Python SDET- Trading platform- Contract

Reference: 98249PYTHON_1789147396

Python SDET | Trading Platforms | Contract

Python SDET required for a leading financial markets organisation building and enhancing high-performance trading systems.

This role sits within a highly technical engineering team responsible for mission-critical trading platforms, market data services and distributed microservices. You'll play a key part in designing automated test frameworks, driving quality engineering practices and embedding automation throughout the CI/CD delivery lifecycle.

Essential Skills

  • Strong Python development experience
  • Commercial PyTest automation experience
  • SDET / Software Engineer in Test background
  • API and integration testing
  • Microservices and distributed systems
  • CI/CD pipeline automation
  • Docker and Kubernetes
  • SQL and data validation
  • Linux environment

Highly Desirable

  • Equities, FX, Fixed Income, Commodities or Crypto trading platforms
  • Market data systems
  • Kafka or messaging technologies
  • Contract testing (Pact, PactFlow or similar)
  • AWS, Azure or GCP
  • Low latency or high-throughput systems

What You'll Be Doing

  • Building robust Python automation frameworks using PyTest
  • Designing integration, API and end-to-end test solutions
  • Automating validation across trading workflows and market data feeds
  • Working closely with developers, quants and platform engineers
  • Driving test automation within modern CI/CD pipelines
  • Improving system quality, reliability and release confidence

Experience Required

We're particularly interested in engineers who have worked on electronic trading platforms, market data systems, exchange connectivity, order management systems, pricing platforms or other real-time financial systems.

Python | PyTest | SDET | Trading | Market Data | APIs | Microservices | CI/CD | Docker | Kubernetes

Please send across an updated CV if this position is of interest

GCS is acting as an Employment Business in relation to this vacancy.

COMPETITIVE SALARY
Added 11/09/2026
Reference: 98249PYTHON_1789147396

Python SDET- Trading platform- Contract

London, England, United Kingdom Contract Testing & QA

Other similar jobs

Product Development Associate - Trading Cards & TCGs (Contract)

Added 23/07/2026

Are you passionate about Trading Cards, TCGs, collectibles and creative product development?We are seeking a Product Development Associate to support the creation of innovative trading card products and packaging for leading entertainment brands.Working with creative teams, licensees and stakeholders, you will help take products from concept through to approval, ensuring strong design execution, brand alignment and timely delivery.Product Development Associate - Trading Cards & TCGsLocation: London Once a week In office Contract: Project Hire | Inside IR35Duration : 12 months Initially Key Responsibilities:Support product and packaging development projects.Review creative submissions and provide feedback.Coordinate approvals, assets and project timelines.Research trends across...

Learn more

Senior SDET / QA Automation Engineer

Added 08/09/2026

We are seeking an experienced Senior SDET / QA Automation Engineer to join our technology team. The ideal candidate will have a strong background in software quality assurance, test automation, application development, and database technologies. This role involves designing and executing test strategies, developing automation frameworks, collaborating with cross-functional teams, and ensuring the delivery of high-quality software solutions.The successful candidate will possess a blend of QA expertise, software development skills, and database knowledge, with experience working across the full software development lifecycle.Key ResponsibilitiesDevelop and execute comprehensive test plans, test cases, and test scripts to ensure software quality and reliability.Design, build,...

Learn more

SDET

Added 24/07/2026

Software Development Engineer in Test (SDET)Engineer quality. Build automation. Deliver confidence.We're looking for a Software Development Engineer in Test (SDET) who is passionate about building scalable automation solutions and embedding quality throughout the software development lifecycle. This is more than a traditional testing role-it's an engineering-focused position where you'll design, develop, and maintain robust test frameworks, automation tools, and quality solutions that enable rapid, reliable software delivery.As an SDET, you'll work alongside software engineers, product teams, and DevOps professionals to ensure applications are built with quality at their core. You'll leverage coding expertise to create intelligent automation solutions, improve testing...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

