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Lexsy is an AI-native law firm building predictive legal intelligence. We create agentic systems that continuously monitor a company’s data, identify legal events, propose actions, and execute them — with lawyers in the loop. Our platform already supports high-growth startups (including companies now valued at $500M+), and we’re scaling toward a multi-agent architecture spanning workflows, validation, supervision, and real-time triggers across Slack, HR systems, cap tables, data rooms, and financial tools. This is a foundational technical leadership role. As Lexsy’s Staff Engineer, you will own core architectural decisions, lead complex execution, and set the technical standard for how we build AI-powered legal systems. You won’t be handed tickets. You’ll be trusted to define solutions. What you’ll be responsible for: 1. End-to-end problem ownership For any technical problem, you’re expected to independently determine: The right technical approach Whether AI is appropriate — or not Architecture and tooling choices Scope, timelines, and team allocation Risks, edge cases, and trade-offs Your decisions should reflect deep technical judgment and experience operating in ambiguous, high-stakes environments. 2. AI judgment & discretion Not everything should be solved with LLMs — and knowing the difference matters. You will: Partner with product to decide when AI adds value vs. when deterministic systems are safer Anticipate and mitigate common LLM failure modes (hallucinations, brittleness, edge cases) Apply industry-standard patterns for reliability, validation, and human-in-the-loop systems 3. Engineering leadership & execution You’ll lead major initiatives and guide engineers through them. This includes: Working closely with junior engineers, product leads, and legal domain experts Translating legal workflows into scalable, maintainable systems Setting and enforcing high standards for code quality, architecture, and documentation Making decisions independently — without needing constant oversight 4. Ship fast, without cutting corners We value speed, but not chaos. You’ll operate with: Rapid prototyping using LLMs and agents Tight execution cycles and fast feedback loops A strong bias toward shipping — while protecting system integrity and long-term maintainability What you’ll build in your first 90 days Automated legal workflows (e.g., generating documents for a company’s first priced Series Seed round) API integrations with platforms like Slack, Carta, and internal data sources Event-driven systems and scrapers to detect real-time legal signals (e.g., copyright violations) What we’re looking for Core Requirements 5–8+ years of professional software engineering experience 1+ year hands-on building with LLMs (OpenAI, Anthropic, Hugging Face ecosystem) Strong systems design and architectural thinking Experience deploying and scaling systems on AWS or similar cloud platforms High code quality standards; ability to design APIs and interfaces others can build on Experience mentoring or managing junior engineers Comfort operating in fast-moving startup environments Nice to have Experience with legal or compliance-driven workflows Integrations with HR systems, billing, cap tables, or data rooms Availability in US or Canada time zones How you operate We care as much about how you think as what you build. You likely: Have strong technical judgment Thrive in ambiguity and incomplete information Create clarity for others Take full ownership of outcomes, not just tasks What we offer: Full-time job (8 working hours per day, Monday-Friday). Please note that we will not consider candidates planning to combine this job with another one. Remote work. You may be located in almost any country, just need a good Internet connection, a powerful computer to work from, and the opportunity to adjust your working schedule for the team (from 9 am to 5 pm New York time). Innovative environment. Work with business leaders building cutting-edge AI solutions in a high-growth market. Stability. This is not project work, we consider only the candidates looking for a long-term commitment of 2+ years. Salary will be discussed during the interview. Paid in USD. Application deadline: ASAP Hire5 provides aspiring talents worldwide with remote opportunities to enhance their careers in Silicon Valley startups and other US-based companies. Interested in joining one of the most promising US startups? Press here to apply now or click “connect” on career.hire5.co to subscribe for future opportunities in your desired profession!