Externally this job title might also be known as Senior .Net Engineer, Senior .Net Software Engineer, Senior .Net Developer or Senior .Net Software Developer

At NewDay, we're building the next generation of financial technology platforms that power millions of customer interactions every day.

As a Senior .NET Engineer , you'll play a key role in a dynamic team that is dedicated to delivering ground breaking solutions.

Here, you have the opportunity to work in a collaborative, inclusive environment that values your expertise and encourages continuous innovation. Join us on this journey to compete at the highest level and successfully implement modern technologies!

What you'll be doing

• Design, build and evolve platform capabilities used by engineering teams across NewDay.
• Take ownership of complex technical problems, from solution design through to production delivery.
• Write high-quality, maintainable code and champion engineering best practice through code reviews, pairing and mentoring.
• Partner with architects, product teams and fellow engineers to shape scalable, resilient solutions.
• Drive improvements in software quality, operational excellence and developer experience.
• Build and enhance Continuous Delivery pipelines to enable safe, frequent and reliable deployments.
• Contribute to technical discussions and architectural decisions across the wider engineering community.
• Leverage AI tools such as GitHub Copilot thoughtfully to improve developer productivity and code quality.

Key Skills & Responsibilities

• Strong proficiency in crafting modern .NET applications using C# 12+ (including .NET 8+ and NuGet).
• Experience designing and working with microservices and event-driven architectures
• Expertise in crafting robust HTTP APIs with tools such as ASP.NET MVC, Web API, Carter, or Nancy.
• Experience navigating Platform-as-a-Service (PaaS) cloud environments.
• Proven experience with Event-Driven Architecture, designing systems that react in real-time.
• Experience with DevOps practices, including building and maintaining CI/CD pipelines (e.g. GitHub Actions, Octopus)
• Knowledge of Event-Sourced Systems, building architectures that track every state change.
• Ability to thrive in autonomous, agile environments where daily innovation is the norm.

Experience that will help you stand out

• Proven experience with Event-Driven Architecture, designing systems that react in real-time.
• Knowledge of Event-Sourced Systems, building architectures that track every state change.
• Experience working with distributed, scalable database solutions.
• Familiarity with Event Sourced architectures.

The impact you'll have

This role offers the opportunity to shape technology that underpins critical business capabilities across NewDay. You'll influence how we build software, improve engineering effectiveness, and help create the platforms that enable our teams to deliver exceptional customer experiences at scale.

If you're a senior engineer who enjoys solving complex problems, driving technical excellence, and building modern cloud-native systems, we'd love to hear from you.

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At NewDay, we value all types of diversity. We're an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don't discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.

Tell us if you need accommodations: We'll put reasonable adjustments in place to support you.

We work with Textio to make our job design and hiring inclusive.

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