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Othniel Onyx

@othnielonyx

Technology Lead at GEMSTONES Montessori Schools who automated admissions, grading, and reporting workflows, reducing manual paperwork by 64.7%.

United Kingdom

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What I'm looking for

I’m open to full-stack development, IT, and cybersecurity roles.

At GEMSTONES Montessori Schools, I deliver technology tools and fixes across a multi-site organisation, from understanding the problem through to a working solution. I built and maintain the school website using React.js, Node.js, and PostgreSQL.

I automated admissions, grading, and reporting workflows with custom scripts and web forms, cutting manual paperwork by 64.7%. I also own access control, encryption, and backup protocols for sensitive student and staff information.

At TOUCH, I built responsive React interfaces for client websites and web applications, integrating dynamic data through REST APIs. I delivered 6+ web solutions for clients, improving page load times by 20%.

My cybersecurity work includes a threat investigation tool for my MSc dissertation, covering evidence hashing, rule-based IOC extraction, and MITRE ATT&CK cross-referencing. I’ve also completed 25 hands-on SOC learning modules, investigating simulated alerts and analysing Windows Event Logs and network logs.

Experience

Work history, roles, and key accomplishments

Current

Technology Lead

Current

GEMSTONES Montessori Schools

Jan 2023 - Present (3 years 10 months)

Responsible for technology across a multi-site school organisation, delivering tools and fixes from problem understanding to working solutions. Built and maintained the school website using React.js, Node.js, and PostgreSQL, and automated admissions, grading, and reporting workflows, cutting manual paperwork by 64.7%.

React NodeJS PostgreSQL RBAC Encryption Protocols Documentation

Frontend Developer

TOUCH

Sep 2023 - Jul 2024 (10 months)

Built responsive React interfaces for client websites and web applications, integrating dynamic data through REST APIs. Delivered 6+ web solutions, improving page load times by 20% and overall client satisfaction.

React REST APIs Responsive Design Web Development

Full-Stack Developer

WHITECROFT

Mar 2022 - Jun 2023 (1 year 3 months)

Developed full-stack applications using Node.js, Express, React, and MongoDB, covering both interface and backend. Completed 10+ custom software solutions and optimised backend performance by 30%.

NodeJS Express React MongoDB Fullstack Development Performance Optimization

SOC Analyst Learning Path

LetsDefend

Completed 25 hands-on modules covering SIEM workflows, threat detection, and incident investigation. Triaged simulated alerts for phishing, malware, brute-force, and web attacks, and analysed Windows Event Logs and network logs to identify indicators of compromise.

SIEM Threat Detection incident investigation MITRE ATT&CK Cyber Kill Chain Windows Event Logs Network Logs