Hire the best Java Developers in New York

Name: Java developers
Brand: Upwork
Rating: 4.8 (162 reviews)

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Clients rate Java developers

4.8/5

based on 162 client reviews

$65 hourly
Devon B.
- 5.0/5
- (8 jobs)
Hello! My name is Devon, and I am a highly skilled professional with a diverse skill set that includes expertise in audio and music production, web design and development, social media writing, social media content design, resume editing, and Python development. With a degree in Computer Science from Yale University and six years of experience in the technology industry and as an independent musician, I bring a unique blend of technical knowledge and creative prowess to my work. Please see my specialized profile on "Music Production" for the audio and music services and the "Web Design" profile for my expertise in web design and development. As a social media writer, I have a keen understanding of crafting compelling and engaging content that resonates with target audiences. I specialize in creating impactful posts, captivating captions, and attention-grabbing headlines across various social media platforms. With a strategic approach and a flair for storytelling, I can help you establish a strong online presence and effectively communicate your brand's message. Additionally, I possess the skills of a social media content designer, enabling me to combine visual aesthetics with effective communication. I can create eye-catching graphics, infographics, and multimedia content that aligns with your brand identity and enhances engagement on social media. By leveraging my design skills, I ensure that your content stands out and captures the attention of your target audience. Furthermore, my expertise extends to resume editing, where I can help you showcase your skills and experience in the best possible light. With 3 years of experience hiring software engineers at Vimeo, I can optimize your resume to highlight your key achievements and make a strong impression on potential employers. Whether you're a recent graduate or an experienced professional, I can craft a tailored resume that showcases your unique strengths and maximizes your chances of success. Lastly, my proficiency in Python development allows me to undertake a wide range of technical projects. I can develop custom software solutions and automate tasks using Python's robust and versatile capabilities. With a strong foundation in computer science and years of hands-on experience, I can deliver efficient and scalable Python-based solutions that meet your specific requirements. As a freelancer, I pride myself on my professionalism, attention to detail, and commitment to delivering high-quality work. I value clear communication and collaboration with my clients to ensure that their goals and expectations are met. I'm excited about the possibility of working together to achieve your objectives. If you have any questions or would like to discuss your project further, please feel free to reach out. Let's collaborate to bring your ideas to life!

Java
Social Media Imagery
Audio Editing
Content Writing
Python
Web Design
Stem Mixing & Mastering
Music Composition
Squarespace
Audio Mastering
Resume Writing
Music Production
Editing & Proofreading
$100 hourly
Brian R.
- 4.7/5
- (11 jobs)
I have been a professional mobile app developer for the last decade. I specialize in native Android. Over the last decade I have developed and delivered dozens of high quality mobile apps successfully for established companies, startups, and individual entrepreneurs. What I can offer: - Over a decade of native Android and Kotlin experience - iOS, Swift, Java - Kotlin-Mutli-Mobile, KMM - Flutter and Dart - UI/UX Design

Java
CI/CD
CircleCI
Agile Software Development
Cross Functional Team Leadership
Android UI Design
Android App
Apple Xcode
Android SDK
iOS
Swift
Android App Development
Android Studio
Android
Kotlin
$60 hourly
Minhaz M.
- 4.9/5
- (10 jobs)
I am an experienced full-stack mobile application developer with over 12 years of experience helping clients design and build high-quality mobile applications. I've developed and updated hundreds of successful applications for clients in different industries, ranging from startups to established companies. #Technologies# - Hybrid / Cross-platform: Flutter, React Native, Dart, JS, Firebase, AWS DynamoDB, Single Sign On, Parse SDK, Open AI API - Android: Java, Android Studio, XML, Jetpack, Android annotations,sqlite, Room, realm, firebase, parse sdk, AWS Single Sign On. - iOS: Swift, Xcode, Storyboard, Xib, Sqlite, Realm, Firebase, Parse Sdk, Single Sign On. - ML: NLP, Python, Pandas, Langchain, GPT, LLM, Fine-Tuning, Prompt Engineering, Streamlit, gradio, huggingface, transformer #Frontend# - JavaScript, TypeScript, React, Redux, HTML, CSS, Next.Is, Flutter #Backend# - Java EEE, Spring, Python, Node.js, Express.js,nest.js. Django #Databases# - GraphQL, MongoDB, MySQL, DynamoDB #Cloud Services# - Firebase, Heroku Scrum / Agile, AWS #Source Control# - Github, Bitbucket, Gitlab #Project Management# Jira, Trello, Github Projects #Design Tool# Figma, Adobe XD, Draw IO, Pencil #Software Architectures# - MVP, MVC, MVVM, Solid principles My ability to remain flexible and adaptable to project demands and shifting priorities sets me apart. I thrive in unfamiliar situations and enjoy learning opportunities and exposure to new ideas and experiences. I am open and willing to learn whatever is necessary to accomplish my client's goal.

