Explore leading backend developers in the United States who create strong server systems, manage databases, and ensure apps run smoothly and securely. Our curated list features vetted experts who focus on performance, scalability, and long-term reliability across modern tech stacks.
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.

Azumo
VerifiedVerified by the DesignRush team for authenticity and credibility.Build Intelligent Apps for Web, Mobile, Data, AI and Cloud
Azumo is a SOC 2-certified web and software development company founded in 2016, delivering AI-augmented dedicated teams across React, Node.js, Python, and cloud stacks for clients including Meta, Twitter, Discovery Channel, and Omnicom. Well-suited for startups and enterprises needing nearshore development...
Top Services:
- AI Development
- Software Development
- Staff Augmentation
- Mobile App Development
- Big Data Analytics
- Show more
- Location
- San Francisco, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $55/hr
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 9 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAzumo Services
Data sourced from the agency's DesignRush profileDiscovery Channel Meta Zynga Jostens Assembled Brands NGL NCSoft Twitter Horoscope.com Bento
Azumo Reviews & Testimonials

Software Development Review from Michael S.
We selected Azumo to develop our software. We transitioned from another development company, so Azumo was initially responsible for migrating our existing code and environments. We are currently still working with Azumo as our nearshore software development team on adding new items to our software.

UI/UX Design Review from Anonymous
Azumo helped us migrate our existing UIs into a new framework, creating reusable components and the infrastructure needed for future development. The developer they assigned became a seamless part of our team, always punctual, responsive, and a great fit overall.

Software Development Review from Anonymous
Thanks to Azumo’s work, our product is now more scalable, optimized, and ready for a growing user base. Their team has managed the engagement effectively, keeping us updated and addressing any challenges along the way. We’ve appreciated their constant availability and proactive communication.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Leanware
VerifiedVerified by the DesignRush team for authenticity and credibility.Boutique Software Development Company
Boutique Software Development Company serving operators and startups that need strategy and execution under one roof...
Top Services:
- Software Development
- Mobile App Development
- AI Development
- Software Testing
- Staff Augmentation
- Show more
- Location
- Miami, Florida
- Number of Employees
- Under 49
- Average Hourly Rate
- $40/hr
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 7 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsLeanware Services
Data sourced from the agency's DesignRush profile2Moon Capital BackupTyping Blueback Global
Leanware Reviews & Testimonials

AI Development Review from Julia Antoci
Leanware built the mobile MVP of our AI fitness assistant for iOS and Android. It started with discovery workshops that sharpened the product vision and shaped an MVP roadmap prioritizing launch features while leaving room for expansions like avatars and real-time feedback. They developed a conversational AI engine with custom prompt and context engineering tailored to fitness conversations, one that keeps continuity across sessions, remembers user progress and preferences, and keeps health guidance within safety standards. On top of that they implemented photo-based food recognition, smart search that understands fitness intent, personalized recommendations, progress tracking with AI-generated insights and coaching suggestions, and gamified response formats that make AI answers easy to read, plus the scalable backend behind it all. Their consultation saved us an estimated 20 to 30 percent in costs by avoiding unnecessary complexity, and we launched a functional MVP across the app stores in under eight weeks, faster than planned. Project management was exceptional: clear timelines, on-schedule delivery, and proactive communication via Slack, with expert recommendations guiding decisions rather than every choice being pushed back to us. Their technical skill and creativity made the whole thing feel less like hiring a vendor and more like building with a co-founder.

