Node.js/TypeScript Backend Engineer

{ “@context”: “http://schema.org”, “@type”: “JobPosting”, “title”: “Node.js/TypeScript Backend Engineer”, “description”: “Wed all like amazing work to do, and real work-life balance. Thats waiting for you at Sainsburys. Think about the scale it takes to feed the nation. The level of data, transactions and variety involved. Then youll realise this is a modern software engineering environment, because it has to be. Weve made significant investment in the standards and principles that shape how we work. We iterate, learn, experiment and champion ways of working such as Agile, Scrum and XP. So you can look forward to exciting opportunities across everything from AI to reusable tech.Were a multi-channel, multi-brand business serving millions of customers a day, with the UKs 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 dont think were exaggerating when we say we have one of the most exciting engineering environments in the country. In an inclusive, agile environment, youll have the space to be curious, to experiment, and to solve real-world challenges. And youll get to see your work powering applications used by millions of people across the UK.About the TeamYoull 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 Sainsburys 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 RoleAs 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 RoleDefine technical solutions aligned with MMH team standards and Sainsburys engineering principlesDesign, build, test, and deploy services and enhancementsEnsure compliance with quality standards and successful production deploymentRefine epics and technical user stories, translating them into clear and structured Jira ticketsLiaise with stakeholders to clarify requirements and ensure shared understandingCommunicate technical solutions clearly to engineers and non-technical stakeholdersContribute to microservices-based architectures supporting large-scale datasetsIntegrate systems with APIs, event-driven platforms, and third-party servicesWays of WorkingStrong communication skills, engaging effectively with technical and non-technical stakeholdersCollaborative mindset, working closely with cross-functional teamsComfortable working within SCRUM Agile methodologies and adapting to team practicesDemonstrates empathy and supports team members to deliver effectivelyAbout YouStrong understanding of engineering principles and architectural best practicesComfortable owning and refining ambiguous problem spaces into structured engineering workAble to engage stakeholders, clarify requirements, and translate them into actionable tasksConfident explaining technical concepts to a range of audiencesPassionate about building scalable, high-quality solutionsSupports team delivery through collaboration, communication, and shared ownershipEssential CriteriaTechnical ExpertiseProficiency in JavaScript, TypeScript, and Node.jsExperience working with microservices architectureExperience handling large-scale datasets (millions of rows)Strong knowledge of REST, JSON, and SOAP APIsExperience writing unit, integration, and end-to-end testsHands-on experience with CI/CD pipelines (GitHub Actions)Experience using Git and GitHubCloud & Platform TechnologiesFamiliarity with KubernetesExperience with AWS Serverless services and S3Infrastructure as Code using TerraformData & StreamingExperience with SnowflakeExperience working with KafkaObservability & MonitoringKnowledge of tools such as NewRelic or GrafanaDesirable criteria:Familiarity with Salesforce Marketing Cloud and its APIsFamiliarity with Coding Agent and AI-driven development best practicesLocation and Working PatternLondon-based roleFlexible working approach combining remote and in-office collaborationBenefits and RewardsAs well as lots of on-the-job training and development opportunities, youll get:Colleague discount across Sainsburys, Argos and Habitat10% side project / personal development timeGenerous holiday allowance, with holiday buying schemeBonus scheme up to 10% of base salaryPension planAccess to discounts on gym memberships, restaurants, holidays and moreWork-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. Youll be supported, developed, and encouraged to grow your career, with opportunities across teams and the wider business.We are committed to being a truly inclusive retailer, so youll be welcomed whoever you are and wherever you work. Around here, theres always the chance to try something new-whether thats as part of an evolving team or somewhere else across the business – and we take development seriously and promise to support you. We also recognise and celebrate colleagues when they go the extra mile and, where possible, offer flexible working. When you join our team, well also offer you an amazing range of benefits. Here are some of them:Starting off with colleague discount, you'll be able to get 10% off at Sainsbury's, Argos, TU and Habitat after 4 weeks. This increases to 15% off at Sainsburys every Friday and Saturday and 15% off at Argos every pay day. We've also got you covered for your future with our pensions scheme and life cover. You'll also be able to share in our success as you may be eligible for a performance-related bonus of up to 10% of salary, depending on how we perform.Your wellbeing is important to us too. You'll receive an annual holiday allowance, and you can buy additional holiday. We also offer other benefits that will help your money go further such as season ticket loans, cycle to work scheme, health cash plans, pay advance (where you can access some of your pay before pay day) as well access to a great range of discounts from hundreds of other retailers. And if you ever need it there is also an employee assistance programme.Moments that matter are as important to us as they are to you which is why we give up to 26 weeks pay for maternity or adoption leave and up to 4 weeks pay for paternity leave.Please see www.sainsburys.jobs for a range of our benefits (note, length of service and eligibility criteria may apply).”, “datePosted”: “2026-05-11”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Sainsbury's”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__428928971__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=4” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “London” } } }