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Python Developer

Technology
Haystack
London, United KingdomTodayUntil 14/06/2026
Full time

Job description

Python Developer | £50 - £60 per hour

We're working with a leading global financial technology partner at the forefront of Equities Derivatives innovation on this exciting opportunity.

This is a high-impact role within the fastest-growing area of Equities Derivatives Technology, focusing on the sophisticated automation of Structured Notes and complex financial products. You will leverage Python and SQL within a high-performance n-tier architecture to build mission-critical tools that drive STP rates and optimize global Treasury workstreams.

The Role

  • Lead the design and build-out of automated applications and microservices for Structured Products, driving end-to-end automation and real-time exception alerting.
  • Optimize Treasury workstreams by increasing Straight Through Processing (STP) rates and integrating complex data attributes for global decision-making.
  • Architect and implement robust, cross-language REST-based services within a high-concurrency, server-side Python environment.
  • Collaborate directly with Sales, Trading, and Structuring teams to translate complex business requirements into scalable technical solutions.
  • Drive engineering excellence through Agile methodologies, including Test Driven Development (TDD), pair programming, and continuous integration.

What You'll Need

  • At least 7 years of professional software development experience, specializing in Python for complex server-side functionality.
  • 3+ years of deep domain expertise in Front-Office Equities Derivatives systems (Structured Notes or Structured Products knowledge is a massive plus).
  • Advanced SQL skills, specifically within an Oracle database environment, alongside Shell scripting and Unix/Linux proficiency.
  • Proven experience in software architecture, utilizing RESTful n-tier designs and automated testing frameworks (Unit, Integration, and Acceptance testing).
  • A proactive "self-starter" mindset with the ability to mentor junior developers and influence architectural decisions across different workstreams.

What's On Offer

  • Highly competitive hourly rate (£50 - £60) for a long-term, prestigious financial project.
  • Exposure to senior stakeholders across Trading and Structuring in a top-tier investment banking environment.
  • Opportunity to work at the cutting edge of financial automation and high-frequency derivatives technology.
  • Dynamic, fast-paced culture that rewards enterprising developers and technical innovation.

Apply via Haystack today!

Keywords
monthsOfExperience: 84UnixMASSIVELinuxNI MassiveOracle DatabaseAcceptance testingPair ProgrammingPythonSqlDeep learningTest-driven developmentShell script

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