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Top freelance Integration Testing developers available to hire
Seasoned Web Developer and Blockchain enthusiast with a proven track record in the IT and services industry. Expertise in Research, PHP, HTML, JavaScript, and Blockchain development, including Smart Contracts. Skilled in automation, application testing, and cybersecurity analysis for web and mobile apps.
Is your AI-powered MVP built on a fragile 'vibe-coded' foundation? Are you struggling to scale a prototype that was built with lightning speed but is now plagued by bugs, security holes, and technical debt?
I transform brittle AI prototypes into robust, **production-ready applications**. As a senior AI engineer specializing in the **Node.js** and **React** ecosystem, I bridge the gap between rapid, AI-assisted development and the disciplined engineering required for scalable, secure software.
But robust software is only half the battle. The other half is making it *work for your business*. I design and implement **intelligent automation workflows** that connect your apps, eliminate manual tasks, and free up your team to focus on high-impact work.
Whether you need to rescue a failing project, automate a core business process, or build a scalable MVP from the ground up, I provide the expert oversight to ensure your AI initiatives deliver real, measurable value.
**My Core Services:**
* **🤖 AI Code Rescue & Remediation:** I conduct deep **AI code audits** to debug, refactor, and secure fragile codebases (especially those built with LangChain.js). I turn unmaintainable prototypes into stable, scalable assets ready for real users.
* **⚙️ Intelligent Workflow Automation & Integration:** I design and build digital assembly lines for your business. I offer a full spectrum of automation solutions:
* **Rapid Integration:** Using **Zapier, Make.com & n8n** to connect your existing tools and solve immediate process bottlenecks.
* **Custom API Development:** Building custom **Node.js** APIs and webhooks to connect proprietary systems or handle complex logic that no-code tools can't.
* **AI-Powered Decisions:** Infusing your workflows with intelligence using the **OpenAI API** to triage support tickets, qualify sales leads, or generate content automatically.
* **🚀 Custom AI Solution Development:** I architect and build bespoke AI solutions from scratch, from **Custom GPTs** and intelligent **AI Agents** to complex RAG (Retrieval-Augmented Generation) pipelines that leverage your private data.
* **👨🏫 AI Engineer & Career Mentorship:** I provide 1-on-1 coaching to help developers navigate the AI landscape, master tools like LangChain.js, and build a successful career in AI engineering and automation.
**My Tech Stack:**
* **Languages:** Node.js, TypeScript, JavaScript
* **Frameworks:** React, Next.js, Express.js, NestJS
* **AI / LLM:** LangChain.js, OpenAI API, LlamaIndex, Vector Databases (Pinecone, Qdrant)
* **Automation Platforms:** Zapier, Make.com, n8n
Ready to move past the prototype phase and build a real business? **Send me a message with your project details or book a session to get started.**
---
### Service Packages
* **Package 1: AI Code Audit & Production-Ready Roadmap**
* **Description:** Have an AI-generated MVP that feels unstable? I'll perform a comprehensive review of your codebase. You'll receive a detailed report identifying security vulnerabilities, performance bottlenecks, and a concrete, actionable roadmap to make your application **production-ready**. This is the perfect first step to de-risk your project.
* **Package 2: Intelligent Automation Workflow**
* **Description:** Let's put a core business process on autopilot. We'll map out a high-impact workflow and I'll build a robust automation to solve it. Ideal for **automating lead qualification**, **triaging customer support tickets**, or **streamlining content pipelines** using the best tool for the job—Zapier, Make, or custom Node.js scripts.
* **Package 3: Scalable AI MVP Development**
* **Description:** Need to build an MVP the *right* way? I'll architect and develop a **scalable MVP** from day one, using professional, spec-driven development practices. We'll build a strong foundation with clean, documented code and a modern stack (Node.js, React) to avoid the technical debt that plagues "vibe-coded" projects.
Software Engineer with 9.5+ years of experience in web development, backend development, and server architecture. Expertise in building and maintaining various web/backend solutions, from automobile websites to job portals to freelance platforms with live chat integration . Proficient in server architecture setup, deployment, and optimization.
I will give a **full refund** if I am not able to help.
With years of experience in finance, web3, and education, i specialize in developing cloud-based applications. I've led key roles in large projects, optimizing processes, server managements, and system performance for efficiency. My dynamic problem-solving approach drives creative solutions, always staying updated with the latest technical breakthroughs to enhance my skills.
I have experience in Python for more than 10+ years. I have been using Python in Embedded systems. I have experience in Making Test setup for various Embedded device for automation testing.
I'm a full stack software engineer, technical writer and computer science educator. I enjoy testing, debugging, refactoring, application design, maintaining projects and teaching.
My primary technologies are JavaScript, TypeScript, React, Express (PERN stack), Playwright, Puppeteer, Python, Flask and C. See my [Stack Overflow tags](https://stackoverflow.com/users/6243352/ggorlen?tab=tags) for more technologies ordered roughly by my interest and experience.
In addition to Stack Overflow, I'm active on [Code Review Stack Exchange](https://codereview.stackexchange.com/users/171065/ggorlen). Feel free to peek at a few of these reviews to get a sense of the insights I can offer your code.
I'm looking forward to hearing about your project!