Software Development Review from Anonymous
Leanware delivered two significant projects for our e-commerce platform along with a steady stream of smaller fixes and enhancements. They built a new employee management page in our back office so our customers can create accounts, set permissions, and link employees to entities on their own, and when our mobile app's chat functionality needed replicating in the back office, they built a custom chat and messaging React library from scratch, integrated seamlessly with our design system and existing bespoke solution. Along the way they worked comfortably across Next.js, React, React Native, Apollo, GraphQL, and Hasura, and adapted to our implicit conventions. We ran week-long SCRUM sprints with check-ins three times a week, and they consistently hit the sprint goals on time; even when we needed hard pivots mid-sprint, they adapted without losing pace. As the engagement progressed they increasingly took the lead, asking well-informed questions and offering suggestions on code, product, and design that genuinely enriched the outcomes. What impressed us most was how swiftly they onboarded: given incomplete product descriptions, they asked the right questions to fill the gaps and picked up our undocumented code patterns without getting stuck on minor details. It felt like one cohesive team working toward shared objectives, free of the friction that usually comes with a third party

Mobile App Development Review from Anonymous
Leanware has partnered with us since Q4 2023 on two cloud-based mobile apps for iOS and Android, one built in Flutter and one in React Native, handling development on both and the UI/UX design on one. For one project they staffed a team of five mid-level developers, a senior developer, an architect, and a UX designer available as needed. They also took over an app that was unstable and nowhere near production-ready and turned it into a stable, solid product I'm genuinely proud to show. Their processes leave nothing to chance and the code that comes out of them is excellent; they've been flexible and thorough throughout. They meet deadlines, keep their promises, and are careful about what they commit to. The whole team has been great, and Alvaro, their Technical Product Manager, deserves a special mention for being remarkable. I hired them because they were upfront about what they could and couldn't do, and that honesty, together with the tremendous quality of their work, is what separates them from other providers. Both are getting harder to find these days.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsSolving complex problems with design and technology since 2005.
As a website development agency, Infinum makes it easy to turn your boldest ideas into digital products that streamline processes and grow your customer base. Superior solutions are born from our profound experience in design and technology, helping you reimagine and elevate your business...
Top Services:
- Web Development
- Web Design
- Mobile App Development
- UI/UX Design
- Software Development
- Show more
- Location
- Miami, Florida
- Number of Employees
- 250 - 499
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 24 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsInfinum Services
Data sourced from the agency's DesignRush profilePorsche Nike CITI Royal Caribbean Philips Bayer T-Mobile P&G Universal Virgin Mobile
Infinum Reviews & Testimonials

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.

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.
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 ReviewsAward Winning Custom Development Experts | ERP Integration | Shopify/BigCommerce
QOLOS (pronounced "koh-lohs") is a U.S.-based software development company, specializing in building custom, high-performance digital solutions for brands that demand innovation. From complex ERP integrations to e-commerce solutions - you are in good hands with QOLOS...
Top Services:
- Web Development
- eCommerce Development
- WordPress Website Design
- UI/UX Design
- Software Development
- Show more
- Location
- Green Bay, Wisconsin
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $150/hr
- Minimal Budget
- $50,000 & Up
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsQOLOS Services
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QOLOS Reviews & Testimonials

WooCommerce Review from Amanda Viviano
We hired Qolos to build our local florist shop's website on WordPress and WooCommerce, and we couldn't be happier with the results. From the start, they took the time to understand our business and created a site that's not only beautiful but easy for our customers to browse and shop.The WooCommerce setup was seamless, our online ordering works exactly the way we needed it to. But what really sets Qolos apart is their ongoing monthly maintenance. We never have to worry about updates, security, or technical issues because they stay on top of everything. Any time we've had a question or a small change request, they've been responsive and professional.As a small local business, it means a lot to work with a team that genuinely cares about keeping our site running smoothly. Qolos has been a true partner, not just a vendor. Highly recommend them to any local business looking for reliable web design and maintenance!

Web Development Review from Sanjay Singh
I kept getting negative reviews about my app for technical glitches, heating issues, functionality, loading time, crashing, and more bugs. So, I reached out to QOLOS after going through 2-3 renowned review platforms. I explained my app issue to the team, and they did tremendous work with their mobile testing solutions. Also, I wanted to build a website for my app. They created a feature-rich and seamless website.

