Python Developer

N Consulting Limited; Greater London; On-site; GBP 55,350 - 64,575; Full time

Job summary

N Consulting Limited is seeking a Sr Python Developer for a 6-month contract in London. The ideal candidate will have strong experience in trading and risk management systems, with 6-10 years in Python development. Responsibilities include building backend applications, data processing pipelines, and collaborating with financial teams. Proficiencies in SQL, leveraging libraries like Pandas and NumPy, and RESTful API development are essential. The role promises a dynamic environment in investment banking within a collaborative setting.

Qualifications

• 6–10 years of strong experience in Core Python development.
• Proficient in SQL with the ability to handle complex queries.
• Experience with data processing libraries like Pandas and NumPy.
• Knowledge in building RESTful APIs/services using frameworks like Flask or FastAPI.

Responsibilities

• Develop and enhance Python-based applications for trading and risk.
• Build data processing pipelines for trade and risk workflows.
• Collaborate with quants and traders to translate business requirements into solutions.
• Maintain high code quality and participate in code reviews.

Skills

Core Python development

SQL skills

Pandas

NumPy

RESTful APIs/services

Data structures and performance optimization

Unix/Linux

Job description

LocationLondon, England, United Kingdom# Python Developer at N Consulting LtdLocationLondon, England, United KingdomSalary£300 - £350 /dayJob TypeContractDate PostedMay 6th, 2026Apply Now**Role: – Sr Python Developer****Duration:6 Months Contract**We are looking for a Python Developer with strong experience in **trading and risk management systems** within investment banking. The role involves building backend applications and data processing logic supporting risk calculations, trade workflows and reporting.**Key Responsibilities**• Develop and enhance **Python-based applications** for trading and risk use cases• Build **data processing pipelines and automation scripts** for trade, risk and reconciliation workflows• Work with **large financial datasets** to support PnL, risk and reporting requirements• Contribute to **system design, architecture and scalability decisions**• Collaborate with **quants, traders and risk teams** to translate business requirements into technical solutions• Develop and integrate **REST APIs and backend services**• Contribute to **CI/CD pipelines** and **deployment** processes• Support **production systems (L2/L3)** including debugging, enhancements and performance optimization• Write and maintain **unit and integration tests**. Ensure **high code quality and test coverage**• Participate in **code reviews** and **mentor** junior developers where required**Must-Have Skills**• Strong experience in **Core Python development (6–10 years)**• Strong **SQL skills** with ability to handle complex queries and large datasets• Experience with **Python libraries (Pandas, NumPy)** for data processing• Experience building **RESTful APIs/services (Flask / FastAPI / Django)**• Strong understanding of **data structures and performance optimization**• Experience working with **large-scale data processing and performance optimization**• Working knowledge of **Unix / Linux environments and basic shell scripting****Domain Experience (Critical)**• Experience working in **Investment Banking / Capital Markets environments**• Hands-on exposure to: Market Risk / CCR / PnL / Trade lifecycle / Reconciliation• Understanding of financial products such as: Derivatives (swaps, futures, options), bonds**Good-to-Have**• Exposure to **PySpark or large-scale data processing**• Experience working with **quants or pricing models**• Basic scripting (Unix / Bash)