Senior Software Engineer - Full Stack - .NET

📋 Description

• • As a Senior Software Engineer - Full Stack - .NET at Bankjoy Inc., you will play a pivotal role in advancing the company’s mission to revolutionize banking technology infrastructure by enabling community banks and credit unions to become tech-driven and digital-first through modern digital banking products such as mobile banking, online banking, online account opening, loan origination, and conversational AI.
• • Your work will directly impact the scalability, security, and usability of Bankjoy’s digital banking platform, ensuring compliance with financial regulatory standards while delivering seamless experiences for end-users across North America.
• • You will lead the implementation of new features and enhancements across the Digital Banking platform, taking ownership of end-to-end development cycles from design to deployment, with a focus on writing clean, maintainable, and testable code that reduces technical debt over time.
• • You will design, develop, and maintain responsive and accessible front-end applications using modern frameworks such as Angular or React, leveraging TypeScript, HTML5, and CSS3 to create intuitive user interfaces that align with accessibility standards and brand guidelines.
• • You will architect and build scalable, secure RESTful and GraphQL APIs using .NET Core and C#, ensuring proper authentication, authorization, input validation, and error handling to support high-volume transaction processing and third-party integrations.
• • You will proactively identify performance bottlenecks, refactor legacy code, and implement industry best practices in coding, testing, and DevOps to improve system reliability, maintainability, and team velocity.
• • You will collaborate closely with product managers, UX/UI designers, QA engineers, DevOps specialists, and third-party vendors to translate business requirements into technical solutions, participate in sprint planning, daily stand-ups, retrospectives, and demo sessions within an Agile Scrum framework.
• • You will champion test-driven development (TDD) and behavior-driven development (BDD) by writing unit, integration, and end-to-end tests using frameworks such as xUnit, NUnit, Jest, or Cypress, aiming for high test coverage and early defect detection.
• • You will provide technical mentorship to junior and mid-level engineers through code reviews, pair programming, knowledge-sharing sessions, and guidance on architectural decisions, fostering a culture of continuous learning and engineering excellence.
• • You will contribute to process improvements by advocating for CI/CD pipeline enhancements, infrastructure-as-code adoption, observability practices (logging, monitoring, tracing), and blameless postmortems to increase system resilience and team efficiency.
• • You will work in a remote-first, high-growth startup environment backed by Y Combinator and Bessemer Venture Partners, where innovation, ownership, and adaptability are valued, and your contributions will directly influence the product roadmap and company trajectory.
• • Through this role, you will deepen your expertise in full-stack .NET development, cloud-native architectures, and FinTech-specific systems such as transaction processing and user access management, positioning yourself as a technical leader in the digital banking space.
• • You will gain exposure to regulated financial services environments, learning how to balance innovation with compliance, security, and audit readiness — skills that are highly transferable and in demand across the fintech and enterprise software industries.