Senior Python Developer – API & Data Connectivity (Freelance)

Keyrus is an international consulting firm, specializing in the integration of data intelligence and Digital solutions. With over 3,500 employees spread across 27 countries, Keyrus continues to deliver on such projects to a wide range of clients from various industries including but not limited to Banking / Finance, Healthcare / pharmaceuticals, FMCG, Oil & Gas, and more.

As part of Keyrus’ solution delivery, we are also in a position to recruit and place technical consultants to complement on existing client projects with their expertise. As such, we seek innovative and agile people to support ambitious and forthcoming technological challenges.

About the Role

We are looking for a Senior Python Engineer specialised in building API and streaming data connectors for data-intensive environments. You will be responsible for integrating market and alternative data sources, normalising the data, and storing it efficiently for downstream analytics and backtesting.

This role is hands-on and delivery-focused : you will build connectors end-to-end, from discovery to production-ready ingestion.

Key Responsibilities

• Develop and maintain Python-based API / WebSocket connectors
• Integrate both market data and alternative datasets
• Handle historical backfill + real-time / streaming ingestion
• Persist data to S3 / Parquet / ArcticDB (or similar columnar stores)
• Ensure data quality, availability, schema consistency and metadata tracking
• Work with internal quant / data consumers to align on requirements

Required Experience

Nice-to-Have

Soft Skills