All Software Development Services in Washington
SaM Solutions
5(3 reviews)SaM Solutions is an international provider of IT services and software solutions with over 30 years
RecommendedTop awardedWe focus on IT consulting and custom software engineering, catering to both the European and US markets by leveraging our global resources. Serving a wide range of clients, from startups and SMBs to global enterprises and government agencies, we deliver technological excellence, accelerate time to market, and ensure uncompromised software quality and security. SaM Solutions employs some of the most talented IT professionals in the industry. We continually invest in skills development and knowledge enhancement to ensure our clients receive world-class software solutions and services most cost-effectively. In every client engagement, we are committed to guaranteeing the success of IT processes and software systems.34 works in Software DevelopmentLocated in Norwood, United States (+5)From €3,000 for Software DevelopmentWorked in Software & Computer Services (+23)Speaks English, German(+2)501-1000 membersInstinctools
5(10 reviews)Your AI-powered Engineering Partner
Top awardedMeet *instinctools - a global AI-powered software engineering company with over 25 years of experience. We help both SMBs and Enterprises build robust, scalable software solutions that excel in functionality and design. Our core services include: Agentic AI enablement Custom software development enhanced by deep AI expertise Digital product engineering Business process automation Legacy system modernization Advanced data analytics and visualization Cloud infrastructure and DevSecOps Headquartered in the USA (Maryland) and Europe (Germany), *instinctools offers convenient locations for meeting and collaborating directly with our clients. We have development centers in Poland, LATAM, India, and Kazakhstan that combine global expertise with a strong price-quality balance to ensure exceptional results across time zones. Our work is backed by ISO-certified quality standards, strategic partnerships with leading tech platform, and a long-standing commitment to engineering excellence. Instinctools holds a broad portfolio of regional and industry-specific certifications, including CIR, HIPAA, and other compliance frameworks required for regulated markets. The 2025 Annual Customer Satisfaction Index is 9.1 out of 10.4 works in Software DevelopmentLocated in Potomac, United States (+4)From €10,000 for Software DevelopmentWorked in Construction (+10)Speaks English, German(+1)201-500 membersChudovo OÜ
5(21 reviews)Complex Systems Implementation
Highly recommendedTop awardedChudovo is a custom software development company, focused on complex systems implementation. Customers rely on our expertise, appreciate transparency in time, budget, visibility of work progress, and our assistance in achieving their business objectives with high-quality solutions. Our teams follow best development practices and methodologies and apply their experience in such industries as healthcare, finance, e-commerce, logistics, telecommunications, and others. In our portfolio, we have over 190 successfully implemented web, mobile, desktop, cloud, embedded, and AI projects. With our commitment to innovation, we bring together cutting-edge technologies, visionary strategies, and creative minds to breathe life into your visions and ideas.62 works in Software DevelopmentLocated in New York, United States (+4)From €5,000 for Software DevelopmentWorked in Hospitals & Healthcare (+19)Speaks English, German(+2)51-200 membersLatam Engineering
(0 review)Turning ideas into software
Latam Engineering is a nearshore software development company connecting top Latin American engineering talent with businesses in the US and Canada. With over 8 years of experience delivering custom software solutions, we bring together developers from leading universities across 20+ Latin American countries, all working within your time zone for seamless collaboration. We specialize in end-to-end software development, UI/UX design, and digital transformation advisory, leveraging technologies such as .NET C#, React, Angular, Java, Python, PHP, TypeScript, and cloud platforms like Azure and AWS. What sets us apart: 100% asset ownership, all code, designs, and infrastructure belong to you Nearshore advantage, aligned time zones with US and Canadian clients for real-time communication Vetted talent, developers recruited from prestigious Latin American universities Scalable & secure, solutions built for growth with guaranteed data and system integrity Customer-centric, we adapt to your goals, not the other way around Beyond technology, we are driven by a social mission: creating economic opportunities for Latin American engineers and contributing to sustainable regional growth. When you work with us, you get world-class engineering with real human impact behind it.3 works in Software DevelopmentLocated in Bothell, United StatesFrom €1,000 for Software DevelopmentWorked in Industrial Goods & Services (+2)Speaks English, Spanish1-10 membersPlavno
5(16 reviews)AI-First Software Company: Secure Agents, Voice Assistants, and Scalable Cloud.
