Junior Developer – .NET/React

Alcumus

Junior Developer at Planet Mark working on back-end services with .NET Core and front-end components with React. Collaborating with teams to implement technical direction and best practices.

Posted 7/7/2026full-timeLondon • 🇬🇧 United KingdomJuniorWebsite

Tech Stack

Tools & technologies

AzureMongoDB.NETNoSQLReact

About the role

Key responsibilities & impact

Contribute to the development of back-end services using .NET Core and front-end components using React
Work closely with senior engineers and the architecture team to understand and implement established technical direction and best practices (greenfield project)
Actively use GitHub Copilot as part of day-to-day development
Support the use of Azure DevOps, including working with pull requests and contributing to CI/CD pipelines
Assist in designing and maintaining MongoDB schemas and queries
Support integration work with Microsoft Dynamics CRM and other APIs
Write clean, testable code and participate in code reviews

Requirements

What you’ll need

Good understanding of C# and the .NET framework (ideally .NET Core / .NET 6+)
Some experience or strong interest in building modern web applications using React (or similar frameworks)
Eagerness to learn from senior engineers and collaborate across teams, including architecture
Interest or early experience in using GitHub Copilot (or similar tools)
Understanding of RESTful APIs and how to consume them
Basic knowledge of databases, ideally with some exposure to MongoDB or other NoSQL technologies
Strong communication skills and the ability to work effectively as part of an agile team

Benefits

Comp & perks

Hybrid workplace policy, work from office 2-3 days per week
Enhanced Parental Leave
Generous annual leave, with option to buy and sell additional days
Healthcare Plan
Annual Giving Day – an extra day to give back to yourself or your community
Cycle-to-work Scheme
Electric Vehicle Scheme
Pension scheme with employer contributions
Life Assurance – 3X base salary
Rewards Program – access to discounts and cashback
LinkedIn Learning License for upskilling & development

ATS Keywords

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Hard Skills & Tools

C#ASP.NET CoreReactMongoDBRESTful APIsGitHub CopilotCI/CD PipelinesAgile MethodologiesTestable CodeCode Reviews

Soft Skills

Strong CommunicationCollaborationEagerness to Learn