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Intern Mern Stack Developer Jobs in California (NOW HIRING)

Skild AI

Full Stack Developer

San Mateo, CA · On-site

Position Overview We are seeking a Full Stack Developer to help build and maintain our cloud ... Experience with MERN stack. * Proficiency with WebRTC and Socket.IO * Knowledge of SQL and NoSQL ...

HPTech Inc.

Fullstack MERN Developer

Sunnyvale, CA · On-site

Design, develop, and maintain robust web applications using the MERN stack (MongoDB, Express.js, ReactJS, and Node.js). * Implement responsive user interfaces using ReactJS, Typescript, HTML, and CSS.

SynergisticIT

PYTHON DEVELOPER(REMOTE)

Berkeley, CA · On-site

$61.25 - $84.50/hr

Entry Level Programmer Synergistic IT is an organization focusing on Java/J2EE domain and providing ... MERN STACK, HIVE, PIG, SQOOP, OOZIE Familiarity working with C, C++, Core Java Regards, Manav Sr. ...

TIKAJ

We are looking for a Full Stack developer intern who is proficient with Javascript. Your primary focus will be with the development team to design, develop and debug web applications. * HTML5/CSS3 ...

Avani Technology Solutions, Inc.

Sr.Developer

Sunnyvale, CA · On-site

$65 - $85.75/hr

Cognizant is looking for Sr Developer 2. Job Summary : Primary Skill - Core Java Spring Rest Rest ... MERN stacks and related technologies. - Proficient knowledge in back-end API development using ...

Programmers.io

Java Full Stack AI Developer

Sunnyvale, CA · On-site

$61.50 - $79.50/hr

Backend - Java 17+, Spring Boot, Microservices architecture, Node.js * Frontend - Full stack MERN ... Cloud & DevOps - Kubernetes (EKS), Docker, CI/CD pipelines * Data & Messaging - PostgreSQL, Redis ...

Avathon

Full Stack Engineering Intern

Pleasanton, CA · On-site

$30 - $35/hr

As a Full Stack Engineering Intern, you will work on our AI-powered platforms that serve customers across renewables, supply chain, and industrial operations. You will develop and deploy both ...

VBeyond

Java Full Stack AI Developer

Sunnyvale, CA · On-site

$62.50 - $80.50/hr

Backend - Java 17+, Spring Boot, Microservices architecture, Node.js * Frontend - Full stack MERN ... Cloud & DevOps - Kubernetes (EKS), Docker, CI/CD pipelines * Data & Messaging - PostgreSQL, Redis ...

Equity Smart Home Loans

IT Manager

South Pasadena, CA · On-site

$85K - $110K/yr

... Web Developer. This role requires a tech-savvy operations leader who can bridge technical and ... MERN Stack (experience with full-stack development) * Trello (Project Management Software)

Equity Smart Home Loans

IT Manager

South Pasadena, CA · On-site +1

$85K - $110K/yr

... Web Developer. This role requires a tech-savvy operations leader who can bridge technical and ... MERN Stack (experience with full-stack development) * Trello (Project Management Software)

Tenex.AI Inc

Software Engineer Intern

San Jose, CA · On-site

We are seeking a highly motivated and versatile Full Stack Engineer Intern to join our core engineering team. We value individuals who are proactive, enjoy problem-solving, and are eager to learn and ...

PlusAI

Full Stack Engineer Intern

Santa Clara, CA

$19 - $65/hr

Build the Metrics Visualization Hub (Full-Stack): Design and ship an end-to-end web application ... Solid programming fundamentals (e.g., Python, SQL) and experience designing, building, and ...

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All JobsIntern Mern Stack Developer JobsIntern Mern Stack Developer Jobs in California

Intern Mern Stack Developer information

What is the difference between Intern Mern Stack Developer vs Junior Mern Stack Developer?

AspectIntern Mern Stack DeveloperJunior Mern Stack Developer
Experience LevelEntry-level, internshipEntry to early professional experience
ResponsibilitiesAssisting in development tasks, learning, supporting senior developersDeveloping features, fixing bugs, contributing to projects
Skills & CertificationsBasic knowledge of MERN stack, learning mindsetProficiency in MongoDB, Express.js, React, Node.js, some certifications
Work EnvironmentInternship programs, training-focusedFull or part-time roles in tech teams

The main difference between an Intern Mern Stack Developer and a Junior Mern Stack Developer lies in experience and responsibilities. Interns are typically students or beginners gaining hands-on experience, while Junior developers have some practical skills and contribute more independently. Intern roles focus on learning and support, whereas Junior roles involve active development and problem-solving.