Top awardedPlavno is a premier software development house with over 20 years of experience and a highly qualified team of experts in your industry. Fully-fledged teams of specialists cover each stage of product creation , from product management and analysis to design, development, testing, and ongoing support. We have a unique advantage , our pre-formed full teams work exclusively on products in their specific domains, such as Healthcare, E-Learning, FinTech, Travel & Hospitality, Fleet management and more. We can help you with: ✔ Web Development ✔ Mobile App Development ✔ CRM/CMS/SaaS Development ✔ Chat and Chatbot Development ✔ Web3 / DeFi / DAO / Smart contract ✔ WebRTC Stop struggling with bloated budgets and slow time-to-market. At Plavno, our fully-fledged team provides cost-effective and streamlined solutions that minimize technical debt and maximize your product's potential. With end-to-end support and a proven track record in the SAFe Scaled Agile Framework, we're the partner you need to succeed. LET’S CONNECT Let us help you choose the best path forward to deliver the perfect solution: Admin@plavno.io7 works in Software DevelopmentLocated in Alexandria, United States (+2)From €20,000 for Software DevelopmentWorked in Banking & Financials (+19)Speaks English, French(+2)51-200 membersCode District
(0 review)AI Transformation & App Modernization Partner
Top awardedCode District is a USA-based AI transformation and application modernization company helping startups and enterprises modernize legacy systems, automate workflows, and build scalable digital platforms. We specialize in Agentic AI, RAG-based systems, intelligent process automation, AI integrations, and enterprise modernization. Our solutions help businesses reduce manual operations, improve decision-making, and streamline complex processes through intelligent automation and modern architecture. What makes us different is our strategy-first approach, agile delivery, dedicated teams, and focus on building scalable, high-performance systems that support long-term growth.7 works in Software DevelopmentLocated in Washington, United StatesFrom €5,000 for Software DevelopmentWorked in Banking & Financials (+5)Speaks English201-500 membersNTSprint
(0 review)Maximize Ideas!
NTSprint is an IT company founded in the State of Washington, United States, in 2016. It is designed to be a digital transformation partner for small and medium-sized businesses (SMBs) and growing companies. Over the years, NTSprint has maintained a loyal customer base through its winning formula of excellent IT service at a fair cost. We are proud to incorporate best practices and standards to align our results with the rest of the sector and deliver value from the beginning of each partnership.3 works in Software DevelopmentLocated in Seattle, United StatesFrom €1,000 for Software DevelopmentWorked in Entertainment & Events (+1)Speaks English, Spanish51-200 membersUKAD LLC
(0 review)Expert Staff Augmentation and Custom Software Development Services
UKAD is a research and development IT center that delivers full-cycle custom web development services. We specialize in .NET and Mobile technologies. For 18+ years, we set up development teams and support their operations for entrepreneurs and companies from the USA, Canada, and Western and Northern Europe. We have a solid experience in eLearning solutions and edTech, Fintech, Medical technologies, and eCommerce. We are: - Gold Microsoft partner - Optimizely (Episerver) Bronze Solution partner - Umbraco partner - Microsoft Vendor - Top .NET Developer 2019 on Clutch - Top B2B companies 2020 global on Clutch - Top 1000 companies 2020 global on Clutch - ISO 27001 We build software solutions using: - NET + Azure - Optimizely (Episerver) - Umbraco, uCommerce, Vendr - Node.JS, Python - React Native - React, Angular, Vue.JS We enjoy finding cost- and time-effective solutions for the challenges set by the Client’s business goals. UKAD successfully completed more than 300 projects.Looking for work in Software DevelopmentLocated in Kirkland, United StatesFrom €5,000 for Software DevelopmentWorks in multiple industriesSpeaks English, Ukrainian201-500 membersFulminous Software
5(38 reviews)WE LOVE TO BUILD ASK FOR IT AND HAVE IT
