Hire the best Java Developers in Minnesota

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$50 hourly
Solomon W.
- 5.0/5
- (112 jobs)
Self motivated mobile app developer that has built multiple mobile apps from the ground up. I learned what users care the most is how the mobile app looks and feels (UI/UX). Through my experience of over 6 years building out my own mobile app ideas below and building my clients apps, I've gained massive amounts of knowledge on how to create beautiful looking mobile apps that look and run great. I was able to get my personal app project SongMakr to over 200 downloads a day through ASO (App Store Optimization) in the app store with users creating songs everyday. SaveMe Receipt App - iOS - This app allows users to store their receipts and get notifications when their receipt expires. - Used Firebase for authentication, database, and file storage. RentRoom iOS App - This app allows tenants the ability to pay their rent and contact their landlord regarding any maintenance issues. - Used Firebase for authentication, database, and file storage. Meip Music iOS App and Android App - This mobile app allows the user to record their voice over music and the app mixes it to create a song. The user can post the song to their profile or share it over Facebook, twitter, etc. You also could like other people’s songs and follow and message them a song. - The app used Parse for the backend to save user accounts and their songs. I used Swift programming language for the iOS version and Java for the Android version. SongMakr iOS App - With the shut down of parse i decided to remove my Meip app and build SongMakr. - The app uses Google Firebase. MapChat iOS App - This mobile app allows you to post anonymously at your location on a map. Other users can look at posts in their area. - Also used Google Firebase InstaPics iOS App - To get more practice with Firebase i built an instagram clone called InstaPics. - You can create an account and post pictures with filters and also you post to the feed. - Open sourced it on Github so other people can use it. Skills: - Mobile App Development - iOS App Development (Swift, SwiftUI, Objective C, Xcode) - Android App Development (Java, Android Studio) - Firebase - Realm - Core Data - MapKit - Google Maps Here are some reviews from previous clients: "Solomon Woldegebriel is a top notch mobile app developer. When starting a new technology- focused business, some of the things you need most from your mobile app developer are timely communication, sufficient skills, and the ability to interpret non-developer language. Solomon excels in all three areas. He made me comfortable along the development process of my app by staying in constant communication with me and replying in a timely manner. Solomon let me know of any issues as they came up, which allowed me to stay on top of my business planning. I would not have been able to successfully launch my company without Solomon's abilities. I highly recommend him to work in any capacity!" - Upwork Client "Solomon is a great guy to work with. Goes above and beyond and even out of his own way to find better solutions and implements it. It is a pleasure to work with him again and going forward he will be our go to person for all iOS projects." - Upwork Client Message me now if your looking for an expert mobile app developer to get started on your project!

Java
SwiftUI
iPhone & iPad Apps
iOS SDK
Android SDK
Apple Xcode
Android Studio
iOS
Firebase
Swift
Android
Mobile App Development
iOS Development
$70 hourly
Joseph M.
- 5.0/5
- (9 jobs)
I'm a web developer with 6 years of professional experience and a decade more of self-guided entrepreneurship. I'm up for any job, big or small - from landing pages to modern web applications. - I'm experienced in both back-end and front-end development - I love graphic design, color theory, and layout design - I focus on what's important: Smart coding, organic user experience, responsive design Contact me about your project and let's do a little dreaming together!

Java
Web Development
C#
Hugo
JavaScript
CSS
Front-End Development
Next.js
Tailwind CSS
TypeScript
React
HTML
WordPress
Web Application
MongoDB
Graphic Design
$50 hourly
Lane E.
- 5.0/5
- (1 job)
I am a recent college graduate looking for my next opportunity to learn in this industry. I have experience working full-stack, web, and video game development with a proficient knowledge of Java, Python, C/C++, and JavaScript. Additionally, I am familiar with Object-Oriented Programming (OOP) and its design principles, Waterfall and Agile engineering methodologies, and database development. In my free time I enjoy practicing my creativity through cooking, reading and writing, drawing, and indie video game development. I have a wide variety of interests and love to learn, so I love software development for allowing me to express my creativity logically and gain experience learning many different processes.

