Senior Developer
- Posted 24 February 2026
- LocationSunderland
- Business Area IT
- Reference054765
Job description
We are looking for an experienced Senior Developer to join our core development team.
In this role, you’ll work on the development of internal projects, mentor junior developers, and drive technical excellence across our digital delivery. This is an exciting opportunity to shape scalable, secure, and performant solutions for a wide range of clients and internal stakeholders. It requires someone who has appropriate technical ability who can also communicate technical concepts and issues to non-technical users.
Key Responsibilities
- Contribute to the end-to-end development and architecture design of software solutions
- Assist the Lead in creating scalable and maintainable codebases using best practices in C#, ASP.NET, and other related technologies
- Coach other team members where needed to improve their skills and the delivery of projects
- Manage tickets (incidents) appropriate to the Development team
- Maintain and develop integration with 3rd party systems
- Identify and suggest opportunities to improve systems and underlying data through continuous improvement
- Take responsibility for Information Security in compliance with ISO27001
Competencies Required
- Strong communication skills, with the ability to explain technical concepts in non-technical terms
- Attention to detail & accuracy
- Excellent problem-solving and decision-making skills
- Effective time management and prioritisation (conscientiousness)
- Ability to work both autonomously and as part of a team
Technical Skills Required
- 5+ years of experience in software development, ideally full stack.
- Proficiency in C#, ASP.NET MVC/Core, Razor, and Entity Framework
- Strong understanding of RESTful APIs, JSON, and integrations with third-party services
- Experience with source control systems, CI/CD pipelines, and deployment automation
- Experience of working with cloud hosted solutions (e.g. Azure)
General
- To undertake any other duties that may fall into the job criteria
- To conform with all Company policies and procedures including Health and Safety
- To treat all employees, customer and suppliers with dignity and respect
This job description is not intended as an exhaustive list of all duties and responsibilities of the post but simply reflects the key areas involved
About Us
As the UK’s largest independent travel agency, Hays Travel specialises in providing good value, quality holidays, alongside excellent customer service. We work with all leading suppliers and can package holidays that include hotels, flights, cruises, tours, attraction tickets, and more. We have over 470 Branches throughout the UK and our Head Office based in Sunderland, is home to tour operator teams, finance, marketing, people/HR and IT, plus many more. We have been operating for over 40 years, and continue to grow each year.
Our values
Our SMILE values are embedded in to our company and ensure our teams work strongly together. You and all of our colleagues will ensure that the Hays Travel values are demonstrated at all times.
- Supportive
- Motivational
- Innovative
- Loyal
- Excellent
What it’s like to work for us?
Whichever location or department you work in, our people are always at the heart of everything we do. We offer a range of training programmes to help you progress personally and professionally, as we know the benefits of promoting and rewarding our hardworking colleagues are extremely important.
Of course, it's not all about work. We're very sociable and there are always lots of team nights-out and company parties. Plus, there are opportunities to travel abroad on educational trips, and you can also take advantage of our colleague discount when booking your own holidays.
Hays Travel is committed to safeguarding and promoting the welfare of all colleagues. As an accredited employer provider of apprenticeships, we undertake basic checks through the Disclosure and Barring Service (DBS) to ensure the safety of our apprentices for relevant roles.
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