_<sub>Profile picture by the wonderful [Emily Huston](https://emilyhuston.github.io) ❤️</sub>_
Software Contractor and Senior iOS Engineer (Swift, RxSwift, SwiftUI, Combine, UIKit)
Mentoring and focusing on the essentials, foundations and best practices of Software engineering and development.
Swift, SwiftUI, clean code, Test Driven Development, Design Patterns, Software principles.
Expert with MVVM, VIPER and The Composable Architecture (TCA) and more architectures.
Building and deploying Startup and Enterprise apps to the App Store.
Born in Spain🇪🇸, living in the UK🇬🇧, originally from the Philippines🇵🇭.
- 8+ years of commercial experience building iOS applications in Swift.
- Full Stack Developer. MERN stack. Cypress, Jest
- 3 years of experience with React Native and bridging applications from Swift to React Native.
_________________
Are you a freelancer looking to build a new app?
Do you need a prototype for an app?
Do you have a design and need a developer to build your app?
Are you a company looking to outsource or build an app?
Let's talk if you answered yes to any of the above questions.
I provide solutions for startups offering the best options to save you time and keep your business growing.
_________________
**Paradigms**: Object-oriented and Functional/Reactive programming.
Creating meaningful and enjoyable UI transitions to keep the user engaged and access their data in real-time.
Worked on production apps extensively with:
- Swift
- SwiftUI
- Combine
- Async/await
- RxSwift
- Firebase
- Node.js
- Cocoapods
- Swift Package Manager
Fundamental knowledge and teaching software architectures:
- **MVC** (Model, View, Controller)
- **MVVM** (Model, View, View Model)
- **TCA** (The Composable Architecture)
Software design principles: SOLID to improve orthogonality, flexibility and reusability of components.
Communication of **data** from view controllers to any other view such as UIAlertController, container views, UITableViewCells, UICollectionViewCells, etc.
Options to communicate data can be achieved through the use of weak delegates + Segues with Storyboards.
Other options include using Databases.
**Storage**
- Firebase Real-time database, Firestore.
- MongoDB,
- UserDefaults
- CoreData
- Custom API (Facebook, Google, Github, your website, etc.)
Alternatively offering a different solution programmatically without using Segues from Storyboards to increase performance and code maintainability.
Several presentation styles, modals, over current context, custom, etc. with animations.
Native components are the way to go with performance and maintenance.
Working with UIKit, Foundation, SwiftUI
- UITableView + Headers + Footers and custom UITableViewCell
- UICollectionView + Headers + Custom UICollectionViewCell
- UICollectionViewFlowLayout
- Managing the Delegate and Data Source into their own components for efficient unit testing.
- SwiftUI Lists and Stacks
- iOS 13 and 14 Compositional Layouts in UICollectionView
SwiftUI focuses on a declarative way of writing code.
Teaching about the essentials of Functional Programming.
**Networking**
Native iOS
- URLSession
- Combine
Third-party, external
- Alamofire
- Moya
- PromiseKit
**Testing frameworks**
- XCTest (iOS native)
- Quick
- Nimble
____
I have experience creating Full stack applications connecting different services and stacks together. From iOS to Firebase, a custom backend and connecting 3rd party APIs to your application.
5+ years of experience building commercial and business iOS apps using different Software Architectures such as MVC and MVVM and following the SOLID principles.
Adhering to Test-driven development along with pipeline automation and working closely with the Directors, team and customers to build a stable app on every release.
Delivering high-quality products for easy maintenance, robustness, and readability along with applying the Agile principles.
iOS networking and REST API implementations to gather data from the backend or other third-party providers.
With over 25 years in the software industry, I bring a robust mix of hands-on engineering and management expertise. Currently, I lead the teams for Gemini Code Assist at Google, where we develop and scale backend systems and extensions for both VSCode and IntelliJ to deliver high-performance code assistance.
As a startup founder and an innovator, I enjoy wearing multiple hats, diving into new technologies, and taking prototypes from rapid development to production-scale systems. Proficient in over 15 programming languages, I primarily focus on JavaScript, TypeScript, Node.js, Electron, and Web technologies, with occasional use of Python. My approach is rooted in scalable solutions and inspiring teams to deliver impactful results.
I'm a Pythonista who builds backend systems, Devops Automation, and Data Pipelines. I have also contributed to open-source projects like Pandas and Airflow.
I am a LinkedIn learning instructor and also run my own PythonToProject 5-week Online Bootcamp. I am a tech speaker and have presented at Pycon Australia, India and Berlin Buzzwords
I have been working in .net and javascript since 2008. I am a senior developer looking to mentor students and other new programmers. Let me help you understand the things that are driving you crazy.
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Frequently asked questions
How long do Integration Testing projects normally take?
The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance Integration Testing project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance Integration Testing request on Codementor, check out our article.
How much does it cost to hire a freelance Integration Testing developer?
We don’t charge anything when you post a freelance hiring request for Integration Testing developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.
What makes Codementor Integration Testing developers different?
We do a comprehensive technical and communications screen of all Integration Testing developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing Integration Testing developers’ user satisfaction rates.
What happens if I’m not happy with the freelancer’s work?
As a platform, we strive to ensure you’re always happy with your Integration Testing project’s results. If you’re unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.
For more answers to frequently asked questions, see here.
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