Senior Principal Engineer
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Job Description
Senior Principal Engineer ensuring cross-team engineering principles in enterprise AI solutions development. Collaborating with leadership and engineering teams to enhance the codebase and architecture.
Responsibilities:
- Complexio is the intelligence layer for enterprise AI, closing the automation gap
- Ensure engineering teams move fast in the same direction
- Define, communicate, and continuously evolve engineering principles
- Active participation in the Operational Leadership Team (OLT)
- Serve as the senior architectural authority across all engineering teams
- Own and drive architectural design reviews and integration patterns
- Lead technical governance and decision-making processes
- Champion platform quality and engineering health across the organisation
- Define and uphold security engineering standards
- Mentor senior engineers across the organisation and contribute hands-on to the codebase
Requirements:
- 12+ years of professional software engineering experience, with a substantial portion in senior, staff, or principal engineer roles with cross-team scope
- Demonstrable experience defining and enforcing engineering standards, architectural principles, or technical governance across multiple teams or products
- Deep expertise in distributed systems design — event-driven architectures, graph data models, API design, microservices, and data pipeline patterns
- Strong command of at least one primary backend language (Python, Go, Java, or equivalent) and broad familiarity across the stack
- Hands-on experience with cloud-native infrastructure — containerisation (Docker, Kubernetes), CI/CD pipelines, infrastructure as code, and cloud platforms (AWS, Azure, or GCP)
- A proven ability to make and communicate clear, well-reasoned architectural decisions under uncertainty — and to bring teams along with you
- Experience with security engineering principles: authentication and authorisation patterns, secrets management, encryption, and enterprise compliance requirements
- Strong technical writing — able to produce standards documents, ADRs, and architecture guides that are clear, durable, and actually adopted
Benefits:
- A rare opportunity to shape the engineering culture and technical foundations of a fast-growing enterprise AI company from an early stage
- Horizontal influence across the entire engineering organisation — your decisions matter at scale
- Competitive senior compensation with equity participation aligned to Complexio's growth trajectory
- Direct access to Co-CEO product and technology leadership — decisions move fast and your input will be acted on
- A technically ambitious environment: the problems are genuinely hard, the platform is genuinely differentiated, and the engineering team is genuinely capable
- Remote-first working with a high-trust, low-bureaucracy culture
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