Senior Software Engineer - Tax & Accounting

Sydecar is on a mission to transform the world of private markets. Our goal is to make these markets more accessible, transparent, and liquid, and we're achieving this by revolutionizing the way investment vehicles are created and executed.

At Sydecar, we're not just a platform; we're a trusted partner in venture capital. We're dedicated to simplifying and standardizing the private investing experience, empowering capital allocators to discover and support visionary entrepreneurs who are shaping the future.

Our platform is designed with ease and efficiency in mind. We take care of all the behind-the-scenes tasks, from automating banking, ensuring compliance, handling contracts, managing taxes, to streamlining reporting. This leaves investors the freedom to concentrate on what matters most: making valuable deals and nurturing meaningful relationships.

Join us at Sydecar, as we lead the charge in revolutionizing private investing.

Locations: New York City, San Francisco, Seattle (Hybrid – choose any 2 days each week to work from the office)

Join Sydecar's Platform team and take ownership of some of the most complex and high-impact problems in financial technology. We're building sophisticated software that automates complex tax calculations, compliance workflows, and accounting processes—replacing manual work with intelligent systems that scale across multiple jurisdictions and investment structures.

As a Senior Software Engineer - Tax & Accounting, you'll have the opportunity to model complex financial workflows, build scalable tax and accounting infrastructure, and ship end-to-end features that make compliance accessible to non-technical users.

This role sits within the Platform/Internal Tooling Team, which focuses on building systems that enable our Finance, Operations, and Customer Experience teams to work faster, smarter, and more efficiently.

• Frontend: TypeScript and React in a Mono-Repo structure

• Backend: TypeScript, using NestJS and Prisma

• Database: PostgreSQL

• Model complex tax and accounting workflows from real-world fund data

• Build scalable infrastructure such as tax engines, GL automations, and transaction pipelines

• Ensure data integrity and audit-readiness across jurisdictions and fund structures

• Ship end-to-end features — from backend data pipelines to frontend tools that make tax and accounting workflows accessible to fund managers and investors

• Partner with product, QA, and technical support to deliver robust, user-facing tools

• Work closely with internal tax/accounting experts as we move from manual processes to automated systems, you'll help clean up legacy data models, streamline integrations, and increase system reliability

• Lead and mentor junior engineers in the design, development, and testing of software applications

• Participate in code reviews and provide constructive feedback to ensure adherence to coding standards and best practices

• Design and build multi-part solutions to story tasks, taking into account risk mitigation and advanced testing processes, including building tests using React Testing Library and Playwright

• At least 5 years of software engineering experience, ideally working on a similar tech stack to Sydecar

• Experience with TypeScript and React required

• A strong background in building back-end systems

• Understanding of financial workflows, or eagerness to dive deep into tax calculations, fund accounting, and compliance systems — you’re curious about financial systems and motivated to understand how investment structures and tax logic intersect with software

• Thrive in complexity — modeling ambiguous problems, messy data, and evolving regulatory requirements in a relational database (PostgreSQL) where every record is critical

• Build for reliability — designing systems to produce audit-ready financial and tax outputs, not best-effort calculations

• Experience writing unit and E2E tests

• Strong communication and leadership skills, with the ability to foster collaboration across teams and support the growth of junior engineers

• Great analytical and problem solving skills, with a knack for debugging tricky issues and coming up with creative solutions

• Execution-focused, comfortable with balancing tradeoffs and making progress in a fast-moving environment

• A Bachelor's degree in Computer Science, Software Engineering, or a related field

• Experience with Agile development methodologies and version control systems such as Git

• Knowledge of cloud-based technologies such as GCP

• Familiarity with DevOps practices and tools such as Jenkins or Docker

• Prior experience working in Fintech

• Experience with tax software, accounting systems, or compliance platforms

• Knowledge of fund structures, tax regulations, or financial reporting requirements

We're building a diverse team whose skills balance and complement one another. If you don't tick every box above, we'd still encourage you to apply. We have more great opportunities on other Engineering teams, so please just apply to one open role. The team will consider you for all open roles that could be a fit!

Our total compensation package includes three components: a competitive base salary, a generous annual bonus plan of up to 10%, plus equity giving you a real ownership stake in a fast-growing company.

Our Total Cash Compensation (Base+Bonus) range for this role is: $187,000 - $231,000.

The Total Cash Compensation range listed for this position is an estimate based on market data and internal benchmarking and does not guarantee a specific salary at the time of hire. Actual compensation may vary depending on experience, qualifications, performance and other factors.

Our values are important to the way we live and work at Sydecar. They guide our priorities, behaviors and interactions.

Be Committed

As a team, we rise to meet challenges and recognize that we become stronger and develop character when facing adversity.

Be Excellent

We measure our success not just by what we achieve, but by how we achieve it—through integrity, creativity, elegance, and a commitment to continuous improvement. Excellence is not just doing things well—it's looking for ways to do them better.

Be Humble

Humility is our key to personal and professional growth. We appreciate that great ideas can come from anywhere, regardless of seniority, pedigree, or experience. We care more about collective outcomes than who gets credit or who does what. We try to not let our ego cloud our judgment.

Win Together

Winning is no accident. It is the result of collective hard work, perseverance, sacrifice, and most of all, loving what we do. Winning requires that we give extra—sometimes winning calls for late nights or extra effort, and we show up for clients and each other with urgency and heart. While excellence is a journey, winning is a destination.

Sydecar is committed to the principle of equal employment opportunity for all employees and to providing employees with a work environment free of discrimination and harassment. All employment decisions at Sydecar are based on business needs, job requirements and individual qualifications, without regard to race, color, religion or belief, national, social or ethnic origin, sex (including pregnancy), age, physical, mental or sensory disability, HIV Status, sexual orientation, gender identity and/or expression, marital, civil union or domestic partnership status, past or present military service, family medical history or genetic information, family or parental status, or any other status protected by the laws or regulations in the locations where we operate. Sydecar will not tolerate discrimination or harassment based on any of these characteristics. Sydecar encourages applicants of all ages.