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Hire the best Java Developers in Denver, CO

Check out Java Developers in Denver, CO with the skills you need for your next job.
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  • $90 hourly

    • 4.6/5
    • (10 jobs)
    For most of my over 10-year career, I've written and debugged a variety of software and have solved various types of problems. At Techno-Sciences, this was primarily software which handled communication between hardware devices with different protocols, and getting them to work together as a maritime surveillance unit. With Polycom, it was software which handled communication between Polycom's DMA and external hardware components such as phones, web services, and video conferencing devices. Then, with Spectra Logic, I wrote automated test code to debug communication between Spectra's backup software and various hardware storage devices, as well as cloud storage services such as S3. Next, with RK Mechanical, I programmed software to import product and price data from various APIs and data sheets and consolidate it. After that, with Exolvo Designs Group, I am enhanced software for a search-and-rescue antenna configuration system. And now, with Versity, I've done Golang programming for a data storage analysis tool and am currently doing bats testing for an AWS S3 gateway. In addition to my current contract at Versity, I'm open to freelance work in any field I find engaging, fields where I can put software together to solve problems and improve my knowledge. Skills: * bash/bats * Golang * github-actions * REST API * React.js * Docker * AWS * SQL Server * Python * MongoDB * Java * C++
    vsuc_fltilesrefresh_TrophyIcon Java
    Selenium
    MongoDB
    C++
    API
    Web Development
    RESTful API
    Microsoft SQL Server
    Python
    JavaScript
    React
    Git
    Docker
    Data Scraping
    Golang
  • $35 hourly

    • 5.0/5
    • (5 jobs)
    Zazen Technologies specializes in developing highly sophisticated Mobile applications and Websites for Entrepreneurs and Small to Mid size companies. Our offices are in San Francisco and Denver! We also work with Angel Investors and VCs, along with offering our clients mentoring on how to develop and support a Technology Startup!! We have extensive experience with: Native iOS & Android app development Backend Development & architecture Crypto Currencies NFTs Blockchain Responsive web design & development Cross-platform development using frameworks like Phonegap and Xamarin eCommerce / FinTech Food Delivery Service Delivery Dating and Event Planning Social Media Health and Fitness Product design involves a UI/ UX designer laying out all the screens required for the platform with wireframes. Once those wireframes’ flows are approved, the app’s screens are designed, in part by taking the visual identity established in Platform Branding and using it as a jumping off point to establish the app’s look and feel. High-fidelity mocks are passed from our designers to engineers who code these frontend screens into existence. At the same time, backend engineers are building the behind-the-scenes pipes and engines that make your platform tick and operate effectively. Testing is heavily integrated into our Product Development process. We test the stability of the code as well as its ability to scale with platform growth. Testing is also incorporated to account for various phone devices and environments. Support and maintenance help is also available for clients once products are released. Clients owned 100% of the code once the product is completed. Read more about our engineering process iOS App Development Our rich technical expertise across different industry verticals helps you develop business-centric iOS apps that match your vision and engage your end-users. Our iOS application team is also specialized with the latest and most intuitive language SwiftUI to create interactive and scalable apps across all Apple devices (iPhone, iPad, macOS, WearableOS & others). Android App Development Unlock the potential of your business with our best-in-class Android app development services and advanced solutions. We are an award-winning mobile app development company that helps thriving enterprises bridge the gap between ideas and reality through custom and cloud-ready mobility solutions.At Zazen Technologies, we develop distinctive mobile apps that ensure a smooth and user-friendly interface for the end-users.
    vsuc_fltilesrefresh_TrophyIcon Java
    Blockchain Development
    LAMP Stack
    Blockchain
    Cryptocurrency
    WordPress
    AWS Cloud9
    MEAN Stack
    iOS Development
    Android
    PHP
    Kotlin
    iOS
    MySQL
    Swift
  • $40 hourly

