Web Developer – .NET, Blazor and Azure

C-SAM develops specialist asset management rental service certification and operational software for customers operating across the UK and international markets.
We are currently investing heavily in the development of our next-generation web application framework. This framework will modernise our established Windows-based software and provide a scalable secure and configurable cloud platform for both existing and new customers.
We are looking for a practical and experienced Web Developer to join our development team and help build improve and deliver this new platform.

The Web Developer will work primarily on C-SAMs newest web application framework developing reusable components customer-facing modules integrations and core platform functionality.
You will work across the full development lifecycle including requirements analysis solution design development testing deployment and ongoing improvement.
The role will also involve understanding and where required migrating functionality from our existing WinForms and SQL Server applications into the new web platform.
This is a hands-on development role suited to someone who enjoys solving real business problems working with complex workflows and building software that is reliable maintainable and easy for users to operate.

Key Responsibilities
Develop and maintain functionality within C-SAMs web application framework.
Build reusable Blazor components shared services and configurable application modules.
Develop responsive and user-friendly web interfaces.
Convert existing Windows application functionality into modern web-based workflows.
Work with product owners operational teams and customers to understand business requirements.
Design and implement secure scalable and maintainable solutions.
Develop and optimise Entity Framework queries and data access services.
Create and maintain SQL Server stored procedures views functions and scripts.
Improve application and database performance.
Build integrations with customer systems third-party APIs and cloud services.
Assist with data migration cleansing and validation activities.
Develop authentication role-based access and permission functionality.
Support multi-company multi-entity and multi-customer application structures.
Write unit tests and assist with integration regression and user acceptance testing.
Diagnose and resolve software defects and performance issues.
Review code and contribute to development standards and architecture decisions.
Produce clear technical documentation and implementation notes.
Support application deployments to Azure environments.
Work with AI-assisted development tools including OpenAI Codex to improve development speed and quality.
Contribute to the continuous improvement of the framework development processes and coding standards.
Essential Skills and Experience
Strong commercial experience developing applications using C# .
Experience developing web applications using Blazor Server Blazor WebAssembly Core or a similar Microsoft web technology.
Strong SQL Server knowledge including:
o T-SQL
o Stored procedures
o Views
o Joins and aggregations
o Query optimisation
o Indexing
o Execution plans
o Data migration scripts
Experience using Entity Framework or Entity Framework Core.
Good understanding of object-oriented programming and software design principles.
Experience developing REST APIs and integrating with third-party services.
Experience with dependency injection and service-based application architecture.
Experience using Git and source control workflows.
Good understanding of application security authentication and role-based permissions.
Ability to investigate and resolve complex technical and business problems.
Ability to work with existing applications and understand established business logic.
Strong attention to detail and a focus on producing reliable supportable software.
Ability to work independently while also contributing effectively within a small development team.

Desirable Skills and Experience
The following experience would be beneficial but is not essential:
development experience.
WinForms or WPF application development.
Experience modernising or migrating desktop applications to web technologies.
Crystal Reports development and support.
Experience converting Crystal Reports into web-based or alternative reporting solutions.
Microsoft Azure experience including:
o Azure App Service
o Azure SQL Database
o Azure Storage
o Azure Functions
o Application Insights
o Key Vault
o Azure DevOps
o Microsoft Entra ID
Experience with Microsoft Authentication Library (MSAL) single sign-on or multi-factor authentication.
Experience building multi-tenant or multi-company SaaS applications.
Experience with MAUI or cross-platform application development.
Knowledge of HTML CSS JavaScript and responsive web design.
Experience with component libraries such as Ignite UI.
Experience developing dashboards charts and operational reporting.
Knowledge of background processing scheduled services and message queues.
Experience with document generation barcode printing label printing or local printing services.
Experience integrating accounting shipping CRM ERP or asset management systems.
Experience working with AI development tools such as OpenAI Codex GitHub Copilot or Azure AI services.
Knowledge of prompt design AI agents retrieval-augmented generation or vector search.
Familiarity with secure software development practices and standards such as ISO 27001.
Experience working within rental asset management service maintenance logistics or certification-based industries.

Technical Environment
The successful candidate is likely to work with technologies including:

• C#
• .NET and Core
• Blazor Server
• Entity Framework Core
• SQL Server
• Azure SQL Database
• REST APIs
• HTML and CSS
• JavaScript
• Microsoft Azure
• Microsoft Entra ID and MSAL
• Git and Azure DevOps
• Crystal Reports
• WinForms and WPF
• .NET MAUI
• OpenAI Codex and Azure AI services

Personal Characteristics

Qualifications and Experience
A degree or equivalent qualification in software development computer science or a related subject is desirable.
Equivalent commercial experience will also be considered.
Previous experience in a commercial software development role is required.
Experience delivering business-critical software to external customers would be advantageous.

Working Arrangements
This role will involve working closely with C-SAMs development operations professional services and management teams.
The position may be office-based hybrid or remote depending on the successful candidates location and experience.
Occasional travel may be required for team meetings customer workshops implementation support or training.
Some flexibility may occasionally be required when supporting international customers operating in different time zones.

What We Offer
The opportunity to help shape a new application framework and product platform.
A varied role involving new development architecture integrations and modernisation.
Exposure to international customers and complex operational software.
The opportunity to work with modern Microsoft and AI technologies.
A small-team environment where individual contributions have a visible impact.
Opportunities to influence technical direction development standards and future products.
Ongoing professional development and training.

Measures of Success
Success in the role will include:
Delivering reliable functionality within agreed timescales.
Producing maintainable and reusable framework components.
Reducing defects and support issues through good design and testing.
Improving application and database performance.
Supporting the successful migration of Windows functionality into the web platform.
Contributing positively to development standards documentation and team knowledge.
Using AI-assisted development tools effectively while maintaining appropriate code quality security and review controls.
Helping deliver a secure scalable and commercially successful web platform.

Jonas Software is a leading provider of enterprise management software solutions serving a wide range of vertical markets including hospitality healthcare construction education personal care fitness leisure moving and legal services to name a few. Within these markets Jonas is comprised of over 65 distinct brands each a respected leader in its domain.

Jonas vision is to be the branded global leader across these verticals and to be recognized by customers and industry stakeholders as the trusted provider of Software for Life. We are committed to technology product innovation quality and exceptional customer service.

Jonas Software supports over 60000 customers in more than 30 countries. We employ over 6000 skilled professionals including industry experts and technology specialists. Across our broader network we support a global workforce of more than 30000 employees.

Headquartered in Canada Jonas Software has a global footprint with offices around the world. Were a 100% owned subsidiary of Constellation Software Inc. based in Toronto publicly listed on the TSX () and a member of the S&P/TSX 60 Index.