Senior Backend Engineer (NYC)

Where You'll Create Impact

• Build!
• Design backend systems and APIs (Python preferred) that run real-time, business-critical accounting logic
• Ship features end to end - architecture, CI/CD, testing, monitoring, and beyond
• Integrate third-party tools and external systems, proactively managing edge cases and risk

What Sets You Up for Success

• Hardcore work ethic and high agency
• 5+ years in backend engineering (language agnostic)
• Deep experience with complex business logic products
• Strong database skills: PostgreSQL, SQL, ORMs, migrations, schema design
• Experience deploying on AWS (or similar), with solid CI/CD and production-readiness fundamentals
• Bonus: Python and a modern web framework (FastAPI, Flask, or Django)

Why You’ll Thrive Here

• Significant equity ownership in one of the top AI companies in the world
• You’re joining early and will grow with DualEntry
• Your feedback shapes the product directly
• High-speed, high-trust environment with high expectations

Meet the Engineering Team

• Ignacio shaped the baseline of our integration framework from scratch in a single weekend, then spent most weekends - while coordinating the team - shipping what was never on the roadmap: webhooks, a search engine for millions of transactions, and Puma itself. Pure initiative, compounding.
• Marcin took a non-existent tax structure and built it end to end, setting the north star for how the team keeps improving it on top of it; modular and robust, always setting the bar for the rest.
• Puhiza grew her team from one to full capacity, while owning our integration framework end to end; scaling it to support migrations, integrations, and bank connections. The queen of I/O on our platform.
• Danylo took ownership of our bank connection engine end to end and rebuilt it from scratch over a weekend.

How You Operate

• Pragmatic: you like to move forward and make decisions based in reality (not theory). We don't debate if Cassandra has the most theoretical scalability - we use Postgres until it breaks
• Hard working: 'You can work long, hard, or smart, but [here] you can't choose two out of three' - Jeff Bezos.
• Curious: you love to learn, are highly curious about new frameworks and solutions to engineering problems
• Fast-moving: you deploy daily, iterate quickly, and never wait for permission

Benefits & Compensation

• Equity: $100,000 - $120,000
• Base salary: $200,000 - $350,000
• Medical, dental & vision insurance
• One Medical membership
• Mental health support (Talkspace)
• Fertility & family-building support (Kindbody)
• Virtual healthcare (Teladoc Health)
• 401(k) benefits
• Commuter benefits
• Learning & development budget for courses, certifications & language learning
• Unlimited AI tokens
• AI skills development & enablement
• Visa & permanent residence sponsorship
• Flexible PTO (27 days, including public holidays)
• Collaborative, in-office culture with no bureaucracy
• Snacks, drinks, team events & more

• “Join us to fix the boring, think the hard, and build the impossible, so we become the most robust engineering platform for accounting the world has ever seen.”
• Ignacio Brasca, of Engineering at DualEntry