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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.
Full-stack software craftsman and technical leader with over 15 years of experience. Equally adept at system design, programming, technical leadership, mentorship, and business collaboration. Have a wide breadth of technical experience, but specialize in backend API development, relational databases, and web applications. Passionate about simplicity and efficiency.
I have worked at over a dozen companies large and small, in a handful of different domains. Also participated in hundreds of interviews, about half-and-half as the interviewer and the interviewee. I have given dozens of talks and training sessions on a variety of topics, mostly focusing on distributed systems, caching, and testing.
My top skills are Java, SQL, testing, and refactoring.
I have experience with formal academic and professional mentorship, and would love to help you skill up, solve a problem, or just nerd out with you today!
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 Developer with over 6 years of experience specializing in back-end engineering. Proven ability to design and build resilient, scalable micro-services using Java, Spring Framework, and cloud-native technologies. Consistently delivers high-performance software that enhances user experience and drives operational efficiency. Open to new challenges in Software Engineering roles.
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.
Modernizing systems across finance/trading, food-tech,aviation, e-commerce, and storage platforms. I am strongest in system design, performance tuning, and taking legacy services to stable, observable, scalable platforms on AWS. I have built data-heavy pipelines (including market data feeds / broker APIs) and shipped latency-critical improvements (e.g., reducing a sync flow from ~40 minutes to seconds with distributed caching). I like owning problems end-to-end: architecture, delivery, and production support.
You may go through some of my projects here : **[https://abhishakegupta91.github.io/](https://abhishakegupta91.github.io/)**
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
Seasoned Software Developer with 6+ years experience. Expert in Python, React, RxJava, Kotlin and NodeJs. Renowned for delivering maintainable and testable full stack Applications. Continually evolving with industry trends to drive innovation and user satisfaction. Passionate about superior software development and AI.
As a seasoned **Senior Software Engineer**, I bring a wealth of experience in full-stack development, with a strong focus on front-end technologies and quality assurance. I offer mentoring and consulting services in the following areas:
**React.JS & Angular:** Proficient in building dynamic, responsive web applications using React.JS and Angular. I can guide you through best practices, performance optimization, and advanced component design.
**CSS:** Expertise in CSS for crafting visually appealing and responsive user interfaces. I can help you master layout techniques, animations, and styling frameworks.
**Unit Testing:** Specializing in unit testing with Jasmine/Jest for JavaScript and JaCoCo for Java. I can assist you in setting up comprehensive test suites, writing effective test cases, and achieving high code coverage.
**Playwright Automation Scripts:** Experienced in writing robust automation scripts using Playwright. I can teach you how to automate end-to-end testing, ensuring your applications perform flawlessly across different browsers and devices.
With a commitment to high-quality code and efficient workflows, I aim to help you enhance your skills and achieve your project goals. Whether you're looking to improve your existing codebase or start a new project from scratch, I'm here to provide expert guidance and support.
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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?
We don’t charge anything when you post a freelance hiring request for Unit 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 Unit Testing developers different?
We do a comprehensive technical and communications screen of all Unit 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 Unit 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 Unit 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.