Java
Program Management
Data Analytics & Visualization Software
Product Management
Google Cloud Platform
SQL
BigQuery
Data Modeling
Deep Learning
Team Management
Machine Learning
Swift
Kotlin
Git
Jira
Python
Dart
LLM Prompt Engineering
iOS Development
Android App Development
Flutter Stack
Project Management
$150 hourly
Mark H.
- 5.0/5
- (58 jobs)
I'm the founder of Salesforce and HubSpot partner agency Rare Karma. I focus on helping organizations customize Salesforce to meeting the unique needs of their sales and marketing teams. With both an MBA and a PhD in Computer Science from MIT, I efficiently translate business requirements into well-designed and implemented technical solutions. I have broad experience with sales automation and digital marketing - supporting SVPs and C-level executives to achieve sales and marketing objectives. Primary Services * Salesforce Development (Apex, SOQL) * Fractional Salesforce Administration * Salesforce - HubSpot Integration Together with my partner, we have multiple certifications including: - Salesforce Certified Administrator - Salesforce Certified Platform App Builder - Salesforce Certified Platform Developer I - Salesforce Certified Service Cloud Consultant - Salesforce Certified Sales Cloud Consultant Beyond Salesforce, I'm a well-rounded full-stack developer with deep experience in the following areas. Programming Languages * Java (including Apex) * SQL (including SOQL) * Python * JavaScript (Node) * PHP Databases * Google BigQuery * Snowflake * MySQL * Oracle

Java
ETL Pipeline
SQL
Apex
Salesforce
Salesforce App Development
Vue.js
Database
Python
BigQuery
Snowflake
Flask
HubSpot
$30 hourly
Gabriela B.
- 5.0/5
- (7 jobs)
🙌🏽 500+ Financial Models Built 👩🏻‍🎨200 Decks Designed $75𝗠+ 𝗶𝗻 𝘀𝘁𝗮𝗿𝘁𝘂𝗽 𝗳𝘂𝗻𝗱𝗶𝗻𝗴 𝗿𝗮𝗶𝘀𝗲𝗱 💃🏻 Member of Numberly team with combined 75 years of 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 with Startups and Financial Services 📡𝗞𝗶𝗻𝗱, 𝗧𝗿𝗮𝗻𝘀𝗽𝗮𝗿𝗲𝗻𝘁, 𝗠𝗮𝘁𝘁𝗲𝗿 𝗼𝗳 𝗳𝗮𝗰𝘁 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗼𝗿 📞 Invite me to your job and we can book a complimentary 30-minute consultation together that I know you'll find extremely helpful even if you decide not to work together 📞 Here’s a brief summary of how I help my clients most often: ✅ 𝗧𝗲𝗹𝗹𝗶𝗻𝗴 𝘁𝗵𝗲 𝗺𝗼𝘀𝘁 𝗰𝗼𝗺𝗽𝗲𝗹𝗹𝗶𝗻𝗴 𝘀𝘁𝗼𝗿𝘆 𝘁𝗼 𝗶𝗻𝘃𝗲𝘀𝘁𝗼𝗿𝘀 through numbers in a Financial Model, through words in a Pitch Deck, and strategy in a Business Plan so they can raise funds successfully. ✅ 𝗕𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗶𝗻𝘁𝘂𝗶𝘁𝗶𝘃𝗲 𝗮𝗻𝗱 𝗲𝗮𝘀𝘆-𝘁𝗼-𝘂𝘀𝗲 𝗙𝗶𝗻𝗮𝗻𝗰𝗶𝗮𝗹 𝗠𝗼𝗱𝗲𝗹𝘀 that allow them to run their business more effectively as small business owners. ✅𝗔𝗱𝘃𝗶𝘀𝗶𝗻𝗴 𝘀𝘁𝗮𝗿𝘁𝘂𝗽 𝗳𝗼𝘂𝗻𝗱𝗲𝗿𝘀 on growth, fundraising, proven investor strategies, and financial management best practices. Why I’m worth talking to: ✅ I've been doing this for a while and can leverage my experience working with other founders just like you 🔎 I can provide you with the highest quality deliverables at relatively low cost 🕵️‍♀️ I'll be honest, transparent, and work with you to get you exactly what you need. Thank you for reading my profile 🙏. If you invite me to your job, we can talk more about how to achieve your goals. Gabriela Betancourt "Excellent to work with and I hope to work with her again!" - Saied G, PDF Office

