Senior Software Developer

Senior Software Developer

Final date to receive applications: 5 January 2026

Department: Technology & Product

Employment Type: Permanent

Location: Cardiff, UK

Reporting To: Manager, Software Development

Building innovative solutions; enabling safer workplaces for everyone.

We’ll create a safer working world, building software to support a global network of responsible buyers, suppliers and partners. At Alcumus we take the pain out of compliance for over 50,000 organisations globally, helping them protect their people, their operations, and the planet. The tech we build today, will create a better tomorrow.

The Senior Developer role will work collaboratively within a multi-functional team of Developers, Dev Ops Engineers, QA Analysts and Product Owners to enhance and create software application to a high standard. Working within a Scrum squad you will have support and mentorship to flourish while joining and contributing to all the sprint events and help facilitate the team successfully completing the sprint objectives.

• Be an integral part of the development team, actively supporting development of tools, services and platforms.
• Review and contribute to the ongoing improvement of team practices and Ways of Working with an aim to making the team more effective and improving delivery.
• Collaborate with other teams – both within the Technology department and across the business - to identify improvements to existing processes and services or where new services could be developed.
• Work closely with key stakeholders in the collection and documentation of user requirements and the development of user stories.
• Plan, write, test and maintain code for web, mobile and desktop business applications in accordance with established standards in an Agile environment.
• Troubleshoot and assist with investigation of production escalations and issues.
• Assist and recommend on architectural and technical decisions.
• Participate in peer-reviews of solution designs and related code.
• Assist and participate in production releases and updates that will further enhance our applications.
• Work closely with the quality teams to ensure that standards are maintained.
• Provide third-level support to business users.
• Adapt and learn to work with other languages/platforms where required.
• Keeping up to date with the latest relevant technological innovations.

• Proficiency in microservices architecture and RESTful API development.
• A desire to become a lead developer.
• Awareness of AI Tools such as Git Hub Copilot.
• Good experience of working with relational databases, i.e. SQL and MySQL (including database triggers).
• Good understanding of modern software architectures (e.g., microservices, event-driven, CQRS).
• Hands‑on expertise of AWS (ECS, Lambda, API Gateway, ECR, S3), Docker
  · Understand and can write unit tests (TDD, JUnit, Mockito).
• Experience of version control such as Git Hub.
• Competent with Microsoft Office Applications (Word, Excel, PowerPoint and Outlook).
• Strong problem‑solving skills, attention to detail, and eagerness to learn
  · Ability to work effectively within an Agile/Scrum team.
• Good organisational and communication skills.
• Understanding of CI/CD mechanisms such as Git Hub Actions.
• Familiarity with Agile tooling (Jira, Confluence).
• Awareness of security best practices (OWASP, ISO 27001, ISO 27032).
• Degree educated in a relevant discipline.

Alcumus has a hybrid workplace policy
, where you will work from the office 3 days per week. We want you to be able to do your best work here. We emphasize providing many ways to support our team to do their best work and below are some of the perks and benefits we offer.

• 🍼 Enhanced Parental Leave
• 🌴Generous annual leave
• 🏥 Healthcare Plan
• 💟 Annual Giving Day – an extra day to give back to yourself or your community
• 🚲 Cycle-to-work Scheme

• 💰 Pension scheme with employer contributions
• 🧬 Life Assurance – 3X base salary
• 💸 Rewards Program – access to discounts and cashback
• 🏫 Linked In Learning License for upskilling & development

Interested but don’t feel you meet all the requirements?…