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Senior Java​/Python developer

Job in Greater London, London, Greater London, EC1A, England, UK
Listing for: Barclays
Full Time position
Listed on 2026-01-13
Job specializations:
  • Software Development
    Software Engineer, Full Stack Developer, Java Developer, DevOps
Job Description & How to Apply Below
Location: Greater London

Join Barclays as a Java and Python developer and be involved in building the technology platform supporting the Barclays Quantitative Investment Strategies business (QIS). The team is working on a multi-year transformation programme to build a more capable, streamlined, and high-performance platform, as a key enabler for the ambitious expansion of the Barclays QIS business.

To be successful as a Java / Python developer within this team, you should have experience with:

  • Java development – Core Java, Collections, Multi-Threading and Concurrency, OOPS concepts, Exception Handling, JVM Concepts, Spring Framework (Spring Boot), SQL
  • Python development - Python, service frameworks FasAPI/Flask/Gunicorn, OOPS concepts, Exception Handling, Data Analysis and data structures / pandas / numpy;
    Data Serialization; interaction with data - SQL Alchemy/Redis/S3;
    Best python coding practices.
  • Ability to thrive in a pressured front office environment – fast-moving, complex, volatile, uncertain.

Other highly valued skills include:

  • Solid understanding of good software development practices (TDD, SDLC, Containerization, instrumentation, observability).
  • Experience in developing, maintaining & debugging multi-protocol distributed services (REST / MQ / Solace / Kafka / etc)
  • Good business knowledge of equity derivatives and risk, or derivatives more widely, and ability to acquire new knowledge quickly on the job.

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

This role would be based out of our Barclays headquarters, 1 Churchill Place, London

Purpose of the role

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

Accountabilities
  • 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.
Assistant Vice President Expectations
  • 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 inclusion of other areas of specialisation to complete assignments. They will identify new directions for assignments and/ or projects, identifying a combination of cross functional methodologies or practices to…
Position Requirements
10+ Years work experience
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