Shopify Review from Sarah Nesheim
Working with QOLOS was the best decision I have made in regards to scaling my business. They are professional, so creative, they communicate every step of the way and their pricing is fair for the highest quality work. The designer of our logo and website did it well and I am so impressed and proud of the final product! the designer listened and knew exactly what I wanted which made the process so simple. Seriously could not recommend QOLOS more!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsTop Healthcare Product, Technology, & Venture Design Firm
Sidebench is the top healthcare technology design and software engineering firm in the US. We combine strategy, design, technical architecture at every point of our process. We are known for delivering extraordinary business results...
Top Services:
- Mobile App Development
- Software Development
- AI Development
- Wearables
- UI/UX Design
- Show more
- Location
- Los Angeles, California
- Number of Employees
- Under 49
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 11 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsSidebench Services
Data sourced from the agency's DesignRush profileAmerican Heart Association Children's Hospital Los Angeles (CHLA) Hoag Hospital Cortica A16Z (Andreessen Horowitz) Lightspeed Venture Partners Microsoft Rud Bull HP Sony
Sidebench Reviews & Testimonials

Translation Services Review from Abhit
They provide consulting services for a healthcare service provider. Sidebench contributed their expertise to a comprehensive mobile application to make sure it would pass Apple Store requirements. Thanks to Sidebench`s input, the application launched on the Apple Store after the first submission. Sidebench`s response times were quick, and they were willing to accommodate a unique working arrangement. The relationship that we had was probably unique; most companies would push to do the development themselves. We only needed Sidebench`s know-how, and they were willing to accommodate us.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsAn independent creative agency in Washington DC
This January is an indie creative agency building brands that have to earn attention instead of buying it. Our design, creative, production and media buying teams sit side by side. Clients include Lufthansa Group, GRVTY, the International Spy Museum and ZURU...
Top Services:
- Advertising
- Creative Services
- Branding
- Web Design
- Social Media Marketing
- Show more
- Location
- Washington DC, Washington DC
- Number of Employees
- Under 49
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 2 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsThis January Services
Data sourced from the agency's DesignRush profileLufthansa Group The Spy Museum Profound AI Relay Financial Swiss Airlines
This January Reviews & Testimonials
Patrick White's Review Sourced from Google
They just handled our branding for a gonzo popcorn brand and they were amazing at meeting us at our weird nexus of polished aesthetic, gross out humor and weirdo messaging. They are as cool as they are funny.
Kevin Schwartz's Review Sourced from Google
This January starts where most other agencies finish! Their combination of highly innovative thinking and individual attention to each client makes them the go to agency in DC and beyond! The best!
Rob Shore's Review Sourced from Google
Probably the top ad agency in DC and rival the bigger established brands out of NY.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsGlobally Recognized Digital and Engineering Solutions Partner.
Named Best AI Company and Software Development Company by The Netty Awards, Opinov8 is a global technology firm with development hubs across the United States, Europe, and Egypt...
Top Services:
- Software Development
- Mobile App Development
- UI/UX Design
- Web Development
- Big Data Analytics
- Show more
- Location
- Chicago, Illinois
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $42/hr
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 3 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsOpinov8 Services
Data sourced from the agency's DesignRush profileRenault WELD Health Hastee Instamotion HR DataHub Beacon United Language Group German Society for International Cooperation
Production AI you're not allowed to get wrong.
iSimplifyMe is an AI Infrastructure & Orchestration firm. We architect and operate production AI on private AWS...
Top Services:
- AI Development
- Software Development
- Cloud Consulting
- CRM Consulting
- IT Services
- Show more
- Location
- Chicago, Illinois
- Number of Employees
- Under 49
- Average Hourly Rate
- $299/hr
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 3 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsiSimplifyMe Services
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iSimplifyMe Reviews & Testimonials
Dr. Millicent Rovelo's Review Sourced from Google
I could not be happier with this company! I have had two websites designed by them and the whole experience was amazing. Their technology and skills are top of the line and their customer service is excellent. Not to mention a good eye for aesthetics and skilled at SEO building. Highly recommend!!
Nikki Lazzara's Review Sourced from Google
Joe and James and AJ have done wonders for our business. Excellent design as well as support while we navigate our new website. Professional. I highly recommend them if you are looking to improve your digital marketing.
