Narrarts
A web product featured in my Upwork portfolio, representing experience with application architecture, UI and delivery.
AVAILABLE FOR SELECTED PROJECTS / REMOTE
Full-Stack Engineer · AI Integration Engineer
I build the new.
I fix the old.
A hands-on full-stack engineer and technical lead working with systems that have history — and products that need a future.
ROOT ACCESS TO THE PROBLEM. NOT TO YOUR PRODUCTION SERVER.
phil.on@work:~$ whoami
phil.on / Full-Stack Engineer + Technical Lead
// Web development since 2013
phil.on@work:~$ ls expertise/
rails/ node/ web/ mobile/ ai/ crm/
Type help and press Enter.
Try a command: / /
TERMINAL IS LIVE ↖01 / WHAT I DOFOUR WAYS TO GET THINGS DONE.
A useful engineer for complicated things.
From old codebases that need care to new products that need to exist. I take responsibility for the messy middle: architecture, implementation, testing and release.
01.
Legacy upgrades & modernization
Rails, Ruby, Node.js, Django and React upgrades. Dependency conflicts, breaking APIs, production risk and incremental migrations.
02.
AI products & RAG systems
Practical LLM features: document ingestion, retrieval, context assembly, source attribution and evaluation.
03.
Full-stack web applications
Backend services, APIs, frontend experiences and application integrations, from first build to long-term maintenance.
04.
Mobile apps & delivery
React Native, Android and iOS workflows, API integration, reliability and end-to-end product delivery.
02 / SELECTED PRODUCTSThe products.
PUBLISHED UPWORK ENTRIES
The products.
Not just the code.
Selected products from my published portfolio. Detailed technical contributions can be provided on request.
INDEX / PROJECTSEXPAND TO READ CONTEXT
Narrarts Mobile
Mobile experience from the same product family, listed as a separate portfolio entry.
TriNet Hire
Another published product entry illustrating the range of interfaces and platforms in my background.
03 / ENGINEERING CASEBOOKBEFORE / AFTER ENGINEERING
What changes under the hood.
These are examples of how I think about problems, implementation and target outcomes. Choose a scenario to explore the steps.
SYSTEM MODERNIZATION / EXAMPLE WORKFLOW
An aging Rails app deserves a safer future.
A major version upgrade is not a single command. The hard part is moving real business workflows across compatibility boundaries.
Illustrative workflow: Example workflow, not a result attributed to a named project.
● engineering / transformation.diffBEFORE → AFTER
BEFORE / STATE
Old dependencies. Fragile changes.
- Outdated Ruby / Rails versions
- Conflicting or abandoned gems
- Patchy regression coverage
- Manual, risky deployments
AFTER / TARGET
Supportable. Testable. Releasable.
- Supported versions and compatible gems
- Breaking changes fixed intentionally
- Critical workflows validated in tests
- Staged rollout and rollback plan
Evidence level: Illustrative, not a project claim
04 / AI & BUSINESS SYSTEMSPractical AI.
Practical AI.
Connected to your business.
Alongside frontend and full-stack development, I integrate AI into the applications and workflows teams use every day.
01 / INTEGRATION EXPERIENCE
AI Chatbot Integration
Integrated AI-powered chatbots into business applications, connecting conversational interfaces with existing systems and operational workflows.
02 / INTEGRATION EXPERIENCE
AI-Enhanced CRM Workflows
Implemented AI capabilities within CRM systems to help businesses streamline repetitive processes and improve customer-data workflows.
ENGINEERING / DESIGN REFERENCE
RAG that earns trust.
Useful AI takes more than an API call: retrieval rules, source attribution, permission boundaries and evaluation.
01 /IngestDOCUMENTS
CHUNKS
EMBEDDINGS
CHUNKS
EMBEDDINGS
02 /RetrieveQUERY
AUTHORIZATION
RERANKING
AUTHORIZATION
RERANKING
03 /GeneratePROMPT
CONTEXT
CITATIONS
CONTEXT
CITATIONS
04 /EvaluateQUALITY
COVERAGE
FEEDBACK
COVERAGE
FEEDBACK
ARCHITECTURE SKETCH / DESIGN REFERENCE — NOT A VERIFIED CLIENT DEPLOYMENT
05 / THE HUMAN BEHIND ITYears in the code.
Years in the code.
Perspective beyond it.
Senior engineering is judgment built by shipping, maintaining and supporting products over time.
Hands-on by default.
Lead when it matters.
Web development since 2013, with technical leadership experience since 2016. Hands-on when it matters.
WEB DEVELOPMENT / SINCE 2013
TECH LEADERSHIP / SINCE 2016
TECH LEADERSHIP / SINCE 2016
2016-Now
Fullstack Engineer - AI integration engineer
CP TechI'm a Senior Full-Stack Engineer and Technical Lead with over 10 years of experience designing, building, and maintaining scalable web and mobile applications. My expertise spans Ruby on Rails, Python/Django, Node.js, React, React Native, PostgreSQL, and AWS, with a strong focus on system architecture, performance optimization, legacy modernization, and production-ready solutions. I also specialize in AI-powered applications, LLM integration, Retrieval-Augmented Generation (RAG), AI agents, and intelligent automation, helping businesses integrate AI capabilities into real-world products and workflows. As a hands-on engineer and technical leader, I work across the entire development lifecycle—from architecture and implementation to deployment, optimization, and long-term maintenance. I help businesses build modern applications, upgrade legacy systems, and turn AI ideas into practical, reliable software.
WORKING STACK →
Ruby on RailsRubyPython / DjangoNode.jsReactReact NativeLLM / RAGPostgreSQLAWSAPI IntegrationTestingCI / CD
07 / START A CONVERSATION
Got a system that’s stuck?
Old Rails app? Unreliable Node service? AI with difficult data? Or a web/mobile product to build? Bring the problem.