Java
CSS
Swift
HTML
Python
Mobile App Design
Adobe Photoshop
Adobe XD
Adobe After Effects
$24 hourly
Muhammad A.
- 5.0/5
- (2 jobs)
Hi, I’m 𝐌𝐮𝐡𝐚𝐦𝐦𝐚𝐝 𝐀𝐦𝐢𝐫, a Mobile App Developer with 10+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 creating iOS and Android apps that users love. I use Flutter and React Native to build fast, scalable apps for startups and businesses. My apps solve real problems, like boosting sales, improving user engagement, or streamlining workflows. Let’s work together to turn your idea into a powerful mobile solution. 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: ✅ 𝐂𝐫𝐨𝐬𝐬-𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐀𝐩𝐩𝐬: Build iOS and Android apps with Flutter and React Native (one codebase, two platforms). Save time and money while keeping performance smooth and animations crisp. ✅ 𝐍𝐚𝐭𝐢𝐯𝐞 𝐀𝐩𝐩 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐬: iOS (Swift): Add advanced features like Face ID, AR, and in-app purchases. Android (Kotlin): Integrate Google Maps, background services, and Material Design. ✅ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐏𝐈𝐬: Connect apps to REST APIs, Firebase, or custom Node.js backends. Real-time features like chat, notifications, and live updates. ✅ 𝐒𝐩𝐞𝐞𝐝 & 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞: Optimize apps to load in under 2 seconds and work flawlessly on older phones. Fix laggy animations, reduce app size, and crush bugs. 𝐂𝐚𝐬𝐞 𝐒𝐭𝐮𝐝𝐲: Food Delivery App for 50K+ Users A startup needed an app to handle food orders and real-time tracking. Using Flutter,𝐈 𝐛𝐮𝐢𝐥𝐭 𝐚 𝐜𝐫𝐨𝐬𝐬-𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐚𝐩𝐩 𝐰𝐢𝐭𝐡: ➜𝐋𝐢𝐯𝐞 𝐆𝐏𝐒 𝐭𝐫𝐚𝐜𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐝𝐫𝐢𝐯𝐞𝐫𝐬. ➜𝐏𝐮𝐬𝐡 𝐧𝐨𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐟𝐨𝐫 𝐨𝐫𝐝𝐞𝐫 𝐮𝐩𝐝𝐚𝐭𝐞𝐬. ➜𝐒𝐭𝐫𝐢𝐩𝐞 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐟𝐨𝐫 𝐬𝐞𝐜𝐮𝐫𝐞 𝐩𝐚𝐲𝐦𝐞𝐧𝐭𝐬. ➜𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞 𝐛𝐚𝐜𝐤𝐞𝐧𝐝 𝐟𝐨𝐫 𝐫𝐞𝐚𝐥-𝐭𝐢𝐦𝐞 𝐝𝐚𝐭𝐚. 𝐑𝐞𝐬𝐮𝐥𝐭𝐬: 4.8-star rating on both app stores. Orders processed 30% faster. Client revenue doubled in 6 months. 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? ✔ Reliable & Fast: I deliver on time, every time. ✔ No Tech Jargon: I explain everything clearly and keep you updated. ✔ Post-Launch Support: Fix issues, add features, or scale up anytime. ✔ Custom Solutions: Apps tailored to your business goals. Let’s Build Your App Invite me to discuss your project. I’ll help you create an app that’s fast, user-friendly, and ready to dominate the iOS and Android markets. 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐅𝐥𝐮𝐭𝐭𝐞𝐫, 𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞, 𝐢𝐎𝐒, 𝐀𝐧𝐝𝐫𝐨𝐢𝐝, 𝐂𝐫𝐨𝐬𝐬-𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦, 𝐄-𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐀𝐩𝐩𝐬, 𝐔𝐈/𝐔𝐗, 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐅𝐢𝐠𝐦𝐚, 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐀𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬, 𝐀𝐑 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧, 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧

Java
Kotlin
React
React Native
AI Mobile App Development
Native App Development
Hybrid App Development
App Design
Mobile App Testing
Mobile App
Flutter
App Development
iOS Development
Android App Development
$45 hourly
Rajkamal S.
- 4.7/5
- (10 jobs)
With over 5 years of progressive experience as a Mobile App developer, I have an extensive understanding of business processes across various industries. I excel at solving complex problems and building secure, high-performance solutions tailored to unique business needs. I excel in Swift, Kotlin, React Native, and Flutter for building state-of-the-art solutions. I have worked comprehensively in healthcare, e-commerce, on-demand services, and many more. Understanding Your Business I believe that a one-size-fits-all approach doesn’t lead to successful outcomes as every business is unique. I conduct a thorough discovery phase for each project to better understand your specific goals, challenges, and deliverables. By ensuring we are aligned from the start, I can develop applications that are precisely tailored to your needs, resulting in a 100% success rate. UI/UX I emphasize on making seamless UI/UX designs. While creating UI/UX I prioritize user-friendly design principles to ensure that the app is not only visually appealing but also easy to navigate. User experience has always been my top priority. My portfolio includes more than 30 apps for both the Apple App Store and Google Play store and most of them are with 100,000+ traffic a day. The approach I follow: ↳ Requirement Analysis ↳ Designing ↳ Development ↳ QA Testing ↳ Deployment ↳ Maintenance Technical Expertise: iOS: Swift/Objective C Android: Java/Kotlin Cross-platform: Flutter (Dart) React Native & Hybrid: HTML5, CSS3, Java Script Design: Figma, Sketch, Invision Cloud: Firebase, AWS Databases: Realm, Firestore, SQLite IDEs: Android Studio, Xcode Version Control: GitHub, Bitbucket Architectures: MVVM, MVP, Clean Code Project Management: Airtable, Asana, Trello, Basecamp Client-Centric Approach My main priority is long-term client relationships and I firmly believe in providing transparent communication throughout the project lifecycle. I focus on delivering measurable results that will help you in achieving your goals. Let’s Build Something Great Together If you are looking to build a new mobile app, revamp an already existing one, or have some bugs which are not being resolved, look no further. With my experience and expertise, you can sit back and relax while I turn your vision into reality. Let's Build Something Great Together! -Raj

