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Senior Python Developer Our Client is looking to recruit a seasoned Senior Python Software Developer with at least 5 to - 8 years experience of developing software in Python . You must have excellent technical excellence in Python in developing a is required. Excellent verbal communication skills (English a must) Ability to provide recommendations for the e2e architecture infrastructure Proven experience with designing back-end architectures. An understanding of application performance tuning and resource usage Ability to troubleshoot existing scripts and do point bug fixes / application redesign Highly experienced in multiprocessing, multiprocessing, and asynchronous python development (asyncio module) Experience with Docker containers, micro services, and CI/CD pipeline a plus Experience with Django, Flask is a plus Working knowledge with MongoDB, JSON, sync/async architecture Working knowledge of networking theory (TCP/IP) or strong desire to learn it You collaborate with other engineers and people in the organization to improve our solution delivery You believe in Lean/Agile principles and actively work to incorporate them in the organization You care about your craft and strive towards producing high-quality code. A very high degree of autonomy, self-learning and problem solving is expected You should enjoy working in a team and collaborating on projects and codebases. This position can be based anywhere in Europe. The rate will depend upon the level of expertise. The duration of this contract assignment is 6 months. Do send your CV to us in Word format along with your daily rate and availability.

Essential SkillsExpert-level Python development experience. Strong commitment to writing clean, maintainable and testable code. Advanced SQL knowledge and database optimisation experience. Deep understanding of Linux environments. Excellent knowledge of algorithms and data structures. Proven experience leading technical projects and mentoring engineers. Degree in Computer Science or a related technical discipline, or equivalent commercial experience. Highly DesirableExperience with Test-Driven Development (TDD), Behaviour-Driven Development (BDD) or similar testing methodologies. Knowledge of PostgreSQL and/or Snowflake. Experience with modern Python web frameworks such as Django, Flask or FastAPI. Familiarity with event-streaming technologies including Apache Kafka. Experience building data pipelines using Apache Airflow. Exposure to Java development. Why Join?Work on cutting-edge electronic trading technology. Influence the architecture of business-critical systems. Lead projects with real commercial impact. Collaborate with high-performing engineering teams across Europe and the US. Gain exposure to complex, high-throughput, low-latency environments. Grow your leadership and technical expertise in a challenging and rewarding setting. To find out more about Huxley, please visit Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC387148 England and Wales

What You'll Be DoingAs a Senior Python Engineer, you'll be responsible for designing, developing and enhancing the batch processing and operational systems that support one of the world's leading exchange operators. You'll: Design and build robust, highly reliable Python applications that underpin Client's Europe's trading operations. Collaborate closely with Product, Business Development and Sales teams to create innovative new exchange services and features. Champion software craftsmanship through clean architecture, maintainable code and rigorous testing practices. Participate in research and development initiatives, evaluating and implementing emerging technologies that can drive competitive advantage. Support critical production systems as part of a rotating support rota, responding to incidents and contributing to root cause analysis and continuous improvement initiatives. Work alongside talented engineering teams across our global organisation, sharing knowledge and driving technical excellence. What We're Looking ForEssential SkillsStrong commercial experience with Python development. Passion for writing clean, maintainable and testable code. Solid understanding of Linux environments. Experience with SQL and advanced database querying techniques. Strong grasp of algorithms, data structures and software engineering fundamentals. Computer Science degree or equivalent technical background. Highly DesirableExperience with Test-Driven Development (TDD), Behaviour-Driven Development (BDD) or similar testing methodologies. Experience implementing AI-enabled software development lifecycles and practical use of modern engineering tools such as Claude Code, OpenAI Codex, or similar AI-assisted development platforms. Preferred ExperiencePostgreSQL and/or Snowflake. Modern Python web frameworks including Django, Flask or FastAPI. Event-driven architectures and streaming technologies such as Apache Kafka. Data orchestration and pipeline platforms such as Apache Airflow. Java development experience. Financial technology experience, including market data, order management, algorithmic trading, exchange technology, financial systems integration, regulatory compliance or related domains. To find out more about Huxley, please visit Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC387148 England and Wales

At CGI, we deliver secure, innovative technology solutions that help our clients tackle complex challenges and achieve meaningful outcomes. As a Senior Python Developer, you'll help build and support cloud-native applications that power critical services, working with modern technologies in a collaborative environment where your ideas, expertise, and contributions will make a real impact. You'll have the opportunity to influence engineering best practices, drive continuous improvement, and develop your career alongside experienced professionals. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position.