All Mobile App Developers in Seattle
Plavno
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: sales@plavno.io22 works in Mobile AppLocated in Alexandria, United States (+2)From €10,000 for Mobile AppWorked in Banking & Financials (+19)Speaks English, French(+2)51-200 membersSaM 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.13 works in Mobile AppLocated in Norwood, United States (+5)From €5,000 for Mobile AppWorked in Industrial Goods & Services (+23)Speaks English, German(+2)501-1000 membersMind Studios
5(3 reviews)Long-Term Technology Partner for Growth-Stage and Mid-Market Companies
RecommendedFounded in 2013, Mind Studios is a custom software development company working with growth-stage and mid-market businesses across the US, UK, Europe, and MENA. The portfolio spans logistics platforms, real estate marketplaces, healthcare systems, and fitness ecosystems - operationally critical products built for companies where technology is central to how the business runs. The team engages at the architecture stage, before the critical decisions get locked in. Business analysis, technical scoping, and honest pushback on briefs that won't hold up at scale are standard. The goal from day one is a system that doesn't need to be rebuilt in two years. What distinguishes Mind Studios is what happens after launch. Scaling infrastructure, iterating on features, extending systems as the business grows - this is where most of the value gets built, and where long-term client relationships form. The average engagement runs over two and a half years. Many go considerably longer. 100+ specialists. 13 years in business. 70% client retention rate.6 works in Mobile AppLocated in Mantua, United States (+3)From €20,000 for Mobile AppWorked in Logistics & Supply Chain (+5)Speaks English, Ukrainian51-200 membersDoodle Web
5(1 review)High-end websites that turn clicks into leads
DoodleWeb is a Seattle-based web design, development, and products studio serving clients across the US and Canada. We design, build, and continuously improve high-performance websites and eCommerce platforms on WordPress, Drupal, Shopify, Webflow, and React, delivered by a senior-only team at about half the cost of a large agency. We specialize in higher education, government, healthcare, nonprofit, aerospace and defense, financial services, and SaaS. As a Drupal Certified Bronze Partner, WP Engine Advanced Partner, WordPress.com Partner, Acquia Partner, and Shopify and Webflow Partner, we handle new builds, rebrands, complex CMS migrations, WCAG accessibility, and ongoing maintenance. We also build our own products, including SiteSonar, our AI-visibility tool that keeps clients found as buyers shift from Google to AI search, and we white-label web delivery for other agencies. Our work is fixed-price, transparent, and senior-led from kickoff through launch.Looking for work in Mobile AppLocated in Seattle, United StatesBudget on requestWorked in Technology Hardware & Equipment (+2)Speaks English11-50 membersChudovo OÜ
5(22 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.13 works in Mobile AppLocated in New York, United States (+4)From €5,000 for Mobile AppWorked in Hospitals & Healthcare (+19)Speaks English, German(+2)51-200 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 Mobile AppLocated in Potomac, United States (+4)From €10,000 for Mobile AppWorked in Construction (+10)Speaks English, German(+1)201-500 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.10 works in Mobile AppLocated in Loudoun County, United States (+2)From €3,000 for Mobile AppWorked in Banking & Financials (+7)Speaks English, Arabic(+3)51-200 memberslilAgents
(0 review)Let's automate your busywork & get your time back.
lilAgents helps medium-sized businesses get their team's time back. We automate the busywork humans don't need to do, so you can focus on moving the business forward. Think of a CRM that updates itself after every meeting, paperwork that gets chased before anyone can drop it, and a weekly owner report that writes itself. We build each automation with AI agents, starting with the tools and AI you already pay for, and only upgrade or replace what your use case needs. A human on our team watches the work and steps in if anything goes wrong. Everything runs in accounts you own, and we stay on as your partner as AI keeps changing, so you're ready for what comes next. Founded in Seattle in 2025 by David V. Kimball and Dylan Baker.Looking for work in Mobile AppLocated in Seattle, United StatesBudget on requestWorked in Real EstateSpeaks English1-10 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.Looking for work in Mobile AppLocated in Seattle, United StatesFrom €1,000 for Mobile AppWorked in AutomotiveSpeaks English201-500 membersFuzionDev LLC
5(12 reviews)AI & SaaS Development | Vibe Coding & App Rescue | DevOps & Cloud | Web & Mobile Apps
Highly recommendedHave a product to launch, an AI-built prototype to finish, or an application that needs a stronger technical foundation? FuzionDev LLC helps startups and growing businesses take the next step. We build AI-powered SaaS products, custom web and mobile apps, AI agents, chatbots, and workflow automations. OpenAI, Claude, and Gemini integrations connect AI capabilities with everyday business needs. Through Vibe Coding & AI-Built App Rescue, we improve applications created with Claude Code, OpenAI Codex, Cursor, Lovable, Replit, and Bolt. We review code, fix bugs, strengthen authentication and payment flows, and prepare products for real users. DevOps and cloud engineering support the application beyond launch: AWS infrastructure, CI/CD pipelines, Docker, Kubernetes, testing, monitoring, backups, and ongoing improvements. FuzionDev LLC is a US-registered software development company serving clients worldwide. From discovery and UI/UX to deployment and support, we focus on clear communication and practical next steps. Tell us what you’re building, what needs fixing, and your timeline.5 works in Mobile AppLocated in Sheridan, United StatesFrom €3,000 for Mobile AppWorked in Software & Computer Services (+9)Speaks English11-50 membersLuby
5(4 reviews)AI-native product engineering for fintechs and financial institutions, since 2002.
