We are currently seeking an experienced Backend Software Engineer to join an FinTech scale-up client of ours on a permanent basis. This is with a cutting edge Series B scale-up, whose platform is used by legacy financial institutions in order to provide more modern customer experiences across Payments, Credit Unions and FinTechs.

The role requires candidates to be based within a commutable distance to Seattle, as the client has a hybrid office policy.

Key Responsibilities:

  • Design, implement, and maintain backend services written in Java and Go, focusing on performance, reliability, and maintainability.
  • Build and evolve the core integration engine powering data sync, event streaming, and workflow orchestration across financial systems.
  • Architect and optimize AWS-native infrastructure (Lambda, ECS/EKS, DynamoDB, SQS/SNS, API Gateway, Step Functions, etc.).
  • Develop secure, high-throughput APIs and SDKs for external fintech and enterprise customers.
  • Implement distributed system patterns such as CQRS, event sourcing, idempotent workflows, and resilient messaging.
  • Collaborate with the platform, DevOps, and product teams to define technical requirements and deliver end-to-end solutions.
  • Contribute to internal frameworks, shared libraries, and developer tooling to improve engineering velocity.
  • Ensure compliance with fintech-grade security, auditability, and reliability standards.
  • Participate in code reviews, architectural discussions, and mentoring junior engineers.


Desirable Requirements:

  • Strong background in Software Engineering - main expertise should be within Java, Golang or Python
  • Experience with working in a start-up is important for this role – proven experience building from 0 to 1 is important
  • Expertise within AWS and containerisation/infrastructure-as-code is a plus (Docker/Kubernetes/Terraform)
  • Experience with working within core banking systems, payments (ACH/Wires) is important for this role

The role offers long-term earning potential with a strong compensation package, including a strong equity component.