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Hello, I'm Efe Alicia O, a highly motivated and detail-oriented Software Engineer (Developer) based in London. I design, develop and maintain responsive, accessible web applications and am eager to grow across all areas of software development.\n\nI specialize in JavaScript (ES6+), HTML5, CSS3, TypeScript, SQL and have familiarity with React, Git, RESTful APIs and cross-browser compatibility. I thrive in Agile teams, meet deadlines, and enjoy learning new tools and deployment practices. I'm quick to pick up cloud platforms and love building scalable, user-friendly experiences.…Hello, I'm Efe Alicia O, a highly motivated and detail-oriented Software Engineer (Developer) based in London. I design, develop and maintain responsive, accessible web applications and am eager to grow across all areas of software development.\n\nI specialize in JavaScript (ES6+), HTML5, CSS3, TypeScript, SQL and have familiarity with React, Git, RESTful APIs and cross-browser compatibility. I thrive in Agile teams, meet deadlines, and enjoy learning new tools and deployment practices. I'm quick to pick up cloud platforms and love building scalable, user-friendly experiences.

Efe Alicia O

Front-End Developer, Back-End Developer, Web Developer, +3

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Hello, I'm Efe Alicia O, a highly motivated and detail-oriented Software Engineer (Developer) based in London. I design, develop and maintain responsive, accessible web applications and am eager to grow across all areas of software development.\n\nI specialize in JavaScript (ES6+), HTML5, CSS3, TypeScript, SQL and have familiarity with React, Git, RESTful APIs and cross-browser compatibility. I thrive in Agile teams, meet deadlines, and enjoy learning new tools and deployment practices. I'm quick to pick up cloud platforms and love building scalable, user-friendly experiences.…Hello, I'm Efe Alicia O, a highly motivated and detail-oriented Software Engineer (Developer) based in London. I design, develop and maintain responsive, accessible web applications and am eager to grow across all areas of software development.\n\nI specialize in JavaScript (ES6+), HTML5, CSS3, TypeScript, SQL and have familiarity with React, Git, RESTful APIs and cross-browser compatibility. I thrive in Agile teams, meet deadlines, and enjoy learning new tools and deployment practices. I'm quick to pick up cloud platforms and love building scalable, user-friendly experiences.

Available to hire

Hello, I’m Efe Alicia O, a highly motivated and detail-oriented Software Engineer (Developer) based in London. I design, develop and maintain responsive, accessible web applications and am eager to grow across all areas of software development.\n\nI specialize in JavaScript (ES6+), HTML5, CSS3, TypeScript, SQL and have familiarity with React, Git, RESTful APIs and cross-browser compatibility. I thrive in Agile teams, meet deadlines, and enjoy learning new tools and deployment practices. I’m quick to pick up cloud platforms and love building scalable, user-friendly experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Software Engineer at Babylon Health

June 1, 2024 - June 1, 2025

Contributed to the development of responsive web applications for patients and clinicians using JavaScript (ES6+), HTML5, CSS, SQL, TypeScript and React; collaborated with back-end engineers and design teams to ensure API data consistency and deliver seamless cross-platform experiences. Supported onboarding flow, integrated API data and optimized responsiveness, which reduced drop-off and improved engagement for 10,000+ monthly users. Implemented RESTful API integrations and worked with SQL to query, structure and visualise data for real-time insights. Led UI improvements for accessibility and participated in code reviews, debugging and testing within an agile workflow.

Freelance Software Engineer (Front-End Developer) at Data Annotation Tech

July 1, 2025 - December 1, 2025

Developed front-end interfaces for a data annotation platform used by 50+ annotators, building interactive components with JavaScript, HTML5 and CSS3; integrated RESTful APIs and automated data pipelines to handle 100,000+ records per month. Collaborated with product teams to design annotation features that maintained 98% data quality for AI model training and optimised platform performance for up to 200 concurrent users. Conducted testing, debugging and iterative improvements to reduce downtime by 40% over six months.

Junior Chemical Engineer at Thomas Swan & Co. Ltd.

April 1, 2023 - April 1, 2024

Supported process optimisation projects, analysing plant data and contributing to efficiency improvements of 10–15% across batch and continuous operations. Created and maintained detailed process flow diagrams (PFDs) and documentation, improving clarity for internal teams. Used Microsoft Excel and data analysis tools to interpret performance trends, troubleshoot deviations, and recommend actionable improvements.

Frontend Developer / Freelance Software Engineer at Data Annotation Tech

July 1, 2025 - December 1, 2025

Developed front-end interfaces for a data annotation platform used by 50+ annotators; built interactive components with JavaScript, HTML5 and CSS3; integrated RESTful APIs and automated data pipelines to handle 100,000+ records per month; collaborated with product teams to design annotation features maintaining 98% data quality for AI model training; optimized platform performance across desktop and mobile, supporting up to 200 concurrent users; conducted testing, debugging, and iterative improvements, reducing platform downtime by 40% over six months.