Java
Microsoft Windows
JavaScript
Database Development
Object-Oriented Programming
MySQL Programming
Database Programming
Linux
Computer Science
Database Management
Game UI/UX Design
Python
C#
Python Script
Database
C++
MySQL
$40 hourly
Lukas H.
- 5.0/5
- (4 jobs)
Lukas is a software engineer with 4 years of experience doing both frontend and backend development for various tech companies based in the U.S. Lukas has experience building frontend applications using React, Vue.js, JavaScript, CSS/SCSS, HTML5, Redux, Jest, jQuery, and D3.js. He also has experience working with Node.js, Flask, Django, Java, Spring, Flask, Rust, Python, SQL, NoSQL databases, etc. Lukas also has experience working with the Cloud, having hands on experience with many AWS technologies such as S3, DynamoDB, SQS, EC2, Lambda, Route53, EMR, ELB, Networking and more.

Java
Amazon S3
PySpark
AWS Lambda
Amazon EC2
Vue.js
jQuery
SQL
C++
Django
Node.js
React
Python
JavaScript
$45 hourly
Kidus H.
- 5.0/5
- (1 job)
I am a dedicated bioinformatician and a graduate student researcher at the University of Minnesota, specializing in the analysis of single-cell multi-omic data. My expertise lies in leveraging Python, R, and SQL to extract meaningful insights from complex biological datasets. Through my academic and research experience, I’ve developed a strong foundation in data analysis, problem-solving, and computational biology, consistently contributing to innovative projects in the field.

Java
Research Methods
Problem Solving
C++
Communication Skills
Machine Learning
Linux
PyTorch
SQL
Statistical Analysis
Python
R
$60 hourly
Tommaso B.
- 5.0/5
- (1 job)
I currently work as a software development engineer at Amazon and I do freelance work in my spare time. - Python, C/C++, TypeScript React, Java/Kotlin - Frontend and backend experience - Mobile Development (both iOS and Android) - Cloud experience with AWS

Java
AWS CloudFormation
React
Linux
C
API Development
Git
SQL
Amazon DynamoDB
AWS Lambda
Golang
Kotlin
TypeScript
C++
Python
$75 hourly
Brooke R.
- 5.0/5
- (1 job)
I am a AI software engineer with 7 years of professional experience specializing in architecting and developing complex engineering systems. Whether you are trying to bring your idea to life or have an ongoing project you are looking for a motivated individual to take on, I can help. Software/Database Development: Languages and Software | C/C++, Java, Javascript, OOP, SQL, Python, QlikSense, Oracle, Access, Eclipse, Jupyter Notebook, Visio, GitHub, AWS PaaS & IaaS (Lambdas, SNS, SQS, API Gateway, Step Functions, Cloudwatch) Website Development: Languages and Software | HTTP, HTML5, PHP, CSS, XHTML, React, Primefaces, WordPress, Squarespace, SEO

Java
AWS Development
SQL
Python
Quality Assurance
$75 hourly
Nathan D.
- 5.0/5
- (21 jobs)
I am a multi-disciplined programmer with over 10 years industry experience. I am an expert at multi-paradigm programming (functional, object-oriented, and logic paradigms), and use the paradigm that is most appropriate for the problem. I study programming languages as a hobby. I am pretty much language agnostic — I don't care too much what language I use, or even if I know it prior to the project — but I do prefer languages that are conducive to a multi-paradigm approach, such as Clojure, Scala, Python, etc. I enjoy learning new things, and am constantly honing my skills. I seek software development jobs that will both exercise the skills I already have, as well as help me develop new skills.

