Senior Software Engineer

Job 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.

Your responsibilities 

• 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.

Qualifications

• 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.

Additional Information

Your benefits

We’re a community here that cares as much about your life outside work as how you feel when you’re with us. Because your job shouldn’t take over your life, it should enrich it. Here are some of the benefits we offer:  

• 29 days holiday allowance + bank holidays    
• Private medical and dental healthcare    
• Matching pension contribution of 4 or 5% (after 3 years of service up to 10%)    
• 24/7 Employee Assistance Programme  
• Life Assurance Cover   
• Cycle to work scheme    
• Hybrid working model  (3 days working from the office) 
• Volunteering days    
• and you can bring your dog to the office on Mondays and Fridays!    

Our commitment  

Equal opportunities are important to us. We believe that diversity and inclusion at The Stepstone Group are critical to our success as a global company, so we want to recruit, develop, and keep the best talent. We encourage applications from everyone, regardless of background, gender identity, sexual orientation, disability status, ethnicity, belief, age, family or parental status, and any other characteristic. As a global business we further our DEI and sustainability progress by working with national and international bodies and are proud to have been recognised for our work - both locally and internationally, including:   

• Armed Forces Covenant: Silver Award, Employer Recognition Scheme  
• EcoVadis: Bronze Award  
• Fertility Friendly Employer, accredited by Fertility Matters at Work  
• RIDI (Recruitment Industry Disability) Awards: Inclusive Technology Award 2024  
• Stonewall: Gold Award  
• Stonewall: Top 100 Workplace Equality Index (85)