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Senior Java/Python developer

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Barclays

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Location:
United Kingdom , London

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

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.

Job Responsibility:

  • 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

Requirements:

  • 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

Nice to have:

  • 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
What we offer:
  • Competitive holiday allowance
  • Life assurance
  • Private medical care
  • Pension contribution

Additional Information:

Job Posted:
January 08, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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