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4.8/5
Based on 5,645 client reviews
Hezekiah O.

Akure, Nigeria

$30/hr
4.6
9 jobs

Stop doing manual data entry. Let me build you a self-healing workforce. I am a Full-Stack Automation Engineer specializing in n8n and Python. Unlike standard "Zapier consultants" who only know drag-and-drop, I write custom code (JavaScript/Python) to fix complex API issues and build robust AI agents that actually work. ๐Ÿ”ฅ What I Build for Clients: ๐Ÿ”น AI Customer Support Agents: Workflows that read tickets, draft responses (using GPT-4), and wait for your one-click approval on Slack. ๐Ÿ”น Lead Gen Pipelines: Scrape Google Maps -> Enrich data (Apollo) -> Verify Email -> Add to CRM -> Send personalized cold email. ๐Ÿ”น Custom API Integrations: Connecting "impossible" tools using Python/FastAPI wrappers when native integrations fail. ๐Ÿ›  My Tech Stack: ๐Ÿ”น Automation: n8n (Self-hosted & Cloud), Make.com, Webhooks. ๐Ÿ”น Code: Python (Flask/FastAPI), JavaScript (Node.js), JSON, SQL, Mongodb, supabase, Qdrant. ๐Ÿ”น AI: OpenAI (Assistants API), Anthropic Claude, LangChain. I don't just "connect apps." I build systems that handle errors, retry automatically, and scale with your business. Ready to save 20+ hours a week? Click "Invite to Job" and let's chat.

  • Python
  • n8n
  • API Integration
  • Automation
  • Web Scraping
  • FastAPI
  • Docker
  • React
  • Artificial Intelligence
  • Node.js
  • Linux System Administration
  • SQL
  • REST API
  • CRM Automation
  • Lead Generation
John L.

Grass Valley, California

$65/hr
4.8
284 jobs

Zoho CRM Architect & Forensic Specialist | 13+ Years Zoho | Creator, Deluge, Analytics, Integrations I'm an independent Zoho Partner who has spent the last 13+ years architecting, customizing, and rescuing Zoho CRM instances for 150+ SMBs. From custom modules and Deluge automation to Creator applications and multi-system integrations, I work at the code level where most consultants stop. Core Zoho Services: Zoho CRM โ€” Setup, customization, custom modules, Deluge functions, blueprints, workflows, scheduled jobs, and bulk data/API optimization Zoho Creator โ€” Custom application development, portal builds, WorkDrive integration, Deluge-driven workflows Zoho Analytics โ€” Reporting, dashboards, and cross-module data models Zoho One ecosystem โ€” CRM โ†” Books, Recruit, Desk, Inventory, and Campaigns integrations External integrations โ€” APIs, Twilio, MQTT, WooCommerce, Stripe, Catalyst, Zapier, Make AI integration โ€” Native Zoho AI, OpenAI, and Claude/MCP-based automation layers Forensic Specialty โ€” Zoho CRM Field Dictionary: When something is quietly breaking your Zoho CRM โ€” field values changing overnight, workflows conflicting, functions nobody documented โ€” I find it. I produce a complete forensic analysis of your instance: every field mapped across its three naming systems (display label, API name, column name), every workflow, blueprint, and scheduled function cross-referenced to show exactly what touches what. Delivered as a searchable HTML dictionary and AI-ready markdown files your team can query in plain English using Claude or ChatGPT. Instantly answer "why does Lead Score change overnight?" Know every automation that touches a field before you change it Onboard new admins in hours instead of weeks Audit-ready documentation for compliance and handoff The Problem I Solve: Most Zoho CRM instances grow organically. Consultants come and go. Automations get layered on top of automations. Nobody documents the Deluge functions running at 2am that silently update your lead scores, deal health, or pipeline status. When something breaks โ€” or when a new admin inherits the system โ€” nobody knows where to start. I do. Why Work With Me: Beyond Zoho, I bring 20+ years of enterprise IT leadership โ€” including VP-level roles at a major Wall Street firm covering Legal, Compliance, Finance, AML/OFAC, and SOX systems. That background means I've managed the complexity you're living with, not just read about it. You get both the technical depth to extract and analyze your system at the code level, and the business judgment to tell you what actually matters. Technical stack: Zoho CRM, Creator, Analytics, Deluge, Catalyst | Python, SQL, REST APIs, Claude/MCP, AI automation

  • Business Analysis
  • PHP Script
  • Zoho CRM
  • Data Analysis
  • RESTful API
  • Zoho Creator
  • Node.js
  • API Integration
  • Twilio API
Oleksandr S.

