Sr. C#.Net (core) developer to support support team in delivering bug/fixes, operational enhanc[...]

S.i. Systems; London; Remote; GBP 55,000 - 90,000; Full time

Job summary

A leading company is seeking a Sr. C#.Net (core) developer in London to enhance in-house software functionality. Candidates should have substantial experience in C#, SQL Server, and cloud services, with a focus on agile development methodologies. This role requires collaboration with support teams to deliver high-quality solutions and maintain existing applications.

Qualifications

• 7+ years’ experience building APIs and web applications.
• 5+ years programming for SQL Server.
• 3+ years designing single-page applications with Angular.

Responsibilities

• Plan, coordinate and oversee activities related to development of in-house software.
• Ensure technical architecture is followed and services are maintained.
• Provide technical support and participate in scheduling and planning.

Skills

C# (.netcore)

SQL Server

EF Core

Angular v4+

Bootstrap v4/v5

DevSecOps

Education

Microsoft Azure cloud services certification

Tools

AzureDevOps

Jira

Job description

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Sr. C#.Net (core) developer to support support team in delivering bug/fixes, operational enhancements, and new functionality to existing in-house software, London

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Client:

S.i. Systems

Location:

London, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

ddd7fb030e85

Job Views:

3

Posted:

29.06.2025

Expiry Date:

13.08.2025

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Job Description:

Our valued client is looking for a Sr. C# .Net (core) developer to support support team in delivering bug/fixes, operational enhancements, and new functionality to existing in-house software

This is a remote opportunity (Eastern Time Zone Hours)

Tasks include:

• Plan, coordinate and oversee activities related to the solution design, development and integration of information systems and operations systems in support of core organizational functions.
• Responsible for ensuring that the technical architecture is followed and that services necessary to meet the changing needs of the organization are implemented and maintained.
• Provide technical support, guidance, advice, and participates in the areas of scheduling, technical direction, future planning, and standard development practices.
• Coordinates system analysis and application development activities through direct and indirect staff
• Work with a team of system analysts to deliver bug/fixes, operational enhancements, and new functionality to existing in house software.
• Translate business requirements into viable technical solutions.
• Ensure implementations follow proper corporate design, development and deployment standards and adhere to corporate security policies.
• Conduct thorough unit testing documenting test results. Design and implement automated unit testing framework as required. Collaborate with Testing team for testing of overall technical solution.
• Ensure all changes are developed in a secure source control process, allowing for deployment and rollback of releases where necessary.
• Define levels of security/access control required for technical solution within and across non-production environments.
• Leads/Assists in the deployment of new applications and enhancements to existing applications, utilizing modern DevSecOps practices
• Reviews and analyzes the effectiveness and efficiency of existing systems and develop strategies for improving or further leveraging these systems.
• Support go-live activities to transition to Production.
• Perform knowledge transfer to Solution Support team to ensure product sustainability.
• Collaborate with Solutions Support team(s) and contribute to Level 3 Support activities for Incident and Problem resolution as required

Must have:

• 7+ years’ experience building APIs and web applications in C# (.netcore)
• 5+ years’ experience programming for SQL Server and EF Core
• 3+ years designing, coding, and testing single-page applications utilizing the Angular v4+ framework, utilizing Bootstrap v4/v5
• 7+ years’ experience in IT systems development, full software agile lifecycle or related experience
• Full-stack development experience (front-end, back-end and database development)
• Experience and/or formal training and/or certification inMicrosoft Azure cloud services
• Experience with AzureDevOps or Jira

Nice to have:

• Experience with system integration of the following platform: Salesforce, ServiceNow, Denodo
• Experience working with 3rd party vendors and integrating applications.
• Experience in an Insurance or Financial Services environment.
• Experience working as part of an Agile team with Business Subject Matter Expert, Business Analyst, Solution Architect, Tester, Scrum Master, Product Owner.
• Ability to operate under structured release management frameworks, including the need for various environments, system maintenance, risk avoidance, etc.