Senior Backend Engineer

We are looking for a Senior Backend Software Engineer to join the B2B Portals Team working with Raisin, a fintech company operating a digital savings and investment marketplace. You will contribute to partner-facing platforms that allow banks, brokers, and financial advisors to offer Raisin deposit products to their customers. The team owns the full development lifecycle - from solution design and implementation to deployment and production support. Responsibilities: • Develop and maintain backend services using Java and Spring Boot; • Deliver features from technical design to production rollout; • Build APIs and integrations for banks and other B2B partners; • Write unit, integration, and contract tests; • Investigate production issues using logs, metrics, and traces; • Conduct code reviews and contribute to engineering standards; • Improve service performance, security, and reliability; • Participate in the team’s on-call rotation; • Mentor engineers and support knowledge sharing; • Promote the effective and safe use of AI-assisted development tools; • Collaborate with distributed teams and stakeholders across Europe and the US. Requirements: • 5+ years of commercial Java development experience; • Strong knowledge of Java, Spring Boot, and Spring Data; • Experience with AWS and cloud-based applications; • Experience with REST APIs, distributed systems, and service integrations; • Knowledge of relational databases, preferably MySQL; • Experience with asynchronous messaging, particularly Amazon SQS; • Strong testing skills with JUnit and Testcontainers; • Experience with CI/CD, Docker, and Kubernetes; • Ability to independently own and deliver backend features; • Experience debugging production systems; • Mentoring and code review experience; • Fluent English. Nice to have: • Experience with fintech or banking integrations; • Knowledge of Pact contract testing; • Experience with Apache Kafka or Amazon MSK; • Experience with event-driven systems; • Experience with OpenTelemetry, Datadog, or Splunk; • Familiarity with GitLab CI/CD, Harness, Amazon EKS, or Airflow; • Experience with multi-tenant B2B platforms; • Practical experience with AI-assisted development tools. We offer*: • Flexible working format - remote, office-based or flexible • A competitive salary and good compensation package • Personalized career growth • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) • Active tech communities with regular knowledge sharing • Education reimbursement • Memorable anniversary presents • Corporate events and team buildings • Other location-specific benefits *not applicable for freelancers