Staff Software Engineer

Onshore • New York, NY

9d • Onsite

About The Position

Onshore is seeking a Staff Software Engineer to define and drive technical strategy for one of its three pillars. This role involves owning end-to-end technical solutions for critical systems, making build-versus-buy decisions, and producing technical roadmaps. Staff engineers at Onshore operate within a technical leadership model, influencing through architecture, code, and technical direction rather than direct reports. The first Staff engineers at the company set the direction for future engineering hires. This role requires a high degree of ownership, comfort with ambiguity, and the ability to define problems and plans independently. The position is based in the New York City office.

Requirements

• 8+ years of software engineering experience, with demonstrated impact at staff or equivalent scope (leading initiatives across multiple teams or systems).
• Proven track record designing and shipping systems that are both highly available and correct, especially in domains where incorrect output has significant consequences.
• Deep architectural judgment paired with fast execution; ability to prototype to think and translate strategy into code.
• Ability to influence technical direction and align teams without direct authority.
• Excellent written and verbal communication skills across engineering and leadership.
• High ownership: comfortable with ambiguity, able to define the problem and the plan.
• Ability to work in person at our New York City office.

Nice To Haves

• Experience making LLM-powered systems production-reliable (agents, evaluation infrastructure, structured extraction at scale).
• Experience owning platforms that other teams build upon, with judgment about primitives versus one-offs.
• Compliance-aware system design experience (audit trails, data lineage, financial controls, or regulated-domain experience).
• Experience with correctness-critical computation (ledgers, billing, rules engines, or compiler-like systems).
• Track record of raising senior engineers through technical direction.
• Experience contributing meaningfully to hiring and engineering culture.

Responsibilities

• Define and drive the technical strategy for one of Onshore's three pillars, including multi-year architecture decisions across agent infrastructure, tax computation, and data pipelines.
• Own end-to-end technical solutions for systems where correctness is paramount, such as durable agent workflows, versioned tax computation, evaluation infrastructure, and filing pipelines.
• Identify and lead infrastructure investments to enable new capabilities, including new study types, expanded entity and state coverage, and increased leverage for operators.
• Make principled build-versus-buy decisions and produce technical roadmaps that balance near-term delivery with long-term platform health.
• Advise founders and engineering leadership on technical trade-offs and their business implications.
• Multiply the team's effectiveness through the creation of primitives, designs, and code reviews that elevate the work of other engineers.

Benefits

• Health coverage
• Dental coverage
• Vision coverage
• Unlimited PTO
• Total equity grant valued at $100,000 (ISOs valued at Series B preferred price, standard four-year vest with one-year cliff and early exercise available)

What This Job Offers

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