Senior Software Developer

Senior Software Engineer (Contract)
3-Month Engagement | Outside IR35 | Up to -475 per day | Hybrid (London / Ipswich)

A rapidly expanding SaaS company is seeking an experienced Senior Software Engineer to support their agile delivery team on an initial 3-month contract. This position offers a strong mix of hands-on development and strategic input, with the opportunity to shape system architecture, influence engineering practices, and contribute directly to product evolution.

You''ll play a key role in designing, building, and improving scalable cloud-native applications, while also guiding team members and promoting high standards across the development lifecycle.

Core expertise required:

• Advanced experience with C# and .NET (Framework and Core)
• Frontend development using TypeScript, HTML, CSS, and either React or Vue
• Proven track record with AWS, ideally including serverless architectures (e.g., Lambda)
• Experience with CI/CD pipelines and Infrastructure as Code (Terraform or CDK)
• Strong grounding in clean architecture, SOLID principles, and code maintainability
• Knowledge of API integration and secure development practices (OWASP)

What you''ll be doing:

• Delivering end-to-end software solutions in a modern tech stack
• Working closely with product managers, QA, and engineering leadership
• Conducting code reviews and providing mentorship to developers
• Maintaining and enhancing live systems, with a focus on continuous improvement

Desirable (but not essential):

• Experience with TDD or BDD methodologies
• Familiarity with PCI or ISO standards
• Exposure to VoIP technologies
• Knowledge of Python or AI-related development

This role follows a hybrid working model, with occasional travel to London or Ipswich (approximately once per month).

An excellent opportunity to contribute to a high-performing team building robust, secure, and scalable SaaS solutions.