Our analysts identified the top outsourcing software development companies in California providing cutting-edge services that answer key business problems, from building technical software, designing websites or mobile apps to integrating operating systems and more. Narrow down your search by team size, budget, reviews and more to select the best developer for your company’s needs.

Best California Outsourcing Developers

9 Companies-Rankings updated: August 20, 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 ×
  • HIGH QUALITY SOFTWARE COMPANY IN VIETNAM

    With over 10 years of expertise, AgileTech Vietnam stands at the forefront of delivering innovative technology solutions across a wide range of industries. Our team of 300+ skilled developers has completed more than 1,000 successful projects, ranging from dynamic startups to large-scale enterprises...

    Location
    Irvine, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    50 Projects Listed

    AgileTech Services

    • Web Development
    • WordPress Website Design
    • UI/UX Design
    • eCommerce Development
    • Web Design
    • Software Development
    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Clingme
    • Luxstay
    • Lian
    • Ferosh
    • Alosong
    • Stardary
    • Tizo
    • Jupviec
    Data sourced from the agency's DesignRush profile

    AgileTech Reviews & Testimonials

    • Noah Petraitis
      Noah Petraitis Project Manager at National Technologies (NTI)
      5.0

      Mobile App Development Review from Noah Petraitis

      AgileTech excelled in supporting our project from initial mock-ups through to the final delivery on the App Store, incorporating data analytics that we could easily share with our customers. The scope of work included mock-up creation, UI/UX design, interactive prototyping, app development, rigorous testing, and setting up a secure production environment on AWS, culminating in the apps release on both iOS and Android platforms.

    • Selva Jayaraman
      Selva Jayaraman Owner at Business Integra Inc
      5.0

      Software Development Review from Selva Jayaraman

      Working with AgileTech has been an amazing experience, especially when it comes to creating a personalized e-learning program for our IT services business. We were pleasantly surprised by how adaptable and scalable the platform developed by the AgileTech Team was. Their proficiency with user-friendly course administration and community participation technologies enabled us to provide a thorough instructional resource catered to our customers' particular requirements. The platform has greatly improved our operational efficiency, and we are amazed by its capacity to manage heavy traffic with ease and offer comprehensive reporting and analytics. The platform remained successful and user-friendly because of the team's dedication to continuous support and their quick response to criticism. For any organization looking to create innovative and reliable digital solutions, we wholeheartedly recommend AgileTech as a partner.

    • Preci Capiral
      Preci Capiral Owner at TechnoSphere, Inc.
      5.0

      Software Development Review from Preci Capiral

      AgileTech provided a superb Learning Management System (LMS) that creatively and precisely addressed the intricate needs of our organization. Within a scalable, completely customizable platform, the LMS made it possible to create comprehensive courses, administer student tests, engage the community, and obtain real-time data insights. AgileTech's modular and agile approach made sure that every component, from the user-friendly course builder to the sophisticated analytics and communication tools, was customized to meet our demands despite the difficulties of developing such a feature-rich system. In order to guarantee perfect scalability and zero downtime, even with high user concurrency, AgileTech used a potent tech stack that included PHP, React, and AWS. Their post-launch assistance, which included frequent training sessions and upgrades, gave our staff the means to fully use the LMS's potential. This project was a testament to AgileTech's technical skill, rapid deployment, and dedication, making them an outstanding choice for educational technology development.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Solving complex problems with design and technology since 2005.

    We create digital products that streamline operations, grow your audience, and boost business success. Partnering with visionary brands, we transform ideas into impactful solutions using innovative design and technology. Discover how our Software Development expertise can elevate your next project...

    Location
    Los Angeles, California
    Number of Employees
    250 - 499
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    24 Projects Listed

    Infinum Services

    • Web Development
    • Web Design
    • Mobile App Development
    • UI/UX Design
    • Software Development
    • Cloud Consulting
    • DevOps Consulting
    • Cybersecurity
    • Staff Augmentation
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Porsche
    • Nike
    • CITI
    • Royal Caribbean
    • Philips
    • Bayer
    • T-Mobile
    • P&G
    • Universal
    • Virgin Mobile
    Data sourced from the agency's DesignRush profile

    Infinum Reviews & Testimonials

    • Matic Debelak
      Matic Debelak Management Board Member at Modra zavarovalnica, d.d.
      5.0

      Mobile App Development Review from Matic Debelak

      Workstream 1: research and product strategyWorkstream 2: ETP release Technology : Vendor use Flutter framework, which allows one programming language and one codebase to create two different apps (for iOS and Android). Clearly defined roles and responsibilities, communication is clearly and respectfully, very effective project methodology, trying to understand every time how their activities fits into mission of Modra zavarovalnica, respect each member of team, etc.

