Ryan King

About me

I'm a senior full-stack software developer with over ten years of experience across the whole software lifecycle: requirements analysis, system design and architecture, front-end and back-end development, APIs, database design, authentication, automated testing, deployment, monitoring and production support.

In recent years I've focused on AI and generative AI. I integrate LLMs and the OpenAI API into real products, design prompt-driven and agent-style workflows, and make AI features reliable in production with structured outputs, response validation and careful error handling.

I've worked remotely for teams in the United States and Germany, and on-site in the United Kingdom.

RoleSenior Full-Stack Developer
Experience10+ years
Based inCzech Republic
Work styleRemote
LanguagesEnglish (fluent)

Skills

Languages

JavaScript
TypeScript
PHP
Python
Java
Rust
Go
C#
SQL
HTML5
CSS3

Front end

React
Next.js
Vue.js
Nuxt.js
Angular
Tailwind CSS
Responsive design
Accessibility
State management

Back end

Node.js
Express.js
Laravel
Django
.NET
ASP.NET Core
Ruby on Rails
REST APIs
Microservices
Authentication & authorization

AI & generative AI

LLM integration
OpenAI API
Prompt engineering
AI agents
Conversational AI
Structured outputs
Context management
AI automation

Databases

PostgreSQL
MySQL
MongoDB
Redis
Data modeling
Query optimization
Indexing

Cloud & DevOps

AWS
Docker
Linux
CI/CD
Git
GitHub
Deployment automation

Testing & quality

Unit testing
Integration testing
API testing
Regression testing
Code review
Debugging

Engineering practices

System design
Software architecture
SOLID
Design patterns
Clean code
Agile/Scrum
Technical documentation

Experience

Senior Full-Stack Developer

Jan 2021 – May 2026

Northbridge Digital Ltd · United States · Remote

Designed, built and maintained scalable full-stack web applications with React, TypeScript, Next.js, Node.js, Python, Java, C#, .NET, PHP, Laravel and ASP.NET Core.
Architected RESTful APIs, microservices, authentication and authorization systems, database schemas and third-party integrations.
Built AI-powered features with LLM APIs and the OpenAI API, including conversational AI, intelligent data processing, content generation and AI-assisted workflows.
Developed agent-style workflows that connect user requests with application services, business rules, external APIs and data sources to automate multi-step processes.
Made AI features production-ready by addressing reliability, latency, validation, security and scalability, using structured outputs and response validation.
Optimized PostgreSQL queries, API processing, front-end rendering and back-end services to improve performance.
Designed and maintained CI/CD pipelines and Docker-based environments, and deployed and supported applications on AWS and Linux.
Reduced technical debt through refactoring, reusable components and architectural improvements, and led root-cause analysis of production incidents.

Back-End Developer

Jan 2018 – Dec 2020

Cedar Stack Solutions · Germany · Remote

Developed and maintained scalable back-end services and RESTful APIs with Node.js, Python and SQL.
Designed API endpoints, business logic, data models, authentication, authorization, validation and external service integrations.
Designed and optimized PostgreSQL and MySQL databases, including schema design, indexing and query tuning to improve API response times.
Wrote unit, integration, API and regression tests to raise back-end quality and reduce recurring defects.
Worked with Git, Docker, Linux and CI/CD, and partnered with front-end developers and QA to define API contracts and ship complete features.

Front-End Developer

Aug 2015 – Dec 2017

Harborline Systems · Birmingham, United Kingdom

Built responsive, accessible web applications with JavaScript, React, HTML5 and CSS3 using a reusable component architecture.
Turned business requirements, wireframes and UI designs into cross-browser-compatible interfaces.
Implemented client-side functionality, form validation and REST API integrations for data-driven features.
Improved front-end performance through component optimization, efficient rendering and asset optimization.

Selected projects

AI-Powered Full-Stack Application

A full-stack application with conversational AI, intelligent content generation, automated data processing and AI-assisted workflows built on the OpenAI API and other LLM services.

AI orchestration services linking LLMs with REST APIs, databases, authentication and business logic.
Agent-style workflows that coordinate multiple application operations and external API calls.
Structured prompts, context management and validation of AI responses for production reliability.
Responsive React and Next.js interfaces, with automated tests, Docker and CI/CD.

React
Next.js
TypeScript
Node.js
Python
PostgreSQL
OpenAI API

API-Driven Web Project

A full-stack web application with reusable front-end components and scalable back-end API services, built with a clear separation of responsibilities.

Authentication, authorization, database integration, API validation and error handling.
Third-party API integrations.
Optimized SQL queries for faster back-end responses.
Automated testing, API documentation, Docker-based development and CI/CD.

Next.js
React
TypeScript
Node.js
PHP
Laravel
PostgreSQL
REST APIs

Education & certifications

BSc (Hons) Computer Science

University of Central Lancashire · Preston, United Kingdom

Apr 2010 – Jun 2015

Coursework: Software Engineering, Web Development, Databases, Algorithms, Computer Systems and Application Development.

Professional Web Development Certificate

freeCodeCamp

2018

Get in touch

I'm open to senior full-stack and AI engineering roles. If you have an opportunity or a project in mind, send me an email.

ryanking.coder@gmail.com github.com/ryankingcoders