Senior Backend Architect – C#/C++, Desktop & Cloud

LEAP29; Oxford; On-site; GBP 58,000 - 98,000; Full time

Job summary

LEAP29 in the United Kingdom is seeking an experienced software engineer to design, develop, and maintain high-performance desktop and cloud applications.

You will own solutions from architecture to deployment, work across C#/.NET and C++ codebases, and modernise legacy scientific software with modern frameworks and UI/UX.

The role emphasizes best practices, testing, CI/CD, collaboration with stakeholders, and exploration of AI-assisted development tools to boost productivity.

Qualifications

• 5+ years of production-grade software development experience.
• Strong C# and .NET experience.
• Strong C and/or C++ development experience.
• Experience building complex desktop applications in engineering/science/data-intensive environments.
• Solid understanding of software architecture, OO design, design patterns, SOLID.
• Experience with automated testing, Git, code reviews, and CI/CD pipelines.
• Exposure to cloud technologies such as Azure, AWS, or Google Cloud.
• Experience modernising legacy applications and improving UI/UX frameworks.
• Excellent communication and stakeholder management skills.
• Degree in Computer Science, Software Engineering, or related Engineering discipline.
• Desirable: Scientific/engineering/geoscience/reservoir engineering/technical software development experience.
• Desirable: Experience with large scientific datasets and numerical algorithms.
• Desirable: Knowledge of AI-assisted development tools such as GitHub Copilot and AI-powered testing tools.

Responsibilities

• Design, develop, and maintain high-performance desktop and cloud applications.
• Take ownership of technical solutions from architecture through to deployment.
• Work across modern C#/.NET and C++ codebases.
• Modernise legacy scientific software and migrate applications to modern frameworks and user experiences.
• Implement best practices around software architecture, design patterns, SOLID principles, testing, and CI/CD.
• Collaborate with Product Owners and technical stakeholders to define and deliver scalable solutions.
• Conduct code reviews and mentor developers across the team.
• Explore and adopt AI-assisted development tools and emerging technologies to improve productivity and software quality.

Skills

C#/.NET experience

C/C++ development

Communication & stakeholder management

Automated testing

Git

CI/CD pipelines

Cloud platforms

UI/UX modernization

Architectural understanding

Education

Bachelor's degree in Computer Science or Software Engineering

Tools

Git

CI/CD

Azure

AWS

Google Cloud

AI-assisted development tools

Job description

LEAP29 in the United Kingdom is seeking an experienced software engineer to design, develop, and maintain high-performance desktop and cloud applications.

You will own solutions from architecture to deployment, work across C#/.NET and C++ codebases, and modernise legacy scientific software with modern frameworks and UI/UX.

The role emphasizes best practices, testing, CI/CD, collaboration with stakeholders, and exploration of AI-assisted development tools to boost productivity.