Senior .NET Engineer: Scalable Backend & API Expert

United States Digital Space LLC; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

United States Digital Space LLC is seeking a Senior Software Engineer to oversee the quality, development, and execution of software products. You will join TechOps and collaborate with teams across Barcelona, New York, London, Manchester, Bucharest and India on backend systems.

You’ll design and maintain robust APIs for web and mobile, emphasize security and performance, and mentor junior engineers. Strong DOTNET/C#, REST, and Agile experience are essential.

Qualifications

• Bachelor's or Master's degree in computer science, engineering, or related field.
• 8+ years of experience in software development, with a focus on building scalable and reliable systems.
• Extensive knowledge of DotNet C#, LINQ, MS SQL, Entity Framework and related technologies.
• Capable to use version control software such as GIT.
• Knowledge of SOLID principles
• Knowledge of clean code practices
• Experience using web service protocols such as Rest, API design for extensibility and integration
• Experience debugging complex applications
• Experience with Agile development project management methodologies
• Database Development in SQL Server or NoSQL Databases
• Some familiarity of Docker
• Experience debugging complex applications
• Excellent communication and collaboration skills with a proven ability to work effectively in a team environment
• Azure, AWS, RabbitMQ and Quartz experience is a plus

Responsibilities

• Engage in all phases of application development, with a focus on coding and debugging in alignment with security standards throughout the entire lifecycle
• Design, build, and maintain efficient, reusable, and reliable code/APIs to support applications both for web and mobile
• Collaborate regularly in a cross-functional team made up of product managers, quality assurance teams, designers and other developers to translate business requirements into technical solutions
• Collaborate with Front-end developers to integrate user-facing elements with server-side logic
• Identify bottlenecks and bugs, and devise solutions to mitigate and address issues
• Optimize web applications for performance, scalability and security
• Implement security best practices to safeguard sensitive data and protect against potential threats
• Develop automation tests/ collaborate with automation engineers to ensure business needs are met, and allow for regression testing
• Work closely with users to provide personalized software support as needed
• Stay updated on emerging technologies and industry trends to continuously improve our backend infrastructure
• Document application support and operational procedures
• Mentor junior engineers and provide technical guidance to foster their growth and development

Skills

DotNet C#

LINQ

MS SQL

Entity Framework

GIT

SOLID principles

Clean code

REST APIs

Agile

Docker

Azure

AWS

RabbitMQ

Quartz

Education

Bachelor's or Master's in CS/Engineering

Tools

GIT

Job description

United States Digital Space LLC is seeking a Senior Software Engineer to oversee the quality, development, and execution of software products. You will join TechOps and collaborate with teams across Barcelona, New York, London, Manchester, Bucharest and India on backend systems.

You’ll design and maintain robust APIs for web and mobile, emphasize security and performance, and mentor junior engineers. Strong DOTNET/C#, REST, and Agile experience are essential.