Web Developer (mid level) (ID: wdS3FrHP)

We’re looking for a skilled Web Developer to join a fast-growing, forward-thinking financial services business that builds and maintains its own proprietary systems — from internal back-office solutions to client-facing applications.

This is an excellent opportunity for a developer who enjoys owning features end-to-end, working across modern and legacy technology stacks, and contributing to meaningful business transformation projects.

You’ll be involved in the full development lifecycle — requirements, design, coding, testing, deployment, documentation, and support — with a strong emphasis on scalability, maintainability, and continuous improvement. You’ll work directly with our CTO and collaborate closely with teams across operations, compliance, and administration to deliver high-impact solutions.

Essential Skills

• C# / .NET (6+): Dependency Injection, Web API
• Experience with .NET Framework 4.x / WebForms
• SQL Server / T-SQL: Query optimisation, indexing, performance tuning
• TypeScript / React: Component reusability, state management
• Auth & Security: OAuth2 / OIDC for securing SPA and APIs
• Azure (hands-on): App Service, Functions, Logic Apps, SQL, Storage, Key Vault, App Configuration, Application Insights, networking fundamentals
• CI/CD: GitHub Actions / Azure DevOps, configuration and secret management

Desirable Skills

• Firebase (authentication, hosting, Firestore)
• React Native (mobile app development)
• Exposure to Azure AI Foundry or AI orchestration tools
• Experience migrating legacy systems to modern architectures
• Entra ID (OAuth2) and secure Azure networking / VNET setup
• Twilio API integration
• Industry experience in financial services, particularly retirement or custodial platforms
• Familiarity with the Seccl API

Web Developer Key Responsibilities

Development

• Enhance and extend our proprietary CRM using T-SQL, C#, and BPM/workflow tools
• Incrementally modernise legacy WebForms applications using the strangler pattern
• Develop and maintain client-facing applications (React/TypeScript with .NET 9 Web API)
• Support Azure cloud infrastructure (App Service, Functions, Azure SQL, Storage, Key Vault, App Configuration, Private Endpoints, Application Insights)
• Contribute to CI/CD pipelines, testing, and code quality initiatives
• Perform thorough peer reviews and testing

Data & Performance

• Write performance-conscious, SARGable SQL queries and manage indexing
• Monitor and optimise Azure SQL database performance
• Documentation & Compliance
• Produce clear technical documentation, training materials, and architecture diagrams
• Contribute to due diligence and security testing documentation (data flows, controls)

Support

• Triage and resolve support tickets related to in-house and client-facing applications
• Use Azure Application Insights and logs for troubleshooting and incident response
• Requirements Gathering
• Work with stakeholders to define clear problem statements and technical requirements
• Translate business needs into scalable, maintainable technical solutions

Team & Collaboration

• Work within a small, motivated, and high-performing team
• Partner closely with the hands-on CTO
• Maintain strong communication with business teams to deliver on-time, high-quality projects
• Working Environment
• Location: Office-based in Doncaster (occasional remote work available)
• Hours: Monday–Friday, 09:00–17:30 (flexible within reason to meet delivery goals)

Benefits

• Competitive salary (dependent on experience)
• 24 days annual leave (plus bank holidays)
• Company pension scheme
• Free on-site parking
• Company events and social activities
• Flexibility on working hours (to support project milestones)
• Opportunity to own end-to-end projects in a growing, entrepreneurial environment
• Exposure to emerging technologies, including AI

Development Path

We welcome candidates who may be stronger in some areas (e.g. WebForms, C#, SQL) but eager to upskill in others, such as React or Azure. The ideal candidate is adaptable, curious, and comfortable working across both legacy and modern stacks — sometimes in the same day.

Interested?
Apply today to join a collaborative, innovative team where your work has real impact and where you’ll have the freedom to take ownership of features from concept to delivery.

Position: Web Developer (mid level)  -  Job Type: Full-Time  -  Salary: up to £40,00 per year

Location: Office-based in Doncaster (occasional remote work available)