Hire the best Java Developers in Oakland, CA
Check out Java Developers in Oakland, CA with the skills you need for your next job.
- $195 hourly
- 5.0/5
- (24 jobs)
Hi! I'm James, a Harvard Computer Science graduate, an ex-Googler, and CTO-level fullstack software engineer. I have 21 years of work experience, and can meet in-person if you’re in or near silicon valley. I believe that brilliance is good; reliability is better; and most important are integrity and compassion.. I help awesome people doing amazing things in the world; and I will deliver you delightful tech and tech leadership, on time, on budget, with full transparency and candor. I provide the following services: - Fractional CTO: I will work with you to clarify your visionary goals into an actionable technical roadmap; help you secure funding if necessary; and then run the technical operation start to finish. - Web and native app development: From napkin-sketch ideation to 7+ figure production, I will deliver intuitive, elegant digital experiences to your customers, from top-rated games and 3D virtual worlds to FDA compliant medical software, on the web and on devices. - Solving “unsolvable” tech problems. Examples of real projects I was engaged for: building a low power “hurricane proof” weather camera (Weather Channel); assisting with the development of the Semantic Reactor (a Google/Alphabet internal project); building a physical neural network entirely out of glass. - Technical project management: I will ensure your project runs on time and on budget, with incremental milestones and mitigated risks, using the best of Agile and PM tooling. I can manage teams large and small. - Productionalizing Research. Give me the research paper or the patent, I’ll make it real and scalable. - Consulting, with lawyers and attorneys, as a software engineering resource, for instance with respect to contracts and other legal matters (like Privacy Policies or GDPR/CCPA concerns). - Modernization of old technology: I will migrate and modernize your legacy application using the industry’s latest best practices. I have experience with performance tuning, scalability, devops, security hardening, penetration testing, and much more. - Teaching and coaching: I teach middle and high schoolers competitive coding. I enjoy tapping into every student’s life story and motivations. I also advise entrepreneurs and can act as a sounding board for personal and professional goals. - Solutions Architect: I provide comparative analysis of modern cloud technologies and explanations of how to use them for different scenarios. For example, I delivered a research paper to a private equity firm comparing Kafka, Kinesis, and other message queue technologies. The following are some of the technologies I have experience with: • Languages: Javascript/Typescript (ES6, ES7), C and C++, Java, Kotlin, Scala, Python, C#, Go / Golang, Rust • Analytics and Automation: make.com, Zapier, Twillio, Vercel, Airtable, Tableaux, Salesforce • Web: HTML5/CSS /SCSS/SASS/CSS-in-JS, React, Angular, WASM, 3js / three.js, Svelte, Astro, Vue.js, Qwik, Next.js, internationalization/i18n, localization l10n, accessibility/a11y • AI: PyTorch, TensorFlow, ChatGPT, GPT3 and GPT4, GAN (generative adversarial networks), Transformers, LSTM, RNN, belief networks / HMM • Mobile: ios (Swift and Objective-C), Android (Kotlin, Java) and DEX / Dalvik debugging, Google Play, App Store, React Native, expo • Geospatial: S3, H2, KD-tree, quadtree, ArcGIS, choropleths, NLP (including slack and discord chat bots) • MVP and Project Management: Figma, Trello, Jira, Agile, Scrum, Kanban • Testing and QA: JUnit, Jest, Mocha, Chai, Selenium, Puppeteer, Playwright, Cypress • Backend: NodeJS, Express, Django, flask, Tomcat, Spring, RabbitMQ • Infrastructure and DevOps: Docker, Kubernetes/k8s. GitHub Actions, CircleCI, Jenkins, Vercel, Netlify, Gatsby, Drone, Vagrant, Chef, Ansible, Terraform • Auth and InfoSec: auth0, oauth2, pentest, ISO 27001, GDPR, CCPA • Cloud tech: AWS, Azure, GCP, EC2, S3, Lambda, Kafka, Kinesis, AppSync, Spark, Storm, DataFlow, Hadoop • Databases: MySQL, Postgres, Firebase, Mongo, DynamoDB, Redis, NoSQL • Games / 3D: Unity, Unreal, OpenGL, webgl, photogrammetry, Meshlab, Blender, OpenCV • Embedded Tech: IoT, Raspberry Pi, Arduino, • Code Management: Github, Gitlab, Gerrit, Git, Svn • DevOps and Command Line: Bash, ZSH, Linux, PowerShell, Make, ImageMagick, FFMpeg, cron, GNU core tools
Java
PyTorchNodeJS FrameworkTensorFlowArtificial IntelligenceReact NativeUnityApache KafkaRaspberry PiScalaPythonJavaScriptAndroidBash ProgrammingEnterprise Architecture - $80 hourly
- 5.0/5
- (12 jobs)
