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Hire the best Java Developers in Toronto, PE

Check out Java Developers in Toronto, PE with the skills you need for your next job.
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  2. Development & IT Talent
  3. Java Developers
  4. Canada
  5. (Current) Toronto, PE, PE
  • $65 hourly

    • 5.0/5
    • (3 jobs)
    🌟 Proven Ex-Amazon Senior Software Engineer with 12+ Years of Experience 🌟 Are you seeking a seasoned software engineer with a background in both FinTech and tech giants like Amazon? Look no further! With over 12 years of hands-on experience, including tenure as part of a dynamic FinTech team and a successful stint at Amazon, I bring a unique blend of expertise, innovation, and leadership to every project. 🔍 Why Choose Me? ✅ Amazon-Caliber Expertise Having navigated the intricate systems and fast-paced environment at Amazon, I bring a wealth of experience in developing large-scale solutions that can withstand the demands of the modern digital landscape. ✅ AWS Architecture Certifications Holding AWS architecture certifications, I bring a deep understanding of AWS services and best practices to architect and deploy scalable, secure, and highly available solutions. ✅ React, React Native, Node.js, Next.js Experience Proficient in React/React Native for building dynamic user interfaces, Node.js for scalable backend development, and Next.js for server-side rendering and efficient client-side routing, ensuring seamless and performant web applications. ✅ Technical Interviewer With a background in conducting technical interviews, I possess a deep understanding of what it takes to identify top talent and build high-performing teams. ✅ Innovative Problem Solver Whether it's optimizing performance, streamlining workflows, or tackling complex challenges, I thrive on finding innovative solutions that exceed expectations. ✅ Collaborative Team Player With a proven track record of collaborating with cross-functional teams, I excel at fostering a culture of collaboration and driving projects towards successful outcomes. 🚀 Services I Offer: 🔹 Software Development Custom software solutions tailored to your unique requirements, utilizing the latest technologies and best practices. 🔹 System Architecture Designing scalable, resilient, and secure systems that lay a solid foundation for your digital initiatives. 🔹 Serverless Implementation Leveraging cloud-native serverless architectures to build highly scalable and cost-effective solutions. 🔹 Database Design Designing and optimizing database schemas for efficient data storage and retrieval. 🔹 React/React Native, Node.js, Next.js Development Building modern web/mobile applications with React/React Native for dynamic frontends and Node.js for scalable backend services, along with Next.js for server-side rendering and efficient client-side routing. 🔹 Code Reviews & Optimization Enhancing the efficiency, reliability, and maintainability of existing codebases through meticulous code reviews and performance optimizations. 🔹 Technical Consultation Strategic guidance and insights to help you make informed decisions about your technology roadmap and architecture. Let's collaborate to bring your vision to life and elevate your software projects to new heights. Reach out today to discuss how I can contribute to your success!
    vsuc_fltilesrefresh_TrophyIcon Java
    Bash Programming
    C
    C++
    AWS Development
    AWS AppSync
    AWS Amplify
    AWS Lambda
    Angular
    Firebase
    React Native
    AWS CloudFormation
    Node.js
    JavaScript
    Python
    NoSQL Database
    React
    HTML5
    SQL
  • $65 hourly

    • 5.0/5
    • (5 jobs)
    Hello, I'm a software engineer with 8+ years experience. I am very expert in Java and Spring Boot, AI development and I can develop difficult applications from scratch. As a talented developer with deep understanding about Java, Spring Boot, I love to help my clients with high quality code and unlimited support. I am confident in my ability to deliver a flexible and user-friendly platform that meets your specific requirements. - Expert in Java and Python, with knowledge of multiple frameworks ​such as Spring boot, hibernate, Django, Flask, etc. - JavaScript, ReactJS, MaterialUI, CSS, HTML, Node.js - Familiar with ORM (Object Relational Mapper) libraries - Linux, AWS, Azure, GCP, DigitalOcean - REST, JSON, SOAP, XML, OAuth - Able to integrate multiple data sources and databases into one system -Understanding of fundamental design principles behind a scalable application - MySql, MariaDB, PostgreSQL, MongoDB, DynamoDB, ElasticSearch, Kafka, Redis, Nginx
    vsuc_fltilesrefresh_TrophyIcon Java
    C++
    Next.js
    Python
    MongoDB
    Jira
    Spring MVC
    RESTful API
    J2EE
    JavaScript
    Node.js
    Spring Framework
    Hibernate
    React
    Spring Boot
  • $70 hourly

