Senior Full Stack Developer
Confirmed on the employer's own hiring board on Oct 18, 2026. First seen by Alion on Aug 13, 2026. Version 1 scores B on the Alion truth index.
Version 1 has celebrated 30 years in business and continues to be trusted by global brands to deliver technology and transformation solutions that drive customer success. Our deep expertise enables our customers to navigate the rapidly evolving technology landscape. We foster strong partnerships with global technology leaders including Microsoft, AWS, Oracle, Red Hat, OutSystems, Snowflake, ensuring that our customers are provided with the highest quality solutions and services.
We’re an award-winning employer reflecting how our employees are at the very heart of what we do:
- UK & Ireland's premier AWS, Microsoft & Oracle partner
- 3300+ strong, €350/£300m revenue business
- 10+ years as a Great Place to Work in Ireland & UK
- Best Workplace for Women in the UK & Ireland by GPTW
- Best Workplace for Wellbeing in the UK by GPTW
We’re a core values driven company, we hire people who share our values, and we reward those who display and foster them, it’s deeply embedded within our DNA. Invest in us and we’ll invest in you!.
Position Overview
As a Senior Developer you will expect to immediately lead the delivery of capabilities in a growing and dynamic technology team. You will be expected to be a technical leader in the team, and mentor junior developers in their developer journey. Some people management may be required.
Working in a fully Agile Scrum/Kanban team, you will be exposed to a diverse range of technologies and like-minded people, all with the same mission - to ensure Aon remains the #1 data-driven broker in the world.
This role requires a mix of hands-on technical expertise, leadership, and stakeholder management, ensuring the successful delivery of solutions in an Agile environment.
The successful candidate will have a strong foundation in object-oriented programming, modern JavaScript/TypeScript, cloud technologies (Azure), and SQL databases. They should be proactive, self-motivated, and capable of mentoring team members while collaborating effectively with international clients and cross-functional teams.
Key Responsibilities
- Building and maintaining Single Page Applications (SPAs), using technologies such as Typescript, React, and D3.js.
- Using C# to build API’s both for specific application use, and more general use across the application estate.
- Contributing to design, build, test & maintenance activities and be genuinely motivated by delivering solutions and issue resolutions to our business
- Develop and maintain CI/CD pipelines as code
- Promote and adhere to development standards through automation tooling and manual controls incl. JIRA, agile standards, code reviews and release automation, etc
- Work with Product Owners, Scrum Masters and Business Analysts on the vision, design, requirements, and delivery of web-based analytics applications
- Develop a thorough understanding of the functional and non-functional requirements of the application, how customers use it, and how best to serve these needs
- Ensure effective operation of business systems through Level 3 support of application incidents, effectively triaging bugs, code/data fixes, testing & patching processes
- Welcome the opportunity to assist and spread knowledge to other members of the team
- Support QA in testing products and resolving found issues
- Deliver and maintain solution/process documentation to an agreed level
- Track and report on progress to IT Development Manager, Product Owners & Scrum Masters
Required Skills
- Bachelor’s degree in engineering/computer science with 8+ years of professional experience, including 4+ years of leading and mentoring development teams.
- Minimum 6 years of experience in development; C#, Advanced JavaScript (preferably React)
- BS or MS degree in Computer Science, Information Technology or equivalent experience
- Keenly interested in software development, staying up to date with current trends and able to translate those into solutions
- Experience with Cloud (AWS), Serverless Architecture, Agile, DevOps (CI/CD) and database technologies
- Someone with good interpersonal and communication skills, comfortable and composed
- Experience working in Agile environments
- Working in a high-pressure environment
- UI/UX experience a plus
- Exposure to code quality and observability tools like SonarQube and Application Insights.
- Strong leadership in Agile/Scrum methodologies - sprint planning, backlog refinement, estimation, conducting code reviews, and enforcing coding standards.
- Excellent communication, presentation, and stakeholder management skills, with the ability to translate business needs into technical solutions.
- Willingness to work in UK shift hours for effective collaboration with global teams and clients.
Desired Skills
- Azure Developer Associate certification.
- Azure Solution Architect certification.
- Agile certifications such as CSM (Certified ScrumMaster) or PSM (Professional Scrum Master).
Why Version 1?
At Version 1, we believe in providing our employees with a comprehensive benefits package that prioritises their wellbeing, professional growth, and financial stability.
- Share in our success with our Quarterly Performance-Related Profit Share Scheme, where employees collectively benefit from a share of our company's profits
- Strong Career Progression & mentorship coaching through our Strength in Balance & Leadership schemes with a dedicated quarterly Pathways Career Development programme
- Flexible/remote working, Version 1 is tremendously understanding of life events and people’s individual circumstances and offer flexibility to help achieve a healthy work life balance
- Financial Wellbeing initiatives including; Pension, Private Healthcare Cover, Life Assurance, Financial advice and an Employee Discount scheme
- Employee Wellbeing schemes including Gym Discounts, Bike to Work, Fitness classes, Mindfulness Workshops, Employee Assistance Programme and much more. Generous holiday allowance, enhanced maternity/paternity leave, marriage/civil partnership leave and special leave policies
- Educational assistance, incentivised certifications, and accreditations, including AWS, Microsoft, Oracle, and Red Hat
- Reward schemes including Version 1’s Annual Excellence Awards & ‘Call-Out’ platform.
- Environment, Social and Community First initiatives allow you to get involved in local fundraising and development opportunities as part of fostering our diversity, inclusion and belonging schemes.
And many more exciting benefits… drop us a note to find out more.
Version 1 is an equal opportunities employer.
We are committed to building a diverse, inclusive and respectful workplace where everyone feels valued and able to thrive. We welcome applications from people of all backgrounds, identities and lived experiences, and we value the different perspectives people bring including those shaped by disability and neurodiversity.
We want every candidate to have a positive and accessible recruitment experience. If you need reasonable adjustments at any stage of the process, please contact your recruiter at Version 1. We will consider all requests carefully, respectfully and confidentially.
Video links: