Senior Software Engineer

Onshore • New York, NY

11d • Onsite

About The Position

Onshore is seeking a Senior Software Engineer to join their team. This role involves owning a major product surface on one of three engineering teams: Platform & Agents, Agriculture, or Corporate Tax & Compliance. The position requires writing code for critical parts of the product, setting technical standards through code contributions, and potentially leading a small pod of engineers. The role emphasizes high ownership, technical decision-making, and a strong focus on correctness, as the company's output is reviewed by tax professionals and filed with the IRS. Onshore operates under a technical leadership model where all engineers ship code, with leadership opportunities scoped to complement individual contribution, not replace it.

Requirements

• 5+ years designing, shipping, and operating production software, including systems you owned end to end.
• Strong proficiency in a typed language. We work in TypeScript; deep experience elsewhere with real interest in switching counts.
• A track record of leading technical work: architecture that shipped, systems that lasted, engineers who got better because you were there.
• High ownership: comfortable with ambiguity, able to define the problem and the plan rather than execute a predefined spec.
• You care about correctness beyond what most product engineering demands. Our output is reviewed by tax professionals and filed with the IRS.
• Clear, precise communication on technical topics, in writing and in person.
• Able to work in person at our New York City office.

Nice To Haves

• Experience building or operating LLM-powered systems in production: agents, evaluation harnesses, structured extraction, or prompt and skill infrastructure.
• Experience building platforms or internal tools where other engineers were your customers, and judgment about when to build a primitive versus ship a one-off.
• Depth in AWS or comparable cloud infrastructure, especially workflow orchestration, queueing, and relational data at scale.
• Compliance-aware system design: audit trails, data lineage, tenant isolation, or work in regulated domains.
• A track record of mentoring engineers through code review and technical direction, and of aligning people without direct authority.

Responsibilities

• Own a major product surface on one of our three teams and write the code for the parts that can't be wrong
• Set the technical bar through your own PRs, not process documents
• Optionally lead a pod of one to three engineers: daily code review, weekly 1:1s, and growth accountability, capped so your IC output stays primary
• Make build-versus-buy and architecture calls that stick for years
• Own and raise the evaluation bar for your surface; the harness is shared, the standard is yours
• Work directly with the founders on roadmap; there is no PM layer between you and the business

Benefits

• health, dental, and vision coverage
• unlimited PTO
• total equity grant valued at $100,000
• ISOs valued at our Series B preferred price, on a standard four-year vest with a one-year cliff and early exercise available

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed