AI Engineer (Mid-Senior Level)

banyan infrastructure; California (MO); Hybrid; USD 180,000 - 215,000; Full time

Benefits offered by this job

Health plans

Flexible time-off policy

Professional development

Job summary

Banyan Infrastructure, a fintech company in California, is seeking a talented individual to join their team in a foundational role focusing on AI in sustainable finance. You will design and implement AI-powered services, develop APIs, and collaborate with a small but dedicated AI team to automate financial analysis workflows.

This hybrid position allows you to work closely with leadership to develop products that promote green finance while enjoying a competitive salary between $180,000 and $215,000, along with an excellent benefits package.

Qualifications

• Strong programming experience in Python or Java; comfort in learning the other.
• Demonstrated experience with LLMs, AI APIs, or applied ML workflows.
• Solid understanding of REST APIs, testing frameworks, and cloud deployment (AWS preferred).
• Clear communicator who enjoys solving problems collaboratively.

Responsibilities

• Design and implement AI-powered services to automate complex financial analysis.
• Develop secure, scalable, and maintainable APIs primarily in Python.
• Collaborate with the existing AI team to explore and productize AI solutions.
• Integrate with LLM APIs and vector databases.
• Participate in code reviews and pair programming.

Skills

Python

Java

LLMs

AI APIs

REST APIs

Cloud deployment (AWS)

Clear communication

Education

Bachelor's degree

Tools

Postgres

Vue.js

Job description

Banyan Infrastructure is on a mission to unlock the trillions of dollars needed to finance the renewable infrastructure revolution. We are a dynamic fintech company providing a cutting-edge software solution that empowers banks, funds, and other financial institutions globally to efficiently invest in sustainable projects and achieve their net-zero targets. Join us in building the future of green finance.

Why This Role Matters

You’ll join a small, high-impact team expanding Banyan's core platform with applied AI – including work in document parsing, data extraction, generative AI, and conversational interaction with complex financial and operational data. This is a foundational role and a rare chance to deeply shape and define how applied AI transforms the financing of sustainable infrastructure.

What you’ll do:

• Design and implement AI-powered services using modern paradigms like Model Context Protocol (MCP), Retrieval-Augmented Generation (RAG), Reasoning and Acting (ReAct), and agentic frameworks to automate complex financial analysis and due diligence workflows.
• Develop secure, scalable, and maintainable APIs (primarily Python; Java experience also valued).
• Collaborate closely with the existing two-person AI pod to explore, prototype, and productize AI solutions.
• Integrate with LLM APIs (OpenAI, Gemini) and vector databases to enhance automation initiatives.
• Partner cross-functionally with Product, Customer Success, and Sales teams to identify opportunities for AI assistance and build AI expertise across the company.
• Advocate for and apply healthy coding practices and Agile methodologies.
• Participate actively in code reviews, pair programming, and knowledge development to implement new code and debug existing systems.
• Provide 2nd tier production support and proactively identify ways to improve our systems.
• Build financial and cleantech subject matter expertise and stay abreast of new AI technologies and industry trends to inform engineering decisions.

What you’ll need:

• Strong programming experience in Python or Java; comfort in learning the other.
• Demonstrated experience with LLMs, AI APIs, or applied ML workflows.
• Solid understanding of REST APIs, testing frameworks, and cloud deployment (AWS preferred).
• Provide thought leadership that challenges existing processes and delivers clear, structured decision-making frameworks to evaluate implementation tradeoffs.
• Curiosity, pragmatism, and ability to move from prototype to production.
• Clear communicator who enjoys solving problems collaboratively.
• Genuine enthusiasm for Banyan's mission and a willingness to help and mentor other team members.
• Bachelor's degree required.

Bonus skills:

• Experience with Postgres or other modern relational databases.
• Familiarity with Vue.js or modern front-end frameworks.
• Prior experience in financial services or FinTech.
• Exposure to data pipelines, document parsing, or retrieval systems.

How we’ll support your growth and success:

This is more than a job—it's a chance to build expertise at the intersection of fintech and climate tech.

• Direct exposure working closely with founders, executives, and cross-functional teammates.
• Develop cutting-edge industry expertise in fintech, capital markets, and clean infrastructure deployment.
• You will be working on a meaningful product that is actively accelerating clean infrastructure deployment around the world.
• Learn from and with a diverse team of smart, passionate people.

Reporting & Location: This role reports to VP, Engineering and is a hybrid position based in our San Francisco office (3 days in office/2 remote).

Compensation: $180,000 - $215,000 base salary, commensurate with experience, and meaningful equity.

Visa Sponsorship: At this time, Banyan is unable to provide H1B visa sponsorship for this position.

Our benefits package is designed to allow team members to be their best selves, in and out of the workplace. In addition to top tier health plans and at work meal offerings, we prioritize your well-being and growth through professional development, parental leave, a flexible time off policy, and flexible work. Our headquarters is centrally located between Bart and Caltrain in San Francisco, CA.

Confidence can sometimes hold us back from applying for a job. We'll let you in on a secret: there's no such thing as a 'perfect' candidate. We believe diverse perspectives and backgrounds are critical to building great technology. Our goal is to cultivate an environment where people feel valued and respected. So, however you identify and whatever background you bring, please apply if this role would make you excited to come to work. Banyan is an equal opportunity employer.