As a passionate software developer based in California, I've always been drawn to the dynamic world of web and software development. My journey has led me to specialize in both coding and managing websites with WordPress, significantly expanding my portfolio. I thrive in environments that challenge my adaptability and problem-solving skills, whether working solo or collaborating with teams. I take pride in my ability to dive into complex projects, guiding them from conception to launch. My technical background is diverse, spanning the creation of large-scale applications designed for client interaction to implementing cutting-edge, open-source technologies that push the boundaries of innovation. Currently, I am focused on deepening my knowledge and skills in web development, data visualization, and game/engine development to enhance my visibility in the industry. My toolset includes Java, J2EE, Spring Technologies, and I'm equally proficient in frontend and backend development with technologies like PHP, Node.js, and modern frameworks such as React, Vue.js, and Angular. Effective communication is key to my workflow, ensuring clear and productive interactions with both technical and non-technical colleagues. I am naturally inquisitive and quick to adapt, always eager to explore new technologies and tackle the next challenge. My approach to projects is methodical and efficient, which allows me to exceed expectations and meet deadlines consistently. Areas of Expertise: Programming Languages: Java, J2EE, Spring: Deep expertise in building robust backend applications. PHP, Node.js: Skilled in dynamic server-side development. JavaScript (Angular, React, Vue.js): Proficient in creating interactive and responsive client-side interfaces. Python: Proficient in Python programming, emphasizing automation, data analysis, and backend solutions. Web Development: Skilled in a broad range of web development techniques and technologies, catering to both frontend and backend needs. Others: C, C++, RESTful and SOAP APIs, SQL, Hibernate, Maven, Gradle, Microservices. Web Development: WordPress: Advanced experience in developing and managing websites, enhancing user experience and site functionality. Full Stack Development: Comprehensive ability to handle both frontend visuals and backend functionality seamlessly. Soft Skills: Communication: Excel at articulating project goals and technical details clearly, ensuring all team members are aligned. Initiative and Agility: Motivated by new challenges, I approach projects with enthusiasm and a readiness to innovate. Time Management: My projects are not only completed within deadlines but also with a quality that often surpasses expectations. I'm excited about the future projects and opportunities that lie ahead, and I'm always looking for ways to contribute to and learn from the vibrant tech community here in California.
Java
Amazon Web ServicesWeb ApplicationReactAngularNode.jsRESTful APIC++Spring BootJ2EEKotlinSQLJavaScriptPython - $50 hourly
- 5.0/5
- (1 job)
A visionary technology leader and open-source advocate with a passion for innovating in the field of software security. Proven track record of leading high-performance teams to deliver impactful solutions. Excels at identifying opportunities for growth and improvement in fast-paced environments.
Java
OpenStackC++CJSONREST APILinuxVMWareAgile Software DevelopmentGitHubGitSNMPSSHAnsiblePython - $100 hourly
- 4.7/5
- (2 jobs)
I have more than 10 years of experiencing developing beautiful and scalable apps. Based in San Francisco, I'm highly versed with the latest technologies and software engineering practices. I also very passionate about user experience and always try to build the best user interfaces. I'm highly experienced with the following: - iOS / Obj-C / Swift - Android / Java / Kotlin - AI, ML, TensorFlow, Pytorch - Firebase / Google Cloud - React / React Native / Flutter / Redux / Detox/ Jest - Laravel / PHP - Django / Python - Node.js / Javascript - MongoDB / Mysql / Memcache / Redis - C Sharp/.NET - Selenium Webdriver, - Blockchain, Ethereum, Dapp, erc token I usually do TDD(Test driven development) Client satisfaction is my primary objective and writing code that's clean, reusable, and high quality.
Java
Artificial IntelligenceMachine LearningiOS DevelopmentTensorFlowAndroidReactFlutterReact NativePyTorch - $70 hourly
- 0.0/5
- (0 jobs)
Over last 8 years I have developed a range of mobile applications for a huge set of clients starting from an Instagram-like startup and ending with a highly rated app featured by Apple using: ✓ Swift, Objective-C ✓ Kotlin, Java ✓ Dart/Flutter ✓ RxSwift, RxKotlin, RxJava, ReactiveCocoa ✓ Firebase, Firestore, AWS I am a hard worker, fast learner and good man with kind manner. Please feel free to contact me to have a talk about your project.
