Full Stack Engineer in London

Ellipse is an industry leader in the collection, analysis and dissemination of live sports performance data. Our goal is to engage a diverse audience with new stories about the sports we love. We create products and services across cricket, football, horse racing, rugby and tennis that enrich the experience of fans, athletes, and teams worldwide. Our data is a central component of media coverage, betting operations, athlete feedback and coach decision-making in some of the biggest competitions.

With ambitious growth plans and driving to achieve our multi-year customer contract, we are seeking an experienced Full Stack Engineer (Software Engineer Level) to join our dynamic Horse Racing team. In this role, you will be responsible for designing, implementing, and maintaining software applications across our Horse Racing technology stack, which will be an overlap of AWS Product Dev work, Data Engineering responsibilities and UI Development work.

As a Full Stack Engineer, you will play a crucial role in contributing to Back end & Front end design work, and delivering value by:

• Designing data engineering workflows, developing Python modules & APIs for our custom product.
• Providing support for high value leagues & tournaments.
• Ensuring the scalability, performance, and security of our applications.

Key Responsibilities

• Design, build, and maintain scalable data workflows and pipelines on AWS (using S3, Lambda, RDS and related services) to support downstream applications.
• Develop robust, production-grade Python services and ETL/ELT workflows, ensuring high data quality, reliability, and performance.
• Write optimized and maintainable SQL for data transformation, aggregation, and analytics across large, complex datasets.
• Architect and maintain secure, well-documented RESTful (and GraphQL) APIs to ensure seamless communication between client-side applications and backend services.
• Collaborate with team leaders, data scientists, analysts, and application engineers to translate business requirements into well-designed backend and front end capabilities.
• Ability & willingness to provide support to the customers on an ongoing basis for self-developed & team-developed features, and ensure high availability of the Horse Racing systems, for our customers.

Role Requirements

• 4–6 years of hands-on experience building and operating Frontend and Backend systems in production, using React, Python, AWS & SQL.
• Ability to work with UX Designers, performing analysis of the front end designs, providing inputs to avoid UI rework and deep understanding of portal development will be a key for this role.
• Practical experience in all stages of the Product Development Life Cycle is required (design, build, test, deploy, rollback), with good understanding in identifying tech-debts, automation testing, working with monitoring tools and application workload management is expected.
• Solid Python development experience for data processing, services, and automation.
• Strong working knowledge of SQL for data transformation, validation, and analytics.
• Experience building, integrating, or consuming REST APIs for data access and system integration.
• Good understanding of system reliability, monitoring, security, and scalability in cloud-native environments.

Nice to have

• Experience deploying and managing services on AWS EKS / Kubernetes, including containerized workloads would be a strong advantage.
• Experience with infrastructure as code (Terraform, CloudFormation, or similar) for managing cloud and Kubernetes resources and streaming or near-real-time data systems (Kafka, Kinesis, event-driven architectures) will be a big plus for the role.
• Familiarity with observability tools (CloudWatch) and production troubleshooting for the same will be an added advantage.

Equality & diversity

Ellipse is committed to building an open and inclusive culture that supports personal development and learning. Ellipse believes in the principle of equal opportunity in employment and its employment policies for recruitment, training, development and promotion despite any differences based on individual grounds of race, colour, nationality, religion or belief, sex, sexual orientation, marital status, age, ethnic and national origin, disability or gender reassignment.

Hybrid role with an expectation to work from our new offices in London and Leeds when required.

Company pension scheme, company life insurance, flexible employee benefits.