Top awardedWe are Fulminous Software, a skilled web and mobile app development company with a proven history of creating popular and profitable apps. We're known for our knack for enhancing existing apps and websites to make them even better, ensuring people keep downloading and enjoying them. Our dedicated team is here to turn your ideas into reality. The company’s biggest strength is its team which I a mix of most ingenious and focused individuals who are adroit in whatever they do. They believe in delivering flawless and reliable solutions to clients that match business needs and drive business growth. We are looking for strategic partnerships from around the globe. If you are interested please contact us today. Client's Feedback About US: https://clutch.co/profile/fulminous-software-private#highlights https://www.bark.com/en/in/company/fulminous-software-private-limited/9AKJO/ Our Key services: * Custom Software development * Mobile App Development (Android App, iPhone App, Cross-Platform App) * Custom Game Development (AR, VR, iOS, Android, NFT, Metaverse, 2D, 3D) * Salesforce Development (Lightning, Implementation, Consulting) * Web Development * Mobile Game Development * Desktop Game Development * Xamarin App Development * Wearable Devices App Development * Enterprise App Development * CRM & ERP Development * Digital Marketing7 works in Software DevelopmentLocated in Clarendon County, United States (+2)From €1,000 for Software DevelopmentWorked in Video games (+9)Speaks English51-200 membersFourth Crossing Systems
(0 review)Custom software. Connected systems. Real results.
Fourth Crossing Systems is a Maple Valley, Washington software company building custom web applications, websites, mobile experiences, workflow automation, AI-enabled tools, and connected business systems. We help organizations replace fragmented processes with practical, maintainable technology tailored to how their teams actually work. Our approach combines clear discovery, focused project scoping, thoughtful interface design, reliable implementation, and transparent communication. From a conversion-focused website to a custom operations platform or system integration, we build around measurable business needs and provide a clean handoff. Serving clients across Western Washington and beyond, Fourth Crossing Systems brings a hands-on, partnership-oriented approach to every engagement.1 work in Software DevelopmentLocated in Maple Valley, United StatesFrom €1,000 for Software DevelopmentWorked in Industrial Goods & Services (+1)Speaks English1-10 membersThe Insights Desk
(0 review)Faster Insights. Smarter Decisions.
The Insights Desk is an expert network and primary research firm helping clients connect with the right industry experts to make smarter business and investment decisions. We partner with business consulting, corporates, investment groups & research firms to help them identify risks and validate strategies through quality insights. "Our Capabilities: We offer tailored primary research solutions, including: 1:1 Expert Consultations (45–60 mins): Direct access to subject-matter experts for market validation and strategic insights. B2B & B2C Surveys: Quantitative studies capturing customer sentiment, trends, and decision drivers. Focus Groups (Virtual & In-Person): In-depth discussions to uncover perspectives and industry dynamics. Long-Term Expert Engagements: Ongoing advisory support from seasoned industry professionals."Looking for work in Software DevelopmentLocated in Spokane County, United StatesFrom €1,000 for Software DevelopmentWorks in multiple industriesSpeaks English51-200 membersFuzionDev LLC
5(10 reviews)Custom AI, Web & Mobile Software Built to Scale
Highly recommendedFuzionDev LLC is a custom software development company helping startups, growing businesses, and established organizations transform ideas into secure, scalable, and high-performing digital products. We specialize in artificial intelligence solutions, web and mobile application development, SaaS platforms, workflow automation, API integrations, cloud infrastructure, and UI/UX design. Our team supports the complete product lifecycle—from discovery, strategy, and architecture to development, testing, deployment, optimization, and ongoing maintenance. We build AI agents, chatbots, RAG systems, marketplaces, booking platforms, CRM and ERP solutions, customer portals, dashboards, e-commerce systems, and other custom business applications. Our core technologies include Next.js, Node.js, TypeScript, Python, React Native, PostgreSQL, AWS, Docker, OpenAI, Claude, and Gemini. Clients choose FuzionDev LLC for clear communication, transparent delivery, practical technical guidance, and dependable long-term support. Whether you are validating an MVP, modernizing an existing platform, automating business processes, or launching an AI-powered product, we turn your goals into reliable software designed to deliver measurable value and support future growth.5 works in Software DevelopmentLocated in Sheridan, United StatesFrom €3,000 for Software DevelopmentWorked in E-commerce (+9)Speaks English11-50 membersFlower Press Interactive
(0 review)Functional is beautiful.
