Role Overview
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.
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
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.
N-iX
1 700
N-iX is a European software development service company that helps businesses across the globe develop successful software products. Founded in 2002 in Lviv, N-iX has come a long way and increased its presence in six countries spanning Europe and the US. Today, we are a strong community of 1,700+ professionals and a reliable partner for global industry leaders and Fortune 500 companies. N-iX is actively hiring in Poland and has an office in Krakow.