Durlston Partners· London

You'll use Java, Spring Boot, Kafka, and AWS (EKS, S3), plus PostgreSQL, SQL Server, and CI/CD. The team builds the core trade processing, reconciliation, and reporting platform for a leading systematic hedge fund’s multi-asset trading, collaborating closely with traders and quants.

You will design and build Python services and APIs using AWS (Lambda, S3, ECS/EKS, Step Functions, Aurora), Kafka, and PostgreSQL/SQL Server/Snowflake to support portfolio construction, trading, and analytics. This Investment Technology role turns research tools into production-grade platforms for Portfolio Managers and Quantitative Researchers across Equities, Fixed Income, and Alternatives.

Build and own the cloud infrastructure for live AI-driven trading systems, using AWS, Kubernetes, Terraform, Python, Kafka, PostgreSQL, Redis, and ClickHouse. You will design deployment pipelines, multi-region environments, and observability with Grafana, Prometheus, and Loki. This is a founding engineering role, giving you direct ownership of the platform and architecture.

CMC Markets★3.8 (26)· London

Build scalable ETL/ELT pipelines using Python, SQL, Kafka, Spark, Parquet, Arrow, and modern data lake technologies. You will process billions of high-frequency market data records—trades, ticks, order books—to support quantitative research and production trading systems at CMC Markets.

Fidelity Investments★4.0 (5.1k)· London

Use Rust, Python, SQL/Snowflake, and blockchain data tools (The Graph, Dune) to build research infrastructure and develop yield-generating DeFi strategies. You will extend backtesting systems and implement on-chain analytics for the Quantitative Strategies team within Fidelity Digital Assets™.

Invesco★3.9 (499)· London

Senior Engineer works with Python, SQL (PostgreSQL, SQL Server), AWS (Lambda, S3, ECS/EKS, Step Functions, Aurora), Kafka, CI/CD, and AI tools (Copilot, Claude, ChatGPT, Bedrock). The role designs and builds applications and data pipelines for Invesco’s ETF platform, supporting portfolio construction, trading, analytics, and operations across Equities, Fixed Income, and Alternatives.

You will work with Python, TypeScript, AWS (Cognito, Lambda, Fargate, API Gateway, S3, IAM), Terraform, PostgreSQL, and AI tools (Claude, GitHub Copilot, Cursor, LLM APIs). The team builds and evolves scalable microservices for BMLL Lab & Vantage, the company’s SaaS products for data science and visualisation on large financial datasets.

LSEG★3.7 (402)· London

FTSE Russell seeks a Quantitative Engineer to build scalable applications supporting index calculations, back-testing, and analytics using Python, SQL, numpy, pandas, scipy, and cloud-native solutions with RESTful APIs and CI/CD pipelines. The role combines software engineering with quantitative finance to develop tools for index monitoring, validation, and rebalancing across equity, fixed-income, currencies, and commodities. Requires 2+ years in quantitative analytics within financial services and an advanced degree in Mathematics, Computer Science, Financial Engineering, Statistics, or Physics.

Old Mission Capital, a proprietary trading firm, seeks a Python Software Engineer with 3+ years of production experience to refine and advance trading systems and mission-critical applications. You'll work with Python on Linux, relational databases like PostgreSQL or MySQL, and collaborate with quants, traders, and research teams to enhance system adaptability and scalability across multiple asset classes.