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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Stepstone - **Location:** London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** HTML, .NET Framework, Amazon Web Services, Confluence, JIRA, Automation of Tests, Cascading Style Sheets (CSS), Cloud Computing, Software Quality, Continuous Integration, Command-Query Responsibility Segregation (Software Development), DevOps, Key Management, PostgreSQL, Enterprise Messaging Systems, Microsoft Message Queuing, Microsoft SQL Server, Model View Controller (MVC), Nginx, Node.Js, Nunit, Octopus Deploy, Open Web Application Security, Scrum Methodology, Secure Coding, Vault (Revision Control System), TypeScript, Web Applications, Datadog, ReactJS, Grafana, Cypress (Programming Language), Technical Debt, Backend, Xunit, Webpack, Git Flow, Slack, Playwright, Hashicorp, Apache Kafka, Front End Software Development, Teamcity, Cloudwatch, Kibana, Restful APIs, Terraform, Atlassian Bamboo, Docker, Microservices - **Published:** August 5, 2026 - **Apply:** https://www.totaljobs.com/job/senior-software-engineer/stepstone-uk-job107792917 ## About the Role * Back-end (Primary Focus),Expert in C# and .NET Core with strong experience in MVC, REST API design and best practices; deep knowledge of AWS/cloud computing, microservices, CQRS, event-driven and message-based architectures; experienced with SQL Server, PostgreSQL and Docker-based containerised workloads. * Front-end (Required), Strong experience building user-facing web applications using Node.js, React and TypeScript; solid understanding of HTML, CSS and build tooling (e.g. Webpack); awareness of AI tooling best practices and agentic AI frameworks; able to collaborate effectively with design and product teams to deliver performant, user-centric interfaces. * DevOps, Quality & Security,Strong DevOps and CI/CD expertise with tools such as Bamboo, TeamCity and Octopus; hands-on experience with Infrastructure as Code (Terraform), observability tooling (Grafana, Kibana, Datadog, CloudWatch), automated testing (NUnit, xUnit, Cypress, Playwright), Git-based workflows, and secure development practices including OWASP, secrets management and Vault. * Ways of Working, Comfortable in Scrum/Kanban environments with strong communication skills; experienced with Jira, Confluence, Slack and MS Teams; fluent in English and effective in distributed international teams; able to work aligned to GMT hours (08:00-17:00). * Desirable Skills, Experience with HashiCorp tooling (Terraform, Vault, Envconsul), Nginx for reverse proxying and routing, and messaging platforms such as Kafka or AWS SQS/SNS. ## Description We are looking for a Senior Full Stack Engineer with a strong back-end focus to join one of our Profile domain product teams. This role is full stack by design: you will work across back-end and front-end codebases, contributing to end-to-end product delivery. However, your primary strength will be in back-end engineering using C# and .NET Core in cloud-native AWS environments, while still being confident and hands-on on the front end. You will join an established, autonomous product team owning their product end-to-end, with real ownership over technical design, implementation, and continuous improvement., * Design, build and evolve scalable back-end services using C# and .NET Core, alongside developing front-end features with modern JavaScript frameworks to enhance user experience. * Design and implement RESTful APIs, ensuring high standards of performance, reliability and security. * Build, deploy and operate services in AWS using Docker and Infrastructure as Code, ensuring solutions are production-ready, secure, observable and well-tested. * Contribute to solution and architecture design, balancing rapid delivery with long-term sustainability, while actively reducing technical debt and improving code quality across the stack. * Collaborate cross-functionally with Product, QA and engineering teams to deliver end-to-end features, while mentoring and upskilling engineers in modern .NET, cloud and full stack practices. ## Related Videos - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Post-Quantum Cryptography: Preparing for Q-Day](https://www.wearedevelopers.com/videos/100179-post-quantum-cryptography-preparing-for-q-day) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/videos/1630-streaming-ai-responses-in-real-time-with-sse-in-next-js-nestjs) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)