Looking for staff augmentation services in California to enhance your team's capabilities? DesignRush is here to help you connect with trusted agencies that have partnered with brands like VMware and Pizza Hut. With over 1M monthly visitors and 40,000+ vetted agencies, our platform is designed to help you find the right talent for your needs. Compare providers by industry expertise, client type, budget, reviews, team size, and portfolio.
Best California Staff Augmentation Company Rankings
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.
United States × California × Real Estate × $25,000 - $50,000 ×Clear Filters
BitsWits is the top mobile app development company in the US, creating innovative mobile applications that help businesses across industries increase efficiency, engagement, and sales. Our top mobile app developers utilize cutting-edge technologies to build high-performing, intuitive mobile solutions that...
Top Services:
Mobile App Development
Software Development
VR/AR
Blockchain
AI Development
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Location
Los Angeles, California
Number of Employees
100 - 249
Average Hourly Rate
$25/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
12 Projects Listed
BitsWits Services
Mobile App Development
Software Development
VR/AR
Blockchain
AI Development
Staff Augmentation
Web Development
Wearables
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
FitNow
Wisu
Soul Scribe
Grease Monkey
Beats
Data sourced from the agency's DesignRush profile
BitsWits Reviews & Testimonials
Sydney Malone Implementation Engineer at Translucent Services
5.0★
Mobile App Development Review from Sydney Malone
With the development of our Mobile App, BitsWits performed a fantastic job. Their team was quick to respond and produced a great application that runs smoothly on all platforms. We are quite happy with the result.
Benson Sung Founder at D2C Design
5.0★
Mobile App Development Review from Benson Sung
They created a Mobile app for Medical services, and patient management has changed greatly as a result. The app works well with our current systems, is safe, and is simple to use. Their team produced a top-notch product on schedule while paying close attention to our unique requirements. We are really pleased with their work and heartily recommend BitsWits to anyone in need of app development services.
Steve Garry Senior 3D Animator at Treehouse Digital
5.0★
Mobile App Development Review from Steve Garry
The outcomes of our collaboration with BitsWits to develop an Online Food delivery app were outstanding. Real-time tracking is integrated into the app, which makes it easy to use and has significantly enhanced our customer support. Their development staff was quick to respond and took care of all of our requests. We couldn't be more pleased with the result!
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Diffco is a San Francisco AI-first software engineering partner for growth-oriented teams. We embed senior engineers and product strategists who turn AI vision into shipped, revenue-driving products. Our team has spent the last 18 years building: SaaS platforms, web & mobile apps, and AI products...
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
Ivan Pasichnyk CEO at WeLabelData
5.0★
AI Development Review from Ivan Pasichnyk
We brought Diffco in to deliver the AI and computer vision components for one of our clients, an image generation startup. Because the work sat inside our own client relationship, we needed a partner we could trust to operate at our standard without us managing them day to day - and that is exactly what we got. Diffco owned the technical approach, built the computer vision and AI layer, and delivered the full scope in three months, on schedule. The engineering quality was high, they raised the right questions early instead of late, and they handled the confidentiality the project required without us having to chase it. After delivery they stayed on to support the system, which mattered to us as much as the build itself. When you subcontract a technical project inside your own client relationship, the risk is that the partner makes you look bad. Diffco did the opposite. They've earned our trust and we'd work with them again.
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 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.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
VerifiedVerified by the DesignRush team for authenticity and credibility.
Full-cycle software development powerhouse
Since 2013, we've delivered 300+ digital products across 17 countries, empowering brands like Porsche, Panasonic, Transparency International, Heinemann, CBRE, and dozens of ambitious startups and scaleups...
