Best Java Jobs & Projects

We are seeking a skilled developer to complete the Offline Raid Protection mod for Palworld. The project is in its initial stages, and you will be working from a base design that has already been established. Your expertise in game modding and familiarity with Palworld is essential to enhance and finalize this mod. If you are passionate about game development and have experience creating mods, we would love to see your application!

Skills: C++, Java, PHP, C#, Windows Server

We are seeking a skilled developer to create an optimizer for solving a vehicle routing problem. The ideal candidate will have experience in operations research and algorithm development, with a strong understanding of routing optimization techniques. You will collaborate with our team to ensure the solution meets our specific requirements and is scalable for future needs. A solid background in programming languages such as Python nd familiarity with relevant libraries like Google OR tools and Gurobi solver is essential. If you are passionate about tackling real-world problems through optimization, we want to hear from you!

Skills: Python, JavaScript, Java, Mathematical Optimization, PHP

I am using production tracking in excel and now looking to convert into power app. Is that possible do let me know.

Skills: HTML5, JSON, Microsoft Excel, Microsoft Power BI, C#, ASP.NET MVC, Automation, Microsoft PowerApps, Core Java, Microsoft Dynamics 365, ASP.NET Web API, Office 365, Microsoft SharePoint, Microsoft Power Automate Administration, Microsoft Power Automate

I have an online video game, which has a websocket from the Cloudflare CDN, my problem is that Cloudflare has a timeout of 100 seconds which causes disconnections from the game emulator, my server is a dedicated OVH gaming server with Debian, I am looking for how to manage that websocket in a way that we can avoid that timeout from another location, or somehow improve it or do something so that these disconnections do not occur.

Skills: Java, Linux, Nginx, Ubuntu, Debian

We need a person who is familiar with Chinese language and APIs to contact Aliexpress and ask them about the status of our access token for Aliexpress API. We are having trouble with their limit of queries per minute and we would really need to somehow increase the limit. We would need the person to contact the aliexpress team and ask them for information.

Skills: WordPress, PHP, Chinese, API, Data Entry, Java, Python, Virtual Assistance

I am looking a highly skilled Senior Software Engineer with extensive experience in Java, Spring, and microservices architecture. The ideal candidate should have a proven track record of developing complex systems and should be located in South America, Central America, or Europe. You will work on challenging projects that require innovative solutions and a deep understanding of software engineering principles. If you are a proactive problem solver who thrives in a collaborative environment, we want to hear from you!

Skills: Java, Microservice, API, RESTful API, Spring Framework, Software Architecture & Design, Docker, Apache Kafka, Apache Maven, CI/CD

We are looking for a talented Bubble.io expert with experience in low-code development to design, build, and maintain scalable, user-friendly applications. The ideal candidate has a strong understanding of Bubble’s development framework, excellent UI/UX design skills, and the ability to integrate complex workflows and APIs.

Skills: Java, Web Development, Bubble.io, CMS Development, WordPress, Webflow, MERN Stack, Figma, Figma to Webflow Plugin, FlutterFlow, AWS Lambda, Azure App Service, AI Bot, ChatGPT API Integration, AWS Development

I am in need of an expert Android Developer to upgrade my existing utility tool app. The source codes are readily available. The project primarily involves adding new features to the app.

Key tasks include:
- Modifying the current source codes to incorporate new features
- Ensuring the upgraded app meets the latest Android standards

Ideal candidates would be those with extensive experience in Android development, particularly with utility tools. A strong portfolio showcasing previous app upgrades and feature additions would be highly advantageous.

Skills: PHP, Java, Mobile App Development, Android, C# Programming

We are seeking an experienced developer to resolve a specific error encountered during local setup in IntelliJ. The error is related to Liquibase and indicates a failure to add a foreign key constraint due to a missing unique key in the referenced table. The ideal candidate will have a strong understanding of Liquibase, database design, and IntelliJ configuration. If you have experience troubleshooting similar database issues, please apply with your relevant experience.

Skills: SQL, Java, Spring Boot

I'm on the lookout for an experienced AI developer with a focus on Computer Vision. The project will primarily involve processing images, so a deep understanding and experience in handling image data is crucial.

Key Responsibilities:
- Develop an AI system capable of image classification and image segmentation.

