You will get A production-ready browser extension for your workflow
Project details
You will get a browser extension built for a real workflow, not just a basic popup demo.
I help businesses build, fix, and upgrade Chrome and browser extensions used for automation, scraping, autofill, API integrations, dashboards, login flows, and internal tools. This includes Manifest V3 development, content scripts, service workers, storage, popup and options UI, external APIs, webhooks, and extension-to-backend workflows.
Many extension projects fail because they only work in ideal conditions. I focus on production use: stable logic, clean structure, secure handling, maintainable code, edge-case testing, and workflows that match how your users actually work.
I can help with:
• fixing broken or unreliable extensions
• upgrading legacy extensions to Manifest V3
• building custom workflow extensions from scratch
• adding API, CRM, webhook, and dashboard integrations
• implementing or debugging login and OAuth callback flows
• improving scraping, autofill, browser automation and event detection
• preparing your extension for release
This project is a strong fit if you need a browser extension that supports a real business process and is built to be maintainable, reliable
I help businesses build, fix, and upgrade Chrome and browser extensions used for automation, scraping, autofill, API integrations, dashboards, login flows, and internal tools. This includes Manifest V3 development, content scripts, service workers, storage, popup and options UI, external APIs, webhooks, and extension-to-backend workflows.
Many extension projects fail because they only work in ideal conditions. I focus on production use: stable logic, clean structure, secure handling, maintainable code, edge-case testing, and workflows that match how your users actually work.
I can help with:
• fixing broken or unreliable extensions
• upgrading legacy extensions to Manifest V3
• building custom workflow extensions from scratch
• adding API, CRM, webhook, and dashboard integrations
• implementing or debugging login and OAuth callback flows
• improving scraping, autofill, browser automation and event detection
• preparing your extension for release
This project is a strong fit if you need a browser extension that supports a real business process and is built to be maintainable, reliable
Web Programming Project
Browser Extension, API Development, API Integration, Data DashboardProgramming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$249
|
Standard
$399
|
Advanced
$1,199
|
|---|---|---|---|
| Delivery Time | 7 days | 12 days | 16 days |
Number of Revisions | 1 | 2 | 3 |
Source Code |
Optional add-ons
You can add these on the next page.
Extra integration or webhook
(+ 2 Days)
+$149
Auth / OAuth flow
(+ 2 Days)
+$199
Store publishing & launch help
(+ 1 Day)
+$149Frequently asked questions
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TS
Tilda S.
Mar 23, 2025
Google Workspace Integration Specialist Needed
Fredy was super good to work with. I will hire him again for any future IT needs for my business. I highly recommend him!
About FREDY OTONIEL
Software Developer | TypeScript - Python - Golang
100%
Job Success
Guatemala City, Guatemala - 11:01 am local time
What I do:
Backend development: APIs, microservices, integrations (TypeScript/Node.js, Python, Golang)
Frontend development: Responsive, accessible, performant interfaces (React, Next.js)
DevOps and tooling: Linux systems, CI/CD, containers, automation, observability
Data workflows: ETL scripts, REST/GraphQL clients, third‑party API integrations
Strengths:
Clean, well-tested code with clear documentation
Strong debugging and performance optimization
Production-minded: logging, metrics, error handling, security basics
Smooth collaboration: proactive communication, reliable delivery, time-zone friendly
Selected accomplishments:
Built and deployed REST/GraphQL APIs serving thousands of daily requests with low latency
Migrated legacy scripts to modern TypeScript/Python with improved test coverage and CI
Designed Golang microservices reducing response time and lowering infrastructure costs
Automated Linux server tasks and CI pipelines to streamline releases
Tech stack:
Languages: TypeScript/JavaScript, Python, Golang
Frameworks: Node.js, Express, FastAPI, Flask, React, Next.js
DevOps: Linux, Docker, CI/CD (GitHub Actions/GitLab CI), Nginx
Databases/Queues: PostgreSQL, MySQL, Redis, SQLite
Cloud/Other: REST/GraphQL, WebSockets, OAuth, Google Workspace Admin
Certifications:
LPIC-2 Linux Engineer (201-450, 202-450)
Google Workspace Administrator
Let’s work together:
I’m available for backend/frontend development, API design, integrations, refactoring, and DevOps automation. I can start with a small milestone or code audit to deliver quick wins.
Steps for completing your project
After purchasing the project, send requirements so FREDY OTONIEL can start the project.
Delivery time starts when FREDY OTONIEL receives requirements from you.
FREDY OTONIEL works on your project following the steps below.
Revisions may occur after the delivery date.
Scope and workflow review
I review your workflow, technical constraints, target pages, existing code, integrations, and success criteria to define the correct implementation plan.
Architecture and extension setup
I set up the Manifest V3 extension structure, permissions, UI, storage, service worker, and integration approach based on your workflow.