As Software Developer Technical Lead, you’ll play a pivotal role in the development and growth of our Onecloud application, our customer-facing platform delivering self-serve capabilities and analytics. You’ll guide a small, dynamic team, drive architectural decisions, and champion coding standards and best practices. If you thrive in a fast-paced Agile environment and enjoy leading from the front, this is your opportunity to make a real impact.
5+ years’ experience as a Full Stack Developer or similar role
Proficient in ASP.NET Zero, Angular, HTML/CSS, JavaScript, and XML
Strong knowledge of .NET framework and C#
Experience with databases including BigQuery, SQL Server, and Postgres
Skilled in integrating Redis and Elasticsearch for performance optimization
Experience deploying applications on Kubernetes, Cloud Run, and Cloud Functions
Proven UI/UX design experience with a focus on intuitive interfaces
Proficient in CI/CD pipelines and Agile/Scrum methodologies
Strong problem-solving and troubleshooting skills across the full stack
Excellent communication and collaboration skills
Passionate about continuous learning and emerging technologies
Provide technical leadership and mentorship to the development team
Guide architectural decisions, coding standards, and best practices
Participate in sprint planning, refinement, and estimation sessions
Lead the design and development of core features and concepts
Collaborate with Business Analysts and Operations to translate requirements
Introduce new tools and methodologies to improve productivity and quality
Deliver regular updates on development progress and releases
Plan and execute out-of-hours product deployments
Conduct code reviews and enforce development standards
Support continuous improvement and innovation within the team
Communicate effectively with stakeholders and manage expectations
Benefits:
Holidays 18 days annual leave, + 6 public holidays
Other Leave 7 days casual leave, 7 days sick leave
Development In-House Training Academy
Wellbeing Mental Health support
Onecom is the UK’s leading business communications and cloud solutions partner, trusted by over 80,000 businesses to stay connected and thrive. From household names like Farrow & Ball, Yorkshire Building Society, and Laithwaite’s Wine, to innovative SMEs and public sector organisations, we deliver technology that powers success.
We work with global leaders like Vodafone, Samsung, Apple, and Zoom, and our award-winning team is shaping the future of business connectivity.
We are committed to equity, diversity, and inclusion, and we encourage candidates to complete our equality monitoring form as part of the application process. Responses are anonymous and help inform our future initiatives.

Onecom is the UK’s leading business telecoms and cloud communications provider managing over a million services for 80,000+ business customers - delivering communication services and unified solutions across fixed-line voice, connectivity, and managed cloud.
Onecom’s customers include Farrow & Ball, Thwaites, Celtic Manor, Laithwaite’s Wine, Yorkshire Building Society and 118 UK Ltd.
Recent awards include Five9 EMEA Innovation Partner of the Year Award, ‘Best Customer Service Award’ at the Mobile News Awards; and it has been named Vodafone Strategic Partner of the Year for the last 13 consecutive years.