Top ExpressJS Development Companies in Illinois
SelectedFirms reviews agencies and verifies client feedback to support informed decisions. [How SelectedFirms Ensures Trust]
Not sure which
agency is right for you?
Tell us about your project, and get matched with agencies that fit your requirements.
List of the Best ExpressJS Development Agencies and ExpressJS Developers in Illinois
Certain agencies may be featured through sponsored placements. Rankings and SF Scores remain unbiased and are based solely on our evaluation methodology.
8 Companies
Filter by
-
USA
-
Illinois
5.0 (18 Reviews)
57
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
57
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Your partner in mobile and web engineering
Simpalm is a leading digital product development company in the USA, specializing in UI/UX design, mobile app development, web development, AI solutions, and SaaS platforms. With offices in Maryland, Chicago and New York, we’ve been building transformative digital solutions for startups, established companies, and nonprofits. Our digital solutions have solved challenges for healthcare, financial services, construction, education, IoT, charities, associations and SaaS industry. Our team of experienced project managers, designers, developers, and testers combines creativity with cutting-edge technology to turn ideas into high-performing apps, websites, and AI-driven systems. We focus on delivering products that enhance efficiency, scalability, and user experience — helping organizations grow faster in today’s digital-first world. With over 400+ successful deployments, Simpalm has become a trusted partner for businesses looking to design, develop, and scale their digital products. Beyond development, we offer continuous support and maintenance to ensure your solution remains secure and future-ready. Our Main Services: Discovery and Design: Define requirements, create wireframes, and design visually engaging UI/UX for your app or website. Custom App Development: Build AI-powered mobile apps using React Native, Swift, Kotlin, and Flutter. Website Design and Development: Craft CMS-based websites in WordPress, Drupal, or Hubspot CMS to represent your brand or organization effectively. Web and SaaS Applications: Develop scalable SaaS or web portals using React, Node.js, .NET, and Python. AI Strategy and Development: Create tailored AI strategies, chatbots, and automation workflows that empower your business. Support and Maintenance: End-to-end technical support to keep your products performing seamlessly.
See all 3+ Case Studies
$100-$149/hr
$25,000+
10 - 49
Rockville, USA
Verified Client Review
Collaborative, Flexible, and Focused on Building the Right Product
Reviewed by: Guiulianna Cespedes, Founder of Quynza View all 18 Reviews
0.0 (0 Reviews)
40
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
40
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Your AI-Native Technology Partner
CodingCops is an AI-native technology and engineering partner helping businesses build, modernize, and scale through AI development, vetted engineering talent, Salesforce, product & software development, cloud & DevOps, and data & analytics. As an AI-first technology company, we design, build, integrate, and scale production-ready AI solutions. Our expertise spans AI agents and multi-agent systems, generative AI, custom LLM applications, RAG, machine learning, intelligent automation, AI integration, enterprise knowledge assistants, and predictive analytics. Our Salesforce capabilities include consulting, implementation, development, integration, Agentforce, automation, optimization, and managed services. Across product and software engineering, we build custom software, SaaS platforms, digital products, enterprise applications, web and mobile applications, APIs, and modernize legacy systems. We help organizations scale with dedicated engineering teams and specialized AI, Salesforce, software, data, and cloud engineers. Our cloud, DevOps, and data expertise covers cloud architecture and migration, infrastructure modernization, CI/CD, data engineering, analytics, and business intelligence. CodingCops serves healthcare, life sciences, financial services, FinTech, insurance, manufacturing, retail, e-commerce, SaaS, technology, logistics, telecommunications, energy, education, HR technology, hospitality, and professional services. From strategy and architecture to development, integration, deployment, and ongoing support, we combine AI-native thinking with full-cycle engineering expertise to build secure, scalable, production-ready technology.
See all 4+ Case Studies
Undisclosed/hr
$5,000+
300 - 400
Chicago, USA
5.0 (5 Reviews)
33
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
33
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Do What You Do Best - Better
Atomic Object is a U.S.-based custom software development company focused on building high-impact digital products that drive measurable business results. Our expert team designs and develops new software, enhances existing applications, modernizes legacy systems, and integrates AI-driven capabilities. As an employee-owned firm with offices in Chicago, Ann Arbor, Grand Rapids, and Raleigh-Durham, we deliver collaborative, high-quality solutions tailored to each client’s strategic goals.
View Atomic Object Profile
$150-$199/hr
$25,000+
50 - 249
Grand Rapids, USA
Verified Client Review
Custom Software Development for Consulting Firm
Reviewed by: Richard Berens, Managing Director at Accenture View all 5 Reviews
4.7 (10 Reviews)
4.7 (10 Reviews)
32
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
32
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
OUR QUALITY, YOUR SUCCESS!
We are a collection of realists, strategists, developers, perfectionists, and idealists. We create amazing apps and software. Our primary objective as a leading enterprise is providing clients worldwide with digital transformation services and solutions. With a strong track record of more than a decade in the IT industry, 9series' experience is valued, with countless man-hours devoted to delivering cutting-edge services and solutions. We have built more than 65 mobile applications, successfully served more than 500 clients, and are dispersed throughout countries such as Sweden, Norway, Ireland, Finland, the United Kingdom, Germany, France, Italy, South Africa, Ghana, Kenya, the United States, Canada, Australia, Singapore, Malaysia, Turkey, Egypt, Iran, and the United Arab Emirates, among others.