Java
Graphic Design
CSS
Web Design
HTML
Stripe
Agile Software Development
In-App Purchases
Chat & Messaging Software
Camera
Android
Twilio API
AngularJS
Node.js
Firebase
$65 hourly
Meyer Y.
- 5.0/5
- (1 job)
I'm a seasoned developer with expertise in advanced blockchain solutions, smart contracts, web development, and design. With a passion for innovation and a keen eye for detail, I've dedicated myself to helping businesses materialize their digital aspirations. My Specializations: Blockchain Solutions: Blockchain Advisory: Strategic guidance to help you unravel the intricacies of the blockchain world. Blockchain Consulting: Personalized strategies to tap into the immense potential of blockchain technology. Smart Contract Development: Craft secure and efficient smart contracts to optimize your business operations. Cryptocurrency Integration: Expertise in melding cryptocurrency transactions seamlessly into existing systems. Web Development & Design: Web Development: Build robust, scalable websites focused on delivering smooth user experiences. Web Design: Design aesthetics that are not only visually engaging but also resonate with your brand's identity. SEO Services: Adopt strategic SEO techniques to boost your online prominence. E-commerce Solutions: Develop e-commerce platforms tailored to your needs, ensuring user convenience and utmost security.

Java
Blockchain
Node.js
WordPress
Solidity
React
Visual Basic for Applications
$60 hourly
Stephen D.
- 5.0/5
- (7 jobs)
🔵 Software Engineer and Embedded Systems Engineer. 🔴 Rapid R&D to quickly implement integrated technologies and services With over 6 years of experience in fabrication and 3 years in software, I have worked with clients across multiple industries of technology, design, and architecture. I strive to keep my approaches data-driven and design-minded with a high propensity toward each client's unique focus. I work to beat deadlines when possible and provide ongoing support and modular tools that are meant to be built upon and easily managed. C++, Java, Lisp, OCAML, Arduino, Raspberry Pi, Sketchup, 3D printing, CNC

Java
React Native
R
Arduino
Embedded System
JavaScript
C++
SQL
Node.js
Python
$50 hourly
Alain A.
- 5.0/5
- (8 jobs)
I am a multi-faceted Software Developer based in NY, with a comprehensive skill set encompassing Unity, C#, game development, Professional 2D design, UI/UX design, and animation. My technical expertise further extends to working with APIs and employing robust cloud storage solutions like Firebase, all of which underpin my mastery in backend operations. My portfolio showcases a variety of fully realized applications launched on the iOS and Google Play stores, along with substantial projects executed for medical giant, Henry Schein. These projects not only demonstrate my technical proficiency but also my ability to blend aesthetic design and user-centric functionalities, ensuring an engaging user experience. Through these ventures, I continue to innovate and deliver impactful solutions within the competitive tech landscape, always striving for excellence in every facet of software development and design.

Java
2D Art
2D Illustration
2D Game Art
GUI Design
Unity
HTML
C#
C++
JavaScript
SQL
CSS
$85 hourly
Joseph D.
- 5.0/5
- (26 jobs)
Upwork Certified in JavaScript backend (Node.js) development. I am an experienced programmer of consumer facing applications and services, with a background building in the arts, publishing, and education industries. I have been designing, developing, and assisting with software projects in a number of categories • Web and game development with HTML5/JavaScript (CreateJS, ZIM) • Mobile development with Flutter/Dart, and Adobe/Harman AIR • Full stack development with Java EE and LAMP I have also helped resurrect or restore control over a number of JavaScript and Animate projects. If you find yourself facing a deadline, or need assistance untangling a codebase, please get in touch and we can talk about how get things aligned again. My projects have included: • A TV/Film production prop iPhone app to simulate calls, texting, and VFX screens (AIR, Flutter) • JavaScript games for TV/Entertainment using CreateJS/EaselJS (GSAP) and ZIM (HTML5 Canvas) • The re-architecture and substantial coding and rework of a medical training program (JS) • The addition of key features to a StoryLine 360 product (PDF printing via JS) • A self-publishing photo album service with mobile page design, image manipulation, painting and sticker functions. Required 3rd party REST integration with other commercial services (AIR) • Archery scoring application for iOS, ranked as high as #16 in the Sports category (AIR) If you have a JavaScript or Animate project that needs creation or work, it is likely that I can provide for you. Drop me a line and we’ll discuss what can be done.

Java
Game Development
Game Design
ECMAScript 6
Adobe Illustrator
Flutter
Adobe AIR
ActionScript
Adobe Animate
HTML5
Dart
JavaScript
Adobe Photoshop
$75 hourly
Sidarth R.
- 4.7/5
- (22 jobs)
Hi there! I'm Sidarth Raman, a dedicated software engineer with a strong academic background from Brown University and professional experience at top tech companies like Salesforce and Loom. I specialize in full-stack development, machine learning, and scalable solutions. I am skilled in Python, JavaScript (React, Node.js, TypeScript), Java, SQL, and more! I’m passionate about solving complex problems and delivering high-quality software solutions. Whether you need help with full-stack development, machine learning models, or anything in between, I’m here to help bring your ideas to life! Let’s collaborate to make your project a success!