Java
RESTful API
ClojureScript
.NET Framework
HTML
Clojure
SQL
CSS
Python
JavaScript
$125 hourly
Yasin J.
- 5.0/5
- (19 jobs)
Overview Are you struggling to implement secure and seamless Single Sign-On (SSO) solutions for your business? I’m here to help! With over a decade of experience as a Senior Software Engineer, I specialize in Identity and Access Management (IAM) systems, leveraging Keycloak, SAML, OAuth, and OpenID Connect (OIDC) to simplify authentication processes and protect your organization’s critical data. What I Offer: • Custom Keycloak configurations, including theming, user federation, and event listeners. • SSO integrations across multiple platforms, including WordPress, AWS, and enterprise SaaS solutions. • Expertise in OAuth 2.0 and SAML 2.0, ensuring robust and scalable authentication for your applications. • Development of secure REST APIs and microservices using Java and Spring Boot. • Migration of legacy systems to modern authentication frameworks. • Troubleshooting and optimization of existing IAM setups. Industries I’ve Worked With: • Healthcare • E-commerce • Education • Small and Medium Businesses (SMBs) • Technology Startups My Approach: I believe in crafting solutions tailored to your business needs. Whether you need to onboard 3,000+ users or integrate SSO for multiple third-party apps, I focus on scalability, security, and efficiency. My goal is to deliver solutions that save you time, reduce operational costs, and enhance user experience. Client Success Stories: • Designed and architected a global SSO system for an international nonprofit operating in over 100 countries. Using Keycloak, I implemented a solution that unified their IAM strategy, enabling secure access to their suite of applications for thousands of employees and volunteers worldwide. • Enabled a B2B SaaS platform to streamline authentication for business clients by integrating Keycloak with their existing systems. This included custom configurations and OAuth-based authentication, reducing login errors and improving customer satisfaction. • Customized Keycloak theming for a design-focused platform, creating a seamless and branded user authentication experience. Delivered a visually appealing, responsive, and secure login interface tailored to the client’s design needs. Why Choose Me? • 12+ years of software development experience with a strong focus on IAM and SSO. • Successfully completed 10+ Upwork projects with a 5-star rating (except one at 4.85). • Proven expertise in deploying secure IAM solutions that meet compliance standards. • Clear communication, fast delivery, and attention to detail. Let’s Work Together If you’re ready to secure your applications, streamline user authentication, or implement a robust IAM strategy, I’m here to make it happen. Let’s discuss your project today and turn your challenges into solutions!

Java
Single Sign-On
User Authentication
Active Directory Federation Services
Web Application Security
User Identity Management
Core Java
Security Assertion Markup Language
OAuth
OKTA
React
Node.js
$40 hourly
Chris S.
- 5.0/5
- (3 jobs)
I have experience developing software in Python, Java, Javascript, HTML/CSS and C. I've worked with many APIs including eBay and Spotify. I'm open and willing to learn whatever is necessary to accomplish my client's goals. I look forward to working with you!

Java
pandas
eBay API
Web Scraping
Spotify
HTML
JavaScript
Python
$50 hourly
Lauren T.
- 4.6/5
- (2 jobs)
I'm a creative web developer with 10+ yeas of experience, highly skilled in CSS, SASS, JavaScript, React, PHP, Git, WordPress, and Drupal. My approach goes beyond standard development; I love "thinking outside the box" to deliver exceptional websites and applications that are truly unique to each client. I've successfully delivered impactful solutions for diverse clients, including non-profits, small and large businesses, and personal and informative websites, always aiming to present their identity to the world in the most effective way.

Java
Web Accessibility
React
Front-End Development
MySQL
Spring Boot
HTML5
WordPress
CSS
JavaScript
$15 hourly
Sandhya S.
- 5.0/5
- (1 job)
With a progressive background in software development spanning 5 years, I bring hands-on experience in several big data technologies including Apache Spark, Spark Streaming, Apache Kafka, and Apache Mesos. Additionally, I possess extensive knowledge in setting up and maintaining Elasticsearch clusters and Kibana. My development expertise includes proficiency in Java/J2EE, JSP, C#, Hibernate, and Spring, as well as Java/J2EE, Wicket 1.4, Spring, Hibernate 3.0, and Postgresql. Moreover, I possess a strong command over various databases, including Postgresql, SQL Server, MongoDB, HBase, Amazon Redshift, and MaxmindDB. Further, I possess hands-on experience in AWS cloud services such as AWS S3 and AWS EC2 console. My technical prowess extends to front-end web technologies, including ReactJS, HTML, CSS, and JavaScript. Overall, I am a competent software developer with a wide range of technical skills and a proven track record of delivering projects successfully. With my expertise in big data technologies, software development, databases, AWS cloud services, and front-end web technologies, I can develop robust and scalable applications that meet business requirements effectively. My knowledge of these technologies allows me to handle complex data processing tasks and ensure seamless integration of different systems.

