Hello! I'm Jeremias, a senior software engineer with 10+ years of experience building end-to-end production systems. I work across the stack—from React-based frontends to C#/.NET and Python backends—and I design cloud-native AWS infrastructures and AI-powered pipelines that scale. I thrive on turning complex requirements into robust, maintainable software and collaborating with product teams to deliver impactful solutions across fintech, healthcare, and ecommerce. Hi, I value clean architecture, security by design, and rigorous engineering standards, including RBAC, domain-driven design, and CI/CD-enforced delivery. I enjoy mentoring teammates and driving architectures that balance performance, security, and long-term maintainability.…

Jeremias Samson Gensaya

PRO

Hello! I'm Jeremias, a senior software engineer with 10+ years of experience building end-to-end production systems. I work across the stack—from React-based frontends to C#/.NET and Python backends—and I design cloud-native AWS infrastructures and AI-powered pipelines that scale. I thrive on turning complex requirements into robust, maintainable software and collaborating with product teams to deliver impactful solutions across fintech, healthcare, and ecommerce. Hi, I value clean architecture, security by design, and rigorous engineering standards, including RBAC, domain-driven design, and CI/CD-enforced delivery. I enjoy mentoring teammates and driving architectures that balance performance, security, and long-term maintainability.…

Available to hire

Hello! I’m Jeremias, a senior software engineer with 10+ years of experience building end-to-end production systems. I work across the stack—from React-based frontends to C#/.NET and Python backends—and I design cloud-native AWS infrastructures and AI-powered pipelines that scale. I thrive on turning complex requirements into robust, maintainable software and collaborating with product teams to deliver impactful solutions across fintech, healthcare, and ecommerce.
Hi, I value clean architecture, security by design, and rigorous engineering standards, including RBAC, domain-driven design, and CI/CD-enforced delivery. I enjoy mentoring teammates and driving architectures that balance performance, security, and long-term maintainability.

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Skills

Experience Level

React JS
Expert
C#
Expert
.NET
Expert
Tailwind
Expert
Python
Expert
ASP.NET
Expert
Django
Expert
Docker
Expert
JavaScript
Expert
TypeScript
Expert
PostgreSQL
Expert
Node.js
Expert
MySQL
Expert
AWS
Expert
React Native
Expert
MongoDB
Expert
Flutter
Expert
SQL
Expert
GraphQL
Expert
Redis
Expert
Kubernetes
Intermediate
Jira
Intermediate
Azure
Intermediate
AngularJS
Intermediate
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Language

English
Fluent

Work Experience

Senior Full-Stack Developer at BizLab IT Solutions
April 1, 2022 - December 1, 2025
Led full-stack architecture and development of scalable SaaS web, mobile, and AI platforms serving tens of thousands of users across fintech, healthcare, and ecommerce domains. Backend (Primary — C#/.NET): Designed and developed enterprise-grade REST APIs, business logic layers, and microservices using ASP.NET / C# (.NET) with Entity Framework; implemented secure authentication flows (JWT, OAuth 2.0, RBAC) and real-time WebSocket services. Backend (Secondary — Python/Django): Built Python-based automation services and Django REST APIs for workflow automation, data processing pipelines, and AI/ML integrations including RAG systems and LLM-powered agent workflows. Backend (Supporting — Node.js/NestJS): Developed supplementary API services and event-driven microservices using NestJS and Node.js; integrated MongoDB and PostgreSQL with Prisma ORM for CRM and messaging systems. Frontend: Built responsive, high-performance web interfaces using React.js, Next.js, TypeScript, and Tailwind
Full-Stack Developer at Appen Philippines
November 1, 2018 - March 1, 2022
Contributed to telemedicine and remote patient monitoring platforms for healthcare providers, delivering backend and frontend improvements. Primary backend in C#/.NET: HIPAA-compliant REST APIs, RBAC, and audit logging for patient data. Secondary backend in Python/Django for data ingestion and automation. Frontend UI components with React.js; mobile features for iOS/Android via React Native; collaborated in Agile teams to deliver iterative features.
Senior Full-Stack Developer at Appen Philippines
November 1, 2018 - March 1, 2022
Contributed to telemedicine and remote patient monitoring platforms serving healthcare providers and patients, working across backend, frontend, and mobile layers. Backend (Primary — C#/.NET): Built secure, HIPAA-compliant REST APIs and data processing services using ASP.NET / C# (.NET) with Entity Framework; implemented role-based access control and audit logging for sensitive patient data. Backend (Secondary — Python/Django): Developed Django-based services for data ingestion, reporting pipelines, and backend automation tasks alongside the primary .NET stack. Frontend: Built UI components and patient-facing views using React.js with a focus on accessibility and responsive design. Mobile: Developed cross-platform mobile features for iOS and Android using React Native; integrated Flutter for specific UI workflows. Collaborated with product and QA teams in an Agile environment to deliver iterative feature releases.
Web Developer at Clibase Technology Inc
June 1, 2014 - September 1, 2018
Developed and maintained scalable e-commerce marketplace platforms supporting high-traffic product catalogs, transactions, and real-time features. Backend: Built RESTful backend APIs, database schemas (MySQL, PostgreSQL), and subscription-ready billing architecture using PHP (Laravel) as the primary backend framework. Frontend: Developed JavaScript-driven Frontends with dynamic product listing pages, real-time chat, live inventory updates, and payment gateway integrations. Delivered full project lifecycle from requirements gathering through deployment and post-launch support.