    • 5.0/5
    • (9 jobs)
    Hey there! I'm a full stack developer with 5 years of experience building web applications from scratch. I'm based in beautiful Denver, Colorado, where you can most likely find me at a coffee shop in front of stunning mountain views with my dog, Omena! My passion is creating user-friendly and efficient web applications that meet the specific needs of my clients. I specialize in using the Django framework while also being skilled in HTML, CSS, JavaScript, React, Node.js, MongoDB, and MySQL, among others. I also have experience with AWS and Google Cloud Platform, as well as deploying applications on platforms like Heroku. I'm a detail-oriented person who prides myself on delivering clean, efficient, and well-documented code. I'm committed to delivering high-quality work on time and within budget, and I'm always happy to go the extra mile to exceed my clients' expectations. Communication is key to a successful project, and I'm always available to discuss project details and answer any questions that may arise. I take a collaborative approach to development and believe that working closely with my clients is the best way to achieve outstanding results. If you're looking for a reliable and experienced full stack developer who's passionate about what they do, feel free to reach out. I'd love to chat with you about your project and how I can help bring your ideas to life.
    vsuc_fltilesrefresh_TrophyIcon Java
    WordPress Website
    CSS 3
    HTML5
    Database Development
    API Development
    C#
    Software Development
    Django
    Website Maintenance
    Custom App
    Front-End Development
    Node.js
    Python
    JavaScript
  • $65 hourly

    • 5.0/5
    • (3 jobs)
    Experienced software engineer with a broad range of experience in computer vision, robotics, and mobile. Check out my LinkedIn for more info!
    vsuc_fltilesrefresh_TrophyIcon Java
    Amazon Web Services
    OpenCV
    Node.js
    NumPy
    Data Scraping
    SQL
    PyTorch
    Kotlin
    Computer Vision
    Web UI
    Computer Science
    JavaScript
    C++
    Python
  • $165 hourly

    • 5.0/5
    • (1 job)
    Generalist programmer with professional experience in: * eCommerce - integrating federated GraphQL APIs with platforms like Shopify to inform international shoppers with duty + tax calculations and provide merchants a guaranteed landed cost for their shipments * Cloud Computing - designing and building API services on GCP Cloud Run to automate the process of identifying and removing personal information from directory websites * Devops - Producing IaC definitions and CI/CD automation to perform reliable rollouts and rollbacks for cloud-hosted Java microservices that power a SaaS API * Mobile Applications - building native applications and PWAs with flutter and dart that present attractive UIs and consistent UXs across all android and iOS platforms * Web Development - building SEO-optimized landing pages with >90 pagespeed insight scores, extensible user and admin dashboards, and secure SSO login flows for frontend web interfaces * IoT - designing, fabricating, and installing custom electronic escape room puzzles as well as writing and content creation, focused on technical tutorials and documentation. I have an expert level of familiarity with Java, Javascript, Typescript, and Python, and can be immediately productive in any stack built with popular and/or well-documented technologies.
    vsuc_fltilesrefresh_TrophyIcon Java
    CI/CD
    Terraform
    Bash Programming
    Ansible
    Amazon Web Services
    Microsoft Azure
    DevOps
    Django
    TypeScript
    JavaScript
    PostgreSQL
    React
    Docker
    Python
  • $100 hourly

    • 5.0/5
    • (3 jobs)
    I’m Paul, a seasoned web developer and CRO specialist with over 8 years of experience. Over the course of my career, I’ve had the opportunity to work with a wide variety of businesses from startups to publicly traded companies. In fact, you may recognize a few of my clients: Guy Fieri Manscaped Scotts Miracle-Gro Red Bull Samsung Western Governors University Scholl Atom Tickets Litter Robot Prestigify Graphene-X GymWear UK Chloe Dao Napapijri Formula Fun Foamies NASM (National Academy of Sports Medicine) When it comes to CRO, there are no "one-size-fits-all" solutions. If we were to work together, I would take the time to understand your problems and craft a unique plan to achieve them. That being said, most of my CRO projects begin with a thorough audit of website performance, where I conduct user research and analytics reviews to identify user behaviors and key pain points, focusing on foundational optimizations upfront. After that, I usually move into audience-focused, behavior-driven personalization and A/B testing. Over time I continue to perform iterative testing and refinement to improve conversion rates. For my web development projects, I typically begin by gathering requirements and identifying opportunities to enhance user experience. Then, I create prototypes and incorporate your feedback before proceeding with development and integrations that prioritize both functionality and user experience. After the development phase, I conduct user testing to ensure the site operates smoothly across all devices. And after deployment, I offer ongoing support for updates and optimizations as needed. I have experience using the following tools and platforms for CRO and web development projects: VWO Hotjar Django Flask Node.js React.js Next.js Optimizely Shopify Plus Adobe Target Selenium WebDriver I’m proficient in the following languages: Python Java Kotlin Javascript CSS HTML Liquid SQL (PostgreSQL, MySQL) PHP C# Whether you need assistance with website optimizations, web development projects, or UX/UI research, I'm here to help. If you think we could be a good fit, feel free to send me a message! I’d love to learn more about your business and explore how we’d work together.
    vsuc_fltilesrefresh_TrophyIcon Java
    Web Analytics
    Website Audit
    API
    Shopify Website Design
    Landing Page Optimization
    Website Optimization
    UX & UI
    JavaScript
    Python
    UX Research
    Web Development
    Data Analytics
    A/B Testing
    Conversion Rate Optimization
  • $30 hourly