    • Claus-Peter Mueller
      Claus-Peter Mueller Managing Director at NLB Lease&GO doo
      5.0

      Software Development Review from Claus-Peter Mueller

      We have engaged Infinum to develop an app that would digitalise our leasing process. From creating the initial offer through the necessary financing application and client identification to the final signature – all the steps required to successfully lease a vehicle or other object can be performed in-app, freeing the users of friction and having to deal with tedious paperwork.The app itself in the background has 30+ integrations, while keeping a seamless and quick to follow process on the front for our users. That application is in production and Infinum is responsible for maintaining it and further improving. After the initial development, we have additionally expanded our scope from vehicles to other equipment. They have also developed a Leasing widget, product which enables quick financing model while purchasing a vehicle online on car seller marketplace pages. At this moment, we are still in partnership with Infinum, and their engagement is mainly focused on localising the app to other countries and supporting us in our further business expansion. The work performed was done in Ruby on Rails and React technology, with support of other services.

    • Anonymous VP of Marketing at SaaS Company
      5.0

      Web Design Review from Anonymous

      Thanks to Infinum's website refresh, the client has seen an almost 100% improvement in their website's conversion rates. The team excels at project management, using the client's own proprietary tool and also Figma very well. Their proficiency in design, delivery, and client relations stands out.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Certified E-Commerce Development Company

    Certified E-Commerce Development Company...

    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    16 Projects Listed

    Dinarys Services

    • eCommerce Development
    • Web Development
    • IT Services
    • Web Design
    • Mobile App Development
    • Staff Augmentation
    • Digital Strategy
    • Digital Services
    • Software Development
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Aroma Kava
    • LastBid
    • Budu Sushi
    • Magento 2 Migration
    • Rite Space
    • Bookbreakrs
    • Can
    • Vivat
    • Udifo
    • ServisBook
    Data sourced from the agency's DesignRush profile

    Dinarys Reviews & Testimonials

    • André Schörnig
      André Schörnig Marketing-Manager at myfelt GMBH
      5.0

      eCommerce Development Review from André Schörnig

      We have been working with Dinarys on our Shopify store for quite some time, and the experience has been great. From the very beginning, communication was clear, efficient, and reliable. The Dinarys team consistently delivered detailed proposals, stuck to agreed timelines, and offered well-structured solutions tailored to our needs. Their technical expertise is impressive, but what really sets them apart is their proactive attitude and genuine commitment to our project. Whenever we had questions or changes, they responded quickly and constructively. Its a true pleasure to work with a partner who feels like an extension of our own team. Highly recommended!

    • Nissrine Kohen
      Nissrine Kohen Sr. Backend Shopware Developers at H1 Webdevelopment
      4.5

      Web Development Review from Nissrine Kohen

      Weve been working with Dinarys for quite some time now, mainly collaborating on Magento and Shopware development projects. Their developers consistently show solid technical expertise and a good understanding of our expectations and workflow.Communication is generally smooth, and response times are quick. Whenever issues arise, the team is open to feedback and acts quickly to improve. Over time, weve seen a positive evolution in their proactiveness and alignment with our teams way of working.They are flexible and collaborative, and its clear that they genuinely aim to build long-term partnerships. For the quality delivered, we feel the pricing is fair and transparent.All in all, weve been satisfied with our cooperation and would recommend Dinarys as a development partner, especially for companies looking for experienced backend developers in Magento and Shopware.

    • Andrew White
      Andrew White Review from Google
      5.0

      Andrew White's Review Sourced from Google

      I'm wasn't in the German office, but i had experience of communication with this company! I can say that it leaves the warmest feelings in the my heart! Guys you are the best!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Full-Service E-commerce Development Company

    An ecosystem for B2B/ B2B2C websites on multiple platforms with robust technology and a customer-oriented mindset...

    Location
    Los Angeles, California
    Number of Employees
    250 - 499
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    10 Projects Listed

    BSS Commerce Services

    • eCommerce Development
    • Web Development
    • Software Development
    • Web Design
    • UI/UX Design
    • IT Services
    • Mobile App Development
    • Software Testing
    • Cybersecurity
    • WordPress Website Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • PixePrint
    • OlogsBabyArtikel
    • HoolaHoola
    • Dippytee
    • Screenshotsinc
    • Frameless Hardware Company
    • Skandiastyle
    • Café Du Cycliste
    • Parfymonline
    • Supersports Vietnam
    Data sourced from the agency's DesignRush profile

    BSS Commerce Reviews & Testimonials

    • Anthony G
      Anthony G Review from Google
      5.0

      Anthony G's Review Sourced from Google

      It's the best app to sell Multichannel on Shopify. Otherwise you would have to pay 2000$ for Shopify PLUS.Support and Features are Great! Thats a company you want to work with together as a B2B seller!Especially thank you Jonas!

    • James Batson
      James Batson Review from Google
      5.0

      James Batson's Review Sourced from Google

      Great company with excellent customer service. Helped us solve an issue on our Magento 2 website, highly recommend to anyone looking for Magento plugins or development.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Femtomax Inc.

    VerifiedVerified by the DesignRush team for authenticity and credibility.