    • 5.0/5
    • (3 jobs)
    I am a full-stack developer with deep knowledge of AI and It's mainstream models. I specialize in developing software running in Kubernetes clusters e.g. Azure, AWS, GC, Openshift with the focus on cybersecurity and identity management. I am an expert in cloud migrations too. Key Expertise: -- Full Stack Development: Backend Development: Java, Spring Boot, Scala, Go, Rust, C++, Python, Node.js Frontend Development: Angular, React, Vue.js, HTML/CSS, TypeScript, WebAssemebly Cloud Platforms: AWS, Azure, Google Cloud, OpenShift, Docker, Kubernetes Databases: SQL Server, Oracle, MongoDB, PostgreSQL, MySQL, Neo4j, Cassandra Messaging: Kafka, Akka, ActiveMQ, RabbitMQ, Azure Event Hub & Google Pub/Sub Identity and Security: OID, OAUTH2, PKI, KeyClock, EntraID, AWS Congito and other identity providers, PKI, AES, RSA, ECC -- AI & Machine Learning Expertise: Generative AI: Development of large language models (LLMs, OpenAI, Vertex Ai, ChatGPT, LLama), RAG and Agentic AI, LangGraph, LLamaIndex, LangChain & LangGraph, and other NLP solutions Machine Learning: Building and deploying machine learning models for classification, prediction, and data analytics Autonomous Agents, Graphs & Knowledge Graphs: Experience in building autonomous AI agents capable of decision-making, planning, and task execution using reinforcement learning, multi-agent systems, and LLM-based architectures. Developed agents for real-time data processing, automated workflows, computer vision, and self-adaptive AI solutions in diverse environments. AI Frameworks: TensorFlow, PyTorch, Scikit-learn, Keras, MediaPipe FHE (Fully Homomorphic Encryption): Expertise in secure data processing, enabling encrypted AI and machine learning workflows Natural Language Processing (NLP): Implementing intelligent agents, conversational AI, and language models for automated decision-making Computer Vision: AI-based image and video recognition using deep learning techniques Edge AI: Developing and deploying AI solutions on edge devices, leveraging WebAssembly and MediaPipeline -- Cloud App Migration & DevOps Expertise: Cloud Migration: Extensive experience in migrating enterprise applications to the cloud using both lift-and-shift and refactoring approaches Lift-and-Shift: Proven ability to seamlessly migrate legacy systems to cloud platforms like AWS, Azure, and Google Cloud with minimal disruption to operations Cloud-Native Refactoring: Re-architecting applications to fully leverage cloud-native services such as serverless, containerization, and microservices for enhanced scalability and performance Infrastructure as Code (IaC): Expertise in automating deployments using tools like GitHub Actions, Terraform, and Azure Resource Manager CI/CD Pipelines: Designing and managing continuous integration and delivery pipelines with tools like Jenkins, Azure DevOps, and GitLab CI DevOps Tools: Proficient in Docker, Kubernetes, OpenShift, and monitoring solutions like Splunk, Prometheus, and Grafana -- Blockchain & Cryptography Expertise in Web3, Solana, zkSnarks, Circom -- Blockchain Algo Marginal Trading: Hyperliquid, Binance, Coinbase Post - quantum blockchain migrations encrypted computations to ensure privacy and security
    vsuc_fltilesrefresh_TrophyIcon Java
    Retrieval Augmented Generation
    ChatGPT
    Apache Kafka
    Kubernetes
    Artificial Intelligence
    Blockchain
    Next.js
    Vue.js
    React
    Angular
    Spring Boot
    Scala
    Python
    Rust
  • $50 hourly