Java
React
Amazon S3
Amazon EC2
Amazon Redshift
Cloud Computing
Elasticsearch
Apache Spark
$45 hourly
Ahmed M.
- 0.0/5
- (2 jobs)
I'm a seasoned Software Engineering Leader with proven experience building scalable web applications for enterprise and startup environments. As a technical co-founder and engineering leader, I specialize in taking products from conception to launch using modern tech stacks. Core Expertise: Full-Stack Development: Next.js, React, Node.js, PostgreSQL, TypeScript Cloud & DevOps: Docker, Azure, CI/CD pipelines, microservices architecture SaaS Product Development: MVP launches, scalable architectures, Stripe integration Recent Achievements: ✓ Led containerization of 14 microservices using Docker, improving scalability and reducing costs ✓ Developed enterprise HR platform used by 50%+ of Walmart's workforce (100,000+ users) ✓ Co-founded and architected a SaaS platform using Next.js 14, Prisma, and PostgreSQL ✓ Successfully launched MVPs for both startup and enterprise environments What Sets Me Apart: Technical Leadership: Experience managing engineering teams and coordinating with stakeholders Full Project Lifecycle: From requirement gathering to production deployment Modern Stack Expertise: Particularly strong with Next.js, React, and cloud infrastructure Business Acumen: MBA in IT Management, combining technical expertise with business strategy I excel in: → Building MVPs and scaling SaaS applications → Implementing secure, scalable cloud architectures → Leading technical teams and managing project deliverables → Developing full-stack solutions with modern technologies Available for: * SaaS product development * Full-stack web application projects * Technical architecture consulting * MVP development and scaling Let's discuss how I can help bring your project to life with scalable, modern solutions.

Java
JavaScript
CSS
HTML
React
Redux
CI/CD
Node.js
Agile Software Development
Full-Stack Development
Python
SQL
TypeScript
GraphQL
$41 hourly
Carter W.
- 0.0/5
- (1 job)
Hi, I'm Carter 👋 I've delivered six figure industrial automation projects for 7 8 & 9 figure companies. Quick Hits: 1. Increased industrial system output efficiency by 10% saving thousands.. 2. Launched mobile application on the Google Play Store with Flutterflow. 3.Developing comprehensive automation systems that reduced manual data entry by 85%. I specialize in creating powerful business automation solutions that save companies thousands of hours and eliminate manual processes. By combining my engineering background with automation expertise, I help businesses streamline their operations through intelligent workflow design. My technical toolkit includes: Make.com (advanced workflows and custom integration development) FlutterFlow (mobile app development and automation integration) Ignition SCADA (HMI design and industrial automation) API integration and custom webhook development Open AI's Chat GPT along with other LLM models. I'm passionate about helping businesses identify automation opportunities and implementing solutions that drive real ROI. Whether you need to streamline your sales processes, automate customer onboarding, or connect disparate systems, I can help transform your workflow vision into reality. Let's discuss how automation can revolutionize your business operations!

Java
HTML
SQL Programming
Dart
Firebase
Flutter
FlutterFlow
Zapier
Make.com
$55 hourly
Steven L.
- 5.0/5
- (2 jobs)
I specialize in dropping into a project and helping push it to finish. I can also do new projects. Mostly, I just want to understand the problem and help you get where you want to go. My main focus has been in Java/Spring, JavaScript front-end (various frameworks), and database development. I am comfortable in both on-premises and cloud deployments. If you are stuck with a tough Java or JavaScript bug, I can help you get past it. If you need someone to mentor your more junior people on a topic, I can do that. If you need someone to teach or make a presentation on a topic new to your team, I can do that. Over the years I've worked in the financial, healthcare, broadcasting, and high-tech industries. People enjoy working with me, as I try to empathize with their situation and understand their situation from the inside out. I do my best to make sure the customer is satisfied. Please get in touch and I will help you get where you want to go!

Java
OpenShift
React
Spring Security
Spring Boot
Spring Batch
JavaScript
$16 hourly
Cheng T.
- 5.0/5
- (1 job)
As of writing this, I'm currently in my third year of going for a bachelors in computer science. - I know java and python - fast and willing learner - eager to take in new experiences

Java
Computer Science
Python
$8 hourly
Jaylen S.
- 4.9/5
- (3 jobs)
I'm a developer/ designer just starting out. I have recently left the service, and am looking for some great experience to help me with my journey. I have always loved coding, and problem solving since I was a child, learning how to code on an old Windows XP. • Experience in, java, html, unity, react, c#, and C++ • I was a CNA for a while during COVID, so I do have some experience in the medical field as well. My communication line is always available, and I am always open for feedback.

