[Hiring] Principal/Senior Software Engineer @Poland and Middle-Eastern Europe

Role Description

You will be:

• Designing and developing production-grade full-stack web applications and enterprise software.
• Providing hands-on technical leadership and helping establish engineering patterns, standards, and best practices.
• Translating product requirements and emerging ideas into pragmatic, scalable technical solutions.
• Working across frontend and backend, with a strong focus on TypeScript, JavaScript, React, and Node.js or Deno.
• Designing and integrating REST APIs, webhooks, event-driven integrations, and third-party SaaS platforms.
• Contributing to technical decisions around authentication, authorisation, data access, security, performance, and reliability.
• Mentoring engineers, sharing knowledge, and helping raise engineering capability across the team.
• Collaborating with Product, Architecture, Platform Engineering, and other engineering teams.
• Experimenting with emerging technologies and turning successful prototypes into production-quality solutions.
• Supporting modern CI/CD, testing, observability, and production engineering practices.

Qualifications

• 10+ years of professional software engineering experience, ideally across modern full-stack web applications and enterprise products.
• Strong hands-on expertise in TypeScript and JavaScript, with significant production experience in React and backend runtimes such as Node.js or Deno.
• Solid experience with PostgreSQL, including data modelling, querying, performance, and application integration, as well as Supabase or comparable cloud-native / Backend-as-a-Service platforms, including authentication and data access controls such as RLS.
• Strong experience designing and integrating REST APIs, webhooks, event-driven solutions, and third-party SaaS platforms, including OAuth 2.0 and secure API integrations.
• Strong understanding of modern authentication, authorisation, permissions, and secure application design.
• Experience with modern frontend development patterns, automated testing across unit, integration, and end-to-end levels, and responsive application design.
• Strong understanding of CI/CD, Git-based workflows, and modern SDLC practices, with experience deploying and supporting production applications with a focus on observability, performance, reliability, security, and operational readiness.
• Excellent problem-solving and debugging skills, particularly across complex full-stack and third-party integration scenarios.
• Strong communication and collaboration skills, with the ability to work effectively across engineering, product, architecture, and platform teams.
• Automation-first and product-focused mindset, comfortable working with emerging technologies while maintaining the engineering discipline required to operate software at enterprise scale.
• Practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery.

Requirements

• Work from the European Union region and a work permit are required.

Nice to have

• Experience using LLM APIs, AI SDKs, or developing AI-enabled applications.
• Familiarity with the Vercel ecosystem, TanStack Query, React Router, Tailwind CSS, or shadcn/Radix.
• Experience working with developer platforms such as GitHub or Jira.
• Experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work.
• Interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches.

Recruitment Process

• CV review
• HR call
• Interview
• Client Interview
• Decision