Backend Software Engineer Jobs

Backend Software Engineer

DualEntry

Location:
Poland, Warsaw

Category:
IT - Software Development

Contract Type:
B2B

Salary:

65000.00 - 135000.00 USD / Year

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Job Description:

As our Backend Engineer, you’ll build and own critical features end-to-end, increasing product velocity and powering DualEntry’s AI-native ERP. This is an intense, hands-on role with full ownership. You’ll be joining at an early and defining moment. Your work will directly shape our product, customers, and trajectory.

Job Responsibility:

Design and build core backend systems using Python
Build APIs, services, and infrastructure handling real-time, business-critical accounting logic
Launch production-ready features from scratch, including CI/CD and deployment
Turn complex finance workflows into performant, secure systems
Manage complexity in a business-logic-heavy product, including migrations and scale
Integrate third-party tools and external systems while proactively managing risk
Own work from architecture to testing, monitoring, and post-release care
Collaborate closely with founders, product, and frontend to co-design systems and ship seamlessly
Ship fast, make architectural calls, and deploy to prod daily

Requirements:

5+ years of backend engineering experience
Deep experience with complex business-logic products
Proficient in Python and modern frameworks (FastAPI, Flask, Django)
Strong AWS (or similar cloud) experience
Excellent database skills: PostgreSQL, SQL, ORMs, migrations, schema design
Experience building and testing robust APIs
Solid understanding of CI/CD and production-readiness
Ability to manage complex systems with evolving requirements
Fluent in English (C1+) with strong communication skills
Pragmatic, curious, fast-moving, and highly focused on execution

What we offer:

Significant equity ownership
Time Off: 15 PTO days + 12 public holidays
Early-stage role with high autonomy and real long-term upside
Remote-first team

Additional Information:

Job Posted:
December 08, 2025

Work Type:

Remote work

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