Senior Software Engineer

Role

A Senior Software Engineer will build and operate full-stack software for an AI-native platform modernizing procurement and distribution across defense, aerospace, and industrial supply chains.

They will own customer-facing features end to end, from understanding the operational problem through implementation, testing, deployment, and follow-up in production.

The role starts in Warsaw with an expected relocation to the United States within approximately six months. The company provides E-2/O-1 visa sponsorship and covers relocation costs.

Responsibilities

• Design, implement, test, deploy, and operate full-stack product features.

• Build frontend experiences with TypeScript, JavaScript, React, Next.js, or Svelte.

• Develop backend services and APIs with Node.js or Python.

• Design PostgreSQL schemas, write production SQL, and improve query performance.

• Build integrations and data-ingestion workflows for fragmented operational systems, documents, APIs, and business data.

• Translate customer and operational requirements into maintainable technical solutions.

• Own delivered features through production, including monitoring, debugging, incident resolution, and iteration.

• Communicate technical proposals, delivery estimates, risks, and trade-offs clearly to founders, deployment strategists, and engineers.

• Maintain high standards for code quality, testing, security, reliability, and long-term maintainability.

• Use AI coding tools to improve development speed while validating generated code through review, tests, and production safeguards.

• Contribute to a fast-moving product environment where engineers work with incomplete requirements and take responsibility for outcomes.

• Relocate from Warsaw to the United States within approximately six months of starting.

Required experience

• Professional experience building production software as a full-stack engineer.

• Hands-on TypeScript or JavaScript experience.

• Hands-on React, Next.js, or Svelte experience.

• Hands-on backend development with Node.js or Python.

• Production experience with PostgreSQL and SQL.

• Evidence of owning features or systems from initial implementation through production operation.

• Experience designing or implementing APIs, integrations, or data-ingestion workflows.

• Ability to communicate technical decisions, delivery commitments, risks, and trade-offs clearly.

• Evidence of independently building software outside narrowly defined ticket work, such as a shipped side project, open-source contribution, hackathon project, or zero-to-one product.

• Confirmed willingness to relocate to the United States within approximately six months.

Technical environment

• TypeScript and JavaScript.

• React, Next.js, and Svelte.

• Node.js and Python.

• PostgreSQL and SQL.

• Full-stack SaaS applications.

• APIs, integrations, and data-ingestion pipelines.

• AI coding tools.

• Production systems supporting complex procurement and distribution workflows.

Success measures

• Customer-useful features are shipped reliably from concept through production.

• Implementations remain maintainable, tested, observable, and aligned with the product’s operational requirements.

• Frontend, backend, database, and integration work is delivered as a coherent end-to-end system.

• Production issues are diagnosed and resolved with appropriate urgency and technical rigor.

• Technical decisions reduce manual operational work and improve the speed, accuracy, or reliability of customer workflows.

• AI coding tools increase engineering effectiveness without lowering standards for correctness, security, or maintainability.

• The engineer completes the planned relocation to the United States within the expected timeframe.