Best California Node.js Development Companies

5 Companies - Rankings updated: September 03, 2026

Each agency listed on DesignRush is assessed for industry expertise and customer testimonials are evaluated in order to provide you with a vetted selection. Certain listings represent paid partnerships.

United States × California × Node.js Development × Insurance × $25,000 - $50,000 × Clear Filters
  • Diffco

    Verified Verified by the DesignRush team for authenticity and credibility.

    Your trusted AI software development partner

    Diffco is a software development company that builds cross-platform mobile apps, bespoke SaaS portals, custom database architectures, and admin management panels. The studio deploys clean Python, Node.js, React, and Swift codebases alongside automated testing setups and CI/CD pipelines engineered for...

    Top Services:

    • AI Development
    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Web Development
    • Show more
    Location
    San Jose, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $110/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    31 Projects Listed

    Diffco Services

    • AI Development
    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Web Development
    • eCommerce Development
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Mars
    • Food Rocket
    • FlashGrid
    • Nokia
    • Instreamatic
    • Quire
    • Legionfarm
    • Latoken
    • Genius One
    • Shift
    Data sourced from the agency's DesignRush profile

    Diffco Reviews & Testimonials

    • Oleg Sotnikov
      Oleg Sotnikov CEO at AppMaster
      5.0

      AI Development Review from Oleg Sotnikov

      Diffco built a complex, production-grade AI agentic system and backend for our client's fintech platform owning architecture, AI/ML components, and AI agents in a security- and compliance-sensitive environment. They delivered on time and within budget, communicated proactively, and operated like part of our own team, taking ownership and suggesting better solutions throughout. Deep AI/ML and senior backend expertise. We'd happily work with them again.

    • Julia Platova
      Julia Platova VP Strategic Partnerships at OVA Solutions
      5.0

      Mobile App Development Review from Julia Platova

      We partnered with Diffco for a comprehensive software development project aimed at delivering a mobile application and backend system for our client. The goal was to create a seamless, secure, and scalable solution within a 4-month timeline and $50k-$200k budget. Diffcos team was highly professional from start to finish. They handled everything: UI/UX design, backend architecture, API integration, and deployment. After the launch, they continued to support us with maintenance and performance optimization. The application received positive feedback and has proven stable and scalable. Were highly satisfied with Diffcos expertise, commitment, and ability to deliver real results.

    • Max Shmatkov
      Max Shmatkov Manager at Centerligh
      5.0

      Mobile App Development Review from Max Shmatkov

      As an advantage of working with this company I’d like to note that their Agile development method is amazing! Diffco earned my trust through such approach and the team’s professional attitude.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your Product Engineering & Gen AI Partner

    Simform is a premier digital engineering company specializing in Product Engineering, Cloud, Data, Agentic AI, and Enterprise Platform Innovation. We help enterprises and high-growth ISVs build digital experiences and scalable, enterprise-grade products what work at scale...

    Top Services:

    • Software Development
    • Cloud Consulting
    • AI Development
    • Big Data Analytics
    • DevOps Consulting
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    8 Projects Listed

    Simform Services

    • Software Development
    • Cloud Consulting
    • AI Development
    • Big Data Analytics
    • DevOps Consulting
    • IoT
    • eCommerce Development
    • UI/UX Design
    • IT Services
    • Managed Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Sony Music (EMI)
    • Pepsico
    • Zep Inc
    • Intralinks
    • Nxt-ID
    • FreeWire Inc
    • Accent Inc
    • Mission Rabies
    • DoggyBnB
    • Drizzle Labs
    Data sourced from the agency's DesignRush profile

    Simform Reviews & Testimonials

    • Andrew Muroff
      Andrew Muroff CEO at Strainprint Technologies Ltd.
      5.0

      Software Development Review from Andrew Muroff

      We worked with Simform for many years ongoing software development on our core product, the Strainprint mobile outcomes tracker for medical cannabis patients. We have only positive things to say about their work product and attention to detail. We highly recommend them and will work with them again.

    • Robel Yemane
      Robel Yemane Head of Engineering at Privilee
      5.0

      Software Development Review from Robel Yemane

      I've been working with Simform for over six months now. The engagement began with bringing our subscription management platform in-house, and we've since expanded the partnership to other projects due to their broad skill set and consistent reliability. They've gone the extra mileeven over weekends and public holidaysto help us move faster when needed. Communication and project management have been excellent, with any issues swiftly addressed. It genuinely felt like Simform was invested in our success. Having worked with similar firms throughout my career, I can confidently say Simform stands out and comes highly recommended.

