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Intern Mern Full Stack Developer Jobs in California

Teserac, Inc.

Full Stack Developer

Santa Clara, CA · On-site

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

As a Full Stack Developer you will own features end to end, from the ingestion path that pulls telemetry off a BMS in a live facility, through the time-series layer that stores it, to the dashboard ...

Agate Group

Full Stack Developer

Rocklin, CA

What We're Looking For We are seeking a passionate full stack engineer with experience in developing web applications from start to finish on their own. This includes but is not limited to the ...

Robot.com

Full Stack Developer

San Francisco, CA · On-site

We are seeking a Full Stack Developer to design, build, and maintain both frontend and backend software systems. You will collaborate with cross-functional teams to define technical requirements ...

Corpay

Full Stack Developer

Sacramento, CA · On-site

$140K - $175K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

What We Need Corpay is currently looking to hire a Full Stack Developer within our Corpay Complete division. This position falls under our Corpay Payables line of business and is in Elk Grove, CA. In ...

Triunity Software

Java full stack Developer

Oakland, CA · On-site

$90K - $100K/yr

  • Medical

  • Dental

  • Retirement

Health insurance Role:- Java full stack developer Location:- Toronto Canada - * Develop and ... Be it expert or intern Triunity always always value its own people and give them platform to excel ...

Galent

AI Full Stack Developer

Santa Clara, CA · On-site

AI Full Stack Developer Location: Santa Clara, CA (5 Days Onsite) Job Summary * We are seeking highly motivated Full Stack Developers with strong software engineering fundamentals and hands-on ...

Dapi

Full Stack Developer

San Francisco, CA · On-site +1

We are looking to hire a passionate full-stack engineer who can contribute to the design, development, maintenance and implementation of our API services. You will be joining our talented team of ...

Easy Street Capital

Full Stack Developer

Irvine, CA · On-site

$90K - $110K/yr

  • Medical

  • Retirement

  • PTO

We are looking for a skilled and motivated Full Stack Developer to join our growing team, building innovative solutions in a fast-paced, collaborative environment. This is a great opportunity for ...

Dapi

Full Stack Developer

San Francisco, CA · On-site +1

We are looking to hire a passionate full-stack engineer who can contribute to the design, development, maintenance and implementation of our API services. You will be joining our talented team of ...

Mercor

Senior Full Stack Developer

San Francisco, CA · Remote

$80 - $130/hr

Design, develop, and maintain full-stack applications using Python . * Build and integrate APIs and MCP-based systems . * Collaborate closely with engineering and product teams to enhance system ...

Jobsbridge

Java Full Stack Developer

Los Angeles, CA

$56.50 - $73/hr

Full Stack Developers with good J2EE experience. Strong background in J2EE development, Spring framework, Java Script (Angular JS, Node JS) - Strong knowledge of data structures and OOPs design ...

eTrigue

(1) Application Full Stack Developer

San Jose, CA · On-site

  • Medical

  • Retirement

  • PTO

Overview eTrigue is seeking an experienced and highly motivated Application Full Stack Developer to join our dynamic team in San Jose, CA. The ideal candidate will have extensive experience across ...

eTrigue

(1) Application Full Stack Developer

San Jose, CA · On-site

$110K - $125K/yr

  • Medical

  • Retirement

  • PTO

Overview eTrigue is seeking an experienced and highly motivated Application Full Stack Developer to join our dynamic team in San Jose, CA. The ideal candidate will have extensive experience across ...

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

Intern Mern Full Stack Developer information

What is the difference between Intern Mern Full Stack Developer vs Intern Front End Developer?

AspectIntern Mern Full Stack DeveloperIntern Front End Developer
SkillsProficiency in MongoDB, Express.js, React, Node.js, JavaScriptProficiency in HTML, CSS, JavaScript, React or Angular
Work EnvironmentDevelops both client-side and server-side applicationsFocuses on client-side interface and user experience
Common UsageUsed in full-stack development teams across startups and tech companiesPrimarily in front-end teams for UI/UX design

The Intern Mern Full Stack Developer role involves working on both front-end and back-end development using the MERN stack, providing a broader scope of development tasks. In contrast, the Intern Front End Developer focuses solely on creating and optimizing user interfaces. Both roles require JavaScript knowledge, but the full stack role demands familiarity with server-side technologies, making it more comprehensive in scope.