    • 5.0/5
    • (42 jobs)
    Hello! I'm Pavlo, an individual Android (Kotlin, Java) and iOS (Swift) developer with 11 and 6 years of commercial experience, respectively. I also have a few months of commercial experience in cross-platform development using Flutter. If you are looking for such a specialist, please take a couple of minutes to check out my profile. 🟢 MY SERVICES 🟢 The services I provide cover a broad spectrum of capabilities, which include, but are not limited to: - Developing mobile applications for iOS and Android, including iPhone, iPad, Android phones and tablets, TV and wearable devices. - Providing ongoing support, maintenance, and updates for existing apps. - Porting apps from different platforms to iOS and Android. - Recreating cross-platform and hybrid apps using native technologies. - Performing code migrations and updates, including SDK version, package builder, legacy libraries, and other tools. - Transforming app designs from Figma into functional applications. - Incorporating in-app purchases and advertisements into the apps. - Submitting the apps to the App Store and Google Play, resolving any review-related concerns. - Conducting prototyping and UI/UX design. - Creating comprehensive technical documentation and API specifications. 🟢 MY WORKING EXPERIENCE 🟢 My commercial experience as a mobile developer began in 2013 when I secured a job as an Android Java developer. Since 2015, I have been working exclusively as a freelancer. In 2016, I started learning Swift programming language and embarked on my career as an iOS developer. In 2018, I made a complete transition from Java to Kotlin for new Android projects. Recognizing the market's need for cost-effective solutions, in 2023, I started working as a Flutter developer. Throughout my journey, I have seamlessly acquired expertise in UI/UX design by closely adhering to the platform guidelines of both iOS (Human Interface Guidelines) and Android (Material Design). As an active user of both platforms, I constantly stay updated with the latest trends in products and technologies, ensuring I never miss out on key events like Apple WWDC and Google I/O conferences. Building upon my previous commercial experience as a QA engineer from 2012 to 2013, I combine meticulous attention to detail with strong perfectionistic tendencies, enabling me to consistently deliver exceptionally high-quality and reliable mobile applications. 🟢 MY SKILLS 🟢 Here are some of the cutting-edge technologies I utilize in my work. Native Android: - Android SDK, Gradle, Kotlin, Kotlin Coroutines, MVVM Architecture, Jetpack, Jetpack Compose, Retrofit, Apollo GraphQL, Hilt, Room for SQLite, and JUnit. Native iOS: - iOS SDK, Swift, Swift Package Manager, MVVM Architecture, SwiftUI, Combine, Concurrency, Alamofire, Apollo GraphQL, Swinject, CoreData, and XCTest. Flutter: - Flutter SDK, Dart, MVVM Architecture, Concurrency, dio, sqflite. I possess extensive experience working with numerous other technologies, frameworks, and libraries such as: Java, RxJava, XML UI, CocoaPods, UIKit, RxSwift, MVC & MVP Architecture, Dagger, Koin, Realm, Glide, Coil, Picasso, Kingfisher, SDWebImage, Google Maps & Geocoding, MapKit, HealthKit, Mapbox, Facebook SDK, Twitter SDK, Zoom SDK, GitHub SDK, Google Pay, Apple Pay, Stripe, Braintree, AdMob, Bluetooth, Bluetooth Low Energy (BLE), NFC, Camera API, Firebase SDK (Analytics, Crashlytics, Auth, Database, Firestore, Machine Learning, Storage, Hosting, Cloud Functions, and more).
    vsuc_fltilesrefresh_TrophyIcon Java
    Figma
    iPad App Development
    iOS SDK
    Android SDK
    Apple Xcode
    Android
    Android App Development
    Kotlin
    iOS
    Swift
    iOS Development
    Firebase
    Android Studio
    iPadOS
  • $55 hourly

    • 5.0/5
    • (7 jobs)
    I possess 6 years of experience in software development and 4 years in teaching and curriculum development. Well versed in enterprise applications in JAVA/J2EE/HTML/JSP/Angular/React/REST/Spring and SOAP Webservices,PHP, Python. With an excellent track record of building robust applications as a developer and transforming incoming graduates into industry professionals as an instructor.
    vsuc_fltilesrefresh_TrophyIcon Java
    Apache Kafka
    RabbitMQ
    Spring Boot
    Spring MVC
    Python
    PHP
    MySQL
    Angular
  • $60 hourly