Top Services:
Mobile App Development
Software Development
Staff Augmentation
AI Development
Web Development
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Location
San Francisco, California
Number of Employees
100 - 249
Average Hourly Rate
$45/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
24 Projects Listed
Empat Services
Mobile App Development
Software Development
Staff Augmentation
AI Development
Web Development
IoT
Managed Services
VR/AR
CRM Consulting
DevOps Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Porsche
Heinemann Duty-Free
Panasonic
Obimy
CBRE
Restream
FuelFinance
Transparency International
Data sourced from the agency's DesignRush profile
Empat Reviews & Testimonials
Angie Tromley-Morales, PMP CEO at House Caddy
5.0★
Mobile App Development Review from Angie Tromley-Morales, PMP
We hired Empat to design and build the MVP of House Caddy, a household management app that keeps receipts, warranties, manuals, and repair history in one place, with reminders for expiring warranties and maintenance. The product also helps homeowners prepare a full digital home history for future property transfers.Empat delivered end-to-end work: discovery, UX/UI design, Flutter mobile development, and a Python backend. They implemented a clear flow where users first create home appliances/systems and then attach documents and repairs to each item.A major highlight was Empats AI expertise. AI features simplify the entire user journey by auto-filling appliance details from photos/docs/links, assisting with utility provider setup, and importing contacts to speed up adding contractors. This reduced manual input and made onboarding fast and intuitive.Communication was excellent, with proactive brainstorming, clear sprint updates, and on-time delivery. The MVP is market-ready, early feedback is very positive, and Empat proved to be a reliable, product-driven partner with strong mobile, backend, and AI capabilities.
Vitalii Drach CEO at RD2
5.0★
Mobile App Development Review from Vitalii Drach
We collaborated with this team to develop custom software for tracking our client base and analyzing performance metrics. The solution allows us to monitor client success in real time, visualize key trends, and make data-driven marketing decisions.The Empat team was professional, communicative, and highly attentive to our needs. They quickly understood our workflow and created a system thats both intuitive and scalable. Thanks to their work, weve streamlined our internal processes and gained much better visibility into our clients results.Were very satisfied with the outcome and would definitely recommend Empat to anyone looking for a reliable software development partner.
Namik Abdulzade cto at Paymonix
5.0★
Software Development Review from Namik Abdulzade
Collaborating with this team has been exceptional from beginning to end. They quickly grasped our goals and delivered a scalable, high-quality payment platform with seamless integrations and an intuitive interface. Their technical skill, attention to detail, and proactive communication kept everything running smoothly and transparently.We were particularly impressed by their ability to manage complex requirements, build strong analytics, and design a checkout experience that fits our brand perfectly. The project was delivered on schedule, surpassed expectations, and has already made a meaningful impact on our operations.We confidently recommend this team to anyone seeking a reliable, talented, and forward-thinking development partner.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
EffectiveSoft is an AI-enabled product engineering company focused on digital products and enterprise systems. We combine software engineering, UX expertise, and AI capabilities to help companies build products that can adapt to changing requirements, integrations, and growth...
Top Services:
Software Development
Mobile App Development
Big Data Analytics
AI Development
ERP Consulting
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Location
San Diego, California
Number of Employees
250 - 499
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
29 Projects Listed
EffectiveSoft Services
Software Development
Mobile App Development
Big Data Analytics
AI Development
ERP Consulting
IoT
Cloud Consulting
DevOps Consulting
UI/UX Design
Staff Augmentation
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
CITY INDEX
TruBridge
CNote
Plato
Intelon Optics
InCheq
Nissin Foods
Soutron Ltd.
BullionRock
InContinuum
Data sourced from the agency's DesignRush profile
EffectiveSoft Reviews & Testimonials
Alex Silverstein Chief Technology Officer at Unified Digital Group, LLC
5.0★
Software Development Review from Alex Silverstein
Over the past 13 years, I’ve valued the opportunity to work alongside this team. Their expertise played a central role in my company’s success, and I’ve come to rely on them for their consistency, attention to detail, and thoughtful approach.
Philipe Araujo Business Analyst and Quality Engineer at Motive Retail
4.8★
Software Development Review from Philipe Araujo
We have had a highly positive experience utilizing EffectiveSoft's staff augmentation services for our Business Analyst and Quality Engineer needs. The professionals provided were not only highly skilled and knowledgeable but also integrated seamlessly with our existing team, requiring minimal ramp-up time. Their expertise in their respective fields significantly enhanced our project's efficiency and overall quality. We confidently recommend EffectiveSoft for any organization seeking top-tier talent to augment their teams and drive successful project outcomes.
