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- Tasks: Design and implement server-side logic in a dynamic, agile environment.
- Company: Join Sainsbury’s, a leading multi-channel business with a vibrant culture.
- Benefits: Enjoy discounts, flexible working, generous holidays, and a bonus scheme.
- Other info: Collaborative team environment with excellent career growth opportunities.
- Why this job: Make an impact on millions while working with cutting-edge technologies.
- Qualifications: Proficient in JavaScript, TypeScript, and Node.js; experience with microservices.
The predicted salary is between 55000 - 65000 £ per year.
We’re a multi-channel, multi-brand business serving millions of customers a day, with the UK’s largest loyalty scheme and an ever-evolving set of digital platforms. All of this equals over 1.2 billion transactions each year, presenting a volume, depth and complexity of data that few can match. We don’t think we’re exaggerating when we say we have one of the most exciting engineering environments in the country. In an inclusive, agile environment, you’ll have the space to be curious, to experiment, and to solve real-world challenges. And you’ll get to see your work powering applications used by millions of people across the UK.
About the Team: You’ll be part of the Martech engineering domain, an independent and empowered engineering initiative created to address the rapid growth and complexity within the Customer & Data division. Martech brings together key products from Customer Decisioning (focused on customer data) and Customer Loyalty (supporting the Nectar brand), with a mission to build cross-channel and cross-brand marketing tools that enable data-driven, world-class customer experiences at scale. Within Martech, you will work in the MMH (Multichannel Messaging Hub) team. MMH orchestrates campaign delivery across email, push notifications, and personalised content, supporting all brands within the Sainsbury’s Group. The team consists of 7 engineers, a Product Manager, and an Engineering Manager, working collaboratively in an Agile (SCRUM) environment with a strong focus on communication, shared understanding, and continuous improvement.
About the Role: As a Node.js/TypeScript Engineer, you will design and implement server-side logic within a microservices architecture, contributing to the delivery of scalable, high-performance services. You will work closely with cross-functional stakeholders to define and refine solutions, taking ownership of shaping epics and breaking them down into actionable engineering work. This includes refining technical user stories, explaining requirements to the team, and ensuring alignment across stakeholders. The role involves building and integrating services that support large-scale, data-intensive applications, interacting with APIs, event-driven systems, and external platforms.
More about the Role:
- Define technical solutions aligned with MMH team standards and Sainsbury’s engineering principles
- Design, build, test, and deploy services and enhancements
- Ensure compliance with quality standards and successful production deployment
- Refine epics and technical user stories, translating them into clear and structured Jira tickets
- Liaise with stakeholders to clarify requirements and ensure shared understanding
- Communicate technical solutions clearly to engineers and non-technical stakeholders
- Contribute to microservices-based architectures supporting large-scale datasets
- Integrate systems with APIs, event-driven platforms, and third-party services
Ways of Working:
- Strong communication skills, engaging effectively with technical and non-technical stakeholders
- Collaborative mindset, working closely with cross-functional teams
- Comfortable working within SCRUM Agile methodologies and adapting to team practices
- Demonstrates empathy and supports team members to deliver effectively
About You:
- Strong understanding of engineering principles and architectural best practices
- Comfortable owning and refining ambiguous problem spaces into structured engineering work
- Able to engage stakeholders, clarify requirements, and translate them into actionable tasks
- Confident explaining technical concepts to a range of audiences
- Passionate about building scalable, high-quality solutions
- Supports team delivery through collaboration, communication, and shared ownership
Essential Criteria:
Technical Expertise:- Proficiency in JavaScript, TypeScript, and Node.js
- Experience working with microservices architecture
- Experience handling large-scale datasets (millions of rows)
- Strong knowledge of REST, JSON, and SOAP APIs
- Experience writing unit, integration, and end-to-end tests
- Hands-on experience with CI/CD pipelines (GitHub Actions)
- Experience using Git and GitHub
- Familiarity with Kubernetes
- Experience with AWS Serverless services and S3
- Infrastructure as Code using Terraform
- Experience with Snowflake
- Experience working with Kafka
- Knowledge of tools such as NewRelic or Grafana
Desirable criteria:
- Familiarity with Salesforce Marketing Cloud and its APIs
- Familiarity with Coding Agent and AI-driven development best practices
Location and Working Pattern: London-based role with a flexible working approach combining remote and in-office collaboration.
Benefits and Rewards: As well as lots of on-the-job training and development opportunities, you’ll get:
- Colleague discount across Sainsbury’s, Argos and Habitat
- 10% side project / personal development time
- Generous holiday allowance, with holiday buying scheme
- Bonus scheme – up to 10% of base salary
- Pension plan
- Access to discounts on gym memberships, restaurants, holidays and more
Work-life balance is important to us, so we offer flexibility in how, where and when you work, combining remote and collaborative working. We are committed to being a truly inclusive retailer. You’ll be supported, developed, and encouraged to grow your career, with opportunities across teams and the wider business.
Node.js/TypeScript Backend Engineer in London employer: Sainsbury's
Contact Detail:
Sainsbury's Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Node.js/TypeScript Backend Engineer in London
✨Tip Number 1
Network like a pro! Reach out to current employees on LinkedIn or at industry events. Ask them about their experiences and any tips they might have for landing a role at Sainsbury’s.
✨Tip Number 2
Prepare for the technical interview by brushing up on your Node.js and TypeScript skills. Practice coding challenges and be ready to discuss your past projects, especially those involving microservices and large datasets.
✨Tip Number 3
Show your passion for the role! During interviews, share your enthusiasm for building scalable solutions and how you can contribute to the MMH team’s mission of enhancing customer experiences.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team.
We think you need these skills to ace Node.js/TypeScript Backend Engineer in London
Some tips for your application 🫡
Tailor Your Application: Make sure to customise your CV and cover letter for the Node.js/TypeScript Engineer role. Highlight your experience with microservices, APIs, and any relevant projects that showcase your skills. We want to see how you fit into our exciting engineering environment!
Showcase Your Technical Skills: Don’t hold back on your technical expertise! Mention your proficiency in JavaScript, TypeScript, and Node.js, as well as your experience with CI/CD pipelines and cloud technologies. We love seeing candidates who can clearly demonstrate their technical know-how.
Communicate Clearly: When writing your application, keep it clear and concise. Use straightforward language to explain your experiences and how they relate to the role. Remember, we’re looking for strong communication skills, so let that shine through in your writing!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way to ensure your application gets to us quickly and efficiently. Plus, you’ll find all the details about the role and our amazing benefits there!
How to prepare for a job interview at Sainsbury's
✨Know Your Tech Stack
Make sure you brush up on your JavaScript, TypeScript, and Node.js skills. Be ready to discuss your experience with microservices architecture and handling large-scale datasets. They’ll likely ask you to explain how you've used these technologies in past projects.
✨Understand the Business
Familiarise yourself with the company’s loyalty scheme and digital platforms. Knowing how your role as a Backend Engineer fits into their mission will show that you're genuinely interested and can contribute to their goals.
✨Prepare for Agile Discussions
Since they work in an Agile environment, be prepared to talk about your experience with SCRUM methodologies. Think of examples where you’ve collaborated with cross-functional teams and how you’ve adapted to changing requirements.
✨Communicate Clearly
Practice explaining technical concepts in simple terms. You might need to communicate with non-technical stakeholders, so being able to break down complex ideas will demonstrate your strong communication skills and empathy towards team members.