Java
JSONFigmaMobile App DevelopmentAndroid App DevelopmentiOS DevelopmentDartSwiftKotlinObjective-CiPadOSFirebaseFlutter - $150 hourly
- 0.0/5
- (2 jobs)
Deep operational and automation experience. Familiar with DevOps and development. Strong networking skills.
Java
PerforceLinux System AdministrationCFortiGate FirewallSQLF5, Inc.Cloud ComputingMicrosoft AzureAmazon Web ServicesPythonPerlGoogle Cloud PlatformBashIBM Cloud - $35 hourly
- 4.8/5
- (3 jobs)
Years of experience working with Python and Java and Linux to pursue my personal passion for computing, particularly in data science applications, wrangling, scraping, and cleaning data from various public sources into a SQL database for analysis and visualization using tools like Jupyter and Matplotlib. Since receiving my BA, I have continued my education online with a focus on computer science, receiving certificates on topics including machine learning and Python while working on Java projects using Spring and Spring Boot.
Java
DockerLinuxSpring BootSoftwareJupyter NotebookJetBrains IntelliJ IDEAMatplotlibGitPyCharmArduinoMachine LearningIBM SPSSPythonSQL - $25 hourly
- 5.0/5
- (1 job)
I am a student who has experience in software development, investment banking, consulting, quantitative research, and tutoring.
Java
Mergers & AcquisitionsGitHubFinancial AccountingCommunication SkillsMathematicsSQLFrenchCSSHTMLC++PythonQuantitative Research - $400 hourly
- 0.0/5
- (0 jobs)
Hello! I’m a seasoned Full Stack Developer with a rich background as a Senior Technical Director, specializing in creating SaaS services from scratch. With extensive experience in managing the entire technology stack—from database schema and backend services to user-friendly web and mobile frontends—I offer a comprehensive skill set that ensures high-quality, efficient product delivery. Technical Expertise: Full Lifecycle Development: Proven track record in designing, building, and maintaining scalable SaaS solutions, with a keen ability to translate complex product design specifications into actionable, efficient technical designs. Programming Languages & Tools: Proficient in JAVA (JDBC), C#, Objective-C, PHP, Python, JavaScript, and more. Experienced with Unity3D API, C/C++, and Blueprints. Comfortable using PyCharm, Airflow, Spark, Hadoop, Kafka, XCode, Unity3D Editor, Unreal 4, Apache, Docker, Tomcat, and AWS tools. Database & Cloud Solutions: Deep knowledge of database systems like MySQL, PostgreSQL, Redis, SQL Server, and Oracle 9. Skilled in cloud environments, including Google Cloud and AWS, with hands-on experience in AWS S3, Amazon Redshift, and Google BigQuery. Advanced Data Processing: Adept in data processing and warehousing technologies such as Spark, Presto, HDFS, Apache Parquet, Kafka, Flume, and Airflow, which helps in optimizing data flows and storage solutions. Networking & Software: Solid understanding of client-server software, ranging from HTTP REST to raw socket communications (TCP and UDP). Professional Strengths: Problem Solving: Skilled at identifying potential issues early in the development cycle, refining product ideas, and anticipating challenges to avoid roadblocks. Operational Efficiency: Passionate about designing and implementing tools to streamline and automate operations, significantly improving operational workflows and productivity. Collaboration & Leadership: As a former Senior Technical Director, I am adept at leading teams and projects, ensuring cross-functional collaboration and the seamless integration of technology solutions. Whether you're looking to build robust, scalable web applications or intricate, data-driven backend systems, I am here to help you turn your vision into reality. Let’s connect and create something outstanding together!
