rynchrls / portfolio

01 — Introduction

Full-stack Developer
building apps that matter.

I design and build meaningful web and mobile applications as a full-stack developer — focusing on clean architecture, smooth user experiences, and performance-driven solutions that solve real-world problems and deliver business value.

Get in Touch
3+
Years of professional development experience
100rps
Throughput supported after backend optimization
10s → 500ms
Documented response-time improvement

"Full Stack Developer with a strong focus on backend development, passionate about building scalable and high-performance systems. Eager to tackle challenging projects, explore new technologies, and continuously grow expertise across software engineering and system design."

02 — Experience

Where I've worked.

A track record of owning backend systems, leading teams, and shipping product.

APR 2025 — MARCH 2026

Full Stack Developer | Mobile Developer

Seven365 · Singapore

  • Refactored an existing codebase improving maintainability and overall system performance.
  • Reduced backend response times from 10 seconds to 500ms — supporting up to 100 requests per second.
  • Designed and implemented scalable API endpoints across multiple services.
  • Contributed to horizontal scaling strategies for long-term system growth.
  • Integrated Entry Pass services via SOAP-based API for authentication and access management.
  • Implemented port forwarding for remote access to local development servers.
  • Implemented RSA Encryption for secure qrcode data transmission.
  • Developed cross-platform mobile applications (Android & iOS) optimized for low-end devices, ensuring smooth performance, efficient resource usage, and broad device compatibility
AUG 2023 — FEB 2025

Lead Developer

Nexacore Innovations FZCO · Austria

  • Led a team of developers in designing and delivering software solutions end-to-end.
  • Created scalable system designs and oversaw long-term application maintenance.
  • Improved code quality and streamlined development workflows across the team.
  • Facilitated Agile/Scrum ceremonies and helped the team meet sprint timelines consistently.
  • Scaled and optimized a multi-client SaaS platform; developed payment and billing integrations.

03 — Skills

My toolkit.

Everything from language-level code to cloud infrastructure.

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Languages & Frameworks

JavaScriptTypeScript PythonHTML/CSS ReactNext.jsReact Native Node.jsExpress.js FastAPITailwind ViteJest
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Databases & Dev Tools

PostgreSQLMongoDB SupabasePrisma SQLAlchemyRedis PostmanSwagger Jira
☁️

Cloud & Infrastructure

AWS EC2AWS S3 DockerCI/CD GitHub Actions VercelRender
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Architecture

Microservices Monolithic Event-Driven RESTful API SOAP API GraphQL System Design Caching Load Balancing Sharding Replication Horizontal Scaling
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Dev Practices

Agile / Scrum Database Optimization Query Optimization Indexing Port Forwarding Tunneling Reverse Proxy RSA Encryption Code Review CAP Theorem
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AI & Automation

RAG Architecture OpenAI API Gemini API Ollama n8n GoHighLevel Prompt Engineering

04 — Projects

Things I've built.

Selected work reflecting real engineering decisions and product thinking.

🚀
↗ Live

iService365 — Access Control Management Platform

Large-scale cross-platform application (web & mobile) built for property operations, security access, and hygiene service management. Developed using a shared codebase, with features including Port Forwarding, Reverse Proxy, SOAP-based Entry Pass integration, and Redis caching, ensuring efficient performance and seamless system integration.

TypeScriptNode.js React Native MongoDBSOAP API DockerAWS Redis
🤖
api ↗ app ↗

RAG Pipeline

Full-stack RAG pipeline that allows users to upload documents, chunk and index them, retrieve the most relevant context, and generate grounded responses through a chat interface.

PythonFastAPI Next.jsOllama OpenAIGemini RAG Architecture
📐
⌥ Repo

System Design Practices

A personal reference repository documenting system design concepts, architectural patterns, and trade-off analyses — covering topics like scaling, caching, sharding, replication, and distributed systems design.

ScalabilityCaching Database DesignRate Limiter Pub-Sub
🎓
↗ Live

Skillura

A SaaS platform for AI-driven hiring and training — enabling companies to assess candidates, onboard teams, and deliver structured learning paths. Built with a microservice architecture, Stripe billing integration, and scalable backend APIs.

TypeScriptReact Node.jsMongoDB Express.jsMicroservices StripeAWS Redis pub/sub

05 — Automation

Workflow automation.

Building smart, no-code/low-code pipelines that connect tools, automate processes, and drive real business results.

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n8n — Workflow Automation

Designed and deployed multi-step automation workflows using n8n, integrating webhooks, APIs, databases, and third-party services to streamline business operations without manual intervention.

Webhook Triggers HTTP Request Nodes API Integrations Conditional Logic Data Transformation Scheduled Workflows Error Handling Self-hosted n8n
🔁

GoHighLevel (GHL) — CRM & Marketing Automation

Configured and managed GHL pipelines, funnels, and automations to orchestrate lead nurturing, follow-up sequences, appointment booking, and multi-channel communication — connecting CRM data to real-time business workflows.

Pipeline & Funnel Setup Automated Follow-ups SMS / Email Sequences Appointment Booking Lead Nurturing Sub-account Management GHL API

06 — GitHub Activity

Commit history.

Live data from my public GitHub profile — rynchrls.

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contributions this year
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public repositories
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total stars earned

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07 — Contact

Let's talk.

Open to full-time roles, contract work, or a good engineering conversation.

✉️
📱
🔗
LinkedIn
View Profile
🐙
GitHub
rynchrls

Ready to build something great?

Drop me a line and let's figure it out together.

✉️ Send Email 🔗 LinkedIn 🐙 GitHub

Education

🎓
2021 — 2022

BS Computer Engineering

Technological University of the Philippines

Relevant coursework: Software Engineering, Artificial Intelligence / Machine Learning, System Design, Database Systems.