Top .NET Developer Jobs in London

Lead and deliver global sustainable procurement and supply-risk programmes. Embed sustainability and risk practices into sourcing, supplier management and procurement processes; develop governance and implementation plans; perform ESG and risk analysis; support regulatory and supplier ESG requirements; monitor programme performance and engage stakeholders to drive adoption across regions.

Design, implement and support DevOps practices to improve delivery, automation, monitoring and software quality. Build and maintain CI/CD pipelines, IaC (Terraform), Kubernetes/Helm deployments, and integrations across databases and services while collaborating with stakeholders, QA, IT Ops and InfoSec.

Sell and close net-new enterprise customers in the Energy, Utilities and Resources sector. Prospect, qualify, and develop large transformational deals; build C-level relationships; create territory and account plans; manage pipeline and CRM; leverage IFS industry and technology solutions; coordinate internal resources and partners; deliver business cases and ROI; support promotions and events.

Design, build, and maintain full-stack web applications using React and .NET Core. Collaborate with data science, product, and design to deliver scalable cloud solutions, APIs, and UI prototypes. Contribute across discovery, delivery, QA, DevOps, and CI, applying SOLID principles and automated testing.

Senior full-stack developer responsible for designing, building and supporting trade capture/ETRM applications. Work includes Angular (or React) front ends and C#/.NET Core back ends, database and cloud deployments, CI/CD, collaborating with business analysts and traders, improving development processes, and ensuring robust, supportable long-lived solutions.

Develop, enhance and support bespoke, multi-asset trading applications using a Microsoft stack. Work with business stakeholders and senior developers to design, test, deploy and maintain robust front-end (Angular/React) and C#/.NET Core back-end systems, participate in CI/CD, code reviews, and contribute to architecture and process improvements.

Design and govern end-to-end GenAI architectures on Azure for insurance use cases. Build LLM-centric platforms (OCR, RAG, agentic workflows), define prompt and evaluation frameworks, lead implementation teams, ensure scalability, security, cost optimization, auditability, and regulatory alignment. Mentor .NET, React, and GenAI developers and partner with business stakeholders across underwriting, claims, and reinsurance.

Develop and maintain a C# Revit add-in, implement features within the Revit environment, integrate with backend REST APIs, handle data synchronization with the cloud, and contribute to architecture and cross-team engineering decisions.

Work on backend systems to deliver features, improve code quality, own deployment and monitoring, prioritize customers, remove blockers, and contribute to technical decisions within an Agile team.

The role involves developing and maintaining back-end systems for e-commerce platforms using .Net technologies, ensuring data delivery and optimizing application logic. Responsible for integrating API services and enhancing application performance.

The role involves designing and developing high-performance C# solutions for FX trading systems, integrating the Orchestrade platform, and providing technical leadership within the team.

As a .NET Engineer at Trainline, you will develop features, ensure code quality, mentor team members, and manage the development lifecycle.

The Enterprise Sales Account Executive focuses on prospecting, qualifying, and closing new business, specifically within the Manufacturing industry, while developing strategies and maintaining customer relationships.

As a Senior Full Stack Engineer, you'll design and deliver complex features for the Avios App, collaborating with engineers and other roles to enhance mobile experiences and scale the platform.

Lead global Identity & Fraud engineering teams to drive delivery, modernisation, and AI-native practices. Own people leadership, talent strategy, budgeting, vendor management, and cross-functional partnerships. Embed DevOps, cloud (AWS/EKS), Java/.NET full-stack expertise, and AI tools to deliver scalable fraud and identity products for global B2B clients while ensuring governance, security, and operational excellence.

The Senior Backend Engineer will develop features, improve code quality, mentor others, and manage the development lifecycle while focusing on customer priorities and technical decisions.

Lead and deliver carbon accounting, net-zero and climate risk projects (Scope 1-3). Support strategy growth, client origination, project management, data analysis, reporting (SBTi, CDP, SECR), and process improvement while building client and industry relationships.

Design, build and operate backend services in C#/.NET; own full development lifecycle, mentor teammates, improve reliability, observability, CI/CD, and scale microservices across AWS.

Senior developer role focused on building and maintaining data-oriented systems for energy trading: full lifecycle delivery, mentoring, contributing to architecture, collaborating with users and support teams, and ensuring observability and incident resolution for high-volume/low-latency data applications.

Design and ship production-grade AI features into established C# .NET products: prompt and context design, LLM integration, error handling, fallbacks, monitoring, and structured evaluation. Collaborate with product owners and engineers, prototype quickly, harden features, and document work so teams can maintain and adopt AI capabilities safely and effectively.

Build, optimize, and support a scalable AWS cloud risk platform that computes risk for cash and derivative trades using Snowflake-stored data. Develop Python-based risk engines, improve distributed computation performance, reconcile outputs with legacy systems, troubleshoot pricing/risk issues, collaborate with IT teams, and participate in on-call support.

Work as a junior .NET backend engineer building and maintaining backend services, deliver features end-to-end, ensure code quality, participate in deployments and monitoring, improve codebase, and collaborate in Agile teams to support supply integration and scaling.

A mid-level C# .Net Back End Software Engineer responsible for the software development lifecycle, collaborating with teams, and maintaining software applications with a focus on Azure cloud services.

Lead and technically own software products: design, build, test, and maintain scalable, secure C#/.NET applications. Provide technical leadership, architecture, estimation, CI/CD delivery, and coach/develop junior engineers while interacting with customers and mentoring the team.

The Backend Developer will engage in application development focusing on coding, debugging, and collaborating with cross-functional teams to provide technical solutions and improve backend infrastructure.