The ultimate guide to hiring a web developer in 2021
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
OAuth is an authorization protocol enabling a third-party application to access resources, such as data and content, from another resource provider system on behalf of a user. An OAuth Developer is a specialist who has the technical capabilities to facilitate the secure transfer of data from one system to another. OAuth Developers work with clients who want to enable their users to transfer data from one application to another, as well as enable access to external resources with out having to provide credentials.
Essentially, OAuth Developers are responsible for ensuring that the proper security measures are in place for this data transfer, and interoperate various components in order to make it all happen. OAuth Developers require extensive knowledge in backend technologies and security protocols.
Here's some projects that our expert OAuth Developer made real:
Our team of highly skilled OAuth developers have completed all kinds of projects related to ensuring the secure exchange of data between applications. If you are looking for a reliable way for your users go authenticate themselves on other systems securely, our developers can be trusted to deliver results on Freelancer.com. We invite you to post your own project now and hire an experienced OAuth Developer from our team!
Von 18,105 Bewertungen, bewerten Kunden unsere OAuth Developers 4.9 von 5 Sternen.OAuth is an authorization protocol enabling a third-party application to access resources, such as data and content, from another resource provider system on behalf of a user. An OAuth Developer is a specialist who has the technical capabilities to facilitate the secure transfer of data from one system to another. OAuth Developers work with clients who want to enable their users to transfer data from one application to another, as well as enable access to external resources with out having to provide credentials.
Essentially, OAuth Developers are responsible for ensuring that the proper security measures are in place for this data transfer, and interoperate various components in order to make it all happen. OAuth Developers require extensive knowledge in backend technologies and security protocols.
Here's some projects that our expert OAuth Developer made real:
Our team of highly skilled OAuth developers have completed all kinds of projects related to ensuring the secure exchange of data between applications. If you are looking for a reliable way for your users go authenticate themselves on other systems securely, our developers can be trusted to deliver results on Freelancer.com. We invite you to post your own project now and hire an experienced OAuth Developer from our team!
Von 18,105 Bewertungen, bewerten Kunden unsere OAuth Developers 4.9 von 5 Sternen.I have a functioning app, but it currently lacks any native way to connect with external mailboxes. I need a developer who can wire up full OAuth-based access to both Gmail and Outlook so that my users can authorise their accounts, keep tokens fresh, and have new messages pushed back into the app in real time. Here’s the flow I have in mind. You will guide me through creating the Google Cloud Console and Azure AD projects from scratch, generate the client credentials, and then build the OAuth consent screens. Once credentials are in place, the app must handle the three-legged OAuth flow, store refresh tokens securely, and automatically renew access tokens without user intervention. For incoming mail, I want a webhook or push subscription strategy (Gmail Push Notifications / Microso...
The task is to create a PHP-based omnichannel chat module that lets me manage Facebook, Instagram, and Telegram conversations from a single web dashboard. Core workflow • A settings page must let me securely connect the three platforms. • When someone writes to the linked Facebook Page, Instagram account, or Telegram bot, the message should appear instantly in the dashboard. • I must be able to send replies from the same interface, and the user should receive them in the original channel. Automation Automated DM replies are required for Facebook and Instagram. The logic can live in PHP or a simple rule engine inside the app; feel free to suggest the most reliable approach. Don't use any third-party platform APIs. Deliverables 1. Clean PHP codebase with d...
I need a GoHighLevel specialist to implement a true multi-site data model using Custom Objects + Associations. This is specifically for Real Estate / Body Corporate / multi-property clients, where: One customer/contact must link to multiple Properties/Sites Each Property/Site must link to multiple Site Contacts (tenant, property manager, billing contact) Adding a new property must NOT create a duplicate customer/contact This project is ONLY for the multi-site / custom objects / associations part (not general GHL cleanup). Non-negotiable: NDA-safe proof BEFORE engagement Before I award any milestone or grant access, you must provide NDA-safe Loom or NDA-safe screenshots showing this working inside GoHighLevel: Settings → Custom Objects list page Properties/Sites custom object ...
