Senior Backend Engineer - Greenfield Fintech Buildout

Senior Backend Engineer

The Senior Software Engineer will join a high-performing backend engineering team responsible for building and scaling modern, cloud-native platforms that power customer-centric financial products. You’ll play a key role in designing and delivering resilient, secure, and high-performance systems, working within collaborative squads focused on solving real-world problems at scale.

This role sits within an innovative, fast-growing environment that blends the agility of a startup with the backing and stability of a global financial institution. You’ll be instrumental in shaping architecture, influencing engineering standards, and mentoring engineers while delivering impactful solutions.

Company Highlights:

1. Backed by a globally established financial institution with significant investment in digital innovation
2. Startup-like environment with a strong engineering-first culture sitting on top of an established user base (circa 70M+ Users)
3. Customer-centric mission focused on building modern financial products from the ground up
4. Highly collaborative structure with cross-functional squads and real ownership
5. Strong emphasis on diversity, inclusion, and continuous learning
6. Cutting Edge Technology - Java 25 and Kotlin, cloud-native infrastructure as well as unlimited Claude 4.6 usage

Role Overview:

Opportunity to be a founding engineer as part of a Greenfield build out of a Fintech, backed by a major Investment Bank. You will have autonomy and ownership of the platform with the scope of influencing architectural decisions and seeing it through to production.

Key Responsibilities:

1. Design and build scalable, high-quality backend systems using modern engineering practices
2. Apply domain-driven design principles to create robust and adaptable services
3. Ensure systems are resilient, fault-tolerant, and free from single points of failure
4. Develop secure, production-ready code with a focus on performance and reliability
5. Own the full lifecycle: from design and development to deployment and optimisation
6. Troubleshoot production issues and implement long-term fixes to prevent recurrence
7. Enable seamless, zero-downtime deployments for critical services
8. Optimize data access patterns and storage solutions for performance and scalability
9. Continuously improve system observability, monitoring, and operational excellence
10. Mentor engineers and contribute to a strong engineering culture

Tech Stack:

1. Strong experience with JVM-based languages (Java and/or Kotlin)
2. Experience building microservices and distributed systems at scale
3. Cloud-native development (AWS, GCP, or Azure)
4. Containerization and orchestration (Docker, Kubernetes)
5. CI/CD pipelines and modern DevOps practices
6. Experience with event-driven architecture and messaging systems (e.g. Kafka)
7. Strong understanding of APIs, RESTful services, and system design
8. Database experience (SQL and/or NoSQL)
9. Familiarity with observability tools and monitoring frameworks

Ideal Candidate Profile:

1. Strong problem-solving mindset with the ability to take ownership of complex challenges
2. Passion for clean code, maintainability, and long-term system design
3. Collaborative approach with a focus on knowledge sharing and team success
4. Adaptable and comfortable working in fast-paced, evolving environments
5. High standards for engineering quality and ethical decision-making
6. Commercial awareness and interest in fintech or digital banking