Sasja Ihn Christensen Senior Director, Head of Digital Business Development at MAERSK BROKER
5.0★
Software Development Review from Sasja Ihn Christensen
Maersk Broker is pleased to provide this reference letter for EffectiveSoft, our trusted collaborator for complex web projects. From the initial stages of our projects, the team at EffectiveSoft demonstrated a deep understanding of our requirements and have been apro-active part of any problem-solving process. The team of offshore developers has been well-run through their lead developer, and we have only experienced a professional approach to our projects, as well as a pleasant and trust-based collaboration = between all members in the EffectiveSoft team and our own team. EffectiveSoft has furthermore proved to be highly flexible, adapting to our evolving needs and delivering reliable results under shifting circumstances and shifting priorities. They have furthermore been very quick to find and add the necessary resources to the team when needed, and we have only experienced professional and highly skilled consultants. This has also made on-boarding into projects faster and more efficient.In conclusion, it has been a pleasure working with EffectiveSoft, and I have no doubt that they will continue to be an asset to any collaborators in the future, adding value through their professionalism, dedication and understanding of business needs.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
At Vention, unparalleled customer care isnt just a promise its our mission. We blend personalized experience, unwavering attention to detail, and a genuine passion for your business, ensuring that every aspect of our collaboration is tailored to your success...
Top Services:
Software Development
Staff Augmentation
Mobile App Development
Software Testing
Web Development
Show more
Location
San Francisco, California
Number of Employees
1000 & Up
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
15 Projects Listed
Vention Services
Software Development
Staff Augmentation
Mobile App Development
Software Testing
Web Development
Blockchain
AI Development
Cloud Consulting
CRM Consulting
Cybersecurity
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
IBM
PayPal
Cuvva
Costa Coffee
Memrise
Urban
Tailored Dog Food Delivery
RealVNC
Label on a Cable
ClassPass
Data sourced from the agency's DesignRush profile
Vention Reviews & Testimonials
Lee Tupper CTO at Remotiv (formerly Financial Soundings)
3.8★
Mobile App Development Review from Lee Tupper
Vention has delivered excellent design prototypes and accurate time estimates. The app is still in beta mode, and the partnership with [...] Vention will [continue] until the release of the next version. Vention is a reliable team that offers quality service. (Verified via email)
Jon Wade CTO & Founder at Union54
5.0★
Staff Augmentation Review from Jon Wade
Vention’s efforts allowed the successful development of the product, resulting in new customers. They provided backend developers, business analysts, UI designers, and QA testers to develop our solution. Vention cultivated a seamless partnership through constant updates and a collaborative approach. Overall, their team’s well-rounded expertise was impressive.
AJ Canty CTO and Co-Founder at Primer
5.0★
Web Development Review from AJ Canty
We’ve been working with Vention for quite some time and consider them an extension of our team, rather than an offshore vendor. We needed solid mobile developers to work with our in-house engineers to build our Primer SDKs on both mobile platforms. This was not a trivial thing as it required a lot of cross-functional communication, but the Vention team was up to the challenge. They quickly adopted the best practices we follow at Primer and proved to be effective and proactive.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
VerifiedVerified by the DesignRush team for authenticity and credibility.
Full-Cycle IoT and Software Development company
We deliver cutting-edge, scalable, and fully functional IoT hardware and software products and ecosystems that help clients achieve their specific objectives...