Sofiyivska Borschagivka, Ukraine

$35/hr
5.0
176 jobs

I help businesses automate operations, streamline workflows, and implement AI-powered systems that save time, reduce manual work, and improve efficiency. Over the last few years, I have built 100+ automation solutions for startups, agencies, e-commerce businesses, consultants, and service companies using Make, n8n, Zapier, OpenAI, and various CRM platforms. My work ranges from simple workflow automation to complex business systems involving AI agents, CRM integrations, customer onboarding, reporting, lead management, and internal operations. Core expertise: โ€ข AI Automation & AI Agents โ€ข Make (Integromat), n8n, Zapier, Pipedream โ€ข OpenAI (ChatGPT), Claude, LangChain โ€ข CRM Systems: HubSpot, HighLevel, Pipedrive, Zoho CRM โ€ข API Integrations, Webhooks, Custom Automations โ€ข Airtable, Google Sheets โ€ข Marketing Automation & Lead Nurturing โ€ข Internal Business Systems & Operations Automation โ€ข Client Portals, Dashboards, and Reporting Solutions Recent projects include: โœ” AI-powered customer support and lead qualification systems โœ” Automated sales and marketing funnels โœ” CRM synchronization and workflow automation โœ” Invoice processing and document automation โœ” Recruitment and HR automation workflows โœ” Reporting dashboards and business intelligence systems โœ” Content generation and publishing automation โœ” Custom business management systems What clients appreciate most is my ability to understand business processes first and then design automation that delivers measurable results rather than simply connecting tools together. If you're looking for someone who can analyze your workflow, identify bottlenecks, and build reliable automation systems that scale with your business, I'd be happy to discuss your project. Click "Hire Now", and letโ€™s start optimizing today! ๐Ÿš€

  • API
  • HubSpot
  • Zapier
  • Mailchimp
  • Marketing Automation
  • WordPress
  • Google Sheets
  • Pipedrive
  • Make.com
  • WooCommerce
  • ClickUp
  • Automation
  • API Integration
  • n8n
  • Google Apps Script
Orest A.