    Technology Solutions for You.

    Access information technology professionals with experience of working with startups to Fortune 500 companies without breaking the bank. Our services are well suited for retail, manufacturing, startups and healthcare businesses. Talk to us for a free consultation...

    Location
    San Jose, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    3 Projects Listed

    Femtomax Inc. Services

    • Web Development
    • Mobile App Development
    • Software Development
    • IoT
    • AI Development
    • IT Services
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Ceeyes Mobility Solutions Pvt. Ltd.
    • Pioneer Property Zone
    • Idaax Technologies Pvt. Ltd.
    Data sourced from the agency's DesignRush profile
  • We Build Tomorrow, Today

    With 15 years of experience, we specialize in developing startups, cryptocurrency exchanges, cashback platforms, Telegram bots, and complex software solutions for clients across the USA and Europe. Our expertise guarantees tailored, high-quality solutions for diverse industries and business needs...

    Location
    San Francisco, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $60/hr

    Zavod-IT Services

    • Software Development
    • Web Development
    • UI/UX Design
    • eCommerce Development
    • Blockchain
    • AI Development
    • Mobile App Development
    • Business Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • RoasUp
    • Easy Lashes
    • Delofon
    Data sourced from the agency's DesignRush profile
  • Translating Ideas & Research to Market

    KritiKal Solutions is a technology design house and holds 22+ years of experience in AI, Computer Vision, Software Applications, Cloud and Mobile-based Solutions, Embedded Systems, Generative AI and Large Language Models. We specialize in R&D, product engineering, and innovation services...

    Location
    Los Angeles, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    4 Projects Listed

    Kritikal Solution Services

    • AI Development
    • Software Development
    • Mobile App Development
    • IoT
    • IT Services
    • Wearables
    • HR Outsourcing
    • Staff Augmentation
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Vector USA
    • BYJU'S
    • P&G
    • Columbus
    • Continental
    • Honeywell
    • ITC
    • Stryker
    • G&D
    • University of Berkeley
    Data sourced from the agency's DesignRush profile

    Kritikal Solution Reviews & Testimonials

    • Aakriti Bhatnagar
      Aakriti Bhatnagar Review from Google
      5.0

      Aakriti Bhatnagar's Review Sourced from Google

      Great place to work.Very good learning opportunity.Best place for freshers to learn and gain knowledge.Supportive and understanding colleagues.

    • Jobin John
      Jobin John Review from Google
      5.0

      Jobin John's Review Sourced from Google

      One of the best aspects of working at KritiKal Solutions is the opportunity to collaborate with talented professionals across multiple domains. The company promotes a culture of innovation, knowledge sharing, and continuous improvement.

    • twinkle kumari
      twinkle kumari Review from Google
      5.0

      twinkle kumari's Review Sourced from Google

      A great workplace that encourages continuous learning, teamwork, and professional growth. The management maintains an open-door policy, making it easy to share ideas and collaborate across all levels of the organization.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Trusted Software Engineering Solutions Provider based in Vietnam, With A Global Presence.

    As a trusted bespoke software development outsourcing company, we help business organizations tackle challenges of outdated software, inefficient processes, and poor digital presence...

    Location
    San Jose, California
    Number of Employees
    100 - 249
    Minimal Budget
    $10,000 - $25,000

    Trustify Technology Services

    • Software Testing
    • AI Development
    • Software Development
    • Mobile App Development
    • CRM Consulting
    • IT Services
    • Staff Augmentation
    • Cloud Consulting
    • DevOps Consulting
    • Web Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Takeda Pharmaceutical Company
    • KlikDokter
    • LK Technology
    Data sourced from the agency's DesignRush profile

    Trustify Technology Reviews & Testimonials

    • Crystal I'm
      Crystal I'm Review from Google
      5.0

      Crystal I'm's Review Sourced from Google

      Trustify Technology - Software Development Outsourcing is where I am working, and I am very satisfied. The software development team here is excellent and produces high quality products. The working environment is professional and colleagues support each other. The company also pays special attention to the personal development of employees. I am proud and highly recommend working at Trustify Technology.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Innovate, Code, Elevate Transforming Ideas into Reality.

    H.R. Software Solutions Pvt. Ltd. is a leading IT company offering cutting-edge software development, web solutions, and digital marketing services. We specialize in ERP, CRM, mobile app development, and AI-driven solutions for businesses of all sizes. With a customer-centric approach, we deliver innovative...

    Location
    Ontario, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $10,000 - $25,000

    H.R Software Solutions Pvt. Ltd. Services

    • Software Development
    • Web Development
    • Digital Marketing
    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Maddares
    • Riyadh Rehab
    • Taaheel
    • Salec
    • Enriched Academy
    • IOCL
    • Indian Railway
    • EDCIL
    • Noida Authority
    • BLK Hospital
    Data sourced from the agency's DesignRush profile

The Benefits Of Top Outsourcing Companies In California

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