Flower Press Interactive is a team of product designers and engineers who help innovative companies create better websites, apps, and experiences by uncovering product insights. Our award-winning studio is woman-owned and was founded in 2001. We are honored to partner with clients to plan, design, build, and maintain high-quality digital products that make a positive impact on our communities and the world.2 works in Software DevelopmentLocated in Medina, United StatesFrom €10,000 for Software DevelopmentWorked in Sports (+2)Speaks English11-50 membersProbey Services
5(132 reviews)World’s #1 Rated & Reviewed App & Web Development Partner
Highly recommendedTop awardedWorld’s #1 Rated & Reviewed App & Web Development Partner , Probey Services is a renowned IT and digital solutions provider , powering innovation for startups, SMEs, and growing organizations worldwide. Headquartered in London, UK , with a strong presence in India and 11 global branches, we combine global reach with deep technical expertise. Our 320+ specialists have successfully delivered 1900+ projects over the last 10+ years , helping businesses scale with mobile app development, website design & development , enterprise software solutions, AI-powered digital marketing, branding, and social media management. We proudly serve 30+ industries including retail, e-commerce, healthcare, fintech, education, travel, logistics, luxury, and more. Probey Services is rated as the #1 Tech Partner globally on Clutch, GoodFirms, and Trustpilot , we stand out for our system-driven execution, advanced tech stack, and client-first approach. Our Services: We deliver end-to-end digital solutions that don’t just work, they win. Mobile Apps – iOS & Android (React Native, Flutter, Kotlin, Swift, Java). Websites – Fast, stunning, conversion-driven (Shopify, WordPress, Magento, Joomla, Wix, Umbraco). Custom Software – ERP, CRM, SaaS, and cloud platforms (React, Node.js, Angular, .NET, Python, PHP, Ruby, Java). Digital Marketing – AI-powered SEO, PPC, and performance campaigns (SEMrush, Ahrefs, Moz, Google Ads, Analytics). Branding – Logos, identity kits, merchandise, collaterals (Figma, Adobe Suite, CorelDRAW). Social Media – Strategy, UGC/CGC, influencer collabs (Instagram, LinkedIn, YouTube, Pinterest). Awards & Recognition: Proudly recognized worldwide: Top Mobile App Development Company – Clutch (2025) Best Web & Design Agency – DesignRush (2024) Global Leader – GoodFirms (2024) Top 10 IT Companies – G2 (2024) Excellence in Digital Innovation – AppFutura (2024) Clutch Global & Champion Badge (2023 & 2024 )8 works in Software DevelopmentLocated in New York, United States (+4)From €1,000 for Software DevelopmentWorked in E-commerce (+16)Speaks English, Dutch, Belgium(+5)201-500 membersRexsoft Inc
5(10 reviews)Your Growth Focused Web and Mobile Development Partner
Rexsoft is a custom software development company focused on building scalable digital products for startups and established businesses. For over 14 years, we have been helping companies turn ideas into structured, working systems - from MVPs to full-scale platforms. Our core expertise includes SaaS platforms, marketplaces, internal business systems (CRM/ERP), mobile applications, and AI-powered solutions. We specialize in projects where the complexity lies not only in the interface, but in the underlying logic, data consistency, and long-term scalability. We approach development as a business process, not just coding. That means we focus on: clear system architecture from the start structured data models and workflows scalability and maintainability aligning product decisions with business goals Our team includes experienced developers, project managers, and product specialists who work together to ensure that every solution is technically sound and commercially viable. We typically work in a structured process: intro call --> scope alignment --> detailed estimation --> phased development This allows our clients to fully understand the product before committing to development and reduces risk at every stage. Rexsoft is best suited for: startups building MVPs with long-term vision companies replacing or upgrading internal systems businesses looking to build scalable digital platforms We do not offer generic or template solutions - every product is built from scratch based on the specific business needs. Our goal is simple: build systems that actually work in real life, scale with the business, and create long-term value.22 works in Software DevelopmentLocated in New York, United StatesFrom €15,000 for Software DevelopmentWorked in Transportation (+12)Speaks English, Ukrainian51-200 membersZazz
5(1 review)Modern IT. Built Secure. Delivered Right.