Java
SQL
Machine Learning
React
JavaScript
Python
$50 hourly
Gabriel S.
- 5.0/5
- (3 jobs)
I am an experienced freelance software developer with over 5 years of experience building web & and desktop applications, writing automation and data scraping scripts, and creating custom software solutions. I write custom code tailored to the client's needs. I have experience as well building machine-learning models to project future business analytics as well as solving classification problems. I work most effectively given well-defined specifications including website URLs, keywords, search terms, preferred output format, and update frequency. I am always learning and growing within the tech world. Techstack: - Languages: Python, C++, C, Javascript, SQL, React, Node.js - Web/Framework/Databases: PostgreSQL, MongoDB, Postgres, Django, React Native - Miscellaneous: AWS, Firebase, Rest APIs

Java
React
HTML
JavaScript
C
Python
PostgreSQL
C++
MongoDB
$60 hourly
Darnell L.
- 5.0/5
- (6 jobs)
I bring over a decade of proven success in collaborating with organizations to drive innovation through technology, websites, and applications. My approach is characterized by meticulous attention to detail and a commitment to delivering software solutions that stand the test of time within your company. I excel at deciphering project requirements, providing clear and actionable feedback, and simplifying technical concepts for cross-functional teams. Throughout my career, I've had the privilege of leading teams, providing training, and offering coaching to foster professional growth. Transparency and integrity are at the core of my work ethic, and I'm passionate about solving complex challenges, both in and outside of code. I find immense satisfaction in contributing to projects that positively impact people's lives. In terms of technology, I'm proficient in Java, Python, JavaScript, PHP, and various RDBMS/NoSQL data stores. I offer end-to-end solutions, including seamless deployments to leading cloud platforms such as Google Cloud Platform, Amazon Web Services, and Digital Ocean. My expertise extends to open-source web frameworks like Django, Codeigniter, Laravel, Liferay, Magento, and WordPress, where I've built marketing sites, web applications, and customer portals, often developing custom modules and extensions. I also possess a knack for rapidly implementing static sites based on HTML5 templates. I've had the privilege of collaborating with a diverse range of companies and industries, from Fortune 500 corporations to non-profits and esteemed educational institutions.

Java
Django
Database
Google Cloud Platform
Magento 2
Website Maintenance
Extension & Module Development
Web Application
Git
Customer Portal
Liferay
CSS
Python
CMS Development
Website
PHP
$100 hourly
Shimon M.
- 4.9/5
- (39 jobs)
Have an idea? Working on your MVP? Need a quality web app built fast? I help small and large clients create beautiful and fully functional web apps using the power of bubble.io, a no-code full stack development platform. I have experience with UI/UX design, rapid prototyping, APIs, Backend development, Database design, and more. APIs I've integrated: Stripe OpenAI Plaid SendGrid Salesforce Algolia Checkr Firebase HubSpot ActiveCampaign Transitioning from no code to code? As a backend software engineer by profession, I can also help your company transition from a no code app infrastructure to a working, scalable codebase. Contact me now to chat about your project and we can start creating your product roadmap, feature prioritization, and game-plan to get your idea created.

Java
Product Management
UX & UI
Stripe
No-Code Development
Bubble.io
Database Architecture
Web Design
Web Development
HTML5
API Integration
Web Application
Python
JavaScript
Responsive Design
$150 hourly
Jarrett L.
- 5.0/5
- (35 jobs)
As a software engineer, CTO, and technical writer, I've written thousands of lines of code, advised on dozens of software projects, and authored over a half dozen books on computer science. I have expertise in mainstream programming languages including Python, CSS, C++, HTML, Java, and JavaScript. I'm well versed in both theoretical areas of computer science as well as cutting edge technological innovations. I have strong project management experience and a powerful understanding of the IT industry. One particular speciality of mine is Artificial Intelligence (AI); where I have deep knowledge of machine learning, data science, and statistics. Another speciality is Hardware/Electrical Engineering; where I have extensively researched circuitry, chip design, and manufacturing processes. Recently, I have also advised on top quality DevOps projects; where I have built a strong portfolio around technologies such as Docker and Kubernetes. Please feel free to reach out and message me at any time! I look forward to hearing from you!

