Senior Software Engineer - NWX Networx

Salary: £13,000 - 49,000 per year

Requirements:

• 5–7 years of professional software development experience, including delivery of complex, multi-system solutions and highly scalable, internet-facing applications serving millions of users
• Strong proficiency in .NET Core, C#/VB.NET, ASP.NET Core Web APIs, REST, application architecture, and distributed systems
• Strong proficiency in ASP.NET MVC, including performance optimization and component architecture, or working knowledge with a backend specialization
• Strong knowledge of SQL, NoSQL, Cosmos DB, and data architecture decisions
• Experience using AI-assisted engineering tools such as Cursor, Copilot, Devin, or Claude Code critically and responsibly across design, development, testing, and debugging
• Advanced experience implementing and tuning observability tools such as Datadog, Application Insights, or Amazon CloudWatch, including performance and cost optimization
• Experience with infrastructure as code using Terraform, Bicep, ARM templates, AWS CloudFormation, or CDK
• Ability to design CI/CD architectures, establish deployment strategies, and optimize pipeline performance
• Strong proficiency with SaaS cloud architecture on Azure or AWS, including services such as Azure Functions, Queue, Blob Storage, and VMs, or AWS Lambda, SQS/SNS, and EC2
• Strong containerization experience, such as Docker, or Kubernetes experience with production-scale deployments using AKS or EKS
• Expertise in clean architecture, SOLID design patterns, and domain-driven design
• Experience establishing TDD/BDD practices, team testing strategies, quality governance, and comprehensive automated testing
• Experience profiling and benchmarking applications, developing scalable solutions, and handling internet-facing traffic
• Confidence in vulnerability management, threat modeling, and tracking
• Knowledge of observability, production support, debugging complex issues, performance optimization, and production troubleshooting
• Demonstrated technical leadership through architecture decisions, mentoring, cross-team collaboration, and initiatives spanning multiple sprints or quarters
• Track record of establishing standards, driving technical excellence, and influencing technology choices
• Strong analysis and problem-solving skills, excellent verbal and written communication, and the ability to explain technical concepts to non-technical stakeholders
• Ability to lead and influence without formal authority, coach others, collaborate across Engineering and QA, resolve technical disagreements, and adapt to industry trends
• Desirable: experience in regulated or complex domains such as finance, health, or govtech, including audit requirements
• Desirable: prompt engineering, efficient token usage, AI interaction optimization, and practical use of the Model Context Protocol (MCP)
• Desirable: advanced Datadog monitoring and APM, including custom dashboards and alerting
• Desirable: modern UI architecture such as micro-frontends and SSR/SSG; security and compliance practices such as OAuth2, OIDC, and RBAC; event-driven architectures; GraphQL APIs; SignalR or WebSockets; DevOps automation; and advanced Azure or AWS certifications

Responsibilities:

• Design and deliver complex, scalable systems, including multi-service integrations, high-traffic APIs, and data-processing pipelines, accounting for edge cases, scalability, and maintainability
• Own large features or components through their full lifecycle, from conception to production support
• Lead technical discussions, influence architecture decisions, make component-level technical choices, and escalate cross-team impacts to the Engineering Lead
• Establish architectural patterns, standards, and best practices, and ensure documentation and knowledge transfer for owned systems
• Lead story refinement with Product Owners, contributing technical expertise to estimation and risk assessment
• Partner with product, design, and QA teams to deliver solutions that meet business objectives
• Influence technology choices using technical expertise and business context
• Facilitate Agile ceremonies, improve team processes, and establish practices that support predictable delivery
• Identify technical debt and system improvements, and inspire their resolution
• Champion TDD/BDD, automated testing, shift-left testing, and team quality practices
• Lead security implementation for complex features, establish security practices, and conduct comprehensive security reviews
• Establish development tooling, documentation standards, and knowledge-transfer practices across team systems and deliverables
• Lead troubleshooting of complex software issues and production incidents
• Mentor junior and mid-level engineers to strengthen team capability and technical standards
• Establish team code-review standards, conduct complex feature reviews, and drive quality improvements
• Champion continuous improvement and responsible AI adoption through team governance practices

Technologies:

• AI
• ARM
• ASP.NET
• AWS
• Lambda
• Azure
• Backend
• C#
• CI/CD
• Claude Code
• Cloud
• CloudWatch
• Copilot
• Cosmos DB
• Cursor
• Datadog
• DevOps
• Docker
• EC2
• GraphQL
• Support
• Kubernetes
• MCP
• MVC
• NoSQL
• REST
• RBAC
• SQL
• Security
• SignalR
• TDD
• Terraform
• Web
• UX UI Design
• Frontend

More:

We are IRIS Software Group, one of the UKs largest privately held software companies. Our software supports more than 100,000 businesses, schools, and accountancy firms; pays one in six UK employees; supports over 12,000 schools; and is relied on by 91 of the UKs top 100 accountancy firms. We are a Great Place to Work-certified employer recognized for our commitment to well-being, inclusion, and development, and we are growing quickly. This full-time Senior Software Engineer role is remote in the UK, within our IRIS department. You will join a team undertaking a major technology transformation, evolving a market-leading Applicant Tracking System from a legacy monolithic platform into a modern, cloud-native Azure application. The role offers the opportunity to shape architecture and product direction for a system used by thousands of customers, with work influencing millions of users globally. We offer continuous learning and career development opportunities and a culture that celebrates diversity and empowers individuals. Our hiring process typically includes an application review, an initial call, a role-tailored skills assessment, and a final interview; stages may vary by role. We explain the specific process at the outset and provide adjustments or accommodations to support accessibility.

last updated 40 week of 2026