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# Senior Backend Engineer (NYC)

- **Company:** DualEntry
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Salary:** $100,000.0 - $120,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Business Logic, Databases, Continuous Integration, Django Web Framework, Python (Programming Language), PostgreSQL, SQL Databases, Systems Integration, Web Application Frameworks, Lightspeed, Flask (Web Framework), Backend, Fastapi, Cassandra, Search Engines, Webhooks
- **Published:** October 17, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-backend-engineer-nyc-new-york-ny--2907f6ca-f77d-4ff5-aa01-73ac5f85a459

## About the Role

* 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)

## Description

About DualEntryDualEntry is building the OS for finance.Every business needs a financial system of record, yet the world's largest fintech market ($220B+) still runs on software from the 1990s. DualEntry's AI-native ERP automates accounting from data entry to close, so finance teams move faster, spend less and incur less risk.In just 2 years we've raised $100M+ from Lightspeed, Khosla Ventures, Contrary and Google Ventures and earned the trust of customers from $5M ARR to publicly traded companies.We hire outliers - people who have achieved difficult things, in their careers or beyond. You'll find leaders, colleagues who've competed at the highest levels of sport, performed on Broadway, trained with UFC champions and founded the country's largest Python community.Where You'll Create ImpactBuild!Design backend systems and APIs (Python preferred) that run real-time, business-critical accounting logicShip features end to end - architecture, CI/CD, testing, monitoring, and beyondIntegrate third-party tools and external systems, proactively managing edge cases and riskWhat Sets You Up for SuccessHardcore work ethic and high agency5+ years in backend engineering (language agnostic)Deep experience with complex business logic productsStrong database skills: PostgreSQL, SQL, ORMs, migrations, schema designExperience deploying on AWS (or similar), with solid CI/CD and production-readiness fundamentalsBonus: Python and a modern web framework (FastAPI, Flask, or Django)Why You'll Thrive HereSignificant equity ownership in one of the top AI companies in the worldYou're joining early and will grow with DualEntryYour feedback shapes the product directlyHigh-speed, high-trust environment with high expectationsMeet the Engineering TeamIgnacio 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 OperatePragmatic: 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 breaksHard 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 problemsFast-moving: you deploy daily, iterate quickly, and never wait for permissionBenefits & CompensationEquity: $100,000 - $120,000Base salary: $200,000 - $350,000Medical, dental & vision insuranceOne Medical membershipMental health support (Talkspace)Fertility & family-building support (Kindbody)Virtual healthcare (Teladoc Health)401(k) benefitsCommuter benefitsLearning & development budget for courses, certifications & language learningUnlimited AI tokensAI skills development & enablementVisa & permanent residence sponsorshipFlexible PTO (27 days, including public holidays)Collaborative, in-office culture with no bureaucracySnacks, 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, Head of Engineering at DualEntry