Senior Software Engineer

DraftKings; City Of London; On-site; GBP 125,000 - 150,000; Full time

Job summary

A technology company in the UK is seeking a Senior Software Engineer specializing in AI to design scalable backend systems. The ideal candidate will have over 3 years of experience in backend software development using languages such as C#, Java, or Python, and must be comfortable working with distributed systems in cloud environments. Join our team to help drive innovation in backend technology and AI integration.

Qualifications

• 3+ years of professional experience in backend software development.
• Proven experience with distributed systems at scale in cloud environments.
• Exposure to data or ML workflows for model deployment.

Responsibilities

• Design and develop scalable backend systems and APIs.
• Build and maintain data pipelines for ML model training.
• Integrate models into production services for high availability.

Skills

Backend software development

C#

Java

Python

Distributed systems design

APIs and microservices

Performance tuning

Collaboration with data teams

Education

Bachelor’s Degree in Computer Science

Job description

At DraftKings, AI is becoming an integral part of both our present and future, powering how work gets done today, guiding smarter decisions, and sparking bold ideas. It’s transforming how we enhance customer experiences, streamline operations, and unlock new possibilities. Our teams are energized by innovation and readily embrace emerging technology. We’re not waiting for the future to arrive. We’re shaping it, one bold step at a time. To those who see AI as a driver of progress, come build the future together.

The Crown Is Yours

As a Senior Software Engineer, AI, you’ll design and scale backend systems that power intelligent, data-driven experiences for millions of users. You’ll own critical services end-to-end, from rapid iteration to long-term reliability, while helping bring modern AI capabilities into production. You’ll collaborate across disciplines to turn data and machine learning, and / or Gen AI insights into scalable, real-time systems that enhance product experiences. This is a role for engineers who thrive on impact, embrace technical depth, and are energized by what’s next in backend and AI-driven technology.

What You’ll Do as a Senior Software Engineer

• Design and develop scalable backend systems and APIs that deliver intelligent, real-time functionality across a high-volume, always-on platform
• Build and maintain data pipelines and backend infrastructure that enable ML model training, evaluation, and deployment
• Partner with data scientists and ML engineers to integrate models into production services, ensuring high availability and performance
• Implement monitoring, experimentation, and evaluation frameworks to measure model and system behavior and continuously improve performance
• Work closely with product teams to translate AI capabilities into user-facing features that are reliable, fast, and maintainable
• Stay current with AI infrastructure trends, from model serving to vector databases and observability tools, and bring practical innovation to production systems
• Deliver clean, testable, production-ready code from day one while continuously optimizing for scalability and resilience
• Lead by example: mentor teammates, elevate engineering standards, and drive best practices in design and delivery

What You’ll Bring

• 3+ years of professional experience in backend software development using languages like C#, Java, or Python
• Proven experience designing, building, and operating distributed systems at scale in AWS, GCP, or other cloud environments
• Exposure to data or ML workflows, from building data pipelines to deploying or integrating ML models in production environments
• Solid understanding of APIs, microservices, and event-driven architecture
• Strong focus on testing, observability, and performance tuning for large-scale backend systems
• Comfort collaborating with data science or analytics teams to translate insights into engineering outcomes
• Ability to thrive in high ownership, fast-paced environments, balancing rapid iteration with long-term maintainability
• Curiosity, adaptability, and a drive to stay ahead in emerging technologies in AI, data systems, and backend architecture
• Bachelor’s Degree in Computer Science or equivalent combination of education and experience

Join Our Team

We’re a publicly traded (NASDAQ : DKNG) technology company headquartered in Boston. As a regulated gaming company, you may be required to obtain a gaming license issued by the appropriate state agency as a condition of employment. Don’t worry, we’ll guide you through the process if this is relevant to your role.