Top Services:
IoT
Software Development
Mobile App Development
AI Development
Big Data Analytics
Show more
Location
California City, California
Number of Employees
500 - 999
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
24 Projects Listed
Yalantis Services
IoT
Software Development
Mobile App Development
AI Development
Big Data Analytics
IT Services
Cybersecurity
Staff Augmentation
Cloud Consulting
UI/UX Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
RAKwireless
Toyota Tsusho
KPMG
Healthfully
Orbis Systems
Lifeworks
Scholz Databank
123 Sourcing
Truhoo
Data sourced from the agency's DesignRush profile
Yalantis Reviews & Testimonials
Sergei Lishchenko Director of Digital Experience and Innovation at Orbis System
5.0★
Fintech Review from Sergei Lishchenko
The exception team the client collaborated with brought in fresh ideas and innovative technologies previously unfamiliar to the client. For example, with Yalantis' guidance, the client's developers explore the Go language. The primary reason the client chose Yalantis is its strong organizational and project management skills. It's not just about the developers; Yalantis provides a comprehensive support framework, ensuring that a project manager is consistently present. (Verified via email)
Jason Jung Senior engineering manager at Zillow
5.0★
Software Development Review from Jason Jung
Yalantis functions as an integral scrum team, supporting the development teams of a real estate firm. It created renovation project management tools that encompass a web app, a mobile app, and a backend system. Thanks to Yalantis, the client expanded development capabilities and achieved key short-term goals. Its quick integration was pivotal in launching various projects. Beyond delivering top-notch work, Yalantis emphasizes a culture that prioritizes the customer's needs. (Verified via email)
Roy D Partner at RAKwireless
5.0★
Outsourcing Review from Roy D
An IoT manufacturer teamed up with Yalantis to craft an application, enabling users to manage their devices more efficiently. Utilizing Node.js and basing the architecture on Circulus, Yalantis delivered commendable outcomes. It is responsive to any development challenges, offering swift resolutions. The client appreciates Yalantis' proactive stance, impressive technical expertise, and practical solution suggestions. (Verified via email)
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Clear your backlog and ship products you're proud of faster with our nearshore software development resources. We provides highly skilled, team-based resources to companies that need tech talent fast...
Top Services:
Mobile App Development
Software Development
Staff Augmentation
Web Development
eCommerce Development
Show more
Location
San Francisco, California
Number of Employees
Under 49
Average Hourly Rate
$70/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
8 Projects Listed
Admios Services
Mobile App Development
Software Development
Staff Augmentation
Web Development
eCommerce Development
Software Testing
IT Compliance Solution
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Converse
Anaplan
Zignal Labs
Contract Pod AI
Collective Health
Terraformation
Conductor
Shop Ware
Symphony
Off the Grid
Data sourced from the agency's DesignRush profile
Admios Reviews & Testimonials
Will McDonald VP Product at Conductor
5.0★
Web Development Review from Will McDonald
I was able to dictate requirements at a high level without having to deal with the details. The Admios team was able to make technical level decisions on their own. They were a first class partner of the team.
Mark Griffin Director of Engineering at Latent AI
4.8★
Software Development Review from Mark Griffin
Due to past experiences, Latent AI is always cautious when hiring external engineering resources for a project. But collaborating with Admios is a breath of fresh air. The agencys account manager is nothing short of professional, attentive, and understanding of client needs. Furthermore, Admios seasoned and self-sufficient engineers fit seamlessly into the Latent AI culture. The team treats and trusts them as one of their own. (Verified via email)
Matt Attaway VP, Software Engineering at Off the Grid
4.7★
Mobile App Development Review from Matt Attaway
Off the Grid has had a longstanding developer partnership with Admios. Recently, the client trusted Admios with building a complex React Native POS system and a guest order-ahead app. Given the complexities of the project, Off the Grid wouldn't have chosen any other agency to work with. The Admios' developers did an excellent job, the management was proactive, and the software quality is exceptional. Admios is highly recommended. (Verified via email)
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Infracore is a best-in-class Cybersecurity and IT Support Services firm. Founded in 2003, Infracore takes a white-glove approach to providing end-to-end IT infrastructure support, cybersecurity, systems management, network design, compliance, desktop support, and strategic decision guidance...
Top Services:
Managed Services
IT Services
Cloud Consulting
Cybersecurity
IT Compliance Solution
Show more
Location
San Diego, California
Number of Employees
50 - 99
Average Hourly Rate
$140/hr
Minimal Budget
$25,000 - $50,000
Infracore Services
Managed Services
IT Services
Cloud Consulting
Cybersecurity
IT Compliance Solution
Staff Augmentation
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Pfizer
SmartDrive
Takeda
Tavistock Group
Verimatrix
Data sourced from the agency's DesignRush profile
Infracore Reviews & Testimonials
Bennett Fisher Service Desk, Cybersecurity at Fresh Echo Interactive
5.0★
Managed Services Review from Bennett Fisher
Fantastic IT support. Very responsive - they act as our internal team! Extremely pleased.
