Intermediate Full-Stack Developer (React/Node/AWS)

Jose Castanos

Intermediate Full Stack Developer React, TypeScript, Node.js, PostgreSQL, AWS

Calgary, AB (Open to Remote / Hybrid) 1-825-***-**** ********@**.** Portfolio GitHub LinkedIn PROFESSIONAL SUMMARY

Full Stack Developer with 4+ years of experience building scalable web applications, RESTful APIs, and cloud- based systems using React, TypeScript, Node.js, and PostgreSQL. Experienced in Agile environments, CI/CD workflows, test-driven development, and performance optimization. Comfortable collaborating with researchers, technical leads, and cross-functional stakeholders to translate complex requirements into reliable, maintainable software. Founder of hi faro (web studio) and The Shine Drop (service platform), where I build, deploy, and operate production systems end-to-end including payment processing with Stripe and AI-driven automation via an OpenClaw virtual assistant.

TECHNICAL SKILLS

Languages: TypeScript, JavaScript (ES6+), Node.js, SQL, HTML5, CSS3 Front-End: React, Next.js, Redux, TailwindCSS, MaterialUI, Three.js (Basic) Back-End / APIs: Express, Ruby on Rails, REST, GraphQL, Serverless Framework Databases: PostgreSQL, MySQL, MongoDB, Neon (Serverless PostgreSQL), SQL, NoSQL Cloud & DevOps: AWS (Lambda, SQS, API Gateway, EventBridge, Step Functions, STS, S3), Docker (Basic), Vercel, CI/CD pipelines, Git (GitHub)

Testing & QA: Vitest, React Testing Library, test-driven development (TDD), structured code reviews, performance profiling, debugging

AI / Tooling: Claude Code, OpenAI API, Gemini, OpenClaw (AI agent automation), v0, VSCode, Linear, Storybook

Commerce / Payments: Stripe API, Shopify, Airtable, Contentful, Sanity, Twilio Power Platform: Power BI Desktop/Service, Power Apps (Canvas), Direct Query, ETL pipelines PROFESSIONAL EXPERIENCE

Software Developer 09/2025 - Present Calgary, AB Hybrid Consulting Firm

• Built web scrapers to access, parse, and store structured data from third-party platforms, enabling real-time data pipelines for client reporting.

• Supported clients in consolidating and archiving data from legacy systems into Azure, ensuring data integrity and continuity throughout the transition.

• Designed and developed interactive data visualisation applications and Power BI reporting dashboards using Direct Query for live analytics.

• Collaborated directly with stakeholders and technical leads to translate business requirements into end-to- end technical solutions across multiple concurrent projects. Software Developer 04/2024 - 08/2025 Montreal, QC Remote E-Commerce Platform

• Delivered new product launches on high-traffic Canadian and U.S. e-commerce platforms, achieving 100% on-time delivery with measurable revenue lift.

• Engineered a SKU generation pipeline producing 10,000+ SKUs per product launch; reduced script execution time from ~30 minutes to 90 seconds through concurrent processing strategies.

• Built and maintained serverless backend functions using AWS Lambda, SQS, and API Gateway to handle high-volume commerce events following event-driven architecture patterns.

• Maintained and extended Node.js services powering Shopify storefront integrations with secure, performant REST API patterns.

Front-End Developer 12/2022 - 04/2024 Dallas, TX Remote Software Agency

• Increased user engagement by 25% developing accessible, performant React web applications with a focus on UX and secure coding standards.

• Improved application loading times by 35% through code-splitting, lazy loading, and asset optimisation across 4+ concurrent client projects.

• Integrated third-party APIs and external services across multiple client engagements, delivering reliable, well-tested data connections between systems.

• Coordinated with stakeholders through the full project lifecycle to gather requirements, determine solutions, and demonstrate functionality.

Code Reviewer & Mentor 04/2022 - 11/2022 Remote

Microverse

• Conducted structured code reviews for full-stack engineering students, enforcing quality assurance, secure coding, and best practices.

• Mentored junior engineers on software development standards, debugging strategies, and integration methodologies.

Postgraduate Teaching Assistant 10/2019 - 08/2021 London, UK University College London (UCL)

• Improved student comprehension of complex engineering concepts by 15% through small-group tutorials and targeted feedback.

• Boosted course effectiveness by 20% collaborating with faculty to align teaching materials with curriculum objectives.

BIM Project Engineer 06/2018 - 09/2019 Mexico City, MX Engineering Firm

• Digitised and modelled commercial infrastructure projects using BIM methodologies, saving 20% in project delivery time.

• Coordinated across cross-functional teams of engineers, designers, and stakeholders to deliver large-scale, end-to-end projects.

NOTABLE PROJECTS

• hi faro - Web studio helping small to medium businesses build performant web presences and grow organic traffic through SEO strategy and execution. Next.js, TailwindCSS, Contentful, Sanity.

• XcelPal - Amazon data connector bringing live marketplace data into Excel. Excel Add-in (TypeScript, React), web dashboard, and fully serverless AWS backend (Lambda, STS, SQS, Step Functions, EventBridge, API Gateway). Sales and inventory insights with real-time data pipelines.

• OpenClaw AI Virtual Assistant - Automated business logistics and repetitive workflows using a custom OpenClaw agent. Handles invoice generation, client notifications, and automated review requests, reducing manual overhead for a live service business.

• The Shine Drop - Leather care studio web app with online booking, service management, Stripe payment integration, and customer communication via Twilio. Built with Next.js, TailwindCSS, and Airtable.

• RP-1 Bookings - SMS marketing automation with end-to-end serverless architecture for high-throughput campaigns. React, Redux, AWS, MongoDB, Twilio, Kafka, RabbitMQ.

• YYCHacks 2024 - AI-enhanced tourist tours app helping newcomers navigate Calgary. TypeScript, React, ElevenLabs API, Google Maps API.

EDUCATION

Full Stack Development Program Microverse, San Francisco, CA (Remote) 1,300+ hours of project-based full-stack engineering covering algorithms, data structures, and cross-timezone pair programming.

Postgraduate Engineering University College London (UCL), London, UK Building Performance Simulation, Digital Twins (BIM), Semantic Web Technologies (RDF, SPARQL, Ontologies), functional programming.

M.S. in Design (Honours, 3.8 GPA) UAM, Mexico City B.Eng. in Mechanical Engineering TECNM, Mexico

CERTIFICATIONS

• Coding Assistant: Claude Code in Action - Anthropic

• Prompt Engineering & Advanced ChatGPT - edX

• Relational Databases & SQL - Stanford University / edX

• Advanced Topics in SQL - Stanford University / edX

• Web Performance Fundamentals v2

• MSSQL - The Knowlton Group, LLC

• Full list on request

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