Education

Bachelor of Science in Computer Science at Cavite State University
January 1, 2010 - January 1, 2014
Bachelor of Science in Computer Science at Cavite State University
January 1, 2010 - January 1, 2014

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Healthcare, Financial Services, Retail
    HealthArc - Telemedicine APP
    HealthArc (https://www.twine.net/signin) is a medical software app used for remote patient monitoring and telemedicine. It’s an invite-only program offered through your health plan or health care provider. The application supports reading readings collected from connected Bluetooth and branded Cellular FDA devices, having secure chat and video conferencing capabilities with your Health Provider. HealthArc is an emerging leader in the world of connected medical devices, chronic care and remote patient monitoring platform for an easy connect between patients and Healthcare Provider. You can speak with your physician from home and keep sharing your health information securely with daily reminders. PATIENT CARE PLAN Your care plan will be created by your physician that may include taking different measurements(e.g. take daily Blood Pressure or Glucose), personalized alerts for your vitals, or other instructions. The app will send notifications at frequency defined by your physician and you would be required to complete those “tasks” on your main app screen. Once you click on the pending task, you will be getting on-screen instructions to take your vital readings. It may take 60 seconds or less. VITAL RESULTS The vital info collected in the app will be made available for your Healthcare Provider. You can see your info on the Results tab. REQUESTING APPOINTMENTS If you would like to make appointment with your physician(office, phone or video), you can make request within the app. Physician will notify you and initiate the phone or Video call within the app. MESSAGING YOUR PHYSICIAN OR NURSE You will be able to exchange secured text with your health provider using your inbox. CONNECTED DEVICES Depending upon your provider, you may be asked to connect various health devices (Bluetooth or Cellular) from the reputed medical manufacturers. Disclaimer: Users should check with their doctors before making any medical decisions. HealthKit Integration HealthArc app allows patients to connect their Dexcom, Omron and other HeathKit compatible devices to receive vital readings. skill: Expo, React Native, Next.js, Push Notification, TypeScript, Android, IOS, Python…
    Mellow - AI Chat Assistant
    I built a modern AI Chat Assistant web app with a clean, responsive UI and real-time streaming responses. The project focuses on delivering a smooth chat experience (sidebar chat history, message rendering, and fast interactions) while keeping the codebase production-ready with strong TypeScript typing, linting, and scalable structure. On the backend side, I implemented a Next.js API route that streams model output and supports “tool-like” capabilities (e.g., weather/search/calculation style workflows). On the frontend, I designed reusable UI components and handled common React/Next pitfalls like hydration issues and render loops to ensure stable production builds. Stack: Next.js, React.js, Typescript, Tailwind CSS, OpenAI…
    Shengsho - Web Automation & Monitoring system
    Project: Resilient Web Automation & Monitoring System (Python) (https://www.twine.net/signin Built a production-style automation framework in Python to query and monitor product endpoints at scale with strong reliability features. The system supports proxy/profile rotation, configurable request headers/session settings, and automatic detection of protection challenges (e.g., 403 responses and challenge URLs) to safely stop, rotate, and continue processing without breaking the run. It includes structured logging and response validation (e.g., distinguishing genuine 404 “not found” from access blocks), plus clear error handling and retry controls for long-running jobs. The result is a maintainable automation codebase designed for high-volume checks, operational visibility, and predictable behavior in real-world network conditions. Tech used: Python, requests/urllib3, TLS-capable HTTP client patterns, proxies, structured logging, configuration-driven workflows.…
    Marketplace + Real Time Chat
    Developed a full‑stack marketplace and messaging platform connecting buyers and farmers with real‑time chat and a polished, mobile‑first UI inspired by Telegram. Architected the system to scale into a full commerce workflow including Stripe subscriptions, orders, delivery, and notifications, with production‑ready backend patterns and cloud deployment. What I Built Authentication & role-based access (buyer/farmer/admin flows), profile management, and media handling Realtime messaging (Telegram-like UX): Typing indicators, read receipts, replies, message deletion flows Emoji reactions with smooth UI and cross-user synchronization Context menu reaction bar + action sheet, optimized for desktop and mobile Presence system: Online/last-seen indicators with consistent UX rules WebSocket-driven updates for chat header and thread list Scalable backend foundation (NestJS): Modular services, DTO validation, guards/middleware, clean separation of concerns Webhook-ready endpoints for payments/notifications and event-driven workflows Cloud / Infrastructure (AWS) Compute & orchestration: AWS EC2, ECS (containerized deployment approach) Storage: AWS S3 for user/media assets (profile/farm images, attachments-ready) Database: AWS RDS for relational data (users, threads, orders, subscriptions) Caching / realtime support: Redis (sessions, rate limiting, pub/sub, presence/notification fanout patterns) Tech Stack Frontend: Next.js, React, TypeScript, Tailwind CSS Backend: NestJS (Node.js), REST APIs, WebSockets Data: PostgreSQL/MySQL on RDS, Redis Storage: S3 Deployment: Docker + ECS/EC2 Payments (planned/integration-ready): Stripe subscriptions + webhooks Realtime Messaging: Twilio Conversations (chat transport) + websocket presence layer My Responsibilities End‑to‑end implementation (frontend UI/UX + backend APIs + realtime behavior) Designing data models and message metadata for cross-client sync (reactions/presence) Production-oriented architecture: caching strategy, background/webhook flows, deployment setup…
    GPT Pricing AI Agent
    Market-related operations including building listings, pricing management, city data, FSP calculations, and pricing snapshots for a property management system. https://www.twine.net/signin Stacks: Nest.js, Langchain, cronjob, slack…
    Outfyt - AI Virtual Try-On Studio
    Outfyt uses advanced AI and AR to help you see how clothes actually look and fit before purchasing. Make smarter fashion decisions with realistic virtual try-ons. HuggingFace Omnigen OpenAI FastAPI React Typescript…