Java
Project Management
Unreal Engine
Unity
C++
C#
React
HTML
$40 hourly
Benjamin W.
- 0.0/5
- (0 jobs)
I'm a confident and driven software engineer, currently advancing my knowledge through personal ventures, internships, and coursework at the University of St. Thomas. I love thinking out-of-the-box when brainstorming solutions to challenging problems, and I strive to be an effective communicator and persistent problem solver with every project I work on. Let's connect to discuss how my strengths and skills could benefit your team!

Java
Documentation
Communication Skills
Information Security
TypeScript
JavaScript
Scripting
Artificial Intelligence
Git
Unit Testing
Mathematics
Python
Software Development
Web Design
Web Development
$90 hourly
Thomas M.
- 4.2/5
- (2 jobs)
I'm a graphics developer with experience in developing desktop, mobile, and web applications. I am self-driven with excellent time management, and experienced with collaborating both in-person and remotely. * Knows C++, Python, Java, OpenGL * Knows HTML, CSS, JavaScript, React/Vue, Bootstrap/Foundation, Node.js * Experienced in Git and CI * Proven success in remote work environments

Java
Multithreaded, Parallel, & Distributed Programming Language
Three.js
WebGL
OpenGL
NoSQL Database
SQL
Node.js
React
Vue.js
CSS
HTML
JavaScript
Python
C++
$200 hourly
Jay P.
- 0.0/5
- (0 jobs)
Java and awesome. Can build anything with nothing. All technologies. 5x developer 500x with ai tools

Java
$35 hourly
Craig W.
- 0.0/5
- (0 jobs)
TRUEXTEND, Inc. is a California-based company that specializes in extending the software development and software engineering capabilities of any business throughout North America. We increase the intellectual production of our clients by providing them the best human resources through the Nearshore model. Headquartered in Silicon Valley, TRUEXTEND runs Nearshore R&D centers in Latin America to provide cost effective solutions to our clients.

Java
Business Analysis
Quality Assurance
Node.js
React Native
React
Angular
Swift
Xamarin
Android
iOS
Ruby
Oracle
ASP.NET
.NET Stack
$120 hourly
David G.
- 0.0/5
- (0 jobs)
Title: Backend & AI DevOps Engineer | Python, Java, C#, Azure/AWS | Scalable Systems & Automation Overview: I design and deliver secure, high-performance backend systems and DevOps infrastructure for AI-powered platforms, enterprise apps, and real-time services. With 10+ years of experience and deep expertise in Java, C#, and cloud platforms like Azure and AWS, I specialize in building systems that scale reliably—whether you're launching an MVP or modernizing critical architecture. I’ve led projects that process millions of data points, deploy ML models safely into production, and replace fragile pipelines with automated, testable workflows. My toolset includes Terraform, Docker, Kubernetes, GitHub Actions, Jenkins, and Azure DevOps, with a strong focus on observability, compliance, and performance. What I bring to your team: - Backend APIs & services in Java (Spring Boot), C# (.NET Core) - Cloud-native infrastructure on Azure (Bicep, ARM, Functions) and AWS (Lambda, ECS, CloudFormation) - End-to-end CI/CD pipelines, IaC, and automated deployments - Secure, cost-optimized DevOps for AI/ML workloads and multi-tenant platforms - Strong documentation, code hygiene, and team mentorship I’ve worked across fintech, healthtech, SaaS, and government, and thrive in high-stakes environments where reliability and performance matter. Let’s talk if you need a backend or DevOps expert who thinks long-term, communicates clearly, and delivers fast, production-grade results.

Java
Data Analysis
Microsoft Azure
Amazon Web Services
Git
CI/CD
Docker
Azure DevOps
ML Automation
AI Development
AI App Development
AI Platform
Django
C#
Python
$75 hourly
Chaz L.
- 0.0/5
- (0 jobs)
I’m a developer experienced in a wide variety of things, but mostly Python with a web-based component. If you want something built for the web or automated, I can help. If you need something explained, I'm very good at that. I really enjoy refactoring and improving performance. Knows Python, Flask, Docker, Java Experienced trainer and love helping people solve problems and learn along the way.

