We are looking for a Senior Backend Engineer to join the Core Banking Services team and help build and scale a high-performance Banking-as-a-Service (BaaS) platform.&nbsp;We build and scale the high-performance, serverless API layer that empowers both internal consumers and partner banks to manage customers and their accounts. As a pure backend engineering team, we don't build UI components. Instead, we focus entirely on engineering robust, highly available, and secure distributed services. The team owns the end-to-end lifecycle of core banking entities, including: - Identity &amp; Compliance: Automated customer onboarding and complex KYC workflows. - Ledger &amp; Accounts: Scalable deposit account management systems. - Reporting: High-throughput data processing for reporting obligations, observability, and account statement generation. Responsibilities: <ul> <li>Build and maintain the BaaS API services, including REST API and event-driven systems with a serverless architecture that other teams and partners depend on, making sure they're reliable and accurate.</li> <li>Help shape how we solve problems: contribute ideas on how things should be built, weigh in on important decisions, and make sure we're building things the right way for the long term.</li> <li>Keep our CI/CD processes healthy: spot when things are slow or breaking, and take action to make the team's day-to-day smoother and faster.</li> <li>Drive architectural decisions and solution design within your domain, including writing technical solution designs, participating in threat modeling workshops, and collaborating cross-team on upstream/downstream dependencies.</li> <li>Take ownership of production reliability by participating in an On-Call rotation, leading incident investigations, identifying root causes, and driving hotfixes, as the team does with live incidents on the platform.</li> <li>Work with external partners and services we connect to, and take ownership when something on their side needs following up or resolving.</li> <li>Keep our build, testing, and release processes healthy: spot when things are slow or breaking, and take action to make the team's day-to-day smoother and faster.</li> </ul> Must have:&nbsp; <ul> <li>Minimum 5 years of hands-on experience as a backend engineer, with at least 2 years of NodeJs/TypeScript experience.&nbsp;</li> <li>Highly responsible for working with critical high-core value systems for the company.</li> <li>Solid experience with AWS Serverless services - Lambda, SQS, API Gateway, EventBridge, DynamoDB, S3.</li> <li>Solid understanding and practical application of design patterns</li> <li>Hands-on experience with Infrastructure as Code (preferably Terraform &amp; CDK).</li> <li>Hands-on experience with TypeScript testing practices (unit, integration, system testing).</li> <li>Experience with event-driven architectures (e.g., Kafka)</li> <li>Familiarity with RESTful API design and OpenAPI specifications.</li> </ul> Soft skills: <ul> <li>Excellent communication skills. Ability to articulate challenges and solutions clearly.</li> <li>Proven team player. Collaborates well with others and supports shared goals.</li> <li>Critical thinking and problem-solving capabilities; able to design robust solutions and analyze production issues.</li> <li>Proactiveness in supporting teammates and driving technical improvements.</li> <li>Fluency in English.</li> </ul> Good to have: <ul> <li>&nbsp;Experience working in a monorepo setup (pnpm workspaces or similar).</li> <li>Experience with Relational Databases (MySQL) and an ORM such as Prisma.</li> <li>Experience with NoSQL databases (e.g., DynamoDB or similar)</li> <li>German-language skills are a plus but not mandatory.</li> </ul> <div class="content-conclusion">We offer*: <ul> <li>Flexible working format - remote, office-based or flexible</li> <li>A competitive salary and good compensation package</li> <li>Personalized career growth</li> <li>Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)</li> <li>Active tech communities with regular knowledge sharing</li> <li>Education reimbursement</li> <li>Memorable anniversary presents</li> <li>Corporate events and team buildings</li> <li>Other location-specific benefits</li> </ul> *not applicable for freelancers</div>