Ideal Skills:
- Proficient in AI and machine learning, specifically in the domain of computer vision.
- Hands-on experience with image processing and computer vision tasks.
- Familiarity with developing AI for image classification and segmentation.
- Proficient in using relevant programming languages and tools (Python, TensorFlow, etc.).
- Develop, test, and maintain Python-based applications.
- Collaborate with cross-functional teams to design and implement new features.
- Optimize and refactor code to improve performance and scalability.
- Troubleshoot and debug complex issues, providing efficient solutions.
- Participate in code reviews and ensure adherence to best practi
- Develop a secure login system. You can choose between JWT and OAuth based on your expertise.
- Create a mobile-friendly query input interface.
- Integrate various retrieval systems like FAISS, Pinecone, or ElasticSearch.
- Use LLMs (e.g., GPT-3, GPT-4) for generating answers.
- Implement the app using a framework of your choice, such as Flutter or React Native.
- Proficiency in mobile development, particularly with Flutter and React Native. Knowledge in Kotlin and Swift is a plus.
- Strong backend development skills in Python, preferably using FastAPI or Flask. Experience with LLM APIs like OpenAI and Hugging Face is crucial.
- Competence in database management (PostgreSQL, MongoD? and search & retrieval systems (FAISS, Pinecone, ElasticSearch).
- Experience in deploying applications on cloud platforms (AWS, GCP, Azure).
- Understanding of security protocols, particularly JWT and OAuth.
- Familiarity with containerization tools like Docker and Kubernetes.
- Knowledge of cloud deployment processes.

This project is ideal for a mobile developer who is not only proficient in cross-platform app development but also has a strong background in backend development and cloud deployment. Your expertise will enable us to create a secure, user-friendly, and AI-powered mobile application.

Please bid if you have the relevant experience and skills

Skills: PHP, C Programming, Java, Python, Software Architecture

We are seeking a skilled JavaScript developer to thoroughly test our code interpreter functions. The ideal candidate will have a strong understanding of JavaScript and experience with testing methodologies. Your role will involve identifying bugs, suggesting improvements, and ensuring the code performs optimally. If you enjoy working in a dynamic environment and have a keen eye for detail, we would love to hear from you!

Skills: JavaScript, HTML, CSS, Java, Web Development

I require an expert in Java or Python to develop a utility capable of mapping fields from XML to JSON. The utility will specifically handle metadata information, so understanding and processing this type of data is crucial.

Key processing requirements include:
- Handling authoring and development attribute details
- Mapping contributor names and roles
- Identifying and processing attributes
- Tracking code versions

Ideal candidates for this project should have:
- Extensive experience in Java/Python
- Strong understanding of XML and JSON
- Previous experience with similar utility development
- Able to handle complex metadata processing.

Skills: Java, XML, Python, Software Architecture, JSON

I'm in need of a Client Onboarding application which incorporates eKYC and eSigning functionalities. The APIs for both eKYC and eSigning are in the final stages of approval and will be made available.

Key Aspects:
- The frontend of the application is to be developed using ReactJS, while the backend will utilize JAVA Springboot.
- The application will generate PDF documents on the backend using JAVA libraries. These documents will be readonly and unencrypted.
- The design for the frontend will follow Bootstrap.
- The eKYC provider's API to be integrated is Aadhaar eKYC (APIs are available and tested).
- The application will support three user roles: Admin, Client, and Agent.

Ideal Skills:
- Proficiency in ReactJS and JAVA Springboot is essential.
- Previous experience with eKYC and eSigning integration is highly regarded. (APIs are available and tested)
- Competency in creating and managing PDF documents using JAVA libraries is a plus.
- Familiarity with Bootstrap for frontend design.

Looking forward to your proposals.

Skills: Java, JavaScript, J2EE, React.js, Tailwind CSS

Hi,
I'm looking for someone who speaks Arabic and knows their way around Java to help my students understand coding better. If you’re good at Java and can explain tricky topics in Arabic, I'd like to let you join my team. All content and materials will be given from my side, and you’ll be doing one-on-one sessions, clearing up any confusion, and sharing some best practices in Java. If teaching is your thing and you’ve got a solid Java background, I'd love to chat with you!

Skills: Java, Arabic

Will be explained in detail later.
Beasically it is about adding features to our connector.

Skills: CMS Development, Adobe Experience Manager, CMS Framework, Web Development, Webflow, Java, CSS, HTML, React, Cloud Architecture, Web Design, UX & UI, Figma, Adobe Target, Adobe Analytics

Description:
We are seeking an experienced professional to design and develop a crypto trading algorithm focused on Bitcoin dominance trends and altcoin trading. The ideal candidate will have expertise in quantitative analysis, algorithm development, and/or AI for financial markets.

