Senior Full-Stack .Net Engineer

Sainsbury's; England; Hybrid; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Colleague discount across Sainsbury's,

Bonus scheme

Pension plan

Flexible / smarter working policy

Discounts at gyms, restaurants, and更多

Private healthcare

Life cover

Cycle to work

Other retailer discounts

Job summary

Sainsbury's is seeking a Senior Full stack .NET Engineer to design, build and deliver high-performing technology that improves customer experience, drives efficiency and reduces costs. You will mentor others, shape technical direction and lead engineering excellence across the team.

You’ll work across the full stack, including React.js on the frontend and scalable backend services, with AWS/GCP, Docker/Kubernetes, and DevSecOps practices at the core of delivery.

Qualifications

• Strong experience in .NET development and associated engineering principles.
• Proficiency with relational and non-relational databases (SQL, MongoDB).
• Experience with cloud platforms (AWS and/or Google Cloud).
• Knowledge of React.js/Typescript and modern frontend standards.
• Experience with Docker, Kubernetes, and container orchestration.
• Understanding of serverless functions and event-driven architecture.
• Solid understanding of software design, security principles, and DevSecOps practices.
• Hands-on experience with CI/CD pipelines and infrastructure-as-code.
• Curiosity for emerging technologies and a commitment to continuous learning.
• Excellent problem-solving, communication, and mentoring skills.
• Empathy and the ability to support, coach, and empower colleagues.
• Self-driven with a desire to improve processes, teams, and engineering practices.

Responsibilities

• Design and build large-scale, high-performance services using the latest technologies and standards.
• Work with React.js, SQL, MongoDB, Kubernetes, Docker, serverless and event-driven architecture.
• Implement and enhance cloud-based solutions across AWS and Google Cloud Platform.
• Lead the technical roadmap and long-term architecture strategy.
• Share knowledge, contribute to best practices and enable continuous improvement.
• Lead design and support of internal frameworks across Sainsbury's Group.
• Engineer across the full product lifecycle from inception to decommissioning.
• Consider cost, scalability, and operational support in decision-making.

Skills

.NET development

React.js/Typescript

Mentoring

Agile delivery

Cloud mindset

Tools

Docker

Kubernetes

AWS / GCP

SQL

MongoDB

Serverless

CI/CD / IaC

Terraform

Job description

About the Role

We're looking for a talented Senior Full stack .NET Engineer to help design, build and deliver high-performing technology that improves customer experience, drives business efficiency and reduces operating costs.

You will help shape technical direction and mentor others whilst championing engineering excellence and be a valued contributor to our broader engineering community.

You'll bring curiosity, analytical thinking and a willingness to challenge how things are done - always looking for ways to improve engineering practices within your team.

What You'll Do

• Design and build large-scale, high-performance services using the latest technologies and engineering standards.
• Work with technologies such as React.js, SQL, MongoDB, Kubernetes, Docker, serverless functions and event-driven architecture.
• Implement and enhance cloud-based solutions across AWS and Google Cloud Platform.
• Help lead the technical roadmap, shaping the long-term architecture and engineering strategy.
• Share knowledge, contribute to best practices and enable continuous improvement within the engineering community.
• Lead the design and support of internal frameworks that enhance engineering capabilities across the Sainsbury's Group.
• Engineer across the entire product lifecycle-from inception through to decommissioning.
• Consider cost, scalability, and operational support implications in your technical decision-making.

Who You Are

You're a proactive, driven engineer who is passionate about modern engineering practices, cloud technology and delivering high-quality solutions. You promote agile ways of working and enjoy solving complex problems in a collaborative environment.

Essential Criteria

• Strong experience in .NET development and associated engineering principles.
• Proficiency with relational and non-relational databases (e.g., SQL, MongoDB).
• Experience working with cloud platforms (AWS and/or Google Cloud Platform).
• Knowledge of React.js/Typescript and modern frontend development standards.
• Experience with Docker, Kubernetes, and container orchestration.
• Understanding of serverless functions and event-driven architecture.
• Solid understanding of software design, security principles, and DevSecOps practices.
• Hands-on experience with CI/CD pipelines and infrastructure-as-code.
• Curiosity for emerging technologies and a commitment to continuous learning.
• Excellent problem-solving, communication, and mentoring skills.
• Empathy and the ability to support, coach, and empower colleagues to deliver their best.
• Self-driven with a desire to improve processes, teams, and engineering practices.

Ways of Working

• Strong advocate for agile/lean delivery methodologies.
• Ability to collaborate effectively across multidisciplinary teams.
• Self-driven mindset with a passion for continuous learning and innovation.

What's in It for You

• Colleague discount across Sainsbury's, Argos and Habitat
• Competitive holiday allowance
• Bonus scheme
• Pension plan
• Flexible / smarter working policy
• Access to a wide range of discounts (gyms, restaurants, retail and more)

We are committed to being a truly inclusive retailer, so you'll be welcomed whoever you are and wherever you work. Around here, there's always the chance to try something new - whether that's 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, we'll 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 Sainsbury's 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 20% 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, interest free car loan of up to £10k, 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, you will also be eligible for private healthcare too.

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 for a range of our benefits (note, length of service and eligibility criteria may apply).