Senior AI Engineer for Fintech Platform

Lumin Digital; United States; On-site; USD 170,000 - 190,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with company match

flexible PTO plus 12 paid holidays

paid sick leave

paid parental and family leave

lifestyle spending account

tuition reimbursement

cell phone stipend

Job summary

Lumin Digital is seeking a Senior Software Engineer for AI to design, build, and ship AI-powered features that impact our platform and clients’ members.

You will collaborate with product, security, and data teams to integrate LLMs and AI APIs, with strong prompt engineering, output validation, and safety guardrails.

The role requires 5+ years in software engineering, 1–2+ years in AI/ML integration, TypeScript/Node.js, RESTful APIs, and AWS, with a focus on fintech compliance.

Qualifications

• 5+ years of professional software engineering experience

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 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

Skills

TypeScript

Node.js

AI/ML integration

LLM APIs

Prompt engineering

Cloud AWS

REST APIs

Microservices

Communication

Education

Bachelor's degree in Computer Science or 5 years equivalent experience

Tools

Anthropic Claude API

OpenAI API

AWS

Job description

Lumin Digital is seeking a Senior Software Engineer for AI to design, build, and ship AI-powered features that impact our platform and clients’ members.

You will collaborate with product, security, and data teams to integrate LLMs and AI APIs, with strong prompt engineering, output validation, and safety guardrails.

The role requires 5+ years in software engineering, 1–2+ years in AI/ML integration, TypeScript/Node.js, RESTful APIs, and AWS, with a focus on fintech compliance.