What are Intern MERN Stack Developers?

Intern MERN Stack Developers are entry-level programmers who assist in building web applications using the MERN stack, which stands for MongoDB, Express.js, React.js, and Node.js. As interns, they work under the guidance of senior developers to gain hands-on experience in designing, developing, and deploying full-stack web applications. Their responsibilities typically include writing code, fixing bugs, collaborating with teams, and learning best practices in software development. This role is ideal for those looking to start a career in web development and gain practical experience with modern JavaScript technologies.

What types of projects and tasks can I expect to work on as an Intern MERN Stack Developer?

As an Intern MERN Stack Developer, you will typically participate in projects that involve building and maintaining web applications using MongoDB, Express.js, React, and Node.js. Your daily tasks may include writing and testing code, fixing bugs, developing new features under the guidance of senior developers, and contributing to team meetings. You'll likely collaborate with designers, backend engineers, and QA testers, gaining exposure to the full software development lifecycle. This hands-on experience is valuable for building your technical skills and understanding industry-standard development workflows.

What are the key skills and qualifications needed to thrive as an Intern MERN Stack Developer, and why are they important?

To thrive as an Intern MERN Stack Developer, you need a solid understanding of JavaScript, HTML, CSS, and the core components of the MERN stack: MongoDB, Express.js, React.js, and Node.js, often supported by relevant coursework or self-led projects. Familiarity with version control systems like Git, basic RESTful API development, and optionally cloud platforms or CI/CD tools is valuable. Strong problem-solving skills, eagerness to learn, and effective communication help you collaborate with teams and adapt to new tasks quickly. These skills are crucial for contributing to real-world projects, resolving development challenges, and growing into a proficient full-stack developer.
What are the most commonly searched types of Mern Stack Developer jobs in California? The most popular types of Mern Stack Developer jobs in California are:
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What cities in California are hiring for Intern Mern Stack Developer jobs? Cities in California with the most Intern Mern Stack Developer job openings:
Intern Mern Stack Developer jobs near you
Infographic showing various Intern Mern Stack Developer job openings in California as of July 2026, with employment types broken down into 100% Full Time. Highlights an 68% In-person, and 32% Remote job distribution.
MERN stack developer Sunnyvale, CA - CA - California

MERN stack developer Sunnyvale, CA - CA - California

Sierra Business Solution LLC

Sunnyvale, CA • On-site

Other

Posted 4 days ago

Job description

Job Title: MERN Stack Developer

Role Descriptions:

Key Qualifications

Full Stack Development:

Strong experience in JavaScript, TypeScript and MERN (MongoDB, Express.js, React.js, Node.js) with strong knowledge in front-end architecture and performance optimization and good experience with back-end and data management.

Build robust backend services using Node.js, ExpressJS

Develop and maintain RESTFul APIs and Event Driven services.

Good experience with Node.js Event Management

Deep understanding and experience with component architecture and state management

Strong experience with Node NPM Ecosystem

Expertise in React & Core [removed] Deep understanding of React fundamentals, including components, props, state, etc. Expertise in advanced JavaScript features, asynchronous programming (promises, asyncawait), and TypeScript.

Asynchronous Programming & Multi-threading: Very good hands-on experience with asynchronous patterns (callbacks, Promises, asyncawait) in JavaScript. To add-on, good experience of Node.js event management (event loop and how to leverage its single-thread operations efficiently). Understanding of utilizing built-in libuv thread pool for CPU-intensive tasks, even though JavaScript code runs on a single thread.

System Design and Architecture:

Strong experience buildingdesigning distributed systems leveraging Apache Kafka (Producers, Consumers, Streams) - also for asynchronous programming

Implement Caching strategies using Redis to optimize performance

Build and design scalable microservices also ensuring high availability

Experience with Event-Driven and streaming architectures

API and Automation:

Experience building and maintaining API automation

Cloud and CICD:

Deploy and manage services using Kubernetes

Work with CICD pipelines for automated build, test and deployment

Data and Messaging:

Strong experience with MongoDB for including advanced querying, indexing for performance and sharding aspects for scalability.

Build real-time and batch pipelines using Kafka

Handling data consistency and performance tuning

Performance and Reliability:

Optimize front-end performance (lazy loading, code splitting, caching)

Experience with improving back-end performance and scalability under high load

** All submissions must have LinkedIn id of Candidate**

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