Responsibilities:
Quantitative Analysis:
Analyze historical Bitcoin dominance and altcoin performance data.
Identify patterns and correlations to design profitable trading strategies.
Algorithm Development:
Develop and implement trading algorithms for real-time execution.
Integrate APIs from exchanges like Binance or Kraken for trade automation.
AI/ML Integration:
Apply machine learning techniques for market forecasting and trend prediction.
Optimize the algorithm for risk management and profitability.
Backtesting:
Test strategies using historical data to ensure reliability.
Fine-tune the model based on backtest results.

Requirements:
Strong programming skills in Python, C++, or Java.
Experience with trading libraries like ccxt, pandas-ta, or TA-Lib.
Proficiency in machine learning frameworks (TensorFlow, PyTorch).
Deep understanding of cryptocurrency markets, Bitcoin dominance, and altcoin cycles.
Familiarity with APIs for crypto exchanges (e.g., Binance, Coinbase Pro).
Ability to work independently and meet project deadlines.
Preferred Skills:

Experience in statistical modeling and time-series analysis.
Knowledge of DeFi protocols and on-chain data analytics.
Previous work on trading bots or financial algorithms.
Project Scope:

Phase 1 (1–2 months): Develop and backtest the algorithm.
Phase 2 (2–3 months): Deploy and optimize for real-world trading.
Potential for long-term collaboration based on project success.

Skills: Python, Artificial Intelligence, C++, Java, ccxt, pandas-ta, TA-Lib

I'm in need of a Spring Boot specialist to assist me with migrating a small web application project from Spring Boot 1.5 to version 2.7. This project involves a professional collaboration, hence I can't share the code directly. We will be migrating the project together.

Key Project Details:
- The web application makes use of several components including Security, Data access (JPA/Hibernate), and REST API.
- It is built using Spring Boot and Java.
- There are several custom configurations and libraries in use, which adds to the complexity of the migration.

Ideal Candidate:
- Extensive experience with Spring Boot, particularly versions 1.5 and 2.7.
- Strong understanding of web application development.
- Proficiency in Java, JPA/Hibernate, and REST API.
- Previous experience working with custom configurations and libraries.
- Excellent communication skills for effective collaboration.
NB: We will be migrating the project together.

Skills: Java, JSP, Software Architecture, Spring Boot, Spring Security

Hello! My name is Shelby.

I need assistance with publishing my app to console.
I want to upload and update the app, so I need a developer with his own console account.

Best regards, Shelby W.

Skills: Android, Smartphone, Android App Development, Mobile App Development, Tablet, Java, Kotlin, Mobile App

I'm seeking a dedicated Clojure Developer to help maintain and enhance our health application. The primary responsibilities will involve development, with a focus on improving the user interface, backend functionalities, and integration with third-party services.

Key Responsibilities:
- Collaborate with the team to enhance the health application
- Improve the user interface, backend functionalities, and third-party integrations
- Utilize Clojure to implement necessary updates and modifications

Ideal Candidate:
- 3+ years of proven experience with React Native development
- Strong proficiency in JavaScript and the React ecosystem
- Expertise with Redux for state management
- Familiarity with native APIs and third-party integrations
- Knowledge of performance optimization techniques for mobile apps
- Experience with automated testing in React Native
- Proficient in Clojure

Your skills in Clojure and React Native will be pivotal in driving the continued success of our application. If you're a passionate developer with a knack for creating seamless, high-performing mobile applications, we want to hear from you.

Skills: Java, JavaScript, Mobile App Development, CSS, Clojure

Project Description:

We are seeking a skilled Android developer with experience in native library integration to implement and stabilize a speech codec library (similar to AMBE) within an Android application. We have obtained the necessary .so libraries (arm64-v8a and armeabi-v7a) and have a reference implementation from a GitHub project (https://github.com/OK-DMR/ambe-codec-p25/tree/beon). However, the current implementation suffers from intermittent segmentation faults, leading to application crashes. The goal of this project is to create a robust and stable implementation of this codec within our Android application. This codec needs to support multiple concurrent encoding/decoding operations.

The Task:

Library Integration: Integrate the provided .so libraries (arm64-v8a and armeabi-v7a) into our Android application project.
Debugging and Stabilization: Identify and resolve the root cause of the segmentation faults. The crashes are intermittent, occurring at varying times and frequencies, and are device-dependent. This requires strong debugging skills and experience with native code debugging in Android.
Concurrent Operation Support: Ensure the implementation correctly supports multiple concurrent encoding/decoding operations, as required by our application.
Testing and Validation: Thoroughly test the implementation on various Android devices and under different usage scenarios to ensure stability.

