Senior Shopify Engineer

🏢 Summary: B2B role for a senior full-stack engineer building scalable client business applications with React, Next.js, TypeScript, Node.js, and PostgreSQL. The role combines architecture, frontend and backend delivery, automated quality practices, and daily AI-assisted engineering with Claude/Codex. It offers 140–180 PLN/h net + VAT and work across multiple client projects. 🗂️ Requirements: 5+ years of commercial web-application development experience, JavaScript, TypeScript, React, Next.js and Node.js experience, Reusable AI workflows, prompts, skills or agentic solutions experience, MCP, tool-integration or multi-agent workflow knowledge, Software architecture and scalable system-design knowledge, Ability to translate business requirements into scalable technical solutions, Ability to review and validate AI-generated code, Independent work, priority management and context switching, Advanced English communication skills 📃 Skills: JavaScript, TypeScript, React, Next.js, Node.js, PostgreSQL, Playwright, Claude, Codex, MCP 🏢 Description: We’re a software house with a team of 25 professionals distributed across three countries. We focus on long-term projects and believe great software comes from ownership, strong collaboration with clients, and developers who care about the quality and business impact of their work. At the.good.code; successful software starts with understanding the business problem first. We work closely with our clients, use AI as an engineering tool rather than a shortcut, and improve the way software is designed and delivered. We focus on long-term collaboration and are looking for people who are curious, open-minded, and motivated to grow together with the business and the products we build. Interested to hear about the projects? You'll join a team building modern business applications powered by AI-assisted engineering. Your work will combine product thinking, software architecture, and collaboration with clients. Rather than focusing only on writing code, you'll use AI tools to design solutions, prepare specifications, review generated code, and help deliver scalable, production-ready software. You'll work across multiple client projects simultaneously, so being comfortable with context switching and managing priorities is an important part of this role. Tech stack: TypeScript, JavaScript, React, Next.js, Node.js, PostgreSQL, Playwright, AI: Claude, Codex, MCP, agentic workflows & reusable AI skills Salary: 140-180 PLN/h net + VAT / B2B Curious about your responsibilities? You will be: working in clients' teams as the equal team member building and developing frontend and backend features using React, Next.js, TypeScript, and Node.js designing application architecture, reusable modules and integration patterns translating business requirements into clear technical specifications for AI coding agents using AI coding agents (Claude/Codex) as part of your daily engineering workflow reviewing, validating, and improving AI-generated code building and improving AI-assisted engineering workflows, including reusable skills, prompts and testing practices contributing to software quality through automated testing, code reviews, and AI-assisted validation taking ownership of technical solutions within your area of responsibility contributing to open source libraries sharing knowledge and helping grow AI engineering practices within the the.good.code; community Ready to apply? First, check if you have: 5+ years of commercial experience building web applications experience with JavaScript, TypeScript, React, Next.js, and backend development using Node.js experience building reusable AI workflows, prompts, skills, or agentic solutions understanding of concepts such as MCP (Model Context Protocol), tool integrations, or multi-agent workflows the ability to translate business requirements into scalable technical solutions understanding of software architecture and scalable system design ability to review and validate AI-generated code rather than relying on it blindly product mindset - you understand the business context behind the features you build and actively look for better solutions ability to work independently, manage priorities, and switch context when needed critical thinking, ownership, and proactive attitude advanced English communication skills (you'll use English every day within the team and directly with international clients) We appreciate, if you have: experience building AI-powered developer tools or internal engineering platforms familiarity with Playwright or other automated testing frameworks contributions to open-source projects or active participation in technical communities willingness to travel occasionally for client workshops We value engineers who : take ownership of their work and deliver what they commit to work independently and manage their time without micromanagement care about quality instead of rushing delivery think about value and impact, not only implementation communicate clearly and work well in a remote environment raise issues early and treat feedback as part of growth enjoy collaboration and maintain a positive team attitude Keen to hear about our recruitment process? Here you go: The application form - fill it out. We really read it! 60-minute HR interview to learn about your experience and motivation 90-minute tech interview with our developers to check your practical skills 45-minute final interview with one of our Founders References check Welcome on board!