Jamie Sefton

Enigmatic Smile / Head of Engineering

January 2024 - Present

• Scaled the engineering organisation from start-up to scale-up, introducing leadership roles, delivery processes, and a long-term engineering roadmap.
• Built and managed cross-functional teams across Mobile, Frontend, Backend, QA, and DevOps, expanding the team with 11 new hires in 6 months.
• Implemented professional development frameworks to support career growth and retention, fostering a high-performance, learning-driven culture.
• Directed strategic and technical planning for next-generation infrastructure and services, with a focus on scalability, automation, and quality.
• Increased delivery efficiency by introducing agile processes and cross-functional collaboration, reducing cycle times and improving release predictability.
• Established a culture of engineering excellence, introducing standards for code quality, CI/CD automation, and robust QA practices.
• Partnered with business stakeholders to align engineering priorities with company strategy, enabling faster time-to-market for new products and features.

Freelance / Backend Engineer

June 2022 - Present

• Designed and implemented a comprehensive business suite covering employee management, time tracking, and payroll processing, enabling operational efficiency for SMEs.
• Developed bespoke online booking systems for both internal operations and customer-facing platforms, tailored to specific business needs.
• Built hardware integration tools connecting EPOS systems with custom game-scoring sensors, bridging software and physical devices for seamless data flow.
• Created a digital signage management platform, including scheduling, asset control, and a companion Android application to power screen displays.
• Engineered a status monitoring and alerting tool providing real-time uptime checks, performance metrics, and proactive notifications.
• Delivered custom integrations for Unify WiFi, including captive portal flows and administration dashboards, enhancing user experience and network control.
• Engaged with clients end-to-end — from requirements gathering to deployment — ensuring solutions were scalable, reliable, and aligned with business objectives.

RLDatix

January 2021 - December 2023 (3 years)

Parallax

October 2015 - January 2021 (5 years, 4 months)

LITTLE Agency / Web Developer

May 2014 - October 2015 (1 year, 6 months)

• First engineering hire, responsible for establishing the foundations of the agency’s web development offering and scaling capability for future growth.
• Designed and implemented processes, tooling, and frameworks to support efficient and repeatable bespoke website builds.
• Delivered e-commerce platforms and bespoke web solutions tailored to client needs, balancing functionality, usability, and performance.
• Played a key role in enabling the expansion of the development team by setting technical standards and onboarding practices.

Rejuvenate Productions / Web Developer

March 2012 - August 2013 (1 year, 6 months)

• Completed a placement year as part of university studies, continuing part-time thereafter due to strong performance and client impact.
• Delivered end-to-end development of bespoke websites, contributing across both frontend and backend.
• Built custom e-commerce solutions tailored to client requirements, improving usability and business efficiency.
• Gained early professional experience in client delivery, working within real-world project constraints and collaborating with designers and stakeholders.