Senior AI-Native Software Engineer – Full Stack (React, Next.js, Node.js)

About the Position

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.

Responsibilities

• Working in clients' teams as an 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

Requirements

• 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)

Nice to 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 Offer

• Competitive salary: 140-180 PLN/h net + VAT / B2B
• Opportunity to work in a dynamic and innovative environment
• Collaborative and inclusive team culture
• Professional development opportunities

About the Company

TheGoodCode (the.good.code) is a 25-person software house operating across three countries. It builds modern business applications through long-term client partnerships, with a business-first approach that emphasizes understanding problems before designing software. The company uses AI as a disciplined engineering tool-not a shortcut-to improve software design and delivery, while maintaining a focus on scalable, production-ready quality. Its culture values ownership, autonomy, clear communication, collaboration, curiosity, continuous growth, early feedback, and measurable business impact. Distinguishing qualities include close integration with client teams, AI-assisted engineering practices, and contributions to open-source and technical communities.