Senior Backend Engineer

N Ix — United States · Posted ~11 hours ago

Senior Full-time

Skills

Java Spring Boot Backend development REST APIs API integration Automated testing Production support Performance optimization Security Reliability Unit testing Integration testing Contract testing

🔓 Log in to save this job, tailor your resume & track your apply process — 7 days free, no card needed.

Log in to add to target list

Summary ✨ AI‑Generated

A senior backend engineering role on a B2B financial technology team. You will design and develop Java-based services and APIs, integrate with external financial partners, support production systems, improve performance and reliability, participate in on-call rotations, and mentor other engineers.

Highlights

Senior backend opportunity building partner-facing financial platforms, with full lifecycle ownership, modern Java technologies, production support, technical mentoring, and a strong focus on reliability and security.

Description

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 flexibleA competitive salary and good compensation packagePersonalized career growthProfessional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)Active tech communities with regular knowledge sharingEducation reimbursementMemorable anniversary presentsCorporate events and team buildingsOther location-specific benefitsnot applicable for freelancers