Zazz is a trusted software engineering and IT services partner helping enterprises deliver secure, scalable, and high-impact technology initiatives. We specialize in solving complex enterprise challenges - legacy bottlenecks, technical debt, talent shortages, compliance risks, and system fragmentation - so our clients can move faster, scale smarter, and innovate with confidence.1 work in Software DevelopmentLocated in Seattle, United StatesFrom €1,000 for Software DevelopmentWorked in AutomotiveSpeaks English201-500 membersAutomateNexus
(0 review)AI Automation Built to Own, Not Rent
AutomateNexus is a veteran-owned AI automation agency that builds custom AI agents, workflow automations, and self-hosted business solutions for small and mid-sized businesses. We operate on a BYOK (Bring Your Own Keys) model — clients own their infrastructure outright with one-time build fees starting at $2,500. No recurring platform fees. No vendor lock-in. Our services include custom AI agent development (sales, support, recruiting, operations), workflow automation (n8n, Make, Zapier), Salesforce and CRM automation, AI chatbot development, cybersecurity consulting, digital marketing, and self-hosted open-source deployments. Every engagement starts with a free AI automation audit. We identify the highest-ROI opportunities, build turnkey solutions, and deliver with full documentation and training. Most projects are completed in 2-4 weeks. Industries served: manufacturing, financial services, logistics, ecommerce, healthcare, business services, and real estate.Looking for work in Software DevelopmentLocated in Tukwila, United StatesFrom €3,000 for Software DevelopmentWorked in Travel & LeisureSpeaks English1-10 membersM TECHUB LLC
5(10 reviews)AI, Mobile App & Software Development Company
Highly recommendedTop awardedM TECHUB LLC is a US-based AI development, mobile app development, custom software development, and IT staff augmentation company. We help startups, SaaS companies, and enterprises build scalable digital products, automate business processes, and extend their engineering teams. Our AI development services include AI agents, AI chatbots, generative AI applications, RAG systems, voice assistants, workflow automation, and OpenAI API integrations. Our engineers work with Python, FastAPI, LangChain, LlamaIndex, vector databases, and leading large language models. We design and develop mobile applications for iOS and Android using React Native, Flutter, Swift, Kotlin, Firebase, and cloud technologies. Our mobile development experience covers fintech, healthcare, real estate, logistics, eCommerce, education, fitness, social networking, and SaaS platforms. Our custom software development team builds SaaS applications, enterprise software, web platforms, marketplaces, dashboards, APIs, CRM systems, and cloud-based business solutions using React.js, Next.js, Node.js, TypeScript, PostgreSQL, MongoDB, AWS, and Google Cloud. Through our IT staff augmentation services, companies can hire dedicated AI engineers, mobile developers, full-stack developers, DevOps engineers, QA specialists, UI/UX designers, and project managers. We offer flexible full-time, part-time, and dedicated-team engagement models. M TECHUB LLC provides complete product delivery, including strategy, UI/UX design, software architecture, development, testing, deployment, maintenance, and technical support. Our teams serve clients in the United States, United Kingdom, Canada, Europe, the Middle East, and other global markets.3 works in Software DevelopmentLocated in Loudoun County, United States (+2)From €3,000 for Software DevelopmentWorked in Banking & Financials (+7)Speaks English, Arabic(+3)51-200 membersDesignli
5(16 reviews)Build software people actually pay for.