What types of projects can an Intern MERN Full Stack Developer expect to work on, and how are tasks typically assigned within the team?

As an Intern MERN Full Stack Developer, you can expect to work on a variety of projects ranging from building new web applications to maintaining and improving existing ones. Tasks are usually assigned based on project requirements and your skill level, often starting with smaller features or bug fixes, allowing you to gradually take on more responsibility. You'll collaborate closely with senior developers, designers, and QA testers, participating in code reviews and daily stand-ups. This structure helps you gain hands-on experience across the entire development stack while receiving mentorship and feedback to support your growth.

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

To thrive as an Intern MERN Full Stack Developer, you need foundational knowledge of JavaScript, HTML, CSS, and a basic understanding of MongoDB, Express.js, React, and Node.js. Familiarity with development tools like Git, npm, and code editors, as well as exposure to RESTful APIs, is typically expected. Strong problem-solving, eagerness to learn, and effective teamwork and communication skills help interns adapt and contribute to projects. These skills and qualities are crucial for building, debugging, and maintaining robust web applications in collaborative, fast-paced environments.

What is an Intern MERN Full Stack Developer?

Intern MERN Full Stack Developers are entry-level software developers who specialize in building web applications using the MERN stack, which includes MongoDB, Express.js, React.js, and Node.js. As interns, they typically assist with both front-end and back-end development tasks, gaining hands-on experience under the guidance of senior developers. Their responsibilities often include writing code, debugging applications, collaborating on team projects, and learning industry best practices. This internship provides an opportunity to develop technical skills and gain insight into the software development lifecycle.

What are the most commonly searched types of Mern Full Stack Developer jobs in California?

The most popular types of Mern Full Stack Developer jobs in California are:

What are popular job titles related to Intern Mern Full Stack Developer jobs in California?

For Intern Mern Full Stack Developer jobs in California, the most frequently searched job titles are:

What job categories do people searching Intern Mern Full Stack Developer jobs in California look for?

The top searched job categories for Intern Mern Full Stack Developer jobs in California are:

What cities in California are hiring for Intern Mern Full Stack Developer jobs?

Cities in California with the most Intern Mern Full Stack Developer job openings:

Intern Mern Full Stack Developer jobs near you
Infographic showing various Intern Mern Full Stack Developer job openings in California as of July 2026, with employment types broken down into 82% Full Time, 6% Part Time, 1% Temporary, and 11% Contract. Highlights an 83% Physical, 4% Hybrid, and 13% Remote job distribution.

Full Stack Developer

Teserac, Inc.

Santa Clara, CA • On-site

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 13 days ago

Job description

About the Role
Teserac builds Neuron™, an AI-native platform for data center observability, intelligence, and workflow automation. Neuron™ ingests real-time telemetry from thousands of meters, sensors, and building systems across heterogeneous sites; then gives operators the visibility to monitor, analyze, and act on power operations with full situational awareness. An embedded AI teammate works alongside them, detecting anomalies, correlating events, and surfacing recommendations around the clock.
As a Full Stack Developer you will own features end to end, from the ingestion path that pulls telemetry off a BMS in a live facility, through the time-series layer that stores it, to the dashboard an operator is watching at 2am.
This is a small team with real customers in production. Your code ships in days, not quarters, and it runs in facilities where being wrong has physical consequences. You will work directly with the Principal Software & Architecture Lead, Product, and Solution Engineering.
We move fast, we avoid bureaucracy, and we expect engineers to own outcomes rather than tickets.
Why You Would Be a Good Fit
You are a full-stack engineer who is genuinely comfortable on both sides of the line, and who gets interested rather than annoyed when the data is messy, the vendor's API is undocumented, and the protocol spec is a PDF from 2009.
You likely:
  • Build front to back. You can trace a value from a Modbus register to a rendered chart without handing off, and you know where it's likely to break.
  • Take databases seriously. You know that a query plan, an index, and a migration on a large table are engineering decisions, not configuration.
  • Have worked with real time-series data at a volume where naive approaches stop working, and you understand what that costs at read time and write time.
  • Debug production calmly. When CPU is pinned and a queue is backing up, you reason from evidence rather than restarting things.
  • Use AI tooling well. You get real leverage from Cursor, Claude Code, or similar, and your standards didn't drop when you started.