Java
WebsiteMobile AppAndroidBig DataiOSCSSHTMLJavaScriptC#C++PythonAmazon Web ServicesAI App DevelopmentWeb Application - $70 hourly
- 0.0/5
- (0 jobs)
I have high skills and extensive experience with backend programming, I specialized and mostly work in Java, C# projects. I have 7+ years of experience with Java, Spring Framework, J2EE, and Hibernate platforms. I have very good experience with Web APIs, REST APIs, Payment Gateway, Social Media Integration, ERP, and CMS Development. - Develop custom software from A to Z, build sophisticated APIs, integrate third-party APIs, data hubs, and gateways. - I can Develop any type of E-commerce platforms and chatting application. I have very good experience with Web APIs, ERP, and CMS Development. * Java: Core Java, J2EE, JDBC, REST, Servlets, Swing, AWT, Java Beans, Thymeleaf, Hibernate, Apache Kafka, Akka, Microservices * Spring Framework: Boot, MVC, Annotation, Security, Eureka, Data * C#, ASP.NET, PHP/Laravel * Serverless Architectures: AWS, Aurora, Cognito, S3 Bucket, DynamoDB, AppSync, Amplify * Realtime Communication: WebRTC, Socket.io, Twilio, Jitsi, OpenTok * Database: Oracle, MySQL, MongoDB, PostgreSQL, MSSQL * DevOps: Git, Bitbucket, DigitalOcean, Maven, Docker * Cloud Platforms: GCP, Firebase, FireStore * Web Servers: Apache Tomcat, Nginx * Testing: JUnit, Spring Test
Java
C#PHPCustom PHP - $100 hourly
- 0.0/5
- (0 jobs)
Hi there, my name is Kevin Mudrick I’m a Senior Software Developer on the hunt for great opportunities and looking to build great long-lasting relationships. The JavaScript (React / Node.js) and Java / Spring ecosystems are where I spend most of my time, however, I would consider myself language agnostic and someone who always enjoys a good challenge and getting his hands dirty. Technology Skills: Front-End - JavaScript - React - Angular - React Native Backend - Node.js - Java / Spring MVC - MongoDB - Firebase - SQL Finally, technology that doesn’t make our lives easier, is useless. On that note, I want to be a part of teams that are daring enough to do so.
Java
React NativeAngular 4AWS LambdaAWS AmplifyFirebase Realtime DatabaseMongoDBAmazon Web ServicesTypeScriptExpressJSReactNode.jsSpring BootJavaScriptResponsive Design - $80 hourly
- 0.0/5
- (0 jobs)
I'm a software engineer with +9 years in the tech industry and +7 in mobile currently living and working in Oakland, CA. My particular interest today is the convergence of mobile platforms through internet services and improve the user experience. I'm also innovative and in constant research and development of new technologies, frameworks and features related to the mobile industry. I strongly believe in teamwork as the key factor to any successful development and I enjoy sharing my motivation and focus with the rest of the team. Specialties: - iOS Developer for iPhone / iPad / iPod Touch using Objective-C / Swift(SwiftUI). - Android Developer for Android Phones and Tablets - Mobile Architect, Functional Analysis and Software Engineering. - Project Manager & Technical Leadership
Java
KotlinCore BluetoothiOSAndroidSwiftAndroid SDKUIKitApp StoreFirebaseiOS SDKFood Delivery ApplicationMobile App DevelopmentRxSwiftHealth & Fitness - $120 hourly
- 0.0/5
- (0 jobs)
I have over three decades of experience in the tech industry. I specialize in Data Engineering, ML Engineering, and Full Stack Development, bringing innovative solutions to complex challenges. My expertise spans across designing and implementing scalable data pipelines, building event-driven systems, and building distributed systems and microservices architectures that efficiently handle massive workloads. I possess a deep understanding of Data Science, Business Intelligence (BI), and Machine Learning (ML), which enables me to build and contribute to complex, data-driven applications. I'm fluent in a wide array of languages and technologies such as Python, Java, Scala, GoLang, C++, TypeScript, and JavaScript, and I have recency and proficiency in frameworks and platforms like Node.js, Next.js, and React. This diverse skill set allows me to develop and optimize applications across the full stack, ensuring high performance, reliability, and user satisfaction. I have extensive experience in ML, Data Science, and MLOps, and have delivered many ML products in production on projects ranging from anomaly detection to advanced NLP and, recently, cognitive architectures, prompt engineering, and RAGs. I have real-world experience with PyTorch, TensorFlow, Keras, Scikit-learn, NLTK, and the usual suspects (Pandas, Numpy, etc) Whether it's transforming raw data into actionable insights, or architecting resilient systems that stand the test of time, or both at once, my goal is to empower businesses through technology, delivering solutions that exceed expectations.
Java
Data ScienceData Analytics & Visualization SoftwareFunctional ProgrammingMLOpsMachine LearningBusiness IntelligenceFull-Stack DevelopmentSQLNext.jsReactTypeScriptScalaGolangPython Want to browse more freelancers?
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