Full-Stack Engineer — AI-Driven Defense Logistics

TechTree; Warszawa; On-site; PLN 284,954 - 455,926; Full time

Benefits offered by this job

Equity: 0.05% - 0.3% real equity

Onsite in Warsaw; relocation to US to

Job summary

TechTree in Warsaw is seeking a Full Stack Engineer to join the core platform engineering team and contribute to the development, scalability, and reliability of mission-critical software supporting defence and supply chain operations.

You'll work closely with engineering leadership, founders, and customer-facing deployment teams to design, build, and maintain systems that integrate with complex legacy environments and support high-value, high-impact workflows.

Qualifications

• Shipping real projects end-to-end with production ownership.
• Strong SQL/PostgreSQL database design and reasoning.
• Commitment to software engineering standards and quality.
• Ability to thrive in fast-paced, high-accountability settings.

Responsibilities

• Full-stack platform development across frontend, backend, APIs, and databases.
• Integrations with legacy government and enterprise systems.
• Deliver customer-driven features that drive measurable outcomes.
• Uphold code quality through testing, docs, and reviews.
• Mentor and onboard new engineers as the team grows.

Skills

Experience in shipping projects

SQL databases (PostgreSQL)

Software engineering best practices

Fast-paced, high-accountability work

Willingness to relocate to the US

Job description

TechTree in Warsaw is seeking a Full Stack Engineer to join the core platform engineering team and contribute to the development, scalability, and reliability of mission-critical software supporting defence and supply chain operations.

You'll work closely with engineering leadership, founders, and customer-facing deployment teams to design, build, and maintain systems that integrate with complex legacy environments and support high-value, high-impact workflows.