Geraint Guan
I build products and features end-to-end, working closely across all functions of a company to not just build solid technical code and architecture, but ensure we're building things that actually solve end-user problems. I focus on outcomes and quick iteration/experimentation over rigid processes and protracted waterfall planning.
Highlighted Achievements
Led a team to deliver a mobile app and associated backend infrastructure for a £500K+ client project in a complex partnership and regulatory environment.
Helped close a £200K+ contract by working closely with client and partner to build and deliver a companion web-view based app on the partner's platform.
Reduced infrastructure costs by over 20% and reduced scaling-related incidents by 100% by proactively migrating a core service to a serverless architecture.
Experience
Leverage Claude Code and Claude Design in conjunction with my deep technical expertise to independently build key product features end-to-end, including a new minutes editor with collaboration features as well as generating and surfacing citations for generated minutes content to users.
Built key internal tooling end-to-end including full tracing for LLM jobs and a minutes evaluator tool with LLM-as-a-judge evaluators, used by both technical and non-technical internal users.
Completed impactful discovery work and delivered a mobile app with associated backend infrastructure for a complex £500K+ client project operating in a complex and highly regulated environment.
Independently designed and documented a technical architecture with complex enterprise security requirements and with bi-directional communication with a partner's platform.
Supported with user story mapping, technical workshops, and technical governance meetings with client.
Led a team of 3 engineers of various experience levels.
Supported with hiring activities for design and engineering team.
Improved internal system stability and built out new internal tooling to improve engineering and commercial team productivity by restructuring engineering team to establish and lead a new DevOps team.
Significantly reduced customer-reported defects by implementing Sentry with internal PII scrubbing.
Led several critical projects to maintain key client relationships and revenue streams including integrating Adyen as a new payment provider and building a companion web-view app and integration with a key partner's mobile app and platform.
Advised leadership team with technical insight and participated in product strategy planning.
Worked with product team to investigate and resolve product questions and defects.
Worked with commercial team for prospective and existing clients.
Worked with partnerships team to secure and maintain key partners.
Supported with hiring activities for design and engineering team.
Collaborated cross-functionally across entire company to write project scopes and implemented key product features, including a new Zapier integration and support for SAML authentication.
Significantly improved developer productivity by researching and implementing new technologies including GitHub Actions, AWS EventBridge, and tRPC.
Line managed a team of 2-3 engineers of different experience levels.
Advised leadership team with technical insight and participated in product strategy planning.
Wrote product feature pitches as part of Shape Up methodology.
Worked with commercial team with closing new clients and supporting existing clients.
Supported with hiring activities for design and engineering team.
Collaborated cross-functionally across entire company to write project scopes and implemented key product features, including a new booking rescheduling widget and a completely overhauled resource scheduling system.
Significantly improved developer productivity by researching and implementing new technologies including TypeScript, React, AWS CDK, and AWS Lambda.
Advised leadership team with technical insight and participated in product strategy planning.
Worked with commercial team with closing new clients and supporting existing clients.
Created new hiring process for engineering team and supported with hiring activities.
Delivered key product features including the ability to import customers via CSV and a complete rewrite of the core booking engine from legacy code.
Handled customer support queries, investigated product defects, and implemented fixes.
Skills
Selected Projects
Education
2012 — 2016