Hire the Top 2% of
Freelance Java OOP Developers

priyansh N.

Vetted Java OOP developer in Germany (UTC+2)

Architect with experience of 8+ years in Frontend +Backend+big data I Have worked across various domains in my career did freelancing as well as worked for top product based companies I have expertise in payment, Ecommerce, Banking domain as well as i have knowledge of building enterprise web application and Windows , Linux native applications which can scale at high level I am java certified professional and I am having below mentioned certificates • Java Certified- Oracle certified java developer • Web component certified -Oracle Certified Web Component developer • Certified Spring boot and Aws architect. My experience is vastly distributed across technologies, such as: • Backend Solutions System Designing ,Complex application designs ,Data structure and algorithm,Architecturing Test Driven development,Team management,Windows native application,Web Applications • Tools and Tech: Language: Java ,Golang, Kotlin , Python ,Typescript,Javascript,Ruby Data base: Cassandra, Mongo-Db,Postgresql,CouchBase,MySql,Oracle,Sql and Plsql Caching: Redis,MemCache, Framework: Hibernate,Spring Jpa, Spring boot,React-Go,Dynamo-Db,Spring-Cloud,Spring-Mvc CI/CD: Jenkins, Aws-Codecommit, BitBucket, AzureDevops, Continuous Delivery Cloud: Aws and Azure Messaging-Queue: Kafka,Aws-msk,Azure-EventHub Architecture: Microservices,EventDriven,Monolithic,Windows native application Have knowledge of concurrency and event driven systems . • Front End Technologies JavaScript, jQuery, Angular 2, Typescript,React ,Es6,npm,web pack, grunt • Hadoop Ecosystems Spark, scala, hdfs ,Mapreduce,Hadoop,scoop,hive,

Alexey P.

Vetted Java OOP developer in France (UTC+2)

As a solution-driven software development consultant, I thrive on challenges and approach each project with a curious and unbiased mindset. My vast generalist experience allows me to provide tailored solutions that address my clients' unique needs and goals, and my commitment to communication and collaboration ensures that each project is completed efficiently and effectively.

AbuBakar S.

Vetted Java OOP developer in Pakistan (UTC+5)

I am a Senior Mobile App Developer with experience in Android and iOS development. I have worked on various projects, led development teams, and possess a strong skill set in Kotlin, Java, Swift, and more.

Pedro M.

Vetted Java OOP developer in Portugal (UTC+1)

Computer Vision Engineer with 2 years of industry experience backed by 3 years of Academic Research experience. Top performer, and team player working in a small company with a focus on bringing state-of-the-art and recently published methods to production. My strengths include edge and mobile deployment and optimization of Deep Learning Models and customization of PyTorch models.

Rodrigo C.

Vetted Java OOP developer in Brazil (UTC-3)

• I have a deep knowledge and experience in designing very independent, modular and decoupled structures for programs and libraries, making use of asynchronous programming when appropriate, allowing for wide and deep test coverage, and a high degree of design and implementation reuse. • I also have knowledge in data modeling, specially relational database models. • I am mostly comfortable working with Object Oriented and Generic Programming techniques; and C++ technology to develop libraries and programs. • I can also work as a technical coordinator of software development teams. • I would be glad to train and mentor developers. • I have been using several tools along the years: C/C++, SQL, SQLite, Unified Modeling Language - UML, Standard Template Library – STL, Linux, BOOST, QtEditor, Emacs, GNU debugger - gdb, GNU Chain Compiler – gcc, GNU Make, Doxygen, Subversion, ASN.1, asn1c, Linux Shell Script - bash, Smart Card APDU (ISO 7816-4, 7816-8 e 7816-9), MUSCLE API, openssl, FLTK, MS Visual Studio, pthread, Delphi, SQL-Server, Visual Basic, ERWIN, Java

Gabriel F.

Vetted Java OOP developer in Ecuador (UTC-5)

I am a Software Engineer with ten years of experience in Mobile development. I have extensive knowledge in Android and iOS and I have experience with programming languages such as Objective-C, Swift, Java, and Kotlin. In addition, I am always looking to learn new technologies and expand my skill set, which led me to acquire proficiency in React Native, Xamarin, Unity3D, and Flutter using languages such as C#, JavaScript, TypeScript and Dart. I am detail-oriented and have the ability to self-manage my time efficiently to achieve project goals. I also have experience working in multicultural and distributed teams around the world and I am fluent in both English and Spanish for effective communication. When I am not working, I enjoy spending time with my family and engaging in outdoor activities such as walking, running, and traveling. I also love watching movies and keeping up with the latest technology trends. iOS | Android | React Native | Xamarin | Unity3D | Swift | SwiftUI | Objective-C | Kotlin | Java | C# | JavaScript | TypeScript | React | Firebase| AWS | Git | Git Flow | CI/CD | Scrum | Kanban | JSON | XML | API Rest | BDD | TDD | DDD | CLEAN | VIPPER | VIP | MVC | MVVM | Augmented Reality | Virtual Reality | ARCore | ARKit | OpenGL | OpenCV

Israel R.

