Senior FullStack Engineer

GoodHabitz

Senior Full Stack Engineer at GoodHabitz building features for EdTech products. Collaborating across teams to enhance user learning experiences and improve development workflows.

Posted 5/7/2026full-timeMadrid • 🇪🇸 SpainSeniorWebsite

Tech Stack

Tools & technologies

JavaScriptNode.jsReactTypeScript

About the role

Key responsibilities & impact

- Build and maintain features across the full stack—APIs, data layers, and user interfaces
- Contribute to architecture and system design, weighing trade-offs and helping the team make thoughtful decisions
- Own your work end-to-end: from idea to implementation, testing, documentation, and deployment
- Improve and maintain CI/CD pipelines and deployment workflows
- Review code with a focus on quality, clarity, and knowledge sharing
- Communicate technical decisions in a clear and accessible way, helping the team stay aligned—even when opinions differ

Requirements

What you’ll need

- 5+ years of experience as a full stack engineer, working across both backend and frontend
- Strong experience building real products and collaborating with Product, Design, and UX teams
- A product mindset—you understand what creates value for users and the business
- Solid experience with Node.js, TypeScript, and React
- Hands-on experience with CI/CD pipelines and deployment processes
- Familiarity with system design concepts like service boundaries, data modeling, and scalability
- Experience using LLM tools (such as Claude Code, Copilot, or Cursor) in your daily workflow—not just for coding, but also for research, documentation, and ideation
- A pragmatic approach: you balance strong opinions with collaboration and know when “good” beats “perfect”

Benefits

Comp & perks

- 💰 Competitive salary that matches your impact
- 🏖️ 25 days of paid holiday to recharge
- 💻 Flexible working setup with the tools you need to do your best work
- 📈 Unlimited access to GoodHabitz learning resources for your personal and professional growth
- 🌍 An international, diverse team where different perspectives are celebrated
- 🎉 Fun team events, outings, and creative sessions you’ll actually want to attend
- 🤝 A culture built on trust, ownership, and continuous improvement

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

full stack engineeringNode.jsTypeScriptReactCI/CD pipelinesdeployment processessystem designdata modelingscalabilityLLM tools

Soft Skills

communicationcollaborationproduct mindsetpragmatic approachquality focusknowledge sharingdecision makingalignmentclaritythoughtful decision making