ppJoin the fintech revolution with Mambu, the leading SaaS cloud banking platform. We're on a mission to make banking better for a billion people. We're engineering the future of financial services with AI at its core. At Mambu, AI isn't a feature — it's how we're rebuilding banking from the ground up. If you're ready to apply cutting-edge technology to problems that affect millions of people, your next chapter starts here. Learn more here . /p pWe are hiring bSenior Backend Software Engineers /b across all teams. As a Senior Backend Software Engineer, you will be responsible for: /p ul liDeveloping bank connectivity and payment automation products, features, and capabilities, with a focus on security, stability, and performance /li liOwning architectural decisions for complex, high-impact projects and driving technical direction across teams /li liCollaborating with Product Managers and DevOps Software Engineers to maintain a fast-paced, iterative, and continuously improved product development and delivery process /li liApplying security by design principles to public and internal APIs /li liSolving architectural and technical challenges to reduce complexity while creating value for customers and users /li liMentoring and upskilling junior and mid-level engineers through code reviews, pair programming,



and technical guidance /li liDefining and executing Numeral's technical roadmap to improve team velocity and control technical debt /li liActing as a technical reference and escalation point for critical incidents and high-stakes production issues. /li li5+ years of professional software engineering experience, with significant hands‑on experience in Golang /li liBackground in fintech, banking, or payments (SEPA, Swift, Ebics…), with an understanding of the regulatory and operational constraints of the industry /li liProven track record designing and owning complex, distributed backend systems in production /li liDeep experience with relational databases and SQL, including high-concurrency environments, transaction management, and isolation levels at scale /li liStrong understanding of the challenges of running a high-volume SaaS platform at scale, with a track record of producing quality, maintainable, well-documented code that respects best practices /li liAdvanced API design skills, with a strong focus on security, versioning, and documentation /li liDemonstrated ability to mentor engineers and elevate team-wide engineering standards /li liYou are curious, interested in business understanding and product oriented /li liYou are highly autonomous, proactive, and comfortable driving ambiguous technical problems to resolution /li /ul h3Nice-to-have skills /h3 ul liDevOps appetite - you have been in involved in implementing / using CI using Gitlab and Kubernetes /li liCloud hosting with AWS and experience with EC2, S3, EKS, RDS… /li liFamiliar with Kafka or similar message broker middlewares /li /ul /p #J-18808-Ljbffr

📌 Senior Software Engineer (Barcelona)
🏢 Mambu Payments (formerly Numeral)
📍 Barcelona