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Full time
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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

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