Senior Software Engineer

Propel; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Propel is seeking a Senior Software Engineer to own features and systems from discovery through to production and ongoing iteration in a fast-growing startup environment.

You will contribute to a pragmatic, collaborative culture, raise the quality bar through example, and bring a genuine ownership mindset to the work. Expect to mentor others and move quickly in a product-focused team that values rapid, iterative delivery.

Qualifications

• Senior level experience as a software engineer with hands-on coding across the stack.
• Proven ability to ship and maintain production software in a fast-moving product environment.
• Demonstrated pragmatism in engineering decisions and refactoring judgments.
• Strong engineering fundamentals applied to complex, evolving production codebases.
• Ownership mindset and translating business requirements into clean technical solutions.

Responsibilities

• Own features and systems from discovery through to production and ongoing iteration.
• Take real ownership from day one in a fast-moving startup environment.
• Collaborate across product and engineering teams to raise the quality bar by example.

Skills

Senior software engineer

Ownership mindset

Production software

Mentoring

Strong communication

Collaborative culture

Discovery to production

Rapid iterative delivery

Tools

Node.js

Python/Django

AWS

GCP

Azure

Job description

Senior Software Engineer within a fast-growing startup environment. We are looking for someone to own features and systems from discovery through to production and ongoing iteration. The team works in short, high-accountability sprint cycles and expects engineers to take real ownership from day one.

The engineering culture is pragmatic and collaborative. Strong engineers here progress quickly, take on meaningful responsibility early, and have a direct impact on the products they build. The client is looking for someone who raises the quality bar through example rather than ceremony and who brings a genuine ownership mindset to the work.

What You Will Bring

• Senior level experience as a software engineer with strong hands-on coding ability across the stack
• Proven ability to ship and maintain production software in a fast-moving product environment
• Demonstrated pragmatism in engineering decisions, knowing when to refactor, when to ship, and when to leave well alone
• Strong engineering fundamentals applied to complex, evolving production codebases
• A clear ownership mindset and the ability to translate business requirements into clean, proportionate technical solutions without over-engineering
• Successful experience mentoring or supporting the development of other engineers
• Strong communication skills and a collaborative approach to working across product and engineering teams
• The ability to pick up new concepts, technologies, and domain knowledge quickly when required
• Comfort jumping into live codebases and adapting to existing product culture and engineering standards
• Energy for rapid iterative delivery cycles rather than resistance to them

Bonus Points

• Experience with modern backend frameworks (e.g. Node.js, Python/Django, or similar)
• Hands-on experience with cloud infrastructure (AWS, GCP, or Azure)
• A background in product-focused engineering environments
• Experience working in a startup or scale-up environment

The Company

Our client is a product-led technology business operating in a high growth, fast-paced sector. The team is growing at real pace and this is the kind of environment where strong engineers progress quickly, take on meaningful responsibility early, and contribute directly to work that matters.

Compensation

Next Steps