Vetted Java OOP developer in Mexico (UTC-6)

I am writing to offer my credentials for consideration for the open Software Engineer opportunity within your organization. My professional background offers a demonstrated ability to excel in software application development roles, with experience that includes iOS, Android, web application, and internal system projects. The contributions I have made to the success of companies that include IBM, American Electric Power, BDP Franchise Solutions, and Televisa (main Mexican multimedia mass media company) serve as solid evidence of the contributions that I would bring to your company in this position. I am seeking opportunities to contribute to a world-class organization, working remotely from Mexico. Recognized for communication, collaboration and broad technical skills, I have excelled in positions requiring strategic planning, expertise in applications development, and high-level analytical ability. I have benefited my employers with a strong sense of discipline, a professional dedication to excellence, and a willingness to go above and beyond’ to ensure success. I am attaching a resume to provide you with further details of my experience for your evaluation. Experienced extended in different programming languages and Linux; I love it! Reinforced my experience in databases, websites, web services in every project. On my last project we worked with Python, ReactJS, PHP, Java, C, Assembler, REST API’s, Jira, Git, TDD, Pair programming, Unit testing, Functional testing, agile/scrum; All the new technologies/methodologies that are using right now. The combination of expertise, education, and practical experience I possess will be of immediate benefit to your organization. I am available for either a telephone conversation or an in-person interview at your earliest convenience, and welcome the opportunity to learn more about your company and this position. I look forward to your response and our first meeting.

Freddie M.

Vetted Java OOP developer in Colombia (UTC-5)

Hi I'm a Senior Software Engineer with more than 12 years of professional experience, more experienced with Java, Spring, Angular, Golang, Postgresql, React, AWS.

David A.

Vetted Java OOP developer in Colombia (UTC-5)

Software Engineer with 9+ years of experience designing and building High-throughput, Low-latency, Scalable and Fault Tolerant systems. ● Strong problem-solving skills and ability to grasp new concepts quickly. Proficient in both theoretical and applied aspects of data structures, algorithms, and software design principles such as SoC, LoD, SOLID, DRY, KISS, YAGNI, among others. ● Advanced knowledge of distributed systems, microservices, monolithic applications, cloud infrastructures, CI/CD, and many tools used to implement, test, maintain, and observe/monitor the built systems (traces, logs, metrics, and alerting). ● Hands-on experience setting up CI/CD pipelines using Jenkins and Bitbucket Pipelines: PR validation (required build before merge), automatic deployment to _staging_ environment after merge, and automatic or one-click deployment to _production_ environment. ● Successfully designed and developed an anti-fraud biometric authentication system, combining fingerprint scanning with face recognition/comparison using AWS Rekognition, contributing significantly to a financial company's security. ● Hands-on experience in implementing both B2C and B2B IAM solutions using third-party services like AWS Cognito and Auth0. Additionally, I have developed CIAM (Customer Identity and Access Management) flows from the ground up, incorporating JWT, MFA (OTP sent utilizing Twilio for SMS), RBAC, API Key, API ID, and more. ● In-depth knowledge of Java and various JVM technologies and frameworks, especially Spring (Spring Boot, Spring Data, Spring Web, Spring Batch, etc.), enabling robust and scalable application development. ● Profound understanding of the entire Software Development Life Cycle (SDLC) and extensive experience with diverse agile methodologies. Have taken ownership of projects, adhering to the "you build it, you run it" philosophy. Additionally, I have been actively involved in training and mentoring junior/mid-level developers in select projects. ● Proficient in working with both SQL databases (MySQL, PostgreSQL, Oracle, etc.) and NoSQL databases (MongoDB, DynamoDB, Redis, ElasticSearch, etc.), ensuring data management versatility. ● Experienced in multiple programming languages, including Python, Golang, Scala, JavaScript, TypeScript, VBA, and UNIX shell scripting, allowing adaptability across various project requirements.

Saloni A.

Vetted Java OOP developer in India (UTC+6)

I am a Senior Web3 Engineer at Chingari, contributing to building their NFT marketplace and auction features. I am highly skilled Blockchain and Backend Developer with extensive experience in building and managing applications and marketplaces. As a Senior Web3 Engineer at Chingari, I had played a pivotal role in developing their NFT marketplace contract in Aptos(move) chain and auction features for the Solana blockchain, and has integrated services like Livepeer and Filecoin etc. At Aura, I led backend development for a gaming-focused NFT marketplace, architecting the product from scratch and implementing innovative features like an NFT Indexer and crypto/fiat swap payments. My technical expertise spans Node.js, Typescript, Nest.js, Aptos(move), Rust, various blockchain technologies, and both SQL and NoSQL databases, underpinned by a strong foundation in Java from her tenure at Oracle. I have the ability to drive complex projects to completion and lead development teams effectively.