Java
Education
Content Writing
JavaScript
Tech & IT
Instruction Manual
Elearning
English
Docker
SQL
TensorFlow
Python
SciPy
$100 hourly
Igor N.
- 5.0/5
- (12 jobs)
Ex-Googler | Senior Software Engineer | Business Process & AI Automation Specialist I specialize in transforming manual, time-intensive tasks into streamlined, automated workflows. As an Ex-Googler with 7+ years of industry experience, I’ve helped businesses scale, cut costs, and accelerate digital transformation by leveraging cutting-edge technologies—ranging from ETL pipelines and Robotic Process Automation (RPA) to OpenAI-powered machine learning solutions. Featured in TheVerge & Inc. Magazine for pioneering AI innovations and automation strategies. Core Expertise & Use Cases • Business Process Automation (BPA): End-to-end process design, workflow orchestration, and system integration. • AI Agents: Agent Development Kit (ADK), CrewAI, LangChain, Autogen. • ETL Pipelines & Data Integration: Building robust pipelines for extracting, transforming, and loading data across multiple platforms. • AI & Machine Learning: Implementing and fine-tuning models (e.g., OpenAI GPT, embeddings) for natural language understanding, predictive analytics, and intelligent automation. • Computer Vision & Document Processing: Automated image/video/document recognition, OCR, and data extraction (OpenCV, Tesseract). • Audio Processing & Speech-to-Text: Integrating speech recognition for customer service, transcription, and data analysis. • RPA & Workflow Automation: Designing bots and scripts for repetitive tasks using UiPath, Automation Anywhere, and Microsoft Power Automate. • Data Scraping & Web Crawling: Utilizing Python (Scrapy, Beautiful Soup), Puppeteer, or Selenium to gather high-value insights from web sources. • Big Data Handling: Parsing and manipulating large datasets (CSV, JSON, Excel) using Pandas, NumPy, and serverless solutions on AWS or GCP. • Document Generation & Management: Creating dynamic reports and templates, automating routine documentation processes. • Digital Transformation & Integration: Connecting modern solutions with ERP, CRM, and legacy systems to ensure seamless data flow and optimized operations. Technologies & Tools • Languages: Python, JavaScript, Node.js, C# • AI/ML: OpenAI (GPT-3/4, embeddings), TensorFlow, PyTorch, scikit-learn • Computer Vision: OpenCV, Tesseract, custom OCR frameworks • Data Scraping Frameworks: Scrapy, Beautiful Soup, Selenium, Puppeteer • Cloud & Serverless: AWS (Lambda, Step Functions), Google Cloud Platform (Cloud Functions, Workflows), Azure Logic Apps • Databases & ETL: MySQL, PostgreSQL, MongoDB, Apache Airflow, Talend • RPA Platforms: UiPath, Automation Anywhere, Blue Prism, Power Automate • No-Code/Low-Code: Zapier, Make (Integromat), Bubble, Appian • Project Management: Agile, Scrum, Jira, GitHub Selected Achievements 1. Intelligent Document Processing: Reduced manual invoice entry by 80% through an OCR-based document capture and data validation system. 2. E-commerce Automation: Decreased order processing times by 30% and minimized errors using RPA for inventory management and customer notifications. 3. OpenAI-Powered Chatbot: Built a multilingual customer support bot using GPT fine-tuning and embeddings, boosting user satisfaction and engagement. 4. Enterprise ETL Pipeline: Designed and deployed a scalable ETL pipeline handling millions of records, enabling real-time analytics and reporting. 5. AI-Driven Video Analytics: Developed a computer vision solution for real-time object detection in video feeds, enhancing security and event monitoring. Why Work With Me? • Proven Track Record: Solutions featured in over 100 media outlets globally, recognized for driving efficiency and innovation. • Holistic Approach: From initial process mapping and data extraction to machine learning model deployment and system integration. • Scalable Solutions: Focus on building modular, future-proof workflows that adapt as your business evolves. • Clear Communication & Collaboration: I prioritize transparency, timely updates, and continuous improvement throughout every project. Ready to supercharge your business processes with intelligent automation, ETL pipelines, and AI-driven insights? Let’s discuss how I can help optimize your workflows, reduce operational costs, and unlock new growth opportunities. Feel free to reach out to start the conversation!