Best Life Review from Google
5.0★
Best Life's Review Sourced from Google
I recently had the pleasure of working with Infracore. Their customer service is exceptional. Their team is responsive, attentive, and genuinely committed to resolving my issues. They took the time to understand my specific needs and provided good, better, best options, which allowed me to feel in control by picking the path that best fit my needs and budget. Their friendly and professional approach made the entire experience seamless and stress-free.When it comes to technical expertise, Infracore truly stands out. Their knowledge of cloud services and cybersecurity is top-notch. They helped us migrate to a secure cloud environment with minimal downtime and ensured our data was protected with the latest security measures. Their proactive approach to identifying and mitigating potential threats has given us peace of mind, knowing our systems are in capable hands. I highly recommend Infracore for anyone seeking reliable and expert IT support services.
Louis Song Review from Google
5.0★
Louis Song's Review Sourced from Google
Paymon, Eric, Ivan and the team are great to work with. They are extremely responsive and knowledgeable and quickly helped us with some cybersecurity issues and an overall audit of our systems. They are my GO TO team for cybersecurity and any IT issues.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Lanex Corporation - Tailor-made solutions for your business needs
Here at Lanex Corporation, we are a full-cycle software development service provider specializing in bespoke digital solutions for startups and companies globally. We build scalable and secure products designed to impact your brand and provide the best digital experience for your users...
Top Services:
Mobile App Development
Software Development
IT Services
Web Development
Staff Augmentation
Show more
Location
San Francisco, California
Number of Employees
100 - 249
Average Hourly Rate
$49/hr
Minimal Budget
$25,000 - $50,000
Lanex Corporation Services
Mobile App Development
Software Development
IT Services
Web Development
Staff Augmentation
AI Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Squareboat is a design-first software development company with offices in India and the US. Through our Crewmate division, we help global businesses hire top remote developers and build fast, scalable digital products...
Top Services:
Software Development
Mobile App Development
Web Development
AI Development
DevOps Consulting
Show more
Location
San Francisco, California
Number of Employees
50 - 99
Average Hourly Rate
$30/hr
Minimal Budget
$25,000 - $50,000
Squareboat Services
Software Development
Mobile App Development
Web Development
AI Development
DevOps Consulting
Web Design
UI/UX Design
Staff Augmentation
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Dr. Reddy's
Hudle
Jubilant Consumer
Chegg
Elevation Capital
CoinDCX
Jamboree
Miko
Sri Sri Tattva
Bioquest
Data sourced from the agency's DesignRush profile
Squareboat Reviews & Testimonials
Aman Setia Review from Google
1.0★
Aman Setia's Review Sourced from Google
The worst experience with the company. First they will call you and will ask you to go for 2 hours exam just like a half yearly or annual exam conducted during school time. After that they will ask you to wait for long. The interviewer will come and will ask only about your past company to attain it's strategies to move ahead and then they will ask you to go as we have a negative results regarding you. They will make you feel comfortable as if you will be selected and then the interviewer himself will be unsecured after seeing your profile, aa you are going to be a threat to them. As of now, they are not having any urgent requirements but calling you to waste your precious time only. Prefer not to go for an interview over here.
Abhishek Bhatia Review from Google
4.0★
Abhishek Bhatia's Review Sourced from Google
Squareboat has been a special part of my journey as a Mobile Engineer for the past 2 years (and counting). What truly makes it a great place to work is the people. You’re surrounded by incredibly smart driven individuals. That’s what makes showing up to work every day genuinely enjoyable.From collaborating on diverse, challenging projects to learning from peers across different teams, the experience has been both rewarding and memorable. The culture is relaxed yet focused, and there’s always room to grow, explore, and contribute meaningfully. Highly recommend it for anyone looking to join a solid tech team!
Tushar Review from Google
5.0★
Tushar's Review Sourced from Google
Experience at Square Boat has been awesome! I've felt super welcome from day one. Even though I'm just an intern, I feel like my input matters and I've had chances to develop skills I didn't anticipate.I'm early in my professional journey, but working at Square Boat has given me a real glimpse of what quality service actually looks like. The dedication to clients is genuinely inspiring.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews