Senior Developer - Doncaster

hackajob is collaborating with Next Ltd to connect them with exceptional professionals for this role.

We are hiring a Senior Developer to join our teams in the Doncaster hub. You will be placed at the heart of the customer journey, managing the secure, high-volume systems that power Payments, Delivery, and Customer Registration for one of the largest online retail platforms in the UK. Your code will directly handle millions of transactions, supporting over 10 million active customers across more than 150 international sites.
You will join our Checkout Delivery team, focusing on the crucial step of delivery selection, working with external services to provide accurate options and expectations for our global customer base. Solving complex logistical problems by orchestrating real-time delivery logic, working with external services to provide accurate and globally scalable options across 70+ international markets.

What You'll Take On:

You will be a key player in our multi-year strategic programme to refactor core monolith functionality into modern, cloud-native services. This role is not just maintenance; it is platform engineering at retail scale, requiring an active contribution to technical design, architecture review, and the implementation of resilient, highly-available systems in Azure.
You will work on highly visible features as part of cross-functional projects. This involves engaging with complex, mixed codebases - from legacy monoliths to modern, cloud-based architectures. This role requires pace, technical expertise, and a can-do attitude to meet hard deadlines and deliver high-impact, performant features.

Key Responsibilities:

• Software Delivery: Write, test, and deploy high-quality code from concept through to delivery and beyond.
• Problem Solving: Apply imaginative solutions to complex problems in a demanding, fast-paced retail environment.
• Collaboration: Work effectively with Product Owners and necessary departments across the business.
• Support: Provide development support to internal users and offer out-of-hours cover on a rota basis.
• Improvement: Continually feedback your expertise and experience to help drive internal best practices.

You’ll be doing all this from our office in Doncaster. A fast-paced, encouraging and supportive environment in which everyone brings an energy and a commitment to delivering for our customers and their own careers.
Our Product-led teams operate with a high degree of autonomy. Developers own the full lifecycle of their features, from technical design and code review to automated deployment and production monitoring (DevOps culture). You will be empowered to drive the technical direction of your specific product area.
What You'll Bring:

Required Technical Stack

• Proficient in Microsoft-based technologies such as ASP.NET MVC, WCF Services, Web API and Azure.
• Experience in SQL Server.
• Familiar with TypeScript and common JavaScript frameworks such as React.
• Knowledge of other modern concepts and practices, including Observability, automation, and DevOps.
• A strong commitment to quality: you defensively code, inject dependencies, and understand the vital importance of unit testing.

Cultural and Leadership Fit

• A confident team player who brings energy, embraces a challenge, and contributes actively to team success.
• Strong, structured communication skills to present technical information clearly to peers and stakeholders.
• A commitment to driving pace and quality, demonstrating the "can-do" attitude required to meet hard deadlines.
• Mentoring skills to actively support the growth and development of junior team members.
• Technical Direction: Help direct the team’s technical approach, ensuring quality and alignment with the wider company strategy.
  

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