Top awardedLuby is a product engineering and dedicated team partner for tech companies, fintechs and financial institutions, and we work across many industries. We build: Middleware and system integrations Last-mile and API-driven architectures AI legacy modernization Customer journeys on scalable platforms We have been doing this since 2002, from an office in Miami and a delivery center in Brazil, with in-house senior engineers, ISO 27001 and ISO 27701 certifications and AWS and Google Cloud partnerships. We also build our own products: Finfy, a white-label financial operation, IrisLoan for lending, HarmoniaPay for payments, and Internet Banking, built with emerie. Our strength is turning potential into concrete results, combining creative minds with technology to overcome complex challenges and generate impact.8 works in Mobile AppLocated in Miami, United States (+1)From €20,000 for Mobile AppWorked in Logistics & Supply Chain (+10)Speaks English, Portuguese201-500 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 disciplines10 works in Mobile AppLocated in Cook County, United States (+2)From €10,000 for Mobile AppWorked in Others (+11)Speaks English51-200 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). AI Solutions - AI agents, LLM applications, intelligent automation, and AI-powered business solutions (OpenAI, Gemini, Claude, LangChain, GCP). 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). Awards & Recognition: Top Mobile App Development Company Clutch (2025) Best Web & Design Agency DesignRush (2025) Global Leader GoodFirms (2026) Top 10 IT Companies G2 (2025) Excellence in Digital Innovation AppFutura (2025) Clutch Global & Champion Badge (2023 & 2024) ISO-Certified Processes & 800+ Verified 5-Star Reviews4 works in Mobile AppLocated in New York, United States (+4)From €1,000 for Mobile AppWorked in E-commerce (+16)Speaks English, Dutch, Belgium(+5)201-500 membersApptech Systems
5(6 reviews)Your Enterprise’s Next Chapter Starts Here!
Top awardedFounded in 2017, Apptech has emerged as a reliable ally for organizations on their journey towards digital transformation. We specialize in crafting a suite of digital solutions that strategically leverage the transformative power of technology. Our core expertise encompasses bespoke software, innovative web and mobile applications, and robust enterprise solutions that guide our clients toward a prosperous digital future. We are proud partners with industry giants Microsoft and Amazon, utilizing their cutting-edge technologies to deliver exceptional results. Moreover, our operations extend from our headquarters in Türkiye to the United States and Saudi Arabia. Each office is equipped to serve regional clients with tailored expertise, making us a global player in the digital solutions arena. End-to-End Software Development Web & Mobile App Development AI & Machine Learning SaaS Development PoC/MVP Development App Modernization IT Consulting Quality Assurance Services Our mission is to help enterprises accelerate the adoption of new technologies, untangle complex issues that always emerge during digital evolution, and orchestrate ongoing innovation. Whether it is a consumer-oriented app or a transformative enterprise-class solution, the company leads the process from ideation and concept to delivery and provides ongoing support through its quality framework.13 works in Mobile AppLocated in Lodi, United States (+3)From €10,000 for Mobile AppWorked in Household Products (+12)Speaks English, Arabic11-50 membersAkveo
5(1 review)Here to Build
Akveo is an international software development firm that creates innovative digital solutions to help businesses grow. Specializing in custom software, low-code/no-code platforms, and UI/UX design, we empower companies of all sizes to turn their concepts into scalable, high-performing applications. As a certified Retool development partner and React Native expert (https://www.akveo.com/services/mobile-application-development/react-native), Akveo has successfully completed 500+ projects across sectors like finance, healthcare, eCommerce, and EdTech. Our team of experienced software engineers, designers, and business analysts works collaboratively to deliver top-quality solutions. From cross-platform mobile development to MVP creation and AI-driven automation, we are dedicated to providing exceptional results that surpass client expectations.8 works in Mobile AppLocated in Austin, United States (+2)From €1,000 for Mobile AppWorked in Insurance (+6)Speaks English, German(+2)51-200 membersUASOFTDEV
5(2 reviews)Founder-led staff augmentation of AI-Ready Senior Developers and Dedicated Teams in 60 hours