I need my existing app wired up to an existing external REST API so it can securely fetch data, submit updates, handle authentication, and allow users to upload files. Most endpoints accept/return JSON, and uploads are sent as multipart/form-data — your code must handle both cleanly and reliably. Deliverables: A small, reusable, well-typed API client layer (e.g., /lib/api or similar) using fetch or Axios Authentication integration (bearer tokens / OAuth details provided). Requests should be signed correctly and handled consistently across the app Example usage: at least one working flow for: data retrieval data submission login/session handling file upload (multipart/form-data) Robust error handling (including loading + failure states) and a short README explaining patterns...
The project covers two linked assets—a marketing website and an interactive web application—built as a single, cohesive code-base. Everything must be modern, fully responsive, and branded with a clean, intuitive UI/UX. Tech stack is already set: Angular on the frontend and a Node.js (Express) backend. Expect secure, stateless authentication (JWT or OAuth, whichever you judge best), role-based access, and a well-structured REST API that can later expand to GraphQL if needed. Data will live in either MySQL, PostgreSQL, or MongoDB; I’m open to whichever you recommend once requirements are refined. Core functionality • Public-facing pages for visitors • A logged-in web app with real-time notifications • Separate admin dashboard for user, content, and sett...
I have a live mobile app that needs several quick fixes and small feature tweaks: • User notifications already appear correctly, but inside the notification settings screen I need an Add / Delete option so users can manage their own notices. • The Info button is presently inert. It must finally “Do” what it was meant to—react when tapped and complete its intended action rather than sitting idle. • In the admin area an unused “Donut” button slipped in during a previous update. Please remove it cleanly from both UI and code. • I want you to confirm whether a developer-level back door still exists. If any direct access remains, close it and leave only the standard, authorised paths. • Google sign-in is integrated but currently fails....
I’m moving a full-stack Node.js / TypeScript application (Express API plus a React-Vite front end) from Replit into a secure, production-grade Google Cloud environment. Everything will be green-field, so you can design the layout cleanly without wrestling with legacy resources. Only the production tier is required. WHAT I NEED YOU TO BUILD • A GitHub-triggered Cloud Build pipeline that containerises the app, pushes to Artifact Registry, and rolls out to Cloud Run with zero-downtime updates. • Private Cloud SQL for PostgreSQL (Private IP via Private Service Access) reachable from Cloud Run through a Serverless VPC Access connector. • Secrets (DB creds, JWT keys, etc.) stored in Secret Manager and injected at runtime. • External HTTPS Load Balancer fronting...
I already have an n8n-powered AI video automation workflow that uploads to YouTube via the V3 API and pulls data from Google Sheets. I need someone to tighten up this flow so every piece works smoothly and is easy to maintain. Here is what I want done: • Trace and repair any broken or missing links inside the existing YouTube V3 upload routine, iits already Google Sheets connections,n8nconnection • Refine the current VidIQ-style logic so keyword selection, tagging, and timing rules trigger . • link UI/UX (design files are ready). When you finish, hand me a Google Sheets guide that walks through setting configuration and prompt, screenshots ,video [Mandatory] tell me your portfolio related to this task. and Tell me price and timeline.
Social Media Posting & Campaign Management Application 1. Platform Integration • Native API integration with Facebook and Instagram. • OAuth 2.0 authentication for secure account connection. • Direct integration with each platform’s Advertising Management APIs. • API rate-limit handling and error management. 2. Multi-Platform Posting • Publish images, videos, and reels simultaneously. • Schedule posts for automated future publishing. • Queue-based execution for bulk posting. • Draft saving and approval workflow (team-ready). • Reusable post templates. • Centralized media library (image/video storage and reuse). 3. Campaign Management • Create and manage advertising campaigns from the application. • Full lifecycle control...