Java
Software Testing
Deployment Automation
Bootstrap
React
Ansible
Docker Compose
Docker
Spring Boot
Flask
Python
Web Application
Web Development
$80 hourly
Ronald N.
- 0.0/5
- (0 jobs)
⭐Have extensive experience in software engineering, cloud environments, DevOps, databases, QA automation testing, the CI/CD process, and team management. ⭐Value individuals and interactions over processes and tools, emphasizing clear communication, professionalism, and attention to detail. ⭐Focus on delivering value to customers and improving business efficiency while fostering quality, best practices, and engineering excellence. ⭐ I design and develop clean, efficient, and maintainable code to enable the end-to-end delivery of high-quality software solutions. ✅Java (Spring Boot, Javalin, JPA) ✅Python (Flask, SQLAlchemy) ✅JavaScript (Axios, Knockout.js) ✅Groovy ✅Bash ✅Vue.js (Bootstrap Vue) ✅AWS (EC2, IAM, S3, Route53) ✅OpenStack ✅Container technologies (Docker, Docker Compose, Podman) ✅Kubernetes ✅Infrastructure as code (IaC) (Ansible, Terraform) ✅SQL ✅Oracle database setup ✅PL/SQL ✅Jenkins ✅GitHub ✅Selenium ✅Postman ✅Jira ✅PCI Compliance ✅GDPR Compliance ✅Medical Device and Commerce industries

Java
Oracle PLSQL
OpenStack
AWS Development
Kubernetes
Docker
Ansible
Infrastructure as Code
DevOps
Automated Testing
QA Automation
Vue.js
Python
Spring Boot
REST API
$95 hourly
Andrew V.
- 0.0/5
- (0 jobs)
PROFILE Versatile, well-rounded, security conscious, and successful software engineer who is educated and grounded firmly in formal computer science and software engineering fundamentals, with 10+ years of enterprise level software development experience using a multitude of technologies in many different environments, public and private. Direct quotes about me from recent performance review(s) "Andrew accomplishes a great deal and produces high quality work. He consistently meets or beats deadlines. Andrew organizes his work very well, even though he is responsible for a number of different products and projects." "Andrew conducts himself in a very professional manner. He is respectful of others' opinions and styles. He has an impressive ability to work with all people. " "Andrew's communication skills are excellent, in writing, speaking, and listening. He is able to adapt his message to his audience. Andrew works very well with both technical and business staff and easily

Java
Cloud Architecture
.NET Core
C#
Web Application
Script
Desktop Application
$100 hourly
Igor K.
- 0.0/5
- (0 jobs)
Solution-oriented professional. Strong object-oriented thinking with passion for bleeding edge technologies. Self-motivated, proactive, flexible person with great analytical skills, excellent communicator and team-player.

Java
Cucumber
Problem Solving
JavaScript
Agile Software Development
SOAP API
REST API
SQL
CSS
HTML
Jenkins
JUnit
Selenium
Python
$130 hourly
Nick D.
- 0.0/5
- (0 jobs)
Experienced Software Engineer with a proven track record in the aerospace and medical device industries, as well as in mobile app development and business solutions. I specialize in creating robust, scalable software systems—whether for regulated environments or commercial applications. I bring a unique blend of deep technical expertise and business acumen, working with clients across various sectors including IoT, fintech, and marketing. My background includes R&D, Design Controls, and system-level integration, with a focus on interfacing with external systems and applying strong software architecture principles. Key Skills & Technologies: Languages: C, C++, Java, Kotlin, Swift, SwiftUI, Objective-C, Python Mobile Development: Android & iOS native apps, Cross platform Kotlin Multiplatform Systems Development: Embedded firmware for regulated industries Tools & Frameworks: Gradle, Git, design patterns, software partitions Industry Experience: Medical devices (FDA-regulated), Aerospace, IoT, Banking, Marketing Tech Whether you're looking to build a mobile app from the ground up, improve system architecture, or need a technically sound developer for a regulated project, I can help translate your vision into a functional, maintainable solution.

Java
Agile Software Development
Git
CI/CD
SwiftUI
Swift
C++
C
Embedded C
Kotlin
Mobile App Development
iOS Development
Android App Development
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