Platform & Data Engineer - Financial Services

Twenty Recruitment Group; Greater London; Hybrid; GBP 74,000 - 97,000; Part time

Job summary

Twenty Recruitment Group is seeking a Platform & Data Engineer for a six-month contract with Inside IR35. Hybrid working in the UK. Design and develop backend applications and data platforms, focusing on scalable distributed systems and high-volume data processing.

You will mentor peers and contribute to architecture decisions while delivering robust engineering solutions. The role emphasizes reliability, automation, and the use of modern data-platform technologies within a financial markets

Qualifications

• 5+ years commercial software engineering experience.
• Backend development experience in Java and Spring environments.
• Experience with Python and/or the Microsoft technology ecosystem.
• Strong understanding of distributed systems and scalable application design.
• Experience designing modular applications or microservices architectures.
• Strong knowledge of software engineering principles, design patterns and clean code practices.
• Experience with automated testing across unit, integration and end-to-end environments.
• Good understanding of CI/CD, automated deployment and modern software delivery practices.
• Experience with event-driven architectures, messaging or streaming technologies such as Kafka.
• Exposure to high-volume data processing or distributed data platforms.
• Strong SQL and relational database experience.
• Experience supporting highly available, business-critical production systems.
• Comfortable investigating performance, reliability and production issues.
• Able to work independently while collaborating across technical and non-technical teams.
• Experience mentoring or providing technical guidance to other engineers.
• A degree in computer science, engineering or a related discipline is advantageous

Responsibilities

• Design and develop backend applications, services and data-driven platforms.
• Build and enhance distributed systems handling high volumes of data.
• Assess technical approaches and contribute to architecture and design decisions.
• Translate business and technical requirements into robust engineering solutions.
• Produce clear technical designs and documentation.
• Develop automated testing across different stages of the software lifecycle.
• Contribute to CI/CD, release automation and improvements to engineering practices.
• Work closely with engineering, product, architecture and operational teams.
• Investigate and resolve complex issues affecting production systems.
• Support and mentor other engineers within the team.
• Improve the performance, resilience and maintainability of existing platforms.

Skills

5+ years exp

Java & Spring

Python

Distributed systems

Microservices

Clean code / patterns

Automated testing

CI/CD

Kafka

SQL

Mentoring

Education

CS/Engineering degree advantageous

Tools

Java

Spring

Python

Kafka

SQL

Job description

Salary: £74,000 - 97,000 per year

Requirements:

• 5 years of commercial software engineering experience
• Strong backend development experience in Java and Spring environments
• Experience working with Python and/or the Microsoft technology ecosystem
• Strong understanding of distributed systems and scalable application design
• Experience designing modular applications, services or microservice-based architectures
• Strong knowledge of software engineering principles, design patterns and clean code practices
• Experience with automated testing across unit, integration and end-to-end environments
• Good understanding of CI/CD, automated deployment and modern software delivery practices
• Experience with event-driven architectures, messaging or streaming technologies such as Kafka
• Exposure to high-volume data processing or distributed data platforms
• Strong SQL and relational database experience
• Experience supporting highly available, business-critical production systems
• Comfortable investigating performance, reliability and production issues
• Able to work independently while collaborating across technical and non-technical teams
• Experience mentoring or providing technical guidance to other engineers
• A degree in computer science, engineering or a related discipline is advantageous

Responsibilities:

• Design and develop backend applications, services and data-driven platforms
• Build and enhance distributed systems handling high volumes of data
• Assess technical approaches and contribute to architecture and design decisions
• Translate business and technical requirements into robust engineering solutions
• Produce clear technical designs and documentation
• Develop automated testing across different stages of the software lifecycle
• Contribute to CI/CD, release automation and improvements to engineering practices
• Work closely with engineering, product, architecture and operational teams
• Investigate and resolve complex issues affecting production systems
• Support and mentor other engineers within the team
• Improve the performance, resilience and maintainability of existing platforms

Technologies:

• Backend
• CI/CD
• Support
• Java
• Kafka
• Python
• SQL
• Spring

More:

We are a well-established financial markets organisation investing in the development and modernisation of our core technology platforms. Our engineering team builds and supports business-critical applications and data services, with an emphasis on reliability, scalability, automation and engineering quality. We are seeking a Platform & Data Engineer for an initial six-month contract, likely to extend. The role is Inside IR35, with the day rate to be discussed with suitable candidates. We offer a hybrid working environment and the opportunity to work on complex platform, data-streaming and distributed-system challenges.

last updated 40 week of 2026