Senior Software Engineer

Job Title: Senior Software Engineer (Java & Kotlin) 
Salary: Up to £80k 
Location: Cambridge (2-3 days on site)
Industry: Fintech - startup

We’re looking for a Senior Software Engineer with strong experience in Java and Kotlin to join our clients collaborative engineering team. In this role, you’ll contribute to the development and evolution of the CDM-based event processing engine and supporting platform components. This is a hands-on position focused on system design, implementation, and solving complex challenges within financial services infrastructure. You’ll work closely with platform architects, product partners, and subject matter experts.
Key Responsibilities

Design, develop, and maintain core components of our CDM engine using Java and Kotlin
Build modular, reusable services and libraries that handle trade ingestion, transformation, validation, and orchestration
Work with domain experts to translate financial logic into deterministic, model-driven software
Contribute to architectural discussions, promoting scalable and maintainable design choices
Write clean, testable, production-quality code with a strong focus on quality and automation
Deploy and manage services in cloud-native environments using Docker, Kubernetes, and AWS
Participate in code reviews, knowledge sharing, and the continuous improvement of our engineering practicesWhat You’ll Bring
Must-Haves

5+ years of hands-on experience developing production systems using Java or Kotlin (ideally both)
Strong knowledge of object-oriented and functional programming principles
Experience building distributed systems and RESTful APIs
Familiarity with event-driven architectures and messaging tools (e.g., Kafka)
Proficiency in modern CI/CD workflows, containerization (Docker), and orchestration tools (Kubernetes)
Solid understanding of version control (Git) and established software engineering practices
Strong problem-solving skills and ability to communicate and collaborate effectively within a teamNice-to-Haves

Exposure to financial services, trading systems, or financial data modeling
Experience with CDM (Common Domain Model), FpML, FIXML, or ISO 20022
Understanding of blockchain technologies or tokenization concepts
Background in financial mathematics, risk modeling, or trade lifecycle workflows