Senior Fullstack Engineer - Climate NGO - Volunteer

We’re looking for an experienced engineer to act as a technical steward for the Bank.Green website, our primary public-facing platform, working alongside another senior engineer already on the project. Technical decisions are made in a collaborative, consensus-driven way, vs. than top-down. What difference will you make? The platform serves roughly 5,000 pages, the majority of which are repeatable, programmatically generated bank profile pages built from shared templates and structured data. As a result, performance, caching, SEO, and build efficiency are key concerns. This is a hands-on but flexible role, suited to someone who enjoys maintaining and improving real-world infrastructure that thousands of people rely on. What are we looking for? What we’re looking for

• Required A portfolio, GitHub profile, or equivalent code samples demonstrating real-world frontend or full-stack work
• Experience as a frontend or full-stack engineer at a mid-to-senior level
• Strong JavaScript fundamentals
• Experience with React and modern frontend tooling
• Familiarity with Astro, or strong interest in content-first frameworks (Next.js, Nuxt, Gatsby, etc.)
• Comfort reviewing code and guiding less experienced developers
• Experience working asynchronously with distributed teams
• Familiarity with Git-based workflows and Agile-style tools
• Genuine interest in climate action and environmental accountability

What will you be doing? The site is transitioning to Astro, with a React-based frontend, and is deployed via Cloudflare. Content is managed via Prismic as a headless CMS, with data coming from internal GraphQL and REST APIs. The platform serves roughly 5,000 pages, the majority of which are repeatable, programmatically generated bank profile pages built from shared templates and structured data. As a result, performance, caching, SEO, and build efficiency are key concerns. What you’d be working on

• Maintaining and improving a large Astro-based, React-driven site
• Improving build performance, caching strategy, and CDN efficiency
• Ensuring reliability, SEO, and performance across thousands of data-driven pages
• Reviewing and contributing PRs with an eye for clarity, quality, and maintainability
• Collaborating with another senior engineer on architecture, new features, and technical direction
• Helping shape sensible frontend and deployment practices over time

Ways we work

• Fully remote and asynchronous
• Communication via Slack, Linear, and occasional calls (MS365)
• Pragmatic, low-process, mission-driven team
• Strong bias toward maintainable code and real-world impact

Commitment This is an unpaid, volunteer role.

• Roughly 5–10 hours per week, flexible
• We’re looking for a longer-term engagement (around 6 months or more) to provide continuity and stewardship, though open to shorter-term applicants.