    • 5.0/5
    • (5 jobs)
    “It was a true pleasure working with Diana! It’s a rare thing to find someone with such exceptional technical and design skills—with the added bonus of being extremely kind, patient, and customer-focused! Working with Diana is a true partnership & She made—what could’ve been overwhelming—into a fun project. She has great communication skills, eager to learn and communicate well as a contractor. She is detail orientated but proactive in strategy and someone who can take your vision and build something phenomenal! 10/10 stars! I would definitely recommend her, she cannot disappoint, and I wish I can keep her all to myself! “ Pauline Malubay, Ventures In Product "Whoa! “Don’t you dare steal my babysitter! She is prompt, efficient, I find the place in great shape, better than I left it, homework is done, and I couldn’t replace her!” Sooo, we’ve all had that special person, and yes, no sharing allowed…… But we learned to share, – hopefully- and here we go……… A little tongue in cheek, but it’s true. When you find somebody exceptional you don’t want to share but, really, you want them to explore, grow, and to build. Diana is one of the best individuals I’ve found in my entrepreneurial journey to make that happen. OK, I’ll share…… Diana is pleasant, intuitive, a self-starter, and about everything someone would need to go to the next step in this complex digital and social world, and to be that assistant you’ve always wish you had. Where are the stars? Well, they’re five plus. I can’t give more than five, but Diana is one of those energetic individuals that you want to work with, time and again. I’ve worked with many, some to a big YIKES! Not so with Diana – I can’t recommend her enough. HC Hansen MD CEO, Pain Relief Centers Hi, Diana here. I’m a US-based Technical Virtual Assistant When you work with me, we both have the same goal, maximizing your ROI. Meeting your standards for high-quality work and delivering on time are my top priorities. I’m also a continual learner. I invest in my professional skills to provide you with the best possible service. Please send me a message with information about your goals and needs. From there, we can discuss your requirements in more detail.
    vsuc_fltilesrefresh_TrophyIcon Java
    Microsoft Word
    Microsoft PowerPoint
    Microsoft Excel
    Thrive Themes
    Amazon Listing
    Camtasia
    Kajabi
    Google Workspace
    WordPress
    ConvertKit
    Canva
    Amazon Book Category Research
    Formatting
  • $65 hourly

    • 0.0/5
    • (0 jobs)
    I believe that technology should be used to help people. Using my skills as a software engineer, I am working towards this goal by creating innovative ideas that are distributed right to this generation’s pockets. My expertise lies in the software development of mobile applications on both the iOS and Android platforms. From working with top Fortune 500 companies to bleeding edge of the startup industry, I have been able to help oversee the development and maintenance of different apps for the past 8 years. Self- motivated with a solid work ethic. Highly adaptable to any environment and skilled at multi-tasking and maintaining strong attention to detail.
    vsuc_fltilesrefresh_TrophyIcon Java
    Swift
    Objective-C
    SQLite
    Android App Development
    Flutter
    iOS Development
    Kotlin
    Firebase
    Hybrid App Development
  • $50 hourly

    • 0.0/5
    • (0 jobs)
    I’m a backend developer with 10+ years of experience building scalable, event-driven architectures. I specialize in AWS serverless solutions for startups. By leveraging services like Lambda, DynamoDB, and API Gateway, I help businesses handle traffic spikes seamlessly, keep infrastructure costs low, and integrate with APIs, so founders can focus on growth instead of server management.
    vsuc_fltilesrefresh_TrophyIcon Java
    CI/CD
    API
    Solution Architecture
    Serverless Computing
    Shopify Apps
    PostgreSQL
    Flask
    Amazon Web Services
    Amazon DynamoDB
    AWS Lambda
    Terraform
    TypeScript
    Python
  • $50 hourly

