Senior Application Developer – .NET & Azure Integration Services

Mphasis; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Mphasis is seeking a Senior Application Developer – .NET & Azure Integration Services in London to independently design, develop, test, and deliver enterprise-grade integration solutions on Azure. You will work on an Enterprise Integration Platform with strong focus on .NET Core, API design, asynchronous messaging, and CI/CD deployments.

Ideal candidates have 12–15 years of experience in .NET full stack development, deep knowledge of Azure, microservices, and secure, scalable cloud-native

Qualifications

• Experience in designing enterprise integration solutions.
• Strong background in .NET Core and Azure services.
• Hands-on with APIs, messaging, and integration patterns.

Skills

Software architecture

Design patterns

Distributed systems

Azure integration services

C# / .NET Core

APIs & web services

CI/CD

Infrastructure-as-Code

Tools

Azure DevOps

GitHub

Terraform

Bicep

Job description

Location: London, UK

Job Summary

We are looking for a highly experienced, hands‑on Senior Application Developer – .NET & Azure Integration Services who can independently design, develop, test, troubleshoot, and deliver enterprise‑grade integration solutions.

The candidate will work on an Enterprise Integration Platform (EIP) built on Microsoft Azure and should have strong experience in .NET Core, Azure Integration Services, APIs, asynchronous messaging, integration patterns, Infrastructure‑as‑Code and automated CI/CD deployments.

Years of experience needed: 12-15 Years of Experience in .Net full stack Development.

Technical Skills: Must Have

Technical Leadership & Architecture

• Strong understanding of software architecture principles and ability to contribute to solution and technical design discussions
• Good knowledge and practical application of design patterns
• Good understanding of distributed application and integration architecture patterns (e.g. Microservices, Event‑driven architecture, Publish/Subscribe etc.)
• Ability to define and enforce coding standards, best practices, and architectural guidelines.
• Understanding of SOLID principles, Clean Architecture and separation of concerns.
• Make technology decisions aligned with business goals and scalability requirements.
• Ability to translate architecture and solution designs into high‑quality working software.
• Strong hands‑on experience in design, develop, and deploy applications using Microsoft Azure using following services particularly:
• Good understanding of secure enterprise application development in Azure
• Implement cloud‑native solutions focusing on security, scalability, and performance.
• Monitor, troubleshoot, and optimize applications in Azure environments

Infrastructure‑as‑Code & DevOps

• Strong understanding of Infrastructure‑as‑Code principles.
• Ability to provision and configure Azure resources using Bicep/ terraform.
• Good exposure and experience of Continuous Integration (CI) and Continuous Delivery (CD) tools and end‑to‑end solutions like (Aure DevOps, Github)
• Experience with source control, pull requests, branching strategies and code reviews.

Core Technical Skills

• Programming experience in Microsoft technologies (C#, ASP.NET, .Net Core, Web API, Multi‑threading)
• Actively contribute to development using C#, .NET Core, ASP.NET Core.
• Knowledge of MVC Framework.
• Work with relational databases to design and optimize data models.
• Must have used/worked on Sql Server
• Build and maintain RESTful APIs and backend services.
• Strong understanding of enterprise application integration concepts and integration architecture.
• Experience designing and developing integrations between cloud, on‑premises and third‑party applications
• Good understanding of API contracts, authentication, authorization and secure service‑to‑service communication.
• Experience with Web Services (SOAP/Restful), RESTful APIs, test‑driven development and cloud development.
• Exposure in hosting and setting up container‑based applications.
• Experience is Api Gateway Management services
• Exposure to Caching Framework like (Redis, Apache Ignite etc)
• Exposure to Log Monitoring Tools like (Elastic Search & Splunk etc )
• The ability to understand and support, modify, and maintain systems and code developed by other engineering teams.

Soft Skills

• Excellent customer‑facing communication and presentation skills.
• Proven experience working directly with customer technical stakeholders and leadership teams.
• Ability to influence technical decisions through strong communication and consultative engagement.
• Strong facilitation skills for workshops, solution discussions, and technical governance meetings.
• Experience managing stakeholder expectations in complex enterprise delivery environments.

Good to have:

• Experience within Insurance, Banking, Financial Services or another regulated industry would be preferred
• Worked in Agile Development Environment.