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Hi, I'm Jonathan Manning, a Senior Full-Stack Developer with over 8 years' experience creating scalable and high-performance web applications. I specialize in Node.js along with modern frontend frameworks like React.js and Vue.js. I'm passionate about writing clean code, optimizing performance, and building intuitive, accessible user interfaces. Throughout my career, I've designed secure RESTful APIs, integrated third-party services, and deployed applications to cloud platforms such as AWS. I enjoy working in agile environments where I can collaborate, mentor junior developers, and continuously improve software quality through test-driven development and robust CI/CD pipelines.…Hi, I'm Jonathan Manning, a Senior Full-Stack Developer with over 8 years' experience creating scalable and high-performance web applications. I specialize in Node.js along with modern frontend frameworks like React.js and Vue.js. I'm passionate about writing clean code, optimizing performance, and building intuitive, accessible user interfaces. Throughout my career, I've designed secure RESTful APIs, integrated third-party services, and deployed applications to cloud platforms such as AWS. I enjoy working in agile environments where I can collaborate, mentor junior developers, and continuously improve software quality through test-driven development and robust CI/CD pipelines.

Jonathan Manning

Full Stack Developer, Developer, Back-End Developer, +2

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Hi, I'm Jonathan Manning, a Senior Full-Stack Developer with over 8 years' experience creating scalable and high-performance web applications. I specialize in Node.js along with modern frontend frameworks like React.js and Vue.js. I'm passionate about writing clean code, optimizing performance, and building intuitive, accessible user interfaces. Throughout my career, I've designed secure RESTful APIs, integrated third-party services, and deployed applications to cloud platforms such as AWS. I enjoy working in agile environments where I can collaborate, mentor junior developers, and continuously improve software quality through test-driven development and robust CI/CD pipelines.…Hi, I'm Jonathan Manning, a Senior Full-Stack Developer with over 8 years' experience creating scalable and high-performance web applications. I specialize in Node.js along with modern frontend frameworks like React.js and Vue.js. I'm passionate about writing clean code, optimizing performance, and building intuitive, accessible user interfaces. Throughout my career, I've designed secure RESTful APIs, integrated third-party services, and deployed applications to cloud platforms such as AWS. I enjoy working in agile environments where I can collaborate, mentor junior developers, and continuously improve software quality through test-driven development and robust CI/CD pipelines.

Available to hire

Hi, I’m Jonathan Manning, a Senior Full-Stack Developer with over 8 years’ experience creating scalable and high-performance web applications. I specialize in Node.js along with modern frontend frameworks like React.js and Vue.js. I’m passionate about writing clean code, optimizing performance, and building intuitive, accessible user interfaces.

Throughout my career, I’ve designed secure RESTful APIs, integrated third-party services, and deployed applications to cloud platforms such as AWS. I enjoy working in agile environments where I can collaborate, mentor junior developers, and continuously improve software quality through test-driven development and robust CI/CD pipelines.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Full-Stack Developer at Creatif Agency

June 1, 2024 - June 30, 2025

Architected an intelligence platform using Node.js and React.js, ensuring modular and scalable architecture. Designed and implemented secure, scalable RESTful APIs integrated with OAuth2 for third-party data providers. Built enterprise-level authentication with JWT, role-based access control (RBAC), and secure session handling. Refactored large models into service objects, form objects, and concerns, increasing code maintainability. Tuned complex PostgreSQL queries and added indexing strategies that improved performance by over 30%. Automated deployments using GitHub Actions, Docker, and staging environments, enabling zero-downtime CI/CD. Applied unit testing and integration testing improving coverage to over 85%. Conducted in-depth code reviews, enforced test-driven development (TDD), and maintained 90%+ code coverage with RSpec. Mentored junior developers and built internal onboarding documentation to scale engineering knowledge.

Full-Stack Engineer at Grab Holdings Inc

November 1, 2020 - May 31, 2024

Built full-stack internal tools and dashboards using Node.js, Express, and Next.js, enabling clients in logistics and manufacturing to analyze operational data and improve efficiency. Developed dynamic charts and data visualizations using D3.js and Chart.js, delivering actionable insights to end-users. Improved form performance by optimizing state management and using memoized selectors with Redux Toolkit. Automated deployments using Docker Compose, Ansible, and AWS EC2/S3 for production environments. Refactored monolithic legacy code into a microservice architecture with FastAPI and gRPC-based communication. Managed deployments using Heroku, introduced Review Apps, and monitored performance using Skylight and New Relic. Developed RESTful APIs to support mobile apps and third-party education platforms. Implemented data caching with Redis to reduce page load times and server resource usage. Participated in Agile sprints, maintained technical documentation in Notion, and conducted weekly

Full-Stack Developer at Tab Next Limited

February 1, 2018 - November 1, 2020

Developed and maintained a full-stack telemedicine platform using Node.js and React.js, enabling secure, real-time connections between thousands of patients and healthcare providers. Designed a role-based access system and integrated JWT authentication for patient and doctor portals. Built scalable REST APIs for appointment booking, notifications, and medical records, with optimized PostgreSQL queries. Created a real-time chat and video consultation system using WebSockets, Twilio, and WebRTC. Introduced GitLab CI, Docker, and multi-stage deployments for testing, staging, and production pipelines. Implemented CI/CD pipelines via GitHub Actions and containerized services with Docker and AWS ECS. Reduced average response time by 40% through API refactoring and database indexing. Participated in regular security audits, ensuring adherence to HIPAA and GDPR standards.