Technical Requirements:

Strong experience with Android development and the Android NDK (Native Development Kit).
Proficiency in C/C++ programming.
Expertise in debugging native code (C/C++) on Android, including using debugging tools like gdb or lldb.
Experience with multi-threading and concurrency in C/C++.
Familiarity with JNI (Java Native Interface).

Additional Information:

We can provide sample voice frames for testing purposes.
The codec needs to support multiple concurrent encoding/decoding operations.
The crashes manifest as segmentation faults and are intermittent and device-dependent.

Deliverables:

A fully integrated and stable implementation of the speech codec library within our Android application.
A report detailing the cause of the segmentation faults and the steps taken to resolve them.
A set of tests demonstrating the stability and functionality of the implemented codec.

Skills: C, C++, Reverse Engineering, App Development, Android, ARM Microcontroller, JNI , Java, Android App Development, Mobile App Development

As a client, I am in search of a Senior Backend Developer with extensive experience in crafting web applications. This project will leverage various programming languages and database technologies.

Key Skills Required:
- Proficient in Java and Python
- Mastery in Node.js, Ruby on Rails, C#, PHP/Laravel is a plus
- Extensive experience with MySQL, MongoDB, and PostgreSQL

Ideal candidates should have a proven track record of developing web applications. They should possess excellent problem-solving skills, be detail-oriented, and able to work independently. Strong communication skills are essential for effective collaboration. Please include examples of your previous work in your bid.

Skills: Java, JavaScript, Python, NoSQL Couch & Mongo, Node.js

I'm seeking a Python developer experienced with M5Stick C Plus 2 programming and the Telegram Bot API. The project involves creating a solution that records audio from the built-in mic, encodes it into MP3 format, and sends voice messages over WiFi via Telegram.

Key Requirements:
- Program the M5Stick C Plus 2 to record audio and send it through a Telegram bot.
- Use the built-in microphone.
- Implement MP3 encoding of the audio.
- The Telegram bot should be able to send the recorded messages.
- Deliverables should include the source code, comprehensive setup instructions, and optional support for testing.

Ideal candidates should have:
- Proven experience in Python programming.
- Familiarity with M5Stick C Plus 2 and its capabilities.
- Prior work with the Telegram Bot API.
- Ability to deliver quality code and clear instructions.

Skills: C Programming, Java, Python, Software Architecture, C++ Programming

Job Proposal
We are looking for an experienced Android developer to integrate a Unity avatar into our app.

Responsibilities
Seamlessly integrate the existing Unity Avatar into the Android application.
Update dependencies and ensure compatibility with the latest Android versions and devices.
Collaborate with the team to ensure the avatar functions smoothly and optimally in the app.
Requirements
Minimum of 3+ years of experience in Android app development.
Strong proficiency in Java or Kotlin programming languages.
Prior experience with Unity integration into Android apps is a plus.
Familiarity with dependency management tools like Gradle.
Knowledge of optimizing performance for Unity content on Android.
Preferred Skills
Experience with Unity Engine.
Debugging and troubleshooting Android apps with Unity components.

I have attached document to inegration.

Skills: Android, Unity

Description:
Our team is seeking an experienced Android developer with expertise in Huawei Mobile Services (HMS) to assist us in integrating the following features into our existing Android Studio app:
Banner Ads
Rewarded Video Ads
In-App Purchases (IAP)

Requirements:
Experience with Huawei Mobile Services (HMS) Ads Kit and In-App Purchases.
Proven track record of successfully integrating HMS services into Android Studio projects.
Ability to deliver clean, efficient, and well-documented code.
Strong communication skills and willingness to collaborate with our team.

Deliverables:
Fully integrated and functioning Banner Ads, Rewarded Video Ads, and In-App Purchases within our app.
Step-by-step documentation of the integration process, so our team can maintain and update the implementation as needed.
Assistance with debugging and testing the features on Huawei devices to ensure compatibility.

Budget: $150

Timeline: We need the project completed within 1 week.

Additional Information:
Our team is available to provide the existing project code and assist in testing. The app is built in Android Studio with Java.

Skills: In-App Advertising, Java, Android App Development

Design, develop, and execute manual functional tests, and convert these into automated tests.

Collaborate with development and QA teams to identify and prioritize test cases for automation.

Develop, maintain, and execute automated test scripts using industry-standard tools and programming languages.

Perform functional testing and apply automation methodologies across middleware components.