Java
RESTful API
Microsoft Excel
Mobile App Development
Android App Development
Gemini
OpenAI API
Web Development
Business Process Automation
Automated Workflow
AI Agent Development
Zapier
API Integration
Automation
Machine Learning
Scripts & Utilities
Artificial Intelligence
Web Application
JavaScript
Amazon Web Services
$85 hourly
Michael R. K.
- 5.0/5
- (9 jobs)
✅ I'LL LEVERAGE MY DECADES OF EXPERIENCE AS A FULL-STACK WEB DEVELOPER / SYSTEMS ARCHITECT / TECH LEAD WITH TOP COMPANIES to get your project done correctly and cost effectively – with excellent communication throughout the entire lifecycle of the project. ✅ DEVELOPED FOR WORLD-FAMOUS COMPANIES / ORGANIZATIONS JPMorgan • March of Dimes • MultiView • Cartier • SEI • Festo • Many more... ✅ EXPERT-VETTED BY UPWORK The Upwork Expert-Vetted program identifies the top 1% of talent on the platform. All Expert-Vetted freelancers undergo a rigorous screening process. ✅ 5-STAR RATING ⭐⭐⭐⭐⭐ 100% satisfaction rating from all of my Upwork clients. ✅ YALE-EDUCATED COMPUTER SCIENTIST I hold a B.Sc. in Computer Science from Yale University and an M.Sc. in Marine Biology. ✅ EXCELLENT COMMUNICATOR Top clients prefer to work with someone with whom they can have clear and concise communication throughout the entire lifecycle of the project. I have a proven record in communicating with individuals and groups, both technical and non-technical stakeholders. ✅ YOUR PROJECT WILL GET DONE THE RIGHT WAY! See full profile below to find out more... • Expert Full Stack Developer / Systems Architect / Tech Manager • Over 15 Years Experience • .NET • JavaScript • PHP • API Integration • E-Commerce • CMS (Content Management Systems) • Wordpress Optimization • AI / ChatGPT Integration • More ... -------------------------- Dear Potential Client, Would you like to get your project done the right way: quickly, cost effectively and correctly – the first time around? I am a Senior Developer / Systems Architect with over 15 years of experience in development, architecture and managerial roles. A Yale-educated Computer Scientist with a strong background in Mathematics, for many years I held the position of Senior Architect & Developer at the March of Dimes, an internationally known (and historically significant) non-profit organization based in the New York City area. In addition to my technical skills, I am also known for my outstanding communication skills. Top clients often choose to work with me because they are looking for someone on whom they can rely to have clear and concise communication throughout the entire lifecycle of the project, and on whom they can depend to interact effectively with technical and non-technical stakeholders alike. I offer free consultations for all potential clients. Feel free to message me to set up a meeting. Wishing you great success, Michael R. Klosner, Senior Developer & Systems Architect –––––––––––––––––––––––––––––––––––- Highlighted technological experience: ➠ .NET Framework / .NET Core ➠ JavaScript (JS) Full Stack, including Node.js, React.js, Express.js, etc. ➠ Artificial Intelligence (AI), Machine Learning (ML), AI Chatbot (ChatGPT API) integration ➠ Apache Lucene / SOLR, Full-Text Search ➠ Matlab, R (Statistics) / RStudio ➠ SQL (SQL Server, MySQL), NoSQL (MongoDB) ➠ Entity Framework ➠ Angular, TypeScript, jQuery ➠ eCommerce integration: Amazon Payments, PayPal, Shopify, Stripe ➠ XML, XSLT, JSON, AJAX, RESTful APIs ➠ C#, C++, C ➠ Java / Spring, PHP ➠ Python ➠ HTML 5 / CSS 3 ➠ Content Management Systems (CMS) ➠ OpenText CMS / OpenText Delivery Server ➠ Wordpress & Website Page Optimization ➠ SDLC (Jira, Git, Azure DevOps) –––––––––––––––––––––––––––––––––––- Communications skills include: ➠ Explaining highly technical issues to non-technical individuals and groups in a straightforward and engaging manner. ➠ Justifying budgets and timelines from a technical point of view. ➠ Managing developers as well as non-technical staff, serving as technical team lead. ➠ Composing and presenting technical policy papers, roadmaps and white papers. ➠ Representing companies (virtually or in person) at shareholder meetings, symposiums, technology expos and other gatherings. –––––––––––––––––––––––––––––––––––- Work philosophy: I approach each project as if it were a work of art. From initial exploration of the problem, to design of its solution, to execution and testing, my philosophy is that everything should fit together as a well thought-out, structured, and — dare I say — beautiful, whole. If you're looking for a seasoned technologist who has worked in a vast variety of technologies, who assimilates new technologies quickly and easily, and who approaches problems and their solutions in a structured, well thought-out manner, resulting in maintainable and scalable long-term solutions, then I just might be the right person for you. –––––––––––––––––––––––––––––––––––- And, just to help you get a better sense of who I am on a personal level, here are some of my hobbies: ➠ Skydiving (I hold a USPA C license and have completed approximately 500 jumps) ➠ Aviation (FAA Private Pilot’s License granted in January, 2017) ➠ Sea Kayaking ➠ Hiking the Appalachian Trail ➠ Motorcycling ➠ Marine Biology (M.Sc. in Marine Biology) ➠ Studying and Teaching Ancient Languages

Java
React
Angular
Azure DevOps
Cloud Computing
PHP
Node.js
ChatGPT API
Auth0
SQL
Ecommerce
API Integration
JavaScript
.NET Framework
.NET Core
$60 hourly
Kevin W.
- 5.0/5
- (11 jobs)
I'm a software engineer with experience in building websites both on the front end and back end. I am also experienced in data science and data engineering, specifically with. Python & Apache Airflow and Prefect focus. I graduated with a BS in Computer Science from Case Western Reserve University in Cleveland, OH in 2017, and have around 7 years of professional experience at health tech startups and fintech companies like Capital One. I've worked on many projects building out software applications for companies, from application development to building out ETL pipelines using Airflow for data transfer to the cloud. I'm proficient in most backend technologies like Java, C#, and Python, as well as frontend frameworks like Angular and React. I'm also proficient at building cloud applications using AWS.

Java
Chinese
English
C++
JavaScript
Database
React
HTML
Amazon Web Services
API
API Development
Data Science
Python
$60 hourly
Mark B.
- 5.0/5
- (1 job)
Hello, I am a versatile developer with experience in websites for any kind of business and/or artists who need to make their statement on the web. I have been creating websites for years starting as an intern but now I create tons of websites for clients with a tremendous amount of great feedback. I love making unique sites for my clients and pushing limits to create the best project for me and my client.

Java
Shopify
PHP Script
Microsoft Word
Android
App Development
Computer Skills
Blender
CSS
C#
PHP
WordPress
HTML
JavaScript
Custom PHP
$35 hourly
Yevhenii F.
- 5.0/5
- (1 job)
I'm a Salesforce Developer with experience in building CRM Applications. Created dynamic web applications with Lightning Web Components(LWC) and Apex in an Agile environment. I have more than 2 years of experience in Apex, VisualForce and Lightning and also knowledge and experience in Sales Cloud and Service Cloud. Have Salesforce Admin and Platform Developer 1 certificates.

Java
Salesforce
Agile Software Development
Amazon Web Services
Agile Project Management
Salesforce App Development
Visualforce
Salesforce Lightning
SOQL
Apex
Python
JavaScript
SQL
CSS
HTML
$35 hourly
Alexander M.
- 5.0/5
- (3 jobs)
*15+ years' experience in liaising with constituents, customers, vendors, and the public. *15+ years' experience in teamwork and collaboration. *15+ years' experience in event planning, coordination, and execution. *7+ years' experience in web client services. *Advanced ability to learn quickly and apply new technologies and concepts. *Advanced written and oral communication skills.

