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Full Stack App Engineer; Client Comms

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Janus Henderson AAA CLO ETF
Full Time position
Listed on 2026-02-18
Job specializations:
  • Software Development
    Full Stack Developer, Software Engineer, C# / Unity Developer, Cloud Engineer - Software
Salary/Wage Range or Industry Benchmark: 80000 - 100000 GBP Yearly GBP 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Position: Full Stack App Engineer (Client Comms)
Location: Greater London

A career at Janus Henderson is more than a job, it’s about investing in a brighter future together.

Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right.

Our Values are key to driving our success, and are at the heart of everything we do:

Clients Come First - Always | Execution Supersedes Intention | Together We Win | Diversity Improves Results | Truth Builds Trust

If our mission, values, and purpose align with your own, we would love to hear from you!

Your opportunity
  • As Application Developer, you will be responsible for defining and developing exciting effective business and systems solutions as well as leading ongoing support for existing ones. You will be an integral member of the Distribution IT Tech Team, working closely with business partners, vendors, IT Product Owners, other Business Analysts, and IT Developers to ensure full delivery of the product lifecycle.
  • Research, design, develop, test, debug, document and support custom .NET applications / Data Warehouse solutions in support of the business needs.
  • Partner with the product owner and delivery team in an agile environment where we interact directly with business partners to establish requirements for and develop new solutions and enhance and maintain existing ones.
  • Deliver to time sensitive product release schedules working as a cooperative team member in an agile development environment.
  • Produce technical specifications and release notes for required features and architectural/framework improvements.
  • Client focused, committed to excellence, strong attention to detail and a team player.
  • Provide ongoing change management including training and documentation updates.
  • Collaborate closely with the wider technology teams to coordinate interdependencies and resolve issues and understand overlaps of teams and applications
  • Use data developer skills to help download and maintain the financial data we use
  • Turn our data into outstanding reports and dashboards used by our business partners
  • Carry out additional duties as assigned
What to expect when you join our firm
  • Hybrid working and reasonable accommodations
  • Excellent Health and Wellbeing benefits including corporate membership to Class Pass
  • Paid volunteer time to step away from your desk and into the community
  • Support to grow through professional development courses, tuition/qualification reimbursement and more
  • Maternal/paternal leave benefits and family services
  • Complimentary subscription to Headspace – the mindfulness app
  • All employee events including networking opportunities and social activities
  • Lunch allowance for use within our subsidized onsite canteen
Must have skills
  • NET Development: Strong proficiency in .NET development, including ASP.NET Core, ASP.NET MVC, C#, and related technologies for building web applications.
  • Data Warehouse: Experience with cloud-native application and data platforms such as Azure, Databricks, and Snowflake.
  • Azure Services: Familiarity with various Azure services, including but not limited to Azure App Service, Azure Functions, Azure Storage, Azure SQL Database, and Azure Active Directory.
  • RESTful APIs: Understanding of RESTful API design and consumption for communication with backend services and data retrieval.
  • Database

    Skills:

    Proficiency in working with databases, particularly SQL databases like Microsoft SQL Server or Azure SQL Database or Snowflake
  • Agile Methodologies: Experience with Agile development methodologies like Scrum or Kanban for project management and collaboration.
  • Continuous Integration/Continuous Deployment (CI/CD): Understanding of CI/CD pipelines to automate the deployment process and ensure a streamlined development workflow.
Nice to have skills
  • Programming

    Languages:

    Proficiency in programming languages such as Python is highly desirable.
  • Azure Active Directory B2C: Experience in configuring and integrating Azure Active Directory B2C for user identity and access management in web applications.
  • Authentication and…
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