6 senior c engineer jobs found

Senior C# Engineer – .NET 9/10, AWS Lambda, SQS, SNS – OUTSIDE IR35 £700–£800 per day • Outside IR35 ? 100% Remote • 11 month rolling contract Takeaway: Contribute to the architecture and build of a major greenfield B2B SaaS platform as a deeply senior, hands-on C# engineer, with heavy emphasis on deep .NET engineering , high-performance distributed systems , and real-world AWS serverless delivery . You’ll also have the opportunity to develop hands-on skills with Claude Code , one of the most advanced AI-assisted development tools in the industry. Role Overview: You’ll operate as the technical spearhead for a greenfield product build, reporting to the Director of Engineering. Expect deep backend engineering, distributed system design, and high-quality serverless delivery, plus the chance to adopt modern AI-assisted development practices as part of your workflow. What You’ll Bring: Senior/Staff-level backend mastery in C# and .NET 9/10 , with...

Senior Full Stack Developer - C#/Azure/Kafka Internal Title: Software Engineering Senior Consultant Location: London, UK (Hybrid - typically 1-2 days per week in office/client site) Contract: 6-month rolling contract Rate: £600-650 per day, Outside IR35 Start: ASAP About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering capability focuses on modern application development, cloud-native architecture, event-driven systems, and improving delivery outcomes through better engineering practices. We work across complex, high-impact environments in both the public and private sector, delivering solutions where quality, scalability, reliability, and security are critical. About the Role We’re looking for a Senior Full...

Embedded Software Engineer – IoT location: Kinsgton Upon Thames Rate: £60pphr + VAT, outside IR35 Onsite: 2-3 days per week onsite. Duration: 15 months Role Overview We are looking for an Embedded Software Engineer to develop firmware for connected IoT products, working closely with electronics, hardware, cloud and product engineering teams. Key Responsibilities Design, develop and maintain embedded firmware for IoT devices. Develop robust, efficient software primarily in C/C++. Work with microcontrollers, sensors, peripherals and communication interfaces. Develop and integrate drivers using SPI, I²C, UART, GPIO, ADC and PWM. Develop applications using RTOS or bare-metal architectures. Develop power-management strategies for battery-powered devices. Implement secure boot, device security and OTA firmware updates where required. Technical Skills Essential: Strong embedded C/C++ development experience. Microcontroller-based systems. Embedded debugging...

Technical Project Manager - Data Segregation & Security Location: London/Hybrid - minimum 2 days per week in the London office Contract: Outside IR35/6 months Initial We're looking for an experienced Technical Project Manager to lead a high-profile, enterprise-wide data segregation and security programme within a major UK media and entertainment organisation. Following a significant business transaction, the organisation is undertaking a complex technology separation programme to logically isolate one part of the business from retained corporate and studio operations, ahead of a future divestiture. This is a business-critical programme operating under significant regulatory scrutiny , with key audit and delivery milestones running through 2027. You'll be responsible for orchestrating the delivery of complex technical controls across a large-scale Google Workspace environment, ensuring the organisation can meet its regulatory commitments while maintaining business...

Senior Full Stack Developer (React / C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) IR35 Status: Outside IR35 Location: Hybrid Working - Approximately 1 day per week in Birmingham (flexible based on project requirements) Rate: £500 per day Outside IR35 Overview We are seeking experienced Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing to data migration, integration, and technical design activities. The successful candidates will be strong engineers with deep expertise in React and C#/.NET , capable of operating across the full technology stack and collaborating closely with Product Owners, Business Analysts, Architects, and Testing teams...

Senior Full Stack Developer (React / C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) IR35 Status: Outside IR35 Location: Hybrid Working - Approximately 1 day per week in Birmingham (flexible based on project requirements) Rate: £500 per day Outside IR35 Overview We are seeking experienced Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing to data migration, integration, and technical design activities. The successful candidates will be strong engineers with deep expertise in React and C#/.NET, capable of operating across the full technology stack and collaborating closely with Product Owners, Business Analysts, Architects, and Testing teams within an Agile...