Anita Patel's Review Sourced from Google
I’ve worked with ISimplifyMe on a number of different projects over the years, and I think they are second to none. I am very particular about whom I choose to work with, and had interviewed a lot of companies before deciding to go with ISimplifyMe. I had contemplated going with a local company (Los Angeles), thinking it may be easier to communicate, but with ISimplifyMe the time difference was a nonissue. They replied faster and more thoroughly than local companies, and have been able to deliver time and time again. They have consistently produced high quality work, while being honest, reliable, and trustworthy.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsFrom Idea To Industry Leader, Faster
Launch 3X faster and cheaper with our data-driven development approach. Valueans, your friend in the world of app development! We're all about custom application development and helping your business shine with the latest tech. Our team is great at making websites and apps that work well on phones, and we...
Top Services:
- Web Development
- Software Development
- Mobile App Development
- AI Development
- IT Services
- Show more
- Location
- Hillsborough Township, New Jersey
- Number of Employees
- Under 49
- Average Hourly Rate
- $100/hr
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 1 Project Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsValueans Services
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Valueans Reviews & Testimonials
Ayyan Ahmad's Review Sourced from Google
I'd say that if you're finding anyone that is super fast and you want the cheapest and the best app/website contact valueans
Hamza Zahoor's Review Sourced from Google
I recently had the pleasure of working with Valueans, and I can’t recommend them enough! Their team is incredibly professional, detail-oriented, and always goes above and beyond to deliver top-notch software solutions.From the initial consultation to project delivery, they kept me informed at every stage and ensured all my requirements were met. Their expertise in software development and IT services is truly impressive, and their dedication to client satisfaction sets them apart.If you’re looking for a reliable, innovative, and results-driven software company, Valueans is the one to trust. Exceptional service and outstanding results!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsRailsware - A software development agency
We're a software development agency that builds products that scale. Our engineering-first culture and product-minded approach have powered success stories like Calendlythe scheduling platform that revolutionized meetings for millions...
Top Services:
- Software Development
- AI Development
- Mobile App Development
- IT Services
- DevOps Consulting
- Show more
- Location
- West Hollywood, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $149/hr
- Minimal Budget
- $50,000 & Up
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsRailsware Services
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Railsware Reviews & Testimonials
Yurii's Review Sourced from Google
Don't waste your time on them, they are not really hiring, just pretending like they do. Not sure why, maybe to collect some data on potential candidates.
Przemyslaw Eliasz's Review Sourced from Google
Unprofessional approach to the recruitment process in finance. Watch out just not to waste your time.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsFUEL DIGITAL VELOCITY
We help you recruit, hire, manage and scale world-class offshore distributed Software Teams. We also design and develop full custom software projects...
Top Services:
- Staff Augmentation
- IT Services
- Software Development
- Mobile App Development
- Show more
- Location
- Lakewood, Colorado
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $49/hr
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 1 Project Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsChromedia Services
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5 Frequently Asked Questions About US Backend Development Companies
Which programming languages are most used by backend developers in the United States?
Backend development in the United States relies on several mature programming languages that support scalable APIs, cloud infrastructure, enterprise systems, and data-driven applications.Â
| Language | Properties | Commonly used frameworks/Used for |
| Python | One of the most widely used languages for backend services, data platforms, and AI-powered applications. |
|
| Java | One of the most widely used languages for enterprise backend systems, particularly in industries like finance, healthcare, and large SaaS platforms. |
|
| JavaScript/Node.js | JavaScript is traditionally associated with frontend development. |
|
| C#/.NET | Key backend language in the U.S., especially for companies building enterprise applications on Microsoft technologies. |
|
| PHP | Widely used by PHP developers building web platforms, content management systems, and eCommerce backends. |
|
The GitHub Octoverse 2024 report found that Python became the most used programming language on GitHub, overtaking JavaScript after more than a decade at the top.
According to recent hiring data, about 39.5% of recruiters are actively seeking a Java developer for their teams, making it one of the most in-demand skills in software development hiring.