Overland Park, Kansas

$85/hr
4.9
698 jobs

You need software that solves a real problem, built right the first time, by someone who understands your business and not just your stack. $2.7M+ earned on Upwork ยท 650+ jobs ยท 18,000+ hours ยท 305 reviews at 4.9 ยท Top Rated Plus ยท featured in an official Upwork Success Story. "I am a former CIO and CTO and have worked with hundreds of software engineers. Orest is one of the best in terms of raw talent, knowledge, efficiency, creativity, flexibility, communication and working relationship. I could not recommend him more highly." โ€” client review, February 2026 I'm Orest โ€” a full stack developer and founder of SoftDoes, a Kansas City-based team. I architect and lead every build personally; my team gives you agency capacity without agency overhead. Upwork wrote a feature on how we did it. What clients hire me for: โ€ข Web applications and SaaS platforms โ€” React, Next.js, Node.js, TypeScript, Python, PostgreSQL and Supabase, with Stripe subscriptions, marketplaces and multi-tenant architecture โ€ข AI development โ€” AI agents, chatbots and voice agents, LLM integration with OpenAI and Claude, RAG pipelines, and automation built into real workflows โ€ข Taking AI-built prototypes to production โ€” your app started in Lovable, Bolt or Claude Code and now needs auth, security, payments and real infrastructure โ€ข API development and integration โ€” REST and GraphQL, third-party integrations, webhooks, payment gateways, CRM and business system connections โ€ข Websites and e-commerce โ€” WordPress, WooCommerce, Shopify, Webflow and custom builds, redesigns, migrations and performance work โ€ข Mobile apps โ€” React Native for iOS and Android โ€ข Cloud and DevOps โ€” AWS, GCP, Azure, Docker, CI/CD, and compliance-ready builds for healthcare (HIPAA) and fintech (PCI) Recent results: โ€ข A healthcare founder went from concept to a live, compliant product in under six weeks โ€ข A construction company replaced five fragmented tools with one custom operations platform โ€ข A fintech team cut onboarding time in half with an AI-assisted workflow built in a single sprint "Orest, Nazarii, and their team built our full AI-powered SaaS platform from scratch. Communicative and reliable, consistently delivering quality work on schedule. Already starting our next project together." โ€” Will S., AI SMS platform, February 2026 I work best with companies big enough to need real software and clear-eyed enough to know that building it wrong the first time costs more than doing it right. If that's where you are, let's talk โ€” or book a 30-minute consultation directly from this profile. ๐Ÿ‡บ๐Ÿ‡ธ U.S.-based. U.S.-led. Kansas City. Services: Web & Software Development โ€” Full-stack development ยท Web application development ยท Custom software development ยท SaaS development ยท MVP and product development ยท Legacy platform modernization ยท Systems integration ยท Internal tools and admin panels ยท CRM and ERP builds AI Development โ€” AI integration ยท AI agents ยท LLM integration (OpenAI, Claude) ยท RAG (Retrieval-Augmented Generation) ยท AI chatbots and voice agents ยท Document AI ยท Prompt engineering ยท AI-powered workflows ยท Machine learning Automation โ€” Workflow and business process automation ยท n8n ยท Zapier ยท Make .com ยท GoHighLevel ยท CRM automation ยท Data extraction and web scraping ยท Onboarding automation ยท Reporting automation Websites & E-Commerce โ€” WordPress development ยท WooCommerce ยท Shopify ยท Webflow ยท Squarespace ยท Wix ยท Framer ยท Web design ยท Website redesign and migration ยท Landing pages ยท Product configurators ยท Page speed and Core Web Vitals ยท SEO-friendly builds Mobile โ€” React Native ยท iOS and Android apps ยท Expo ยท Capacitor ยท Mobile UI development Design โ€” UI/UX design ยท Figma ยท SaaS dashboards ยท Wireframing and prototyping ยท Conversion rate optimization Stack โ€” React ยท Next.js ยท Node.js ยท Python ยท Django ยท FastAPI ยท TypeScript ยท JavaScript ยท PHP ยท HTML ยท CSS ยท Tailwind ยท REST APIs ยท GraphQL ยท PostgreSQL ยท MySQL ยท MongoDB ยท Supabase Payments & Integrations โ€” Stripe ยท Stripe Connect ยท PayPal ยท Plaid ยท Twilio ยท payment gateway integration ยท third-party API integration ยท webhooks Cloud & DevOps โ€” AWS ยท Google Cloud ยท Microsoft Azure ยท Vercel ยท Docker ยท Terraform ยท CI/CD ยท infrastructure as code ยท monitoring and observability ยท hosting migration ยท scalability and performance Security & Compliance โ€” HIPAA compliance and healthcare software ยท PCI and fintech software ยท SOC 2 readiness ยท security audits and hardening ยท role-based access control (RBAC) ยท compliance-ready systems

  • API
  • Web Design
  • Web Development
  • Artificial Intelligence
  • Node.js
  • Python
  • Software Development
  • HTML
  • JavaScript
  • React
  • API Integration
  • Full-Stack Development
  • PHP
  • WordPress
  • AI Agent Development
  • Next.js
  • Web Application
  • TypeScript
  • Machine Learning
  • AI Development
Atharva P.

Nagpur, India

$30/hr
5.0
14 jobs

If your agency is spending engineering hours on work that should run automatically, that is a systems problem, not a staffing problem. I build backend automation infrastructure that handles the execution layer your team should not have to think about: data pipelines that self-heal, AI workflows that scale, and integrations that do not break silently on a Friday night. WHAT I BUILD: Data & Scraping Pipelines Production-grade scrapers using Python, Scrapy, Crawlee, and Playwright. Rate-limit handling, proxy rotation, structured output to PostgreSQL, Google Sheets, or your CRM. Built a role-detection system that identified open hiring positions across hundreds of company websites daily and synced results automatically to a client's tracking sheet. n8n & Make Workflow Automation Multi-step workflows connecting CRMs, communication tools, databases, and third-party APIs. Built WhatsApp + Google Sheets + AI pipelines for automated client communication. Email-to-AI-to-database flows with full error handling and Slack alerting on failures. AI-Enriched Pipelines LLM integration via OpenAI, Gemini, and Anthropic APIs inside production workflows. RAG vector pipelines, document parsing (PDF, invoice, form), AI-driven lead enrichment and classification. Token-cost aware: I optimize prompt structures and model selection to keep API costs under control at scale. API Integrations & Custom Backends FastAPI endpoints powering workflow logic, OAuth2 and webhook handling, REST API development. Integrated across Stripe, HubSpot, GoHighLevel, Airtable, Notion, Slack, Google Workspace, and 50+ other platforms. Deployment & Reliability Self-hosted n8n on VPS, GitHub Actions for scheduling, Railway and Google Cloud Run for backend services. Every system ships with error monitoring, exception-handling wrappers, and documentation your team can actually use. TECHNICAL STACK: Orchestration: n8n (Cloud/Self-Hosted), Make, Zapier Languages: Python, Node.js, JavaScript AI: OpenAI API, Google Gemini, Anthropic, RAG Vector Pipelines Data: PostgreSQL, Airtable, Google Sheets Scraping: Scrapy, Playwright, Crawlee, Selenium Backend: FastAPI, REST APIs, Webhooks, OAuth2 Deployment: VPS, Google Cloud Run, Railway, GitHub Actions, Vercel WHO I WORK WITH: I work as an execution partner for agencies and consultants who need reliable backend delivery without the overhead of a full-time hire. If you bring the clients and the brief, I handle the build. Send me a message with your biggest manual bottleneck and I will tell you exactly how to automate it.

  • API
  • n8n
  • Make.com
  • Automation
  • Task Automation
  • AI Agent Development
  • Python
  • ChatGPT API
  • OpenAI API
  • API Integration
  • Google Cloud Platform
  • REST API
  • FastAPI
  • Selenium
  • Web Scraping
Jorge R.

Lima, Peru

$35/hr
4.5
389 jobs

Most "Zoho consultants" only configure modules โ€” activate CRM, adjust fields, turn on prebuilt automations. When your process needs something Zoho doesn't offer out of the box, that's where they stop. I build the part they can't: custom functions in Deluge script, API integrations connecting Zoho to your ERP, payment gateway, or in-house systems, and advanced Zoho Flow automations that go beyond drag-and-drop. What I do: โ€” Custom Deluge functions for business logic Zoho apps doesn't handle natively โ€” REST API integrations (OAuth2, webhooks) between Zoho apps and external platforms โ€” Advanced Zoho Flow automation design โ€” Data migration with deduplication and rollback safety โ€” Zoho CRM, Books, Inventory and Zoho One implementations that actually connect to each other Integrations I work with: QuickBooks / Xero, Shopify, Slack, Google Workspace, Microsoft 365 / Teams, Stripe / PayPal / Authorize.NET, WhatsApp Business, Mailchimp / ActiveCampaign / HubSpot, Zapier, and Salesforce (including Salesforce-to-Zoho migrations). If a previous partner told you "Zoho can't do that" โ€” it usually can. I've built these integrations for companies that had already been told no by someone else. I explain everything in plain business terms, not developer jargon โ€” you don't need to understand the code to know what it does for your operation. Based in Peru โ€” comfortable working with teams across the US and Latin America (US business hours - EST)

  • API
  • API Development
  • Zoho CRM
  • Zoho Creator
  • Zoho Desk
  • Zoho Books
  • Zoho Analytics
  • Zoho Survey
  • Zoho Recruit
  • Zoho Projects
  • CRM Software
  • Zoho Platform
  • Marketing Automation
  • CRM Automation
  • Automation
  • API Integration
  • Customer Relationship Management
  • REST API

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Don't just take our word for it

What does an API consultant do?

An API consultant designs and validates the technical contracts that allow different software systems to exchange data reliably. This role focuses on defining clear rules for how applications communicate before any code is written, which prevents costly integration errors later in the development cycle. You establish the structure of requests and responses so that frontend and backend teams can work in parallel without blocking each other. Your work turns abstract business requirements into precise technical specifications that developers can implement with confidence.

  • You author OpenAPI specification documents that define every endpoint, parameter, and data model for the interface. These contract files serve as the single source of truth for both the server implementation and the client applications that consume the data. By detailing exact request and response structures, you remove ambiguity and allow teams to build against a stable target rather than guessing at expected formats.
  • You build automated test suites and executable request collections to verify that the API behaves exactly as the specification describes. Using tools like Postman, you create environments that simulate real-world usage scenarios and validate error handling under various conditions. This process catches mismatches between the documented contract and the actual code early, which reduces debugging time during the final integration phase.
  • You generate comprehensive documentation directly from the API definition to ensure that consumer developers understand how to use the interface correctly. This includes clear examples of authentication methods, rate limits, and common error codes that external partners will encounter. You also assist internal teams with integration patterns by resolving contract mismatches and guiding them through the adoption of new endpoints or version changes.

How to hire an API consultant on Upwork

Step 1: Post a job

Define your integration goals and technical requirements clearly to attract qualified specialists. The Job Post Generator powered by Umaโ„ข, Upwork's Mindful AI helps you draft a precise description in seconds. Describe your needs in a few sentences and Uma drafts a job post for the role. You can write a new post, update a saved draft, or reuse an existing post.

  • Specify whether you need an API-first design using OpenAPI Specification documents or assistance with integrating existing endpoints.
  • List required tools such as Postman API platform for building test suites and validating request collections.
  • Clarify if the consultant must generate server code from definitions or focus on creating consumer-facing documentation.

Step 2: Evaluate candidates

Review portfolios for concrete evidence of API lifecycle management and contract design. Uma can run instant video interviews and build shortlists with side-by-side comparisons to speed up your selection process.

  • Look for samples of OpenAPI definition files that demonstrate clear request and response models.
  • Check for executable request collections that prove the candidate validates API behavior through automated tests.
  • Verify experience in resolving contract mismatches during complex third-party integrations.

Step 3: Interview your top choices

Discuss specific technical approaches to governance and monitoring before making a decision. Interviews can be scheduled and conducted within Upwork Messages with an immediate transcript and summary after each one.

  • Ask how they structure API contracts to prevent breaking changes for downstream consumers.
  • Request examples of how they derive documentation directly from specs to maintain accuracy.
  • Evaluate their method for testing edge cases in request payloads and error handling.

Step 4: Agree on scope and begin work

Set clear milestones for specification drafts and integration validation to track progress effectively. Use Upwork Messages and the contract workroom for communication and project management, plus identity verification, payment protection, hourly tracking, and project funds for security.

  • Define deliverables such as validated OpenAPI documents and generated server code stubs.
  • Establish criteria for accepting test suites that cover critical integration paths.
  • Schedule regular reviews of API documentation to ensure it matches the implemented behavior.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring an API consultant cost?

$500-$2,500 per project is a typical range for focused API consultant work. Final pricing depends on scope, technical complexity, required integrations, source-material quality, revision needs, and the freelancer's experience level.

API specification review

$500-$1,200/project

Entry-level to mid-level
  • Identified gaps in existing OpenAPI definitions
  • Specific fixes for contract mismatches and standards
  • Steps to verify corrected API behaviors

API documentation generation

$1,200-$2,500/project

Mid-level
  • Consumer-ready guides derived from API specs
  • Executable collections for common use cases
  • Standards for future documentation updates

API contract definition

$2,500-$4,500/project

Mid-level to senior-level
  • Complete YAML or JSON definition of endpoints
  • Defined request and response schemas
  • Simulated API for early frontend testing

API integration support

$4,500-$7,000/project

Senior-level
  • Scripts connecting internal systems to external APIs
  • Automated checks for data flow and error handling
  • Resolved issues and configuration notes

Custom API development

$7,000-$12,000/project

Expert-level
  • Generated and customized backend code from specs
  • Applied authentication and authorization rules
  • Ready-to-run API with monitoring hooks

Frequently asked questions

Is hiring an API consultant worth it?

For most businesses, yes: hiring an API consultant is worthwhile. This specialist designs clear contracts and validates integrations before your team writes production code. You avoid costly rework from mismatched endpoints or undocumented behaviors.

How do I evaluate API consultant candidates?

Review their OpenAPI specification documents to see if they define request models and response schemas clearly. Ask them to share a Postman collection that includes automated tests verifying endpoint behavior against those specs.

What deliverables should I expect from an API consultant?

You receive OpenAPI specification files, executable test suites, and generated documentation derived from the contract. They may also submit server code scaffolds built directly from the definition.

Do API consultants write the final application code?

They often generate server stubs and validate logic, but your internal developers usually build the core business application. The consultant focuses on interface design, integration patterns, and contract compliance.