View 9series Profile
$25-$49/hr
$1,000+
50 - 249
Seattle, USA
Verified Client Review
Web App Dev for Property Rental SaaS Platform
Reviewed by: Angel Ramos, CEO at ACuadrado Corp. View all 10 Reviews
5.0 (10 Reviews)
31
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
31
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
AI Production That Users Really Feel
AI Software Development Company Delivering Revenue-Driving, Production-Ready Features We’re not an AI lab—we’re an AI delivery partner. Our team builds and ships production-ready AI features directly into your application, including copilots, document automation, knowledge assistants, recommendation engines, and real-time voice agents. Every deployment includes enterprise-grade security, governance, and ROI measurement from day one. How We Create Business Impact We turn real operational challenges into measurable AI outcomes that: • Reduce handling time for operations, claims, and back-office teams • Increase conversion and retention with intelligent workflow guidance • Speed up decision-making using context-aware, cited knowledge • Elevate customer experience through natural voice and chat • Maintain predictable costs with built-in evaluation frameworks and guardrails Core AI Capabilities • In-App Copilots – Assist users through complex workflows • Document AI (IDP) – Extract, classify, and validate invoices, KYC, contracts • Knowledge Assistants (RAG) – Deliver instant, cited answers from your content • Recommendations – Provide transparent next-best-action guidance • Voice & Real-Time Agents – Low-latency AI for contact centers AI Feature Sprint: Ship in 4 Weeks Our focused sprint delivers a single high-impact feature—support copilot, document intake, knowledge assistant, or voice agent—with security, compliance, and KPI tracking built in. Industries: Financial Services • Healthcare • Insurance • SaaS • Enterprise Operations Tech: AI Development • NLP • Computer Vision • Voice AI • RAG Systems
View HyperSense Software Inc Profile
$50-$99/hr
$25,000+
50 - 249
Schaumburg, USA
Verified Client Review
Medical Platform Dev & for Telemedicine Company
Reviewed by: Anca Neacsu, CEO at Helixomic View all 10 Reviews
0.0 (0 Reviews)
29
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
29
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Where Creativity Meets Strategy
Since 2015, NexGen Designers has grown from a small studio into a trusted graphic design, logo design and branding agency in Des Plaines, Illinois.We specialize in website design and digital marketing services that help businesses stand out and grow. Our approach is simple: smart strategy, clean design, and results that support your business goals.From brand identities to fully responsive websites, we create visuals that connect with your audience and elevate your digital presence. At NexGen Designers, we focus on delivering quality, creativity, and long-lasting value for both local clients in Des Plaines and brands around the world.
View Nexgen Designers Profile
$100-$149/hr
$3,000 - $10,000
50 - 100
Des Plaines, USA
0.0 (0 Reviews)
27
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
27
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Transforming Ideas into Digital Realities
StudioKrew is a leading mobile app and Game development company based in India, USA, UK, UAE, & Canada, since 2013. Creating customer success strategies and implementing them into solutions is what we do at StudioKrew. With 12 years of experience in providing smart IT solutions, our social nerds have mastered the art of pushing boundaries to create customised mobility solutions and achieve success stories. Simultaneously with developing exciting products, we work on maintaining strong client relationships, which are crucial for carrying forward business legacies. The StudioKrew team has been a top hand-picked tech company globally across different time zones. We deliver quick projects while maintaining high-level designs and development aesthetics, catering to the needs of the demanding market. Do you have an idea? Feel free to consult with our managers to brainstorm possibilities and strategies to create a viable product before you sign in. Contact Us Now. Our service offerings include: Product strategy and definition Mobile Game Development Casual Game Development Game Designing Studio High Graphics 3D Designing and Animation UX/UI design Native Mobile App Development React Mobile App Development AR/VR App Development Web development Backend services AI, Machine learning and data science eCommerce Web and App Development Revit Development and Consultancy Some of the sectors we specialize in: Product strategy and definition UX/UI design Automobile Advertisements Entertainment Education Healthcare Banking Training and Assessments
View StudioKrew Profile
$25-$49/hr
$2,000 - $6,000
80 - 120
Chicago, USA
Need help choosing a company?
Share your project requirements and we’ll connect you with the best-matched expressjs development companies – for free.
Get Matched Now
-
100% Free
No obligation and no hidden fees -
100% Free
No obligation and no hidden fees -
100% Free
No obligation and no hidden fees
0.0 (0 Reviews)
27
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
27
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Design Develop Digitze
10turtle is a global creative-tech agency based in Surat, India with presence in the US, Canada and Dubai offering end-to-end digital solutions across branding, UI/UX design, web development (WordPress, Shopify, Wix, Webflow & SquareSpace), AI automation, digital marketing, and custom software. We work with DTC brands, startups, and SMBs who need a single partner to handle design, technology, and strategy without the overhead of managing multiple vendors. Our subscription-based model delivers unlimited revisions, fast turnarounds, and dedicated team support at every stage. Trusted by brands across industries, we blend data-driven thinking with creative execution to turn digital presence into measurable business growth.
View 10turtle Profile
$100-$149/hr
$5,000 - $10,000
50 - 170
Illinois City, USA
Need help choosing a company?
Share your project requirements and we’ll connect you with the best-matched expressjs development companies – for free.
Get Matched Now
-
100% Free
No obligation and no hidden fees -
100% Free
No obligation and no hidden fees -
100% Free
No obligation and no hidden fees
Why Companies Trust SelectedFirms?
SelectedFirms bridges the gap between businesses and digital service providers as a trusted B2B research and listing platform. With the trust of 14,000+ companies and a growing community of 1M+ users, we empower businesses with reliable insights to make confident decisions.
Human-verified companies
We manually review companies to ensure they meet our quality standards before they appear on the platform.
Research-driven rankings
We rank companies using a clear ranking methodology based on real client feedback, expertise, market credibility, and how well teams execute — not hype.
Always up-to-date insights
We regularly refresh listings with new reviews, case study updates, and market changes to keep decisions relevant.
Verified credibility signals
From verified badges to editorial reviews, we highlight companies that show real commitment to quality and transparency.