The Stack Overflow Developer Survey 2025, which collected responses from tens of thousands of developers worldwide, reported that about 66% of developers use JavaScript, making it the most commonly used programming language overall.Â
What do US backend development companies do?
They design, build, and maintain the server-side systems that power modern digital products. The systems handle the logic, data processing, and infrastructure behind applications such as SaaS platforms, eCommerce websites, mobile apps, and enterprise software.
- Build and maintain server-side application logic: Writing the server-side code that powers applications, processes requests from users, executes business logic, and returns results to the interface.Â
- Design databases and manage application data: Creating and maintaining databases that store user accounts, product information, transactions, and analytics data. A backend engineer designs schemas, optimizes queries, and ensures fast data retrieval from systems such as SQL or NoSQL databases.Â
- Develop Application Programming Interfaces (APIs) and integrations: Building APIs that allow different systems to communicate. APIs connect web applications with mobile apps, payment gateways, cloud services, and third-party platforms.
- Build scalable cloud infrastructure: Building infrastructure that can support millions of users and large volumes of data, including cloud architecture, containerized services, microservices platforms, and automated deployment pipelines.Â
- Support security, performance, and reliability: Protecting data and ensuring applications run smoothly through authentication and access control, data encryption and security compliance, monitoring and error handling, and performance optimization.
- Build and maintain complex software platforms: Building the core infrastructure behind SaaS platforms, fintech and payment systems, healthcare applications, enterprise business software, and eCommerce platforms.Â
When should a company hire a senior backend engineer or a staff backend engineer?
Businesses usually hire a senior backend engineer or staff backend engineer when their software systems become complex enough that architecture, scalability, and technical leadership matter more than simply writing code.Â
At that stage, experienced engineers help companies avoid costly technical mistakes and build systems that can scale reliably.
Businesses typically start needing staff backend engineers once their team expands to 50 or more engineers or when existing architecture cannot support growth in users or product features.
Hire a backend engineer when your:
- The platform needs to scale to thousands or millions of users
- The engineering team begins to grow
- System architecture becomes a business bottleneck
- Backend systems require advanced performance optimization
Modern backend systems increasingly rely on microservices, cloud infrastructure, and container platforms. In fact, about 75% of backend roles now require proficiency with cloud platforms such as AWS, Azure, or Google Cloud, reflecting the critical role scalable infrastructure plays.
How much does it cost to hire backend developers in the United States?
The cost of working with a backend development company in the USA varies widely depending on the project scope, the engineer's seniority, and the complexity of the software system being built.
Market benchmarks suggest the following rates:
- Mid-level back-end developers: about $120-$160 per hour
- Senior full-stack or backend engineers: around $130-$190 per hour
- High-end enterprise engineering services: $300-$800 per hour for specialized projects and large consulting firms.
The mentioned rates are significantly higher than internal salaries because United States backend development companies also include project management, QA testing, DevOps, and infrastructure support within their pricing models.
Project pricing depends heavily on system complexity. Typical backend development budgets in the US market include:
- Small backend service or MVP: $20,00-$80,000
- SaaS platform backend: $80,000-$250,000
- Enterprise or large-scale platform: $250,000-$1,000,000+
How long does a backend development project usually take?
The timeline for a backend development project depends on the platform's complexity, the number of required integrations, and the size of the engineering team.Â
Some backend systems require up to 800 hours of backend development work for core infrastructure alone, depending on the number of APIs, integrations, and database features implemented.
| Project | Timeline | Backend scope |
| Startup MVP backend platform | 2-6 months | Core APIs, authentication, database setup, basic integrations, and initial cloud deployment |
| Mid-scale SaaS or web platform | 6-9 months | Scalable APIs, advanced business logic, database optimization, multiple integrations, and monitoring systems |
| Enterprise backend systems | 9-12 months | Distributed services, high-volume data processing, compliance features, complex integrations, and infrastructure automation |
| Large platforms with complex infrastructure | 12-18+ months | Microservices architecture, real-time processing pipelines, global cloud infrastructure, and large-scale databases |











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