Who You Are You are a Senior Back-End Engineer joining a new product initiative. You will be responsible for building and maintaining scalable, reliable back-end systems that power web and mobile applications. You'll work closely with engineers, product managers, and infrastructure teams to design systems that are secure, high-performing, and built to scale. Your work will directly influence the architecture and evolution of new product offerings. What You'll Do • Design, build, and maintain scalable back-end services, APIs, and data systems that support web and mobile applications • Architect reliable, secure, and high-performance server-side solutions • Collaborate with front-end engineers, product managers, and infrastructure/DevOps teams to deliver end-to-end features • Ensure systems are built with best practices around code quality, testing, observability, and deployment • Contribute to architectural decisions across microservices and event-driven systems • Work with modern cloud and containerized environments to support scalable deployments • Leverage caching, messaging, and data pipelines where appropriate to improve system performance • Stay current with modern back-end engineering practices, distributed systems, and emerging technologies • Use AI tools and automation thoughtfully to improve engineering productivity and decision-making What We're Looking For • 7+ years of back-end engineering experience, including time in senior or lead roles • Strong experience building APIs and services using Node.js, TypeScript, and frameworks such as NestJS or Express • Solid understanding of SQL databases; exposure to NoSQL is a plus • Experience working with microservices and event-driven architectures • Familiarity with cloud platforms (AWS, GCP, or Azure) • Experience with Docker and Kubernetes or similar containerization/orchestration tools • Working knowledge of caching strategies and messaging systems (e.g., Kafka or similar) • Experience using API tools such as Postman and version control systems like Git (or Bitbucket) • Strong engineering fundamentals around scalability, reliability, and system design Bonus Points • Experience working in early-stage or fast-moving product environments (zero-to-one builds) • Exposure to fintech, trading, brokerage, lending, or financial systems