Description: I need an experienced GoHighLevel (GHL) specialist to clean up and configure our GHL account so it is stable, consistent, and ready for a future VPS-hosted middleware integration with ServiceM8 and Gmail. This project is GHL configuration only (no VPS middleware build in this job). Scope / Deliverables Contact schema cleanup (critical) Remove/avoid conflicting phone fields (mobile/phone/landline handling must be clean) Business vs residential naming: support Customer/Company Name properly (not forced into first/last) Address handling: ensure Service Address and Billing Address are separate and never overwrite incorrectly Multi-site / Properties model (required) Implement or fix Custom Objects for multi-site (e.g., Properties/Sites) Associations: Contact ↔ Propert...
I want a web platform that lets Murder Mystery 2 players stake their Roblox items in real-time games—coin flip, jackpot and an upgrader—modelled as closely as possible on the look, feel and flow of bloxybet.com. Coin Flip • Any number of coin-flip rooms can run in parallel. Players should be able to open a room, set the wager, share the link and wait for an opponent, or instantly join an open room. The interface needs the same fast, casino-style experience Bloxybet offers, with live status updates through WebSockets or a similar solution. Jackpot & Upgrader Both games must mirror Bloxybet’s mechanics: tier-based jackpot pools that roll on a timer, and an upgrader where players select an item, choose a percentage chance and see an animation revealing suc...
I’m already using to talk with my clients; now I need those conversations to actually create, move, or cancel service appointments inside Square—and just as easily inside Stripe for the next business I onboard. I am not locked into - if you’ve got a better suggestion let me know why? Here’s what I need the finished solution to do: • Listen to Synthflow’s webhook calls, map the intent (book, reschedule, cancel, quote price) and any slot data, then hit the correct Square or Stripe Booking API endpoint. • Return a clear, conversational response that my agent can read back so the caller always knows what just happened. • Keep everything—API keys, service IDs, time-zone settings—in a single config file or environment block so I...
## Project Overview Seeking an experienced data engineer to integrate our complete Google marketing stack into Google BigQuery as a centralized data warehouse, with an AI-powered natural language query interface on top. ## Scope of Work **Phase 1: Data Integration to BigQuery** Connect and automate data pipelines from: - Google Analytics 4 (GA4) - Google Ads - Google Search Console - Google Tag Manager - Google Merchant Center Requirements: - Set up automated, near real-time data transfers - Design efficient BigQuery schema with proper data modeling - Implement ETL/ELT processes with data quality checks - Create unified views combining data across platforms - Import historical data - Document all data flows and transformation logic **Phase 2: AI Integration Layer** Implement AI-power...
I need a mobile-responsive web app that lets visitors sign in through the Steam API, automatically pulling their SteamID so they can enter free sweepstakes with a single click. The core build should feel snappy on phones first, then scale gracefully to desktop. Key flow • User arrives, taps “Sign in with Steam,” and is authenticated via OpenID. • Once logged in, the site tracks each entry they make, stores it under their account, and presents a simple profile page that shows only their sweepstakes history. Sweepstakes engine An automated job must close each giveaway at the scheduled time, randomly select a winner from valid entries, and fire off both an on-site and email (or Steam message if feasible) notification. I also want an admin view where I can start...
I need a small-scale community-focused website that offers two sign-in options: Google OAuth (Gmail) and a classic email-and-password flow. The primary goal is community engagement, so once users are inside they must be able to create a profile, edit basic details, and exchange direct messages with each other. No e-commerce, no complex forums—just a clean, responsive space for members to connect. A lightweight tech stack is fine as long as it is secure and quick to deploy; React or Vue on the front end and Node, Django, or Laravel on the back end would all work if OAuth and secure password storage are implemented correctly. Mobile-friendly layout is required, and I’d like the initial build hosted on a standard cloud service (AWS, Heroku, Vercel, or similar) so I can test it li...
We are looking for an experienced AI/Backend Engineer (or small team) to help design and implement a foundational setup for an enterprise “Agentic AI” goal is to enable a prompt-based interface where business users can ask questions and trigger actions across internal risk management and document systems through a governed API layer. This is NOT a chatbot UI project focuses on backend architecture, AI orchestration, and secure enterprise integration. Target application includes IBM OpenPages SaaS (GRC) accessed via REST APIs. The first phase will implement a proof-of-concept that allows an AI agent to retrieve and update structured records using approved APIs via a secure middleware service. Scope of Work (Phase-1: Foundational Setup) Build a secure middleware API servic...