Key Responsibilities
Front-End Development
  • Build and maintain front-end interfaces for neuron™: real-time dashboards, alerting systems, capacity planning views, and operational workflow UIs.
  • Build UI components and workflows for the AI teammate: interaction panels, recommendation displays, approval workflows, and audit trails.
  • Optimize application performance for real-time data rendering, large dataset visualization, and responsive user experiences across device types.

Data ingestion and integrations
  • Build and maintain the ingestion path that brings telemetry from customer sites into Neuron™: edge collectors, MQTT over AWS IoT Core, queue-based workers, and normalization into a canonical metric model.
  • Write integration modules against real building and power systems; Siemens Desigo, Schneider PME and EcoStruxure, Niagara, Eaton, and generic BACnet, Modbus, and SNMP sources.
  • Own the correctness of what lands: point mapping, unit and phase semantics, deduplication, and backfill.

Time-series platform
  • Develop against PostgreSQL and TimescaleDB: hypertables, continuous aggregates, compression, and retention.
  • Design schema and migrations that stay safe as tables grow into the billions of rows.
  • Find and fix the performance problems that only appear with real customer data volumes.

Product surfaces
  • Build operator-facing features in React and TypeScript: real-time dashboards, alarm and ticket workflows, power-flow visualizations, and the interfaces the AI teammate acts through.
  • Keep large, data-dense views fast and responsive.

Quality and operations
  • Write tested, reviewed code; contribute to CI/CD and automated testing.
  • Troubleshoot production issues across the stack and share in on-call as the platform scales.

Why Teserac
Teserac is AI-native observability and workflow automation purpose-built for mission-critical physical infrastructure. We are not building incremental improvements to legacy tools. We are re-architecting how data centers see, understand, and act on their own operations.
  • Ship features that directly impact how some of the world's most critical AI infrastructure is powered and managed.
  • Small engineering team where every developer has outsized impact and direct visibility into product decisions.
  • Work at the intersection of AI, real-time systems, and physical infrastructure - a rare and technically compelling combination.
  • Competitive compensation with meaningful equity upside; grow with the company from Series A through scale.

Requirements
  • 7+ years building and shipping production software across the stack.
  • Strong Python, ideally Django. Our backend is Django and Celery; this is the language you will write most days.
  • Strong PostgreSQL. Comfortable with schema design, query performance, and writing migrations you would run against a live production database.
  • Practical time-series experience. TimescaleDB specifically is ideal; deep experience with another time-series or high-volume streaming store transfers.
  • Solid React and TypeScript, and the judgment to keep a data-heavy interface fast.
  • Experience with asynchronous and event-driven systems: task queues, pub/sub, streaming, or WebSockets.
  • Comfortable on AWS. We run ECS Fargate, RDS, ElastiCache, and IoT Core.
  • Able to work independently, define your own scope from a rough requirement, and ship.

Preferred Qualifications
  • Industrial or IoT telemetry experience; BMS, EPMS, DCIM, SCADA, or similar OT data sources.
  • Hands-on with industrial protocols: BACnet, Modbus, SNMP, or vendor BMS APIs.
  • Data center infrastructure familiarity; power distribution topology, UPS and PDU behavior, or PUE.
  • Built observability or monitoring products, whether commercial or internal.
  • Early-stage startup experience, Seed through Series B.

Benefits
  • Health Care Plan (Medical, Dental & Vision)
  • Paid Time Off (Vacation, Sick & Public Holidays)
  • Free Food & Snacks
  • Stock Option Plan
  • 401(k)

Apply