Java
Mailchimp
Administrative Support
Data Analysis
Ecommerce
Analytics
Problem Solving
Documentation
Office 365
CSS
HTML
Google Analytics
WordPress
Public Speaking
Microsoft Excel
$35 hourly
Leo B.
- 4.8/5
- (5 jobs)
I taught myself how to code when I was 14 years old. I’m a self-starter and I love taking on new challenges to strengthen my problem-solving, research, coding, and app development skills. I've built several web and mobile apps from scratch using ReactJS, React Native, JavaScript and Python. I'd love to work with you and help you with your project!

Java
Computer Science
Simulation Software
GitHub
Python
JavaScript
HTML
Docker
CSS
$110 hourly
Kamolesh B.
- 5.0/5
- (1 job)
As a Sr. QA Automation Lead, I have over 15 years of experience in ensuring the quality and performance of software applications in various industries, especially in financial services. I am passionate about applying my technical skills and domain knowledge to deliver high-quality solutions that meet the business needs and expectations of our clients and stakeholders. I have extensive experience in planning, developing, and executing quality assurance jobs for various projects using Java, Selenium, SpecFlow, HTTP, MVC, and other tools and frameworks. I have a good understanding of SDLC and STLC, and I am proficient in various testing techniques, such as black box testing, negative testing, functional testing, integration testing, and user acceptance testing. I also have strong communication and collaboration skills, and I enjoy working with cross-functional teams to ensure the quality and reliability of our software products. * Expert in Developing a complete customized robotic automation framework for UI, API, Database, Mobile, and Analytics application. * Expert in Java code design, coding, testing, and debugging techniques. * Expert in Web Test Automation, using Selenium Webdriver, and Selenium Grid. * Expert in Mobile APP Test Automation, using Selenium Webdriver, and Appium.

Java
Business Card Design
JDBC
Git
CI/CD
TestNG
Software Testing
API
API Development
RESTful API
Software QA
Selenium
Jenkins
GitLab
Appium
$35 hourly
Ghaffar M.
- 4.6/5
- (5 jobs)
Ready to elevate your projects to new heights? Look no further! I'm a versatile Full Stack developer with expertise in native mobile apps, cross-platform development, server-side technologies, APIs, and more. Here's what I bring to the table: 📱 Mobile Mastery: ☆ Native mobile apps ✓ Android, ✓ iOS, ☆ Cross-platform development ✓ Ionic, ✓ Phonegap, ✓ Angular, ✓ Flutter ⛓️ Blockchain Brilliance: ✓ Crypto exchanges, ✓ Blockchain development 🚀 AI-Powered Innovation: ✓ Alexa skills, ✓ Artificial Intelligence ☆ Tools: ✓ Xcode, ✓ Metal, ✓ UIKit, ✓ NSFoundation, ✓ AVFoundation, ✓ CoreText, ✓ OpenGL ES, ✓ GLSL 🌐 Industries I've Conquered: ☆ Marketplaces (Similar to Uber in the fitness and beauty industry) ☆ Real Estate ☆ Social Mobile and Web startups ☆ Cannabis startups ☆ E-commerce (Shopify, WooCommerce) ☆ News/Media and Law ☆ Learning Management Systems 7 reasons to hire me for your next web project: ✓ Honest, accountable, always accessible Monday - Saturday. ✓ 10 years+ experience in design and development. ✓ Positive outlook - I love to help others succeed! ✓ Fluent in English - Project communication via Upwork or email. ✓ 100% client satisfaction, guaranteed! ✓ Mobile-Friendly Design - It’s a mobile world; think mobile-first. ✓ Always stick to the agreed project deadlines. Let's collaborate and take your projects to new heights! Get in touch today to discuss how I can bring your ideas to life and deliver exceptional results.

Java
GIS
Mapbox
JetPack
iOS Development
Flutter
Swift
Kotlin
iOS
Android
Native App Development
Mobile App Development
MySQL
MongoDB
PostgreSQL
$160 hourly
Alejandro R.
- 5.0/5
- (3 jobs)
Web developer with real-life expertise creating and maintaining large-scale systems. Mostly experienced in backend development with Ruby on Rails and Golang, but able to work through the whole full stack, from frontend, backend, database design and implementation, to deployment. Experienced with Site Reliability Engineering for distributed systems.

Java
Google Cloud Platform
HTML
JavaScript
PostgreSQL
CSS
Git
Ruby
Golang
Ansible
Ruby on Rails
$40 hourly
Evan C.
- 5.0/5
- (1 job)
* Composer and writer with exceptional creative and communication abilities * International recognition as a skilled musician has allowed me to work in multiple countries with a diverse and multidisciplinary set of collaborators * High level of analytical ability allows me to quickly and concisely express complex ideas in both writing and speech * Highly adaptive worker with a keen ability to quickly assimilate and apply new information and skills from various disciplines

Java
Technical SEO
Customer Service
C#
Copywriting
Music
Microsoft Office
Search Engine Optimization
Unity
Writing
Retail Merchandising
Ad Copy
HTML
Music Theory
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