Plaid + Chase Connectivity Issue via API Plaid + Chase OAuth Integration — "Invalid Credentials" After Successful OAuth Flow The Problem: We have a production Plaid integration (Node.js/Express) that connects bank accounts via Plaid Link. American Express and Capital One connect and sync perfectly. Chase fails every time with "Username or password incorrect" AFTER the OAuth flow completes successfully. The Flow: 1. User clicks Connect Bank → Plaid Link opens 2. User selects Chase → Plaid fires OPEN_OAUTH event 3. User redirects to Chase's website and logs in successfully 4. Chase redirects back to our app with oauth_state_id 5. Plaid Link re-opens with receivedRedirectUri 6. Plaid shows "Username or password incorrect" — connectio...
## Project Overview We are developing a mobile application integrated with a Shopify embedded app and a web-based admin dashboard. We are looking for an experienced **full-stack developer (or team)** and a **UI/UX designer** to support development from wireframing to deployment. This is an MVP with potential for long-term collaboration and feature expansion. --- ## Required Technical Skill Set ### Backend Development * Strong experience with **Node.js / Python / PHP** (flexible stack) * RESTful API development * OAuth and authentication flows (JWT, token-based auth) * Webhook handling * Cloud-based architecture * Database design (Postgres / MongoDB / Firebase or equivalent) * File storage integration (AWS S3 or similar) * Scalable SaaS architecture planning --- ### Mobile Development * ...
I’m building a B2B platform that now has to expose a well-structured REST API so other services can hook in without friction. The immediate priority is to wire my software to a range of external providers—including SMS / Voice APIs, social-media feeds, data-enrichment sources, single-sign-on, scheduling tools and some AI/ML services—while keeping the interface consistent for our own clients. Here is how I picture the job: • Design clean, versioned REST endpoints that sit on top of our existing stack (Node + Postgres) and follow standard verbs and status codes. • Build the integration layer for each third-party service. I need graceful handling of auth flows (OAuth2, JWT, API keys), rate-limits and retries, plus a simple way to toggle providers on or off. &bu...
I need a senior React developer who already feels at home inside the Shopify ecosystem to build a custom embedded app dedicated to product management. The first release will concentrate on two pain points in my current workflow: • Accurate, real-time inventory tracking across all locations • Fast, reliable creation and maintenance of product variants You’ll work with React (ideally TypeScript), Shopify App Bridge, Polaris, and the Admin GraphQL API to deliver an app that lives inside the Shopify admin, authenticates through OAuth, and feels 100 % native. Clear, maintainable code, semantic commits, and component-level testing are expected. Deliverables • A working embedded app installed on my development store • Reusable React components for inventory an...
Title Microsoft Outlook / Graph API Developer for AI-Assisted Email Drafting Tool Description I am building a private productivity application that integrates with Microsoft 365 and uses modern language models to assist in generating email drafts. I’m looking for an experienced developer who can help design and implement an MVP with the following capabilities: • Authenticate users with Microsoft 365 • Access mail folders via Microsoft Graph • Retrieve email metadata (participants, dates, subjects, thread IDs) within user-defined folders and date ranges • Aggregate communications by contact • Provide structured context to an LLM • Create draft messages and save them to the user’s Outlook Drafts folder • Support insertion of deterministic c...
Please read carefully for full consideration DO NOT POST QUESTIONS TO BOARD THEY WILL BE IGNORED There is a technical document if you would like consideration please fill out document alon with your bid this is not a crypto bot and i am not seeking a feature builder Senior Broker Execution Engineer – Full Automation Hardening & System Cohesion – Cash-Only Options Engine I am completing a nearly finished Python-based automated options trading system. Strategy logic is complete. This engagement is not about alpha or indicator development. This is systems engineering, execution safety, wiring integrity, and production reliability. System Context Per current architecture: Schwab Trader API OAuth implemented Token server active Cash account only Single-leg equity...
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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