SDET

Added 02/07/2026

We are looking for a SDET with strong automation expertise to build and scale test frameworks from scratch. The role requires deep understanding of automation architecture, CI/CD integration, cloud-based testing, and end-to-end validation across web, API, and mobile platforms.Key ResponsibilitiesDesign and develop scalable test automation frameworks from scratchImplement parallel testing (cross-browser and multi-device execution)Build and maintain automated tests for web, APIs, and mobile applicationsDevelop scripts for real device testing in local labs and Sauce Labs environmentsIntegrate automation into CI/CD pipelines using Concourse and GitHub ActionsPerform troubleshooting, debugging, and root cause analysisCollaborate with cross-functional teams to ensure product qualityRequired SkillsStrong programming...

Learn more

Cloud Platform Architect / Principal Platform Engineer

Added 27/07/2026

Senior Cloud Platform ArchitectCloud Infrastructure | Kubernetes | Multi-Cloud | Infrastructure Modernisation11 Months Fix-Term Contract with chances of conversion into permanent.We're looking for a Senior Cloud Platform Architect to help drive the transformation of critical infrastructure services into a modern, cloud-native environment.This role sits at the heart of a large-scale infrastructure modernisation programme, supporting the redesign, migration and operation of foundational platform services across public cloud environments.You'll work on highly available, business-critical services while helping shape the future cloud operating model through automation, containerisation and infrastructure-as-code practices.What You'll Be DoingLead the architecture and modernisation of core infrastructure services within cloud-native...

Learn more

Senior .NET Azure Engineer -Policy-as-Code Platform- Contract

Added 19/08/2026

Senior .NET Azure EngineerPolicy-as-Code PlatformContractMy client, a leading technology organisation is seeking a Senior .NET Azure Engineer to join a specialist team building a next-generation Policy-as-Code and software delivery governance platform.This is an opportunity to work on a highly strategic engineering initiative focused on automating compliance, governance and deployment controls across large-scale cloud environments. You'll be building the services that connect software engineering workflows with automated policy decisions, helping ensure that releases are secure, audit-able and compliant by design.The RoleYou'll design and develop cloud-native services that integrate with enterprise development platforms and automated governance systems. Working in an API-first, event-driven...

Learn more

Python Developer

Added 24/08/2026

Job SummarySeeking a Senior Python Developer to build and productionize a cloud-based Quality Control platform used to inspect robotic storage racks through 3D camera systems. The role focuses on developing AWS IoT data pipelines, backend services, cloud integrations, and testing frameworks to support large-scale robotics deployments across multiple sites.Key ResponsibilitiesBuild and maintain AWS IoT data pipelines using MQTT, AWS IoT Core, Lambda, and S3.Develop scalable backend services in Python for processing image and video data.Integrate cloud services with internal APIs and downstream systems.Own integration testing and ensure end-to-end system reliability.Review, validate, and enhance AI-generated code.Contribute to CI/CD, DevOps, monitoring, and...

Learn more

Python Developer

Added 21/08/2026

Job SummarySeeking a Senior Python Developer to build and productionize a cloud-based Quality Control platform used to inspect robotic storage racks through 3D camera systems. The role focuses on developing AWS IoT data pipelines, backend services, cloud integrations, and testing frameworks to support large-scale robotics deployments across multiple sites.Key ResponsibilitiesBuild and maintain AWS IoT data pipelines using MQTT, AWS IoT Core, Lambda, and S3.Develop scalable backend services in Python for processing image and video data.Integrate cloud services with internal APIs and downstream systems.Own integration testing and ensure end-to-end system reliability.Review, validate, and enhance AI-generated code.Contribute to CI/CD, DevOps, monitoring, and...

Learn more
At least 8 characters, 1 uppercase, 1 lowercase and 1 special character or number
Your file must be a doc, docx or pdf. No larger than 5MB.