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Top freelance Unit Testing developers available to hire
I am a **Multi-talented** professional adept in **Full Stack Web Development**, **Web Security Research**, and **Robotics Engineering**. As a dedicated Web Security Researcher and ethical hacker, I uncover vulnerabilities and mitigate security risks, bridging the gap between development and cybersecurity. Additionally, as a Robotics Engineer, I design and build sophisticated robotic systems, applying my deep understanding of mechanics, electronics, and programming. Passionate about crafting clean, scalable code and innovative robotics solutions, I contribute to projects that prioritize both robust development, cybersecurity practices, and cutting-edge robotic technology.
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.
Hey! 👋 I’m Pradeep — a **Web and Mobile App Developer with 6+ years of experience** building scalable, real-world applications.
On *Codementor*, I work with:
- Clients who need help building or fixing projects
- Developers looking for mentorship or debugging help
- Job seekers preparing for frontend roles
Whether you’re launching an app, scaling a codebase, or looking to level up — I’ve got you covered.
Senior Software Engineer | Full Stack Senior .NET Developer with over 20 years of experience in both
greenfield and brownfield development, designing, developing, and optimizing complex, scalable
applications across legal, healthcare, government consulting, retail workforce management, benefits
administration, and programmatic media advertising. Proven ability to lead teams, mentor developers,
and implement solutions for complex systems while adhering to best practices and modern design
patterns
I’m a backend .NET developer with 7 years of experience in SCRUM, Azure DevOps, Git, .NET and C#. I strive to be a trusted reference in development and software design, sharing best practices and driving the creation of robust, scalable solutions.
Hello
I have been working in the market for the past 10 years.
in the field of Database, SQL, Oracle, SQL Server, MySQL, NOSQL,DWH,ETL ,reporting and BI tools.
Have knowledge of multiples domain areas
such as Finance & banking ,Telecom, health care, Tax & Legal and FMCG
Hi everyone!
I am a Software and QA Architect with a strong background on designing, developing and testing complex applications.
Currently, I am the Head of QA of an insurtech company, which is a really exciting sector inside the software development industry.
In my daily basis I perform both Software and QA Leadership tasks as well Software And Automation Architecturing, as well as designing Unit tests, Integration, and so on.
My main goal is to help organizations and individuals to achieve the maximum level of quality in terms of development and automated testing.
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.
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Frequently asked questions
How long do Unit 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 Unit 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 Unit Testing request on Codementor, check out our article.
How much does it cost to hire a freelance Unit Testing developer?
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What makes Codementor Unit Testing developers different?
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What happens if I’m not happy with the freelancer’s work?
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