benefit from an attractive compensation package and the company pension scheme
• Monthly contribution of 50% for the ‘Deutschland Jobticket’
• Complimentary subscription to Scalable Capital's PRIME+ Broker
• Flexible and discounted sports activities with Urban Sports Club