Senior Backend Engineer - AI Stream

Nesto Cloud

13h • Hybrid

About The Position

As a Senior Backend Engineer on the AI Stream at nesto, you will be responsible for owning the development of high-impact technical features and subsystems within our AI agent platform. You will also mentor junior engineers through code reviews and collaborative problem-solving, helping them grow into successful, independent contributors. This role involves working on Maestro, nesto's document validation platform for mortgage underwriting, which combines deterministic, rules-based validation with AI-powered document classification and matching. You will operate at the intersection of conventional backend systems and AI-assisted processing, utilizing technologies like Gemini, Claude, and OpenAI.

Requirements

• Bachelor's degree in Computer Science or related field (or equivalent experience).
• 3–5 years of experience as a software developer, with backend web development experience.
• Strong experience in backend programming, ideally with Python, FastAPI or a comparable web framework.
• Familiarity with relational databases (ex. MySQL).
• Solid understanding of software engineering fundamentals: testing, design patterns, agile development process.
• Good interpersonal and communication skills, comfortable working with engineers senior to them.
• Genuine interest in AI/ML-adjacent backend work — no ML expertise required, but curiosity about how deterministic and AI-based systems interact.
• Track record of independently owning a feature or subsystem.

Nice To Haves

• Exposure to LLM/embedding APIs (Vertex AI, OpenAI, or similar) is a plus.

Responsibilities

• Own the development of high-impact technical features and subsystems within our AI agent platform.
• Mentor junior engineers through code reviews and collaborative problem-solving.
• Make sound technical trade-offs within the AI Stream domain, communicating them clearly to your team lead.
• Contribute to code reviews and give useful feedback to peers.
• Collaborate with cross-functional team members to hit delivery timelines without compromising quality.
• Troubleshoot, debug, and improve performance/reliability within your area.
• Grow your understanding of how nesto's deterministic rules engine and AI perception/matching layers work together (Vertex AI-based classification, embedding-based name/address matching).

Benefits

• Premium benefits plan fully paid by nesto, including comprehensive insurance and unlimited access to telemedicine and mental health services for you and your family.
• 4 weeks of vacation.
• Access to the resources and tech you need to execute without friction.
• An environment that makes you productive and enables teamwork.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior