> Markdown version of [/jobs/ext/2930357-senior-python-developer](https://www.wearedevelopers.com/jobs/ext/2930357-senior-python-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Python Developer - **Company:** Oscar Associates (UK) Ltd - **Location:** London, UK (Remote available) - **Experience:** Expert - **Salary:** £143,000.0 - £169,000.0 - **Contract:** Temporary contract - **Skills:** Airflow, JIRA, Big Data, BigQuery, Data Infrastructure, Relational Databases, Python (Programming Language), PostgreSQL, Reference Data, Data Processing, Data Ingestion, Git, Pandas, Terraform, Data Pipelines - **Published:** September 16, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5885094250 ## About the Role * Strong commercial experience as a Senior Python Developer / Software Developer. * Excellent hands-on Python development skills. * Experience working with PostgreSQL. * Strong experience working with data processing libraries such as Pandas and/or Polars. * Experience working with data ingestion, transformation or processing pipelines. * Comfortable working within collaborative development environments using Git and Jira. * Strong problem-solving skills and an ability to work with complex datasets. * Able to work effectively alongside data engineers, developers and wider technical teams. Nice to Have * Knowledge or experience within financial markets / securities. * Experience working with GCP BigQuery. * Experience with GCP Cloud SQL. * Experience with Terraform. * Experience with Apache Airflow. * Understanding of security reference data, pricing data or corporate actions. ## Description We're looking for a Senior Python Developer to join a data-focused team working on a new Security Master platform for a financial services client. The project will involve building a multi-asset security data service covering equities, fixed income, funds and alternative assets across both the UK and US markets. You'll work alongside an established client Data Team, contributing hands-on Python development to the ingestion, processing and distribution of critical financial data. This is an exciting opportunity for a senior developer who enjoys working with data-intensive systems, Python and modern cloud technologies, with the opportunity to develop further expertise within the financial services domain. What You'll Be Doing * Contribute to the development of a new Security Master / security data service. * Build and maintain Python-based data ingestion and processing pipelines. * Ingest, clean, transform and process security reference data, daily pricing data and corporate actions. * Work with multi-asset data covering equities, fixed income, funds and alternative assets. * Support the internal distribution of high-quality, reliable security data. * Work closely with the client's Data Team and wider technical stakeholders. * Develop robust, maintainable and scalable Python solutions. * Work with relational databases, particularly PostgreSQL. * Use modern Python data tools such as Pandas and/or Polars. * Contribute to development workflows using Git and Jira. * Help ensure data quality, consistency and reliability throughout the platform. ## Related Videos - [Python-Based Data Streaming Pipelines Within Minutes](https://www.wearedevelopers.com/videos/1233-python-based-data-streaming-pipelines-within-minutes) - [Advanced Typing in TypeScript](https://www.wearedevelopers.com/videos/496-advanced-typing-in-typescript) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Data Science on Software Data](https://www.wearedevelopers.com/videos/162-data-science-on-software-data) - [Getting to Know Your Legacy (System) with AI-Driven Software Archeology](https://www.wearedevelopers.com/videos/1437-getting-to-know-your-legacy-system-with-ai-driven-software-archeology) ## Related Articles - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Data Analyst Salary in the UK](https://www.wearedevelopers.com/magazine/278-data-analyst-salary-in-the-uk) - [The 13 Best Python Libraries for Developers in 2025](https://www.wearedevelopers.com/magazine/371-the-13-best-python-libraries-for-developers-in-2025) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk)