Python Developer

hackajob is collaborating with Barclays to connect them with exceptional professionals for this role.

Join Barclays as a Python Developer, contributing to the design and enhancement of robust Python web applications while working on existing platforms to improve reliability and developer workflows. Leveraging strong quantitative skills, I apply data-driven insights to optimize system performance, support engineering excellence, and drive scalable solutions across complex, high-impact environments.

• Experience with Python web applications using FastAPI, or Flask
• Proven experience designing and implementing RESTful APIs at scale
• Strong understanding of async/await patterns and concurrent programming
• Proficient in SQL with Oracle
• Experience designing normalized schemas and writing optimized queries
• Knowledge of database indexing, transactions, and performance tuning
• Deep understanding of OOP principles (SOLID, DRY, composition over inheritance)
• Practical application of design patterns (Factory, Strategy, Repository, etc.)
• Experience with test-driven development (pytest, unittest)
• Experience working with a senior Python engineering tech stack and best practices

• Docker containerization and multi-stage builds
• Kubernetes deployments, services, and configuration management using Helm
• Git Lab CI/CD pipeline configuration and optimization
• Git workflows (merge requests, code review, branching strategies)
• ELK Stack (Elasticsearch, Logstash, Kibana) for log aggregation or Prometheus/Grafana for metrics/alerting
• Open Shift or similar container platforms
• Message queues (Rabbit
  
  MQ, Kafka, Redis)

You may be assessed on key critical skills relevant to success in this role, such as risk and controls, change and transformation, business acumen, strategic thinking, digital and technology skills, as well as job-specific technical skills.

This role is based in London.

To design, develop and improve software, utilising various engineering methodologies, that provides business, platform, and technology capabilities for our customers and colleagues.

• Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance.
• Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives.
• Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing.
• Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth.
• Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions.
• Implementation of effective unit testing practices to ensure proper code design, readability, and reliability.

• To advise and influence decision making, contribute to policy development and take responsibility for operational effectiveness. Collaborate closely with other functions/ business divisions.
• Lead a team performing complex tasks, using well developed professional knowledge and skills to deliver on work that impacts the whole business function. Set objectives and coach employees in pursuit of those objectives, appraisal of performance relative to objectives and determination of reward outcomes
• If the position has leadership responsibilities, People Leaders are expected to demonstrate a clear set of leadership behaviours to create an environment for colleagues to thrive and deliver to a consistently excellent standard. The four LEAD behaviours are: L – Listen and be authentic, E – Energise and inspire, A – Align across the enterprise, D – Develop others.
• OR for an individual contributor, they will lead collaborative assignments and guide team members through structured assignments, identify the need for the…