Product Engineer

Plinth; Greater London; On-site; GBP 80,000 - 92,000; Full time

Job summary

A charity-focused tech company in Greater London is seeking a talented developer to create impactful software solutions for charities. This role emphasizes coding proficiency in React and Next.js, along with a passion for solving real-world issues faced by charitable organizations. You'll work closely with users directly in the field, enhancing the efficiency of charity operations. Join us at an innovative company that embraces rapid prototyping and values your full ownership of the development process.

Benefits

Direct customer access

Tool budget for work efficiencies

Expertise in charity sector

Qualifications

• Obsession with a field, demonstrating deep commitment and mastery.
• Proven technical skill to build React/Next.js features independently.
• Familiarity with AI tools that enhance coding efficiency.

Responsibilities

• Discover issues faced by charity workers and provide solutions through code.
• Iterate rapidly on prototypes based on user feedback.
• Take full ownership of features from conception to deployment.

Skills

React

Next.js

AI tools proficiency

Coding mastery

Job description

Apply here -Plinth Solve our Puzzle. Earn £80k*

The Mission

Your job is to discover what makes working at a charity frustrating, inefficient, or soul-crushing—and fix it. Everything else is in service of that goal.

What You'll Actually Do

Go directly to users. You'll visit charities and councils in Belfast, Durham, Minneapolis, Warrington, and Slough. Meet people where they work, understand what makes them angry or frustrated, then write code to solve it.

Ship fast, iterate faster. Build rapid prototypes, get real feedback, then craft properly delightful implementations. It's 2026—you'll leverage AI tools to ship an absurd amount of high-quality work.

Own your work end-to-end. You'll build complete features in React/Next.js from conception through deployment, with full responsibility for what you ship.

What You Won't Do

• Workshop ideas and write specs in endless internal meetings

• Ask permission, wait for designs, or "align stakeholders"

• Estimate story points or maintain backlogs

You’ll Know It's Working When

• A customer texts you: "this is probably a stupid idea, but…"

• Someone literally cries when you show them what you've built

• A user sees you coding at their office over lunch and calls you a wizard

How We’ll Support You

• Direct customer access — no gatekeeping, no account managers filtering feedback

• Tool budget — we'll pay for whatever makes you faster

• Domain expertise — we'll get you up to speed on the charity sector so you can build with genuine understanding

What We’re Looking For

Obsession. You've stuck with something for years—code, history, speedrunning, doesn't matter. You know what it feels like to care deeply about mastery.

Excellence. There's one thing you're genuinely world‑class at (top 0.1%). You what it is.

Technical depth + AI fluency. You can build complete React/Next.js features without autocomplete, but you've used Claude or Cursor enough that it's fundamentally changed how you work—not just something you've tried once.

How We Actually Work

High trust, low ceremony. You won't spend 7 hours a day in meetings. We're building a small team of high performers and removing everything that slows them down.

Prototypes over paperwork. We value working code over design documents. If you have a feature idea and get our greenlight, we'll get it into customers' hands as fast as you can build it.

AI‑friendly. Use whatever tooling makes you faster. Hotspot Cursor on the train back from Warrington to solve a client issue? We back you 100%. It just needs to be good code.

Ownership matters. You'll have full responsibility for what you build. Years of FAANG experience doesn't impress us—shipping delightful products that solve real problems does.

About Plinth

We build grants management and CRM software for UK charities, community foundations, and local councils. We're growing fast (12% MoM) and expanding internationally.