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Haystack

Junior Software Engineer

Europe (non-EU)

July 7, 2026 at 10:39 AM

✨ AI summary

Location

  • United Kingdom (Remote)

Languages

  • JavaScript
  • TypeScript

Frameworks

  • React.js
  • Tailwind CSS
  • Node.js (Express)

Cloud Services

  • AWS

Databases

  • MongoDB

Experience Level

  • Early‑career / Graduate

Combine your passion for software engineering with a drive to tackle sustainability and climate change.


This forward-thinking organisation is looking for an early-career full-stack developer to help deliver digital transformation projects with real environmental impact. You’ll work across the stack, gain mentorship from experienced engineers, and develop skills that go well beyond a typical graduate or junior role.


What you’ll do:

  • Build and maintain both front-end and back-end components for new digital solutions
  • Develop user interfaces using React.js, TypeScript and Tailwind CSS
  • Support back-end services with Node.js (Express)
  • Work with MongoDB for data storage and management
  • Contribute to AWS cloud infrastructure and deployment
  • Assist with containerisation using Docker/Kubernetes
  • Implement authentication systems (OAuth 2.0, Auth0, AWS Cognito)
  • Design and consume RESTful APIs and apply security best practices (e.g. OWASP)
  • Collaborate through Git-based version control, documentation and code reviews


What you bring:

  • Degree (2:1 or above) in Computer Science, Software Engineering or related field – or equivalent practical experience
  • Some hands-on exposure to JavaScript/TypeScript and frameworks like React.js
  • Basic back-end development experience with Node.js
  • Understanding of databases, especially MongoDB
  • Interest or some exposure to AWS cloud services and containerisation
  • A genuine passion for sustainability, ESG and climate solutions
  • A collaborative, problem-solving mindset and eagerness to learn


Why this role stands out:

  • Mentorship and guidance from experienced developers
  • Early responsibility on meaningful projects with global relevance
  • A clear path to grow into more senior engineering roles


If you’re ready to launch your software career while helping address the climate challenge, this is your chance to make a tangible difference.