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Full Stack Engineer with 8+ years of experience building scalable, high-performance web applications across fintech, healthtech, and developer tooling. Strong focus on secure authentication, clean architecture, and scalable system design in regulated, data-intensive environments. Experienced delivering robust backend services and responsive frontend interfaces using Node.js, Python, React, Next.js, and TypeScript, including production integrations for data pipelines, analytics systems, and AI-driven features. Comfortable working independently in remote contract settings while collaborating effectively with global cross-functional teams.…Full Stack Engineer with 8+ years of experience building scalable, high-performance web applications across fintech, healthtech, and developer tooling. Strong focus on secure authentication, clean architecture, and scalable system design in regulated, data-intensive environments. Experienced delivering robust backend services and responsive frontend interfaces using Node.js, Python, React, Next.js, and TypeScript, including production integrations for data pipelines, analytics systems, and AI-driven features. Comfortable working independently in remote contract settings while collaborating effectively with global cross-functional teams.

Ronan Doyle

Full Stack Developer, Back-End Developer, Web Developer, +4

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Full Stack Engineer with 8+ years of experience building scalable, high-performance web applications across fintech, healthtech, and developer tooling. Strong focus on secure authentication, clean architecture, and scalable system design in regulated, data-intensive environments. Experienced delivering robust backend services and responsive frontend interfaces using Node.js, Python, React, Next.js, and TypeScript, including production integrations for data pipelines, analytics systems, and AI-driven features. Comfortable working independently in remote contract settings while collaborating effectively with global cross-functional teams.…Full Stack Engineer with 8+ years of experience building scalable, high-performance web applications across fintech, healthtech, and developer tooling. Strong focus on secure authentication, clean architecture, and scalable system design in regulated, data-intensive environments. Experienced delivering robust backend services and responsive frontend interfaces using Node.js, Python, React, Next.js, and TypeScript, including production integrations for data pipelines, analytics systems, and AI-driven features. Comfortable working independently in remote contract settings while collaborating effectively with global cross-functional teams.

Available to hire

Full Stack Engineer with 8+ years of experience building scalable, high-performance web applications across fintech, healthtech, and developer tooling. Strong focus on secure authentication, clean architecture, and scalable system design in regulated, data-intensive environments.

Experienced delivering robust backend services and responsive frontend interfaces using Node.js, Python, React, Next.js, and TypeScript, including production integrations for data pipelines, analytics systems, and AI-driven features. Comfortable working independently in remote contract settings while collaborating effectively with global cross-functional teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at Bank of Hope

March 1, 2023 - Present

Designed and developed scalable backend services using Node.js and TypeScript, integrated with PostgreSQL and GraphQL to optimize data modeling and queries. Developed services using Python (FastAPI) and C# for tools, handling business logic and API design for Fintech applications. Built and optimized RESTful APIs and WebSocket-based real-time communication for seamless user interactions. Integrated STT functionality for real-time voice-to-text conversion to enhance user experience. Collaborated with frontend teams to deliver high-quality, responsive UIs using React. Applied Redis caching to reduce latency and accelerate API response times by 35%. Participated in DevOps engineering to implement CI/CD pipelines using GitLab CI and Docker, improving deployment efficiency and reducing release cycles by 20%.

Senior Software Engineer at Bank of Hope

June 1, 2022 - Present

Optimized payment processing workflows using REST APIs, improving transaction throughput by 25% while ensuring financial compliance and data integrity across banking systems. Led cross-functional efforts with product, QA, and DevOps teams to deliver scalable fintech solutions. Remote role.

Software Engineer at Doccla

August 1, 2019 - May 1, 2022

Delivered secure API integrations and backend features for healthcare/telemedicine platforms, enabling HL7 v2 and FHIR interoperability and improving data exchange accuracy.

FullStack Engineer at Neko Health

August 1, 2018 - February 1, 2023

Designed and developed mobile apps and services using Node.js, React Native and Expo, integrated with PostgreSQL and GraphQL to optimize data modeling and queries. Developed end-to-end solutions for a SaaS health-tech platform using React.js, FastAPI, and PostgreSQL, delivering significant improvements in data throughput and system responsiveness. Worked on iGaming solutions, focusing on real-time performance optimizations, and developed mobile applications using React Native for Android/iOS. Contributed to AI-powered features, such as personalized content recommendations, using ML algorithms. Automated deployments with Kubernetes and CI/CD pipelines, increasing delivery speed by 50%. Ensured WCAG accessibility and improved site usability for diverse users.

Software Developer at Codacy

September 1, 2016 - July 1, 2019

Automated voice processing pipelines with role-based access control and encryption, reduced manual errors by 40% and enhanced audit logging for regulatory reporting. Implemented fraud-detection algorithms with real-time monitoring, and standardized CI/CD pipelines using Docker and Kubernetes to speed deployments by 50%. Expanded test coverage (unit/integration/E2E) to 85% and improved production reliability. Mentored junior engineers and fostered fintech best practices.

Software Developer at Zartis

September 1, 2013 - July 1, 2018

Built solutions in Node.js and Vue.js, designed and optimized RESTful APIs for data-intensive AI-powered systems. Built and optimized RESTful APIs and WebSocket-based real-time communication for seamless user interactions. Integrated AI tools to generate and test prompts, improving backend functionality and performance. Collaborated closely with frontend teams to deliver high-quality, responsive interfaces using React. Worked in Unix-based environments and startup setting, delivering rapid feature iterations to meet market demands.