Software Development Engineer II - Personalistion

United States Digital Space LLC; United States; Hybrid; USD 130,000 - 190,000; Full time

Benefits offered by this job

Annual bonus up to 20% of base salary

25 days holiday + personal day

Private medical insurance

26 weeks maternity/adoption leave + p3

24/7 virtual GP and EAP

Job summary

United States Digital Space LLC is seeking a backend engineer to help build real-time personalization across web, mobile, and in-store channels. You’ll design low-latency services, integrate ML models, and collaborate with data science and analytics teams to turn customer insights into fast decisions.

The role focuses on Java/Spring Boot microservices, event-driven architectures, and scalable streaming pipelines using Flink/Beam with Kafka.

Qualifications

• Strong Java backend experience.
• Experience building microservices and APIs.
• Understanding of event-driven systems.
• Familiarity with stream processing concepts.
• Knowledge of distributed systems.
• Strong communication and teamwork skills.
• Interest in data-driven personalisation systems.
• Experience with Apache Flink and Apache Beam.
• Experience with Kafka.
• Familiarity with Apache Camel.
• Experience with NoSQL databases (Cassandra, DynamoDB) and Redis.
• Cloud experience (GCP or AWS).
• Docker and Kubernetes.
• ML model serving or feature stores.
• A/B testing platforms.
• Terraform or infrastructure as code.
• Performance and scalability optimisation.

Responsibilities

• Build low-latency, high-throughput services for personalisation.
• Develop Java / Spring Boot microservices with REST/gRPC APIs.
• Work with Kafka and event-driven architectures.
• Build pipelines using Apache Flink and Apache Beam.
• Integrate ML models and feature stores.
• Work with NoSQL databases and Redis caching.
• Use Apache Camel for integration where required.
• Collaborate with product, data science, and analytics teams.
• Write automated tests and improve reliability.
• Monitor systems using New Relic, Splunk, and metrics platforms.
• Support CI/CD pipelines and deployments.
• Contribute to experimentation (A/B testing).

Skills

Java backend

Microservices

Event-driven

Stream processing

Distributed systems

Communication

Personalisation interest

Flink

Kafka

Camel

NoSQL/Redis

Cloud AWS/GCP

Docker/Kubernetes

ML serving

A/B testing

Terraform/IaC

Performance tuning

Tools

NoSQL databases (Cassandra, DynamoDB)

Redis

Job description

About the role

Every customer is different, and we're building the technology to make every the company experience feel personal. Join the company's Personalisation team and help shape the experiences of millions of customers every day by powering real-time recommendations, offers, targeting, and experimentation across our web, mobile, and in-store channels. Our platforms combine real-time data, machine learning, and large-scale distributed systems to turn customer insights into intelligent decisions in milliseconds. You'll work on complex engineering challenges spanning streaming data, low-latency decisioning services, and ML powered systems, while collaborating closely with product, data science, and analytics teams. This is an opportunity to build technology at significant scale, influence the evolution of our personalisation platform, and directly impact how millions of customers discover, shop, and save with the company.

You will be responsible for

• Building low-latency, high-throughput services for personalisation
• Developing Java / Spring Boot microservices with REST/gRPC APIs
• Working with Kafka and event-driven architectures
• Building pipelines using Apache Flink and Apache Beam
• Integrating ML models and feature stores
• Working with NoSQL databases and Redis caching
• Using Apache Camel for integration where required
• Collaborating with product, data science, and analytics teams
• Writing automated tests and improving reliability
• Monitoring systems using New Relic, Splunk, and metrics platforms
• Supporting CI/CD pipelines and deployments
• Contributing to experimentation (A/B testing)

You will need

• Strong Java backend experience
• Experience building microservices and APIs
• Understanding of event-driven systems
• Familiarity with stream processing concepts
• Knowledge of distributed systems
• Strong communication and teamwork skills
• Interest in data-driven personalisation systems
• Nice to have
• Experience with Apache Flink and Apache Beam
• Experience with Kafka
• Familiarity with Apache Camel
• Experience with NoSQL databases (Cassandra, DynamoDB) and Redis
• Cloud experience (GCP or AWS)
• Docker and Kubernetes
• ML model serving or feature stores
• A/B testing platforms
• Terraform or infrastructure as code
• Performance and scalability optimisation

Whats in it for you?

We’re all about the little helps. That’s why we make sure our the company colleague benefits package takes care of you – both in and out of work. Click Here to find out more!

• Annual bonus scheme of up to 20% of base salary.
• Holiday starting at 25 days plus a personal day (plus Bank holidays).
• Private medical insurance.
• 26 weeks maternity and adoption leave (12 months service required at the *qualifying* date) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 weeks fully paid paternity leave.
• Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing.

*The above information is a shortened summary, refer to our policies for full details*

About Us

You might know us as a supermarket, technology company or even for our award-winning mobile network. Truth is, we’re all of those things, and much more. Our colleagues work with one goal in mind, helping to make every day a little better for our customers, colleagues and communities all over the world. No two customers are the same, neither are our colleagues.

At the company, we champion a balance that lets you thrive both in and out of work. Spend 60% of your week collaborating with colleagues at our office locations or local sites and the rest remotely. Whether you're just kicking off your career, juggling passions, or navigating big life events, we're here to support you. We always welcome a conversation about flexible working, so talk to us throughout your application about how we can support.

We're proud to be an accredited Disability Confident Leader, where everyone’s welcome. That’s why we commit to providing a fully inclusive and accessible recruitment process. If you need support with your application, click here for more information. And if you're interested in joining our team but don't tick every box, don't let that hold you back from applying.