    • 4.7/5
    • (49 jobs)
    I am a self-motivated and diligent computer programmer who finds that the best way to develop solutions is to think outside the box. I believe that when it comes to programming work, it’s equal parts creativity and logic. I have found that being a positive, disciplined, and effective communicator, I cannot only get through any challenge, but I’m also able to evoke the same measure of resilience from those around me. • Master of Applied Computing (Artificial Intelligence stream) student with 4+ years of experience in human-computer interaction application design, development, debugging, testing, and deployment of 40+ applications • Skilled and experienced in different stages of data science lifecycle; including extracting data, design, model building, testing and validation, implementation, communication, and retraining • Possess a fervent interest in artificial intelligence, and natural language processing to capture the data from images, text, and handwriting, as well as knowledge of machine learning concepts, data visualization, and other related technologies • Ability to identify, understand, learn, and translate a program into a sustainable, advanced technical solution through Python, R, C/C++, Spark, SQL, Java, Kotlin, XML, Dart, Swift, Objective-C, and other programs for continuous improvement of AI technologies and mobile applications My expertise includes, • Programming Languages: Python, R, C, C++, Spark, Java, Swift, Kotlin, Dart(Flutter), PHP • Database: RDBMS, MySQL, Firebase Database, Cloud Firestore, Microsoft SQL Server, Oracle Database, MongoDB • Development tools: Google Colab Notebook, Visual Studio Code, PyCharm, RStudio, Android Studio, Xcode, Eclipse, Git, LaTex, Microsoft Office • Cloud Services: Hadoop, Apache Spark, Azure, GCP, AWS, IBM Cloud, Firebase Cloud • Machine Learning: Natural Language Processing, TensorFlow, Optical Character Recognition, MNIST, PyTorch, Keras, Pandas, Numpy Scikit-learn, Matplotlb • Version Control/ Management: GitHub, GitLab, BitBucket, JIRA, Trello, Slack, Confluence
    vsuc_fltilesrefresh_TrophyIcon Java
    iOS Development
    Android App Development
    Payment Functionality
    Hybrid App Development
    Flutter
    Dart
    Bluetooth
    Kotlin
    Game Development
    Android SDK
    Database
  • $50 hourly

    • 4.1/5
    • (8 jobs)
    I manage a team that specializes in Software Innovations, Research and Development. We create innovative non-templated solutions which transform startup ideas into successful businesses. What we can do for you: - Custom software development for startups - our dedicated team provides you with a custom solution that suits your technical and business needs the most. As a result of our collaboration you get a fully-functional web/mobile/desktop product, from design to deployment, as well as post-production support; - AI software and apps - having profound expertise in AI/ML development we create solutions that are aimed to support your business and keep it on top of technological progress; - AR/VR design and development - we build Augmented reality and Virtual reality applications which improve operational effectiveness, reduce training time, and thus can empower your processes and open new business opportunities; - Data Analysis and Analytic Dashboards - we provide bespoke digital solutions for data analysis, visualization and building customizable reports, which are geared to your business operations and tailored to your existing methods of data collection. No matter how many data types you have, you get them connected into one source to facilitate data-driven business decisions. Our expertise: - Mobile development (native iOS/Android development, cross-platform development) - Web development - Desktop development (Windows OS desktop software) - Design (UI\UX) - AI/ML development - AR/VR development Our competency includes: - .Net - Java - Front-end (Angular) - Android - iOS Domains we work with: - education - GIS - sports - public services - healthcare - public utilities
    vsuc_fltilesrefresh_TrophyIcon Java
    AMP Framework
    DevOps
    VR Application
    Graphic Design
    AR Application
    iOS Development
    Virtual Reality
    Project Management
    Product Management
    Scrum
    C#
    Augmented Reality
    Android
  • $40 hourly

    • 5.0/5
    • (6 jobs)
    As a student of Computer Engineering , I am currently looking for remote opportunities. With years of experience on Android application development, If you are seeking, high quality of work with fast turn around & in the fair price, please contact me you won't be disappointed. I started as an Android Developer with Java and Kotlin. I am skilled with the following ✅ Android - MVP/MVVM Architecture - RXJava/RxAndroid/Dagger ✅ Mobile App Design
    vsuc_fltilesrefresh_TrophyIcon Java
    Android SDK
    Reverse Engineering
    Kotlin
    Android NDK
    Mobile Advertising
    Unity
    Mobile App Localization
    Swift
    Android
    API
    Mobile UI Design
    API Integration
    Android App Development
  • $50 hourly

