asp .net developer jobs in Chesterfield

Senior Backend Developer (.NET | AI-First SaaS Platform) Compensation: Competitive, based on location and experience Location: UK or Turkey (Hybrid – Office & Remote) Keepnet is an AI-driven SaaS platform experiencing strong, sustained growth in the UK with growing global momentum, helping organisations manage human cyber risk at scale. With Agentic AI live in production, Keepnet runs...

You will join a cross-functional product engineering team working on the evolution and modernisation of a core SaaS platform. The focus is on building scalable, cloud-native services while improving reliability, performance, and long-term maintainability.

Business Development Manager - UK Market Entry High-Value Capital Equipment | Aesthetic Medical Technology We are supporting the UK launch of a next-generation aesthetic medical technology platform operating at the intersection of Imaging, software, and AI. Our client is looking for the UK's top performing capital aesthetic reps to join this incredible journey of growth and differentiation from...

ABOUT SIMA SIMA is a high-growth next-generation impact investment manager, known for creating innovative impact investment funds with deep impact. We have to date raised over $400 million in the solar, microfinance and clean cooking sectors, with leading public and private sector impact investors, and currently are raising an additional $400 million fund. Our headquarters is in the US and we...

🚀 About Webigence and Spark Travel Webigence has 25 years of experience crafting UX‑first, often highly complex software. Our engineers pair forward‑thinking agile practices with an obsession for intuitive design, shipping products that feel effortless even when the logic underneath is anything but. Alongside a handful of long‑standing third‑party clients, we’re scaling our own SaaS...

Account Manager – Cyber Security Solutions On behalf of a fast‑growing Cyber Security Solutions provider that helps organisations protect their digital assets and stay ahead of evolving threats, we are seeking a proactive and relationship‑driven Account Manager to nurture and grow a portfolio of mid‑market and enterprise clients. This role blends strategic account development with targeted new...

You will design and build APIs that enable products, partners and AI services to work together, including: Building RESTful APIs using C# .

You will likely bring: Strong experience building backend services in C# .

You will work with your sales leadership team to define your individual territory plan, focusing on new prospects with between 350 to 1499 employees in the UK (more globally). The types of deals that you get to work on will vary; it could be a 3-5 month process with 3/4 stakeholders, at £20-50,000 in year 1 revenue for a local only offering.

Market Design Lead – Switching & Registration Who Are RECCo? We are an independent, non-profit organisation responsible for the Retail Energy Code — a key part of how the GB retail energy market is regulated. But we don’t just manage rules. We look ahead, not just react, helping the market change in the right way. We deliver secure digital services, clear governance, and practical solutions...

You will be working closely with the Machine Learning team; however, you are not required or expected to have background in Machine Learning. This is an applied role, and we are looking to hire a software engineer with experience in cloud computing and distributed systems. In this role, you will:

You will be responsible for building and executing a new business sales strategy, selling Microsoft Data & AI consulting services into enterprise and mid-market customers across FSI, Retail, Private Sector and MSP-led accounts. Key Responsibilities - Own and drive net-new logo acquisition across Data, Analytics, AI and Modern Data Platform services

You will be a key part of the project teams going forward at this very exciting time for the company. The ideal candidate will have commercial experience developing and testing complex Angular modules and integrating them with backend services via REST APIs. Responsibilities & Duties

You will work closely with clients, internal engineering teams, and project stakeholders to ensure high-quality, compliant, and efficient project execution. Key responsibilities include: - Designing control systems and automation solutions - Developing and implementing SCADA systems

Principal Software Engineer Fully Remote | Permanent | Competitive Salary + Benefits Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. This is a rare opportunity to combine hands-on development with strategic influence, guiding architecture decisions and shaping...

Excellent opportunity for an experienced Account Manager to join a high quality claims management business, responsible for a number of reputable clients. GHG Solutions Limited is an UK claims and risk management company with offices in Southampton, Halifax and Enniskillen, Northern Ireland, providing high quality solutions to claim situations. Trading for over 30 years and now private equity...

About the Job This position is for a Senior Software Engineer with a minimum of 5 years of experience in backend development and a passion for building robust, scalable systems. We are looking for an engineer with a strong background in the C# .NET ecosystem, and a preference for candidates with significant experience on AWS. Are you ready for a challenge? We’re looking for a dynamic software...

You will help turn our plans into real growth, driving delivery through aligned investment, policy, and partnership activity with key organisations including local visitor economy partnerships (LVEP's) Your remit in the development of Visit East Midlands will include the shaping and influencing of decisions across infrastructure, events, skills, transport, and place.

You will working as part of integrated design teams to improve the environmental outcomes of our projects – you will identify environmental constraints, identify impact avoidance and mitigation solutions, as well as opportunities to deliver benefits.

You will promote AECOM's environmental services to both internal and external audiences.

Energy Sales Consultant UK Wide £35,000–£45,000 + uncapped commission & performance incentives Our client is an award-winning commercial energy and sustainability consultancy. For over two decades, they’ve helped businesses cut costs, manage usage, and transition to greener energy. From SMEs to complex multi-site organisations, they deliver smart procurement, compliance support, and...

You will own the engineering vision and execution of Keepnet’s core platform, operating across the UK, EU, US, UAE, and Canada, supported by distributed offshore and nearshore teams.

You will not be expected to do everything yourself. Success in this role will be measured by platform reliability, delivery predictability, team health, and customer impact.