Senior / Staff Software Engineer, AI Systems

Lighthouse

$150K — $180K *
Legal & Accounting
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 4+ years of experience shipping production software with a focus on backend systems.
  • Experience building AI/ML powered applications beyond basic interfaces.
  • Ability to collaborate with domain experts to translate nuanced processes into software.
  • Proficiency in Python and TypeScript or similar programming languages.
  • Experience leading projects from requirements gathering to deployment and maintenance.
  • Solid understanding of workflow orchestration and asynchronous systems.
  • Demonstrated high agency in problem-solving and implementing solutions independently.

Responsibilities

  • Build agentic systems to automate complex legal workflows with appropriate human intervention.
  • Redesign task and workflow orchestration to manage long-running jobs and support recovery mechanisms.
  • Create evaluation systems to measure output quality and guide improvements to AI agents.
  • Enhance backend services architecture, focusing on event pipelines and job scheduling.
  • Ensure agent execution is observable for debugging and quality management.
  • Integrate developed systems with internal tools and the applicant-facing portal, including necessary APIs.

Benefits

  • Visa sponsorship available.
  • Competitive base salary and equity package, scaled with experience.
  • Comprehensive medical, dental, and vision benefits.
  • 401k plan with a 3% company match.
  • Office stipend for equipment or workspace needs.
  • Annual team retreats to unique locations.
  • Work options available in San Francisco or New York.
Full Job Description
We're looking for a senior or staff-level software engineer to build the AI systems that help the world's best and brightest build in the U.S.

You'll own the agents and infrastructure that power complex legal workflows: drafting documents, reviewing evidence, and moving cases toward filing. This includes workflow orchestration, backend services, and evaluations that measure quality and catch regressions. You'll work directly with our legal team to understand their processes and turn early experiments into reliable production systems.

What you'll do:
  • Build agentic systems that automate complex, multi-step legal workflows, with human review and intervention at the right points.
  • Redesign our task and workflow orchestration to support long-running work, dependencies, retries, and recovery.
  • Build evaluation systems to measure output quality, catch regressions, and guide improvements to agents, prompts, and models.
  • Improve the architecture of our backend services, event pipelines, and scheduled job infrastructure.
  • Make agent execution observable, so we can understand what happened, debug failures, and manage quality, latency, and cost.
  • Connect these systems to our internal tools and applicant-facing portal, including the APIs and interfaces people need to supervise their work.


You might be a good fit if:
  • You have 4+ years shipping production software, with deep experience in backend systems and experience building AI/ML powered applications.
  • You've built with LLMs beyond a basic chat interface and thought carefully about tool use, context, evaluation, and handling unreliable outputs.
  • You can work with domain experts to turn nuanced processes and quality judgments into software behavior and meaningful evaluations.
  • You're comfortable working in Python and TypeScript, or similar languages.
  • You've led projects end to end, from ambiguous requirements through deployment and ongoing operation.
  • You have a solid understanding of workflow orchestration and asynchronous systems, including queues, events, retries, idempotency, and failure recovery.
  • You have high agency: you can independently research unfamiliar problems, test approaches, and drive them to a working solution.

Experience operating agents in production, building eval infrastructure, or working on complex document workflows is especially relevant. Strong engineering judgment matters more to us than experience with a particular framework.

Pay and Benefits
  • We sponsor visas, obviously.
  • Competitive base and equity, scaled with experience.
  • Competitive medical, dental, and vision benefits.
  • 401k with a 3% company match.
  • Equipment/office stipend.
  • Annual team off-site in cool places.
  • In person in San Francisco or New York.

Apply through our Careers page. If selected, we'll schedule a call to get to know you better and do a deep technical dive into the work you've chosen to highlight.

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