Full Stack Python Developer

London / Hybrid | Permanent

A global financial markets business is hiring a Full Stack Python Developer to join a high-impact enterprise engineering team working on one of its most strategic platform initiatives.

This role sits within a central technology function responsible for building shared capabilities used across multiple trading and business areas. You’ll be helping shape the next generation of internal platforms, developer tooling, APIs, data services and AI-enabled products that support growth across the wider organisation.

This is an excellent opportunity for an engineer who enjoys solving complex technical problems, working across teams and building scalable systems in a fast-moving environment.

The Opportunity

You’ll join a modern engineering team focused on creating reusable enterprise technology that reduces duplication, accelerates delivery and improves standards across the business.

The platform under development is central to the company’s long-term technology strategy and will power a wide range of future digital services.

You’ll work across backend engineering, cloud infrastructure, integrations and internal tooling, while also contributing to emerging AI initiatives and developer productivity capabilities.

What You’ll Be Doing

• Design, build and maintain production-grade Python services and APIs
• Develop shared platform capabilities including APIs, connectivity layers and real-time services
• Build internal tools and development environments for engineering teams
• Contribute to AI-driven tooling and automation across the engineering estate
• Work closely with product owners, architects and engineers to deliver robust solutions
• Help define architecture standards, best practice and reusable patterns
• Build secure, scalable and resilient systems used across multiple business units
• Improve CI/CD pipelines, testing frameworks and DevOps processes
• Support production systems and troubleshoot issues where required
• Produce clear technical documentation and maintain long-term platform quality
• Contribute to a collaborative, high-performing engineering culture

What They’re Looking For

• Strong Python backend development experience in production environments (at least2 years)
• Experience building APIs using frameworks such as FastAPI, Flask or Django
• Good knowledge of at least one Python-compatible frontend framework
• Strong experience with AWS services and cloud-native development
• Understanding of event-driven systems (Kafka highly desirable)
• Strong grasp of software engineering principles and clean architecture
• Experience with CI/CD, automated testing and DevOps practices
• Comfortable working across teams to solve business problems with technology
• Experience in Agile delivery environments

Desirable Experience

• Node.js or C# exposure
• Terraform / Infrastructure as Code
• Distributed systems or API gateway experience
• Monitoring / observability tooling
• Enterprise platform or shared services experience
• Financial markets / capital markets background
• Experience with front-office tooling or trading environments

Package

• Competitive base salary
• Bonus potential
• Hybrid working model
• Strong benefits package
• High visibility strategic platform work
• Long-term progression opportunities within a global business

Find Out More

For a confidential discussion and full details on the team, roadmap and package, get in touch with Ciara Clarke at Harrington Starr