UASOFTDEV is a founder-led staff augmentation of AI-Ready Dedicated Teams and Senior Software Engineers for small-mid companies. We believe AI doesn't replace experienced engineers. It makes the right engineers dramatically more effective. That's why every developer we provide uses AI as part of their daily workflow with tools like Claude, Cursor and GitHub Copilot, while all architecture, technical decisions, code reviews and production releases remain under experienced human ownership. Main engagement models. Staff Augmentation for companies looking to extend their existing engineering team with senior talent, and AI-Ready Dedicated Teams for businesses that need a complete delivery team with technical leadership capable of owning products, features or entire engineering initiatives. Every engagement is led directly by our Founders. Aleksey, CEO, works closely with clients to understand product goals, business priorities and team dynamics. Oleksandr, CTO, personally evaluates every engineer for technical excellence, communication and problem-solving skills. Our work is built around four core values: quality, clarity, transparency and a personalized approach to every client engagement. The process is simple: after a discovery call, we match engineers to your technology stack, product domain and culture, present a CTO-vetted shortlist and run contracting alongside onboarding. Staffing typically happens within 60 hours. Today, our teams support startups and product companies across Europe, UK and North America. UASOFTDEV's track record includes a 97% first-candidate acceptance rate, a 95.65% first-match success rate and an average client engagement of over 13 months. Founders respond to critical issues within two working hours. Whether you need one senior engineer or an AI-Ready Dedicated Team, our goal is the same: help you ship faster with engineers who communicate clearly, contribute from day one and solve complex problems independently.1 work in Mobile AppLocated in New York, United States (+4)Budget on requestWorked in Beauty (+2)Speaks English11-50 membersPluto IT Solutions
4.9(41 reviews)Your Trusted Partner for IT, Cloud and Cybersecurity
Highly recommendedTop awardedPluto IT Solutions is a full-service IT and cybersecurity company helping organizations build, manage, secure, and modernize their technology environments. Our services include managed IT support, help desk services, cloud solutions, network and infrastructure management, Microsoft 365, IT consulting, software and API integration, cybersecurity, penetration testing, compliance support, and incident response. Serving businesses across Canada, the United States, the United Kingdom, and internationally, our experienced team delivers reliable, scalable, and security-focused solutions tailored to each client’s needs.Looking for work in Mobile AppLocated in Newark, United States (+2)From €3,000 for Mobile AppWorked in Architecture & Planning (+6)Speaks English201-500 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 Marketing11 works in Mobile AppLocated in Clarendon County, United States (+2)From €1,000 for Mobile AppWorked in Video games (+9)Speaks English51-200 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.7 works in Mobile AppLocated in New York, United StatesFrom €15,000 for Mobile AppWorked in Transportation (+12)Speaks English, Ukrainian51-200 membersCeladonsoft
5(7 reviews)Scalable systems for complex business operations — delivered with clarity and predictability.
We help growing and established companies turn complex software initiatives into clear, scalable, and well‑managed systems. Our job is more than just software design and development — our job is taking care of your success. We don't jump straight into development. We start with discovery, solution design, and business analysis to define scope, architecture, integrations, and priorities before a single line of code is written. This is how we reduce delivery risk and protect your budget. We focus on three solution domains: 1. Custom Business Systems & Operational Platforms 2. Mobile Products for Customers and Operations 3. AI‑Enabled Business Workflows (AI under senior engineering control) Our strongest industry experience is in Food & Beverage, Real Estate, and FinTech — with growing expertise in iGaming, EdTech, and Travel Tech. Why companies choose us: clarity before development, structured delivery with PM and QA, domain‑aware solutions, and AI‑accelerated senior engineering. We work best with growing mid‑market companies, multi‑location businesses, and organisations that have outgrown spreadsheets or disconnected tools. We work as an extension of your business, in tight communication and total transparency — so there's no waste of time on back‑and‑forth. Start with a Solution Discovery call – to clarify scope, architecture, and the right path before any build commitment.34 works in Mobile AppLocated in Tuckahoe, United States (+3)From €10,000 for Mobile AppWorked in Food (+23)Speaks English, German(+2)51-200 members