    • 0.0/5
    • (0 jobs)
    Full Stack Software Engineer with Over 10 Years of Expertise. I'm a seasoned full stack engineer with a decade of experience at leading companies, including SpaceX and Airbnb. I specialize in creating scalable, efficient solutions across frontend and backend technologies, with a deep command of Java, TypeScript, React, Python, and SQL. Whether you need an entire application developed from scratch or improvements to existing infrastructure, I bring a proven track record of delivering robust, impactful results. Let’s discuss how I can support your business goals with innovative and reliable software solutions!
    vsuc_fltilesrefresh_TrophyIcon Java
    CSS
    HTML
    C#
    SQL
    JavaScript
    Python
    Web Application
    Product Development
    Web Development
    React
    TypeScript
  • $35 hourly

    • 5.0/5
    • (3 jobs)
    I come from a firm background within the academics of computer science, while I currently do not have professional experience as a software engineer, I am looking forward to working with many clients here on UpWork to obtain a firm background of professional experience. It is with strong determination, passion, and my acquired knowledge in this field to provide every client with an absolutely stunning final product, where not only beauty and simplicity is of high value, but easy maintainability and an agile approach towards building something great for all of my clients.
    vsuc_fltilesrefresh_TrophyIcon Java
    Swift
    Objective-C
    jQuery
    HTML
    CSS 3
    CSS
    PHP
    HTML5
    JavaScript
  • $3 hourly

    • 5.0/5
    • (1 job)
    I am a programmer with academic experience creating websites, managing databases, and creating programs. Looking to do work for free in order to gain experience.
    vsuc_fltilesrefresh_TrophyIcon Java
    Node.js
    React
    CSS
    HTML
    JavaScript
    SQL
    Python
  • $75 hourly

    • 0.0/5
    • (0 jobs)
    I believe that technology should be used to help people. Using my skills as a software engineer, I am working towards this goal by creating innovative ideas that are distributed right to this generation’s pockets. My expertise lies in the software development of mobile applications on both the iOS and Android platforms. From working with top Fortune 20 companies to the bleeding edge of the startup industry, I have been able to help oversee the development and maintenance of different apps for the past 8 years. While developing applications through my career has been fulfilling, I found myself still wanting to do more.
    vsuc_fltilesrefresh_TrophyIcon Java
    Apple Xcode
    Mobile App Development
    Flutter
    Ruby
    iOS
    Android
    React Native
    PHP
    Python
    Kotlin
    Swift
  • $21 hourly

    • 0.0/5
    • (1 job)
    I am a senior at Colorado State University, where I am majoring in Computer Science with a Software Engineering concentration.
    vsuc_fltilesrefresh_TrophyIcon Java
    C
    Scrum
    GitHub
    React
    Python
    JavaScript
  • $20 hourly

    • 0.0/5
    • (1 job)
    I'm a Computer Science student familiar with Java. I'm looking to expand my skillset and build the foundations to learn other programming languages and begin a career in software development.
    vsuc_fltilesrefresh_TrophyIcon Java
    Software Development
  • $10 hourly

    • 0.0/5
    • (0 jobs)
    I’m a Computer Engineering graduate and software developer passionate about building innovative, efficient, and scalable technology solutions. With expertise in C++, Python, Java, and Bash, and hands-on experience in embedded systems and automation, I bring a unique blend of software and hardware skills to every project. From designing custom firmware on Microchip and ESP32 controllers to implementing secure encryption (AES, RSA) and hashing (SHA-256) protocols, I ensure that my solutions are both robust and forward-looking. I’ve created streamlined workflows using Python and Bash scripts, built custom Raspberry Pi-powered devices, and supported diverse OS environments (Linux distributions, Windows). I thrive in fast-paced, collaborative environments and excel at translating client needs into impactful, reliable outcomes. Whether it’s optimizing system performance, integrating hardware and software components, or enhancing user experience, I approach each challenge with a detail-oriented and results-focused mindset. Additionally, as a volunteer Salesforce Developer for International Medical Relief, I’ve successfully integrated Salesforce with WordPress and improved the platform’s efficiency and reliability, demonstrating my adaptability and versatility across different tech stacks. Let’s work together to bring your ideas to life with high-quality, scalable solutions that drive tangible results for your business.
    vsuc_fltilesrefresh_TrophyIcon Java
    JavaScript
    TypeScript
    Web Development
    Scripting
    Linux
    Virtualization
    C++
    Python
    Bash
  • $13 hourly

    • 5.0/5
    • (1 job)
    I have more than 10 years of experience in CMS . I have worked on many Joomla and wordpress sites.
    vsuc_fltilesrefresh_TrophyIcon Java
    PHP
    Joomla
    PSD to HTML
    JavaScript
    AJAX
    Adobe Photoshop
    CSS 3
    jQuery
    HTML5
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