← Back to Jobs
Full time
Technology
VA
C#/.NET and React. Developer
VallumLondon🇬🇧United KingdomPosted 19 Aug 2026
Quick Overview
Work Type
Hybrid
Schedule
Full Time
Level
Mid Senior
Job Description
Must have 5 + years of experience with C#/.NET and React.
Location: London, UK (3 days a week)
Key Responsibilities
Software Engineering
- Design, develop and maintain modern software applications using C#/.NET and React.
- Build and support REST APIs, Back End services and system integrations.
- Develop and maintain relational data solutions using SQL, including PostgreSQL and/or SQL Server.
- Write clean, maintainable and well-tested code.
- Work across the full software development life cycle, from requirements and technical design through to deployment and production support.
- Take ownership of defined features, integrations or technical workstreams with limited supervision.
- Troubleshoot and resolve application, integration and infrastructure issues.
- Contribute to technical design, code reviews and engineering best practices.
- Identify opportunities to reduce technical debt and improve maintainability, performance and reliability.
- Work across multiple projects and applications, adapting to different architectures, technologies and delivery requirements.
Cloud Engineering & DevOps
- Develop and support cloud-native solutions using AWS.
- Build and maintain infrastructure using Terraform and Infrastructure as Code principles.
- Contribute to CI/CD pipelines and deployment automation.
- Work with relevant AWS services across compute, storage, networking, monitoring, identity and security.
- Support application deployment, configuration and operational readiness.
- Apply appropriate cloud, security and operational best practices.
- Investigate and resolve issues across both application and infrastructure layers.
- Contribute to monitoring, observability and production support activities.
Skills
SQL
SQL Server
AWS
C#
PostgreSQL
REST
React
Terraform
Similar jobs
Senior Full Stack Lead Engineer ReactJS, - Huxley
Huxley · London, United Kingdom
1 hour ago£90k - £130k/yrSenior Kotlin Developer - Glasgow
Harvey Nash IT Recruitment UK · Glasgow, United Kingdom
2 hours agoJava Developer (SC Cleared)
scrumconnect ltd · City, United Kingdom
2 hours agoC Developer
Hackajob Ltd · Gloucester, United Kingdom
3 hours agoSenior M365 Developer
Hays · Ashton-Under-Lyne, United Kingdom
3 hours ago£55k/yrPython Counterparty Credit Risk Senior Developer, Vice President - Citi
Citi · London, United Kingdom
4 hours ago