Python Developer

Full Stack Python Developer

💰 £400/day (Inside IR35) 📍 London (3 days per week onsite)

📅 12-Month Contract

Our client is looking for an experienced Full Stack Python Developer to design, develop and support enterprise-grade applications within a large financial services environment. This is a hands-on engineering role requiring strong Python, Flask, MongoDB, JavaScript and Linux/Shell scripting experience. You’ll build scalable backend services and APIs alongside modern web interfaces, while contributing to application performance, automation, production support and engineering best practices.

Key Responsibilities

• Design and develop scalable applications and microservices using Python and Flask.
• Build and maintain REST APIs and integrations with enterprise platforms.
• Develop reusable Python libraries, utilities and backend components.
• Build responsive front-end applications using JavaScript and React or Angular.
• Integrate front-end applications with Python-based backend services.
• Design and optimise MongoDB schemas, queries, indexes and aggregation pipelines.
• Develop Shell/Bash scripts for automation, monitoring and operational processes.
• Troubleshoot applications within Linux/Unix environments and perform root cause analysis.
• Support CI/CD, automated deployments and DevSecOps engineering practices.
• Participate in code reviews, testing, technical design and documentation.
• Support high-availability, business-critical applications and resolve production issues.
• Collaborate with architects, QA, infrastructure and globally distributed engineering teams.

Essential Skills

• Strong hands-on Python development experience.
• Strong commercial experience with Flask.
• Experience developing REST APIs and microservices.
• Strong understanding of OOP, multithreading and concurrent processing.
• Front-end development experience with JavaScript and React.js or Angular.
• Strong MongoDB / NoSQL experience, including indexing, aggregation and query optimisation.
• Strong Linux/Unix experience.
• Hands-on Shell/Bash scripting experience.
• Experience with Git, Bitbucket, Jenkins and Jira.
• Strong experience working within Agile/Scrum development environments.

Desirable Skills

• Docker and Kubernetes
• Kafka / event-driven architectures
• Redis
• Splunk / Grafana
• AWS, Azure or GCP
• CI/CD and DevSecOps
• High-availability and mission-critical applications
• Financial Services / Capital Markets experience
• Trading, Risk, Investment Banking or Wealth Management technology exposure

8+ years of software development experience is preferred.

Please apply with your CV and we'll be in touch. Thanks!