Validate backend systems on platforms like HANA, IBM DB2 (including mainframe), Oracle, and SQL Server.

Conduct performance testing using tools such as Load Runner, LoadUI NG, or Visual Studio.

Execute and analyze results for services/API testing using tools like SOAP UI and Postman.

Ensure thorough backend validation, including SQL, stored procedures, and ad-hoc query development.

Utilize Continuous Integration tools such as Bamboo, Urban Code Deploy, and Bit Bucket for testing and version control.

Collaborate with cross-functional teams to ensure testing coverage aligns with business requirements.

Skills: Automation Testing, Java, Python, SOAP UI, Postman, REST API, HL7, FHIR, Selenium, RIT, IBM Message Queues, IIB,, Load Runner, LoadUI NG, Visual Studio, HANA, IBM DB2, Oracle, SQL Server, SQL, Stored Procedures, Ad-hoc Query Development, Relational Databases, Bamboo, Urban Code Deploy, Bit Bucket, Continuous Integration.

I seek an experienced AI professional to provide comprehensive training sessions on AI and programming AI.

I know programming languages like C, C++, Java, GIT, SQL, and PLSQL. I also know Scrum/Agile.

I am an absolute beginner in AI.

I need to understand my basic concepts of AI and want to learn AI application development.

Skills: Machine Learning, Artificial Intelligence, Data Science, LangChain, Generative AI, Neural Network

hello

recently i have developed a android application and it is a free app tools apps my app no contains any ads or in app purchase it is ready and tested free app so need to publish my application on console. am looking a freelancer for my app who can launch perfectly application on play stor.

if anyone can do upload please come to message box i will discuss

thanks

Skills: Android App Development, Mobile App Development, Smartphone, Java, Android, App Development

We are seeking an experienced professional to diagnose and resolve performance issues with our on-premise Rocket.Chat deployment. Our system is currently experiencing high CPU usage and occasional freezes, which disrupts our team's communication. The ideal candidate will have a strong background in server management and familiarity with Rocket.Chat configurations. Your expertise will help us restore optimal performance and ensure a seamless chat experience for our users. Please provide examples of similar work you've completed in the past.

Skills: JavaScript, Amazon Web Services, PHP, MySQL, Java

I'm looking for a skilled Java developer to fix bugs in my existing web application, specifically server-side errors. The ideal freelancer should have:

- Proficiency in Java and experience with web applications
- Strong debugging skills
- Familiarity with server-side development.

The job can be done entirely via remote sharing session.

Skills: Java, JavaScript, Software Architecture

Job Description:
I am planning to host a Lichess.org-like website targeting an Indian audience. I am looking for a DevOps and VPS expert who can handle the end-to-end setup, deployment, and CI/CD pipeline configuration.

Project Scope & Responsibilities:
Repository Management:

Duplicate the parent repo from Lichess GitHub Repository to Azure Repos.
Ensure proper branching strategy and version control is followed.
CI/CD Pipeline Setup:

Configure Azure DevOps Pipelines for automated builds and deployments.
Ensure continuous integration and deployment (CI/CD) workflows are properly implemented.
Handle build scripts and dependency management for smooth deployment.
VPS Configuration & Hosting Setup:

Configure a VPS (Virtual Private Server) for hosting Lila Chess.
Preferred hosting environment: Docker or Kubernetes.
Set up server security, firewall, monitoring, and backups.
Optimize performance for low-latency gaming experience.
Deployment & Testing:

Deploy the application to the VPS and ensure smooth operation.
Conduct performance testing and load balancing for scalability.
Provide documentation for future reference.
Preferred Skills & Experience:
Azure DevOps expertise (Repos & CI/CD Pipelines).
Strong experience with VPS management (preferably in India).
Docker & Kubernetes knowledge for containerized deployments.
Linux server administration & security best practices.
Experience with Java-based applications (Lichess is built on Scala).
Good understanding of databases & caching (Lila Chess uses Redis and MySQL).
Familiarity with Lichess.org architecture is a plus.
Deliverables:
Fully functional CI/CD pipeline in Azure DevOps.
Configured VPS with the required environment.
Deployed & running Lila Chess instance.
Performance-tested & optimized deployment.
Step-by-step documentation for future maintenance.
? Budget: Open for discussion based on experience.
⏳ Timeline: ASAP – Preferably within a few weeks.

If you have experience in DevOps, Azure, Docker, VPS management, and CI/CD, please apply with your relevant experience and previous projects.

Skills: System Admin, Cloud Computing, Scala, Ubuntu, DevOps