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# Senior Software Engineer - Platform & AI for Tax Tech

- **Company:** ONSHORE PARTNERS LLC
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Amazon Web Services, Cloud Computing, Code Review, Relational Databases, Information Extraction, TypeScript, Large Language Models, Data Lineage
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25197_9cc064c675cdc29ebd9ced7985bf7834-2156798310

## About the Role

* 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., * 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.