Senior Software Engineer

Thyme; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

Thyme is seeking a Software Engineer to join their team in Central London. This role will focus on building scalable platforms for financial subscriptions and automate grid interactions. The ideal candidate will have over 6 years of experience, proficient in TypeScript, React, and Node.js, and be ownership-driven. As part of a collaborative engineering team, you will impact the transition to Net Zero in the UK. The position offers a hybrid work model and opportunities to contribute significantly to the company's mission.

Qualifications

• 6+ years of professional experience in a product-led engineering environment.
• Comfortable with frontend (React/TypeScript) and backend (Node/Postgres) technologies.
• Proficiency in writing maintainable, secure code.

Responsibilities

• Drive features from conception to delivery across the full development lifecycle.
• Contribute to high-level decisions on tooling, infrastructure, and system performance.
• Participate in deep code reviews and mentor peers.

Skills

TypeScript

React

Node.js

Docker

AWS

GraphQL

REST APIs

Job description

Location: Central London - Hybrid or (entertaining candidates outside of London, doing once a month onsite collaborative visits)

Sponsorship: Not available (must have full UK Right to Work)

The Opportunity

Join a mission‑driven, Series A scale‑up following a record‑breaking funding round. They are scaling their engineering team to deliver a subscription model for energy systems.

You will join a high‑calibre, lean engineering squad working directly with the Head of Engineering and Product leadership. This is a role for an engineer who wants to build products that have a tangible, positive impact on both consumer wallets and the planet.

The Role

As a Software Engineer, you will be instrumental in building out a scalable platform that manages complex financial subscriptions, real‑time monitoring, and automated grid interactions.

• Build & Own: Drive features from conception to delivery across the full development lifecycle.
• Architectural Input: Contribute to high‑level decisions on tooling, infrastructure, and system performance.
• Collaborative Growth: Participate in deep code reviews and mentor peers to maintain a high bar for code quality.
• Agile Environment: Work in a fast‑paced, product‑focused team utilising modern CI/CD, GitHub Actions, and AWS.

Technical Environment

They look for engineers who are "tech‑agnostic" but highly proficient in our core stack:

• Language/Frameworks: TypeScript, React, Node.js, Docker, AWS (RDS, Lambda, SNS), GraphQL, REST APIs

Who You Are

• Experienced: 6+ years of professional experience in a product‑led engineering environment (Start‑up or Scale‑up experience is a major plus).
• Full‑Stack Mindset: Comfortable navigating the backend (Node/Postgres) and frontend (React/TypeScript).
• Ownership‑Driven: You don’t just write tickets; you solve business problems and take pride in maintainable, secure code.
• Proactive: You are curious, open to learning new technologies, and comfortable navigating the ambiguity of a rapidly growing firm.

Why Join?

• Stability & Growth
• Impact: Help homeowners save while accelerating the UK's transition to Net Zero.
• Culture: A collaborative London‑based team that values high‑calibre engineering and a connected, social office environment.