Top awardedDesignli helps non-technical founders turn software into real, revenue-generating businesses. Most agencies hand over code and walk away, leaving you to build the business yourself . We work differently, measuring our success by your traction - real users on a live product and real signs that the business is growing. Every engagement is built around a guaranteed outcome : For founders starting from scratch , our TractionLab program puts a real user on a working MVP within 30 days, or your next month is free. From there, the whole team works to turn that first user into many, and early usage into real revenue. For founders who already have something live , we start with a free one-week Impact Week that pinpoints exactly what's holding your product back. You walk away with a customized plan and a guaranteed Day-30 outcome that clears those roadblocks, so you can get back to chasing traction and your vision instead of fighting your product. The burden is on us to prove we're the right partner. Picking a software development agency is one of the most important decisions you'll make as a founder, and we don't think that risk should fall entirely on you. That's why your first 14 days are fully refundable, and you can cancel any time with 30 days' notice. We work using Hypothesis-Driven Development . Building software is cheaper than ever with AI-empowered engineers; the hard part is knowing what to build and whether it worked. So every change we make carries a business metric and a clear bet about what it should move, and we measure whether it actually did. The result is a real feedback loop on whether your product is getting better each week and driving more usage and revenue. Each engagement is staffed with a small, senior pod that gives your product full-time focus and founder-level care , and is paid on outcomes, not promises.6 works in Software DevelopmentLocated in Greenville, United States (+2)From €10,000 for Software DevelopmentWorked in Banking & Financials (+9)Speaks English51-200 membersDebut Infotech
5(9 reviews)AI-Augmented Product Engineering Company
Highly recommendedDebut Infotech is an AI-augmented blockchain and software development company helping organizations across financial services, healthcare, supply chain, and digital platforms build systems that perform reliably in complex, regulated environments. Founded in 2011 and blockchain-native since 2015, the company brings engineering discipline and technology depth to enterprises moving from fragmented pilots to production-grade systems. With delivery centers across the USA, UK, Canada, and India, Debut Infotech combines regional market understanding with globally distributed engineering capability — enabling clients to move with speed, consistency, and governance. Service areas: Artificial intelligence and generative AI — Enterprise LLM integration, AI agent development, retrieval-augmented generation (RAG) pipelines, predictive analytics, computer vision, and intelligent process automation embedded at the system architecture level. Blockchain and Web3 development — Smart contract engineering, DeFi protocol development, real world asset (RWA) tokenization, cryptocurrency exchange infrastructure, and enterprise blockchain on Hyperledger Fabric and Corda. Mobile application development — Native iOS, Android, and cross-platform applications (React Native, Flutter) architected for AI integration, enterprise-grade security, and sustained performance under production load. Web and software development — Full-stack web platforms, SaaS products, and enterprise software systems engineered API-first, designed for long-term maintainability and organizational scale Proven Delivery: $62M+ raised across client platforms including Ifinca, IntegraLedger, Everledger, and TĒM 90% customer success score across enterprise engagements 15 years of enterprise software delivery Fortune 500 clients and high-growth startups across 25+ industry verticals 50–249 engineers spanning AI, blockchain, and software disciplines4 works in Software DevelopmentLocated in Cook County, United States (+2)From €10,000 for Software DevelopmentWorked in Others (+11)Speaks English51-200 members