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.