.NET Senior Software Engineer

Company: Gazelle Global
Apply for the .NET Senior Software Engineer
Location: London
Job Description:

Opportunity

Senior Software Engineer .NET SQL

  • We are seeking a Senior Software Engineer with strong expertise in .NET, SQL. This role involves designing, developing, and optimizing enterprise-grade applications, with a focus on scalability, performance, and high-quality engineering practices.
  • You will work closely with business and engineering teams to deliver robust, production-ready solutions in an Agile environment, while also contributing to architecture decisions and mentoring junior developers.

Essential skills/knowledge/experience:

  • Over 8+ years proven experience as a Software Developer, architecting, developing and testing large-scale data intensive applications in an enterprise environment
  • Solid Prior experience of Database modelling / design, performance tuning, and optimization
  • Thorough knowledge of application programming for data intensive applications on SQL Server using Stored Procedures / tSQL
  • Proficiency in C# .NET, including designing and implementing RESTful APIs and microservices
  • UI development for business-critical applications in Angular, JavaScript, HTML/CSS and other modern UI technologies
  • Strong understanding of AWS cloud infrastructure and native services – AWS EC2, EKS, Lambda, SQS, SNS, AWS Glue etc.
  • Experience with unit testing frameworks (e.g. MSTest, tSQLt) and Behaviour-Driven Development (BDD) tools (e.g. Cucumber, Mocha).
  • Proven ability to deliver high-quality, maintainable code and systems.
  • Extensive experience in software engineering principles, CI/CD tools and automation processes
  • Some experience of Business and Technical Analysis, Quality Assurance, Delivery Management, and/or Emerging Technology and Governance
  • Experience working in an agile environment with a focus on collaboration, automation, and continuous improvement
  • Experience with Financial Markets in Equities and / or Fixed Income
  • Prior experience with Java (including SpringBoot) and / or Python for cross-platform integrations, greenfield and legacy systems is hugely advantageous
  • Familiarity with Sybase and PostgreSQL, including database management and optimization

Your responsibilities:

  • Contributes and leads development through high-quality software design and architecture
  • Identifies, prioritises, and performs tasks in the software development lifecycle
  • Develops tools and applications by producing clean, efficient and scalable code
  • Advocate for and implement engineering guidelines for excellence, including automation, code reviews, continuous integration/continuous delivery (CI/CD), and performance tuning
  • Ensures high quality, reliable products using unit, integration and BDD test suites
  • Collaborates closely with business and engineering partners to deliver products, services, improvements and solutions to meet customer needs and align with goals of the business and engineering lines
  • Communicates with clarity, precision, and influence, presenting complex information in a clear and concise format that is appropriate for the audience
  • Drive a culture of engineering excellence through mentorship, peer reviews, and promoting standard methodologies in software design and development
  • Continuously optimize systems for performance, scalability, and security in a fast-paced, production environment

Posted: April 29th, 2026