    • Russ Makhauri
      Russ Makhauri Front-End Engineer at Midas
      5.0

      Software Development Review from Russ Makhauri

      We worked with Simform to hire a front-end engineer for our SaaS platform. The process was well-organized, and their team was professional, responsive, and efficient. They quickly identified a candidate who met our technical requirements and ensured a smooth onboarding process. Simforms communication and project management were strong throughout the engagement. They were proactive in addressing feedback and remained flexible in adapting to our needs. While there is some room for improvement in developer vetting and quality assurance, their overall service was excellent. For companies looking to scale their development teams efficiently, Simform is a reliable partner. Their structured approach, responsiveness, and commitment to client satisfaction make them a great choice. We would recommend them without hesitation.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • You Think It, We'll Build It.

    Idea Maker is a U.S.-based software development agency helping businesses transform ideas into scalable digital products. Our expert team specializes equally in mobile apps, custom software, AI-powered solutions, and modern web platforms...

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Web Design
    • Show more
    Location
    Irvine, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $125/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    10 Projects Listed

    Idea Maker Services

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Web Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Plane Fax
    • Generac
    • Politifact
    • Outschool
    • Advance CPE
    • AES
    • Blodgic
    • Fujikikai
    • Yellowbook CPE
    Data sourced from the agency's DesignRush profile

    Idea Maker Reviews & Testimonials

    • Meghan Wallace
      Meghan Wallace Survive Out Loud at Survive Out Loud
      5.0

      Web Development Review from Meghan Wallace

      When you're launching a nonprofit from scratch, every resource matters and Tom stepped in with extraordinary generosity. He brought his team in to help build the Survive Out Loud website, and the result is something were genuinely proud of. Tom and his team didn't just build a site. They listened carefully, asked thoughtful questions, and translated our vision into something clean, professional, and aligned with our mission. They were patient, collaborative, and incredibly responsive throughout the entire process. For a small organization trying to get off the ground, this kind of support is transformational. We are deeply grateful for Tom and his team and would recommend them without hesitation

    • Kevin Nagel, MBA
      Kevin Nagel, MBA Founder & CEO at Export Orbital
      5.0

      Software Development Review from Kevin Nagel, MBA

      IdeaMaker did an amazing job developing our cutting-edge software. They took our concept and turned it into a fully functional, scalable software platform that truly brought our vision to life. Their technical expertise, clear communication, and problem-solving mindset made the entire process seamless. IdeaMaker consistently delivered high-quality work on time and with care. We couldn't have asked for a better development partner!

    • Amarind Tan
      Amarind Tan CEO at Virtual Assist
      4.8

      Software Development Review from Amarind Tan

      Idea Maker was fantastic to work with. They completed multiple website projects for my virtual assistant agency. Each time they over delivered. Besides that, they helped build some AI automations to help my customer support. That freed me up to focus on expanding my partnerships. I really love the fact that they can do just about anything technically. They truly are my technical back office!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Results Driven Strategies

    Facet Interactive is the go-to digital strategy agency. Our data-driven insight helps clients focus on higher-yield projects while we ensure strong returns through integrated marketing campaigns. We can step in as your product owner or CMO to provide direction when it comes to making informed product and...

    Top Services:

    • Web Development
    • AI Development
    • Software Development
    • IT Services
    • CRM Consulting
    • Show more
    Location
    El Segundo, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $199/hr
    Minimal Budget
    $25,000 - $50,000

    Facet Interactive Services

    • Web Development
    • AI Development
    • Software Development
    • IT Services
    • CRM Consulting
    • Managed Services
    • Big Data Analytics
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Amber Road
    • ROA
    • Neuroedge
    • drupalconnect
    Data sourced from the agency's DesignRush profile
  • Aiming to enhance the lives of billions of users with innovative technology solutions.

    BestPeers is a top software development company specializing in custom software, website development, UX/UI design, and full-stack solutions. With a focus on quality, innovation, and timely delivery, BestPeers creates consumer-centric tech solutions across diverse industries, ensuring client satisfaction and...

    Top Services:

    • Digital Strategy
    • Web Design
    • eCommerce Development
    • Web Development
    • UI/UX Design
    • Show more
    Location
    California City, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $25,000 - $50,000

    Best Peers Services

    • Digital Strategy
    • Web Design
    • eCommerce Development
    • Web Development
    • UI/UX Design
    • WordPress Website Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • S2Infinitum Softech Pvt Ltd
    • Shethink pvt ltd
    • AtmaGo
    Data sourced from the agency's DesignRush profile

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