Senior Backend Engineer — Remote, Equity & Ownership

Dualentry; Warszawa; Remote; PLN 363,000 - 600,000; Full time

Job summary

A rapidly growing AI startup is seeking a Senior/Staff Backend Engineer to design and build core systems with full ownership. This role is remote-first and offers significant equity ownership in a leading AI company. The ideal candidate has over 8 years of experience in backend engineering, deep expertise in Python, and a strong understanding of cloud infrastructure. High autonomy and a high-speed culture are key features of this position.

Benefits

Base Salary: $100K–$165K USD

Equity: ~$50K USD

15 PTO days + 12 public holidays

Visa sponsorship option for relocation

Qualifications

• 8+ years of experience in backend engineering.
• Proven track record in high-growth, high-ownership environments.
• Strong skills in PostgreSQL, SQL, ORMs, migrations, and schema design.

Responsibilities

• Own end-to-end execution for backend systems and infrastructure.
• Build APIs, services, and real-time systems handling complex accounting logic.
• Collaborate with teams to turn complex workflows into secure, performant systems.

Skills

Python

FastAPI

Flask

Django

PostgreSQL

SQL

API design and testing

AWS or comparable cloud infrastructure

CI/CD

Fluent English (C1+)

Job description

A rapidly growing AI startup is seeking a Senior/Staff Backend Engineer to design and build core systems with full ownership. This role is remote-first and offers significant equity ownership in a leading AI company. The ideal candidate has over 8 years of experience in backend engineering, deep expertise in Python, and a strong understanding of cloud infrastructure. High autonomy and a high-speed culture are key features of this position.