Senior Software Engineer

We are looking for a Senior Software Engineer for AI to join our engineering team. In this role, you will design, build, and ship AI-powered features that directly impact our platform and our clients' members. You'll collaborate closely with product, engineering, security, and data teams to integrate large language models and other AI/ML capabilities into Lumin's core products and developer tooling. Essential Functions and Responsibilities: Design and build AI-powered features across Lumin's digital banking platform, including natural language interfaces, intelligent assistants, and automated workflows Integrate LLMs and AI APIs (Anthropic Claude, OpenAI, etc.) into production systems with robust prompt engineering, output validation, and safety guardrails Evaluate AI outputs critically, ensuring accuracy, reliability, and compliance with financial services regulations Collaborate cross-functionally with product managers, designers, QE engineers, and other engineering teams to deliver end-to-end AI features Contribute to Lumin's internal AI knowledge base, documenting patterns, best practices, and learnings for the broader engineering organization Champion security and compliance in AI feature development, with awareness of fintech regulatory requirements (SOC 2, data privacy, etc.) Conduct and participate in code reviews, raising the technical bar for AI-related work across the organization Evaluate and recommend new AI tools and frameworks as the ecosystem evolves, helping Lumin stay at the forefront of applied AI in financial services Position Specifications Education: Bachelor's degree in Computer Science or 5 years equivalent experience Experience: 5+ years of professional software engineering experience 1–2+ years of hands-on experience with AI/ML integration or LLM-based product development Proficiency with LLM APIs such as Anthropic Claude or OpenAI, including prompt engineering and tool/function calling Proficiency in TypeScript/Node.js Experience with RESTful APIs, microservices architecture, and cloud infrastructure (AWS preferred) Demonstrated ability to critically evaluate AI-generated outputs — knowing when to trust, verify, and push back Strong written and verbal communication skills; ability to explain complex AI concepts to non-technical stakeholders Travel : Minimal, generally 12 days or less per year, ~2X team get togethers a year $170,000 - $190,000 a year LIFE AT LUMIN DIGITAL Lumin Digital is a trailblazer in digital banking solutions, driven by a unique approach to technology, service, and people. We empower credit unions and banks by creating cutting-edge digital experiences that continuously serve, engage, and grow their membership base. Lumin is 100% cloud-native, purpose-built to unlock the full advantages of the cloud for financial institutions and their users. At Lumin, we thrive on curiosity and innovation. Our culture fosters trust - in our expertise and decisions, respect - for diverse perspectives and talents, and boldness - in pursuing innovative paths. These values guide us, shaping a workplace where collaboration thrives, ideas flourish, and new possibilities are discovered. Focused on continuous improvement and innovation, we encourage our team to explore, experiment, and put new ideas into action, challenging the usual way of doing things. Lumin Digital is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, national origin, disability, protected veteran status, sexual orientation, gender identity, or any other legally protected basis, in accordance with applicable law. For more information, visit lumindigital.com. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.