Principal Software Engineer - (.Net, PHP, Umbraco, Drupal)
TPXImpact Holdings PLC
Overview
As a Principal Engineer, you provide senior technical leadership across client estates, shaping architectures, guiding complex projects and resolving high-stakes issues. You move across platforms and codebases, upholding technical authority in .NET/Umbraco and PHP/Drupal, with cloud and hosting layers. You translate opportunities into design, steer large implementations, and establish confidence during critical moments. This role lets you influence outcomes for mission-driven clients while elevating engineering standards.
Responsibilities- Provide technical authority across client estates spanning multiple platforms and codebases.
- Shape technical solutions from discovery through design and estimation for new business.
- Lead architecture on large, complex client projects.
- Serve as senior technical escalation point for live incidents across stacks.
- Raise engineering standards via mentorship, reviews, and governance.
- Represent the organisation credibly to senior technical stakeholders.
- Cross-stack technical depth across .NET/Umbraco and PHP/Drupal
- Architectural leadership for robust, scalable, secure content-managed platforms
- Hands-on cloud experience (Azure) with CI/CD, infrastructure as code, hosting environments
- Diagnostic ability under pressure to explore unfamiliar codebases
- Pre-sales and technical discovery experience including solution design and estimation
- Software engineering fundamentals: clean code, testing, design patterns, security, accessibility
- Leadership and mentorship with focus on elevating others
- Commercial awareness and clear communication with non-technical stakeholders
- Calm under pressure
- Pragmatic decision-making
- Clear, confident communication
- Umbraco and .NET
- Drupal and PHP
- Azure cloud, CI/CD, infrastructure as code
Reference: WJ-747_30180182