    • 5.0/5
    • (1 job)
    12+ years as a full stack developer (Java). 5+ years developing enterprise content management systems. Worked for large technology companies such as Xerox.
    vsuc_fltilesrefresh_TrophyIcon Java
    Linux
    Ember.js
    Microservice
    Hibernate
    Spring Framework
    JavaScript
    jQuery
  • $80 hourly

    • 5.0/5
    • (6 jobs)
    AWS and Kubernetes-certified engineer with 6+ years of experience in building, automating, and optimizing infrastructure and deployment processes in on-premise and cloud environments (AWS, Azure, GCP). Proficient in DevOps tools like Terraform, Ansible, Jenkins, and Kubernetes. Experienced in machine learning infrastructure using Airflow, Apache Spark, and PyTorch. Certified in AWS Solutions Architect, Terraform Associate, Red Hat Containers & Kubernetes, and Cloud Security (CCSK).
    vsuc_fltilesrefresh_TrophyIcon Java
    CI/CD Platform
    AWS CloudFormation
    DevOps
    API Development
    Amazon Web Services
    Terraform
    Infrastructure as Code
    Software Architecture & Design
    Google Cloud Platform
    CI/CD
    Microservice
    Kubernetes
    Python
    Bash
  • $50 hourly

    • 4.9/5
    • (27 jobs)
    🌟 Rewarded as 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆 by Upwork (𝗧𝗼𝗽 𝟯%) 🌟 100% Job Success Ratio
 🌟 8+ Years in Mobile App Development
 🌟 30+ Successfully Completed Projects Hello! I'm Vivek, a seasoned Senior Software Developer and passionate tech enthusiast. I'm eager to assist you in crafting top-tier, modular software that aligns with your requirements while prioritizing performance and security. Why to hire me among thousands of other freelancers? I distinguish myself through an unmatched commitment to work quality and professionalism. Establishing trust with clients and fostering effective communication are integral components of my skill set. As a developer, I strive to keep up-to-date with the latest techs from Android and Apple, and use each standard introduced with ease while following the best guidelines in order to make my code readable and maintainable. I thrive on challenges! With a positive mindset, I approach every task with determination, doing whatever it takes and never giving up. Skills: ------- ✔ Cross-platform app development, ✔ RESTful API integration, ✔ Android components (Activities, Services, Broadcast Receivers, Content providers) ✔ Fragments API, Intents, etc. ✔ Java Core, Threads, Collections. ✔ Payment and Social media SDKs integration ✔ Firebase, FreshChat, Socket.io for chat-based application ✔ Voice, Chat and Video calling integrations ✔ Google Map, Ads, In-App Purchase, In-App Billing implementation Version control and Issue tracking - Git, Bitbucket - Trello, JIRA My Working pattern: - Following Complete agile methodology - Trello/Pivotal Tracker implementation - Implementation using best architecture patterns But don't just take my word for it – let my work speak for itself. Check out my portfolio to see some of my past projects and success stories. Don't hesitate to reach out! Your project deserves the expertise and commitment that I bring to the table. Thanks, Vivek
    vsuc_fltilesrefresh_TrophyIcon Java
    Socket.io
    API
    Apple Xcode
    API Integration
    Mobile App Development
    Flutter
    Swift
    Android Studio
    Kotlin
    iOS
    Android
    Android App Development
    iOS Development
  • $120 hourly

    • 5.0/5
    • (2 jobs)
    Hello! I’m a Senior Software Engineer passionate about solving complex data challenges with efficient, scalable solutions. Proficient in Scala, Java, Python, and Go, I excel with big data technologies like Kafka, Flink, Spark, BigQuery, and Druid, and in building robust infrastructure using Kubernetes. My expertise also extends to implementing advanced observability frameworks with tools like Prometheus and Grafana. Key Achievements: • Leadership: At Unity Technologies and LCBO, I led projects and teams, significantly reducing costs and enhancing service quality by introducing advanced tech solutions and optimizing cloud operations. • Teaching: As an adjunct instructor, I’ve taught over 100 postgraduates and undergraduates in machine learning and Java programming, equipping them with skills directly applicable in real-world tech environments. • Speaking: Delivered influential talks on Streaming Systems and big data technologies to tech communities, sharing insights on scalable data processing and system architecture enhancements. • Open Source: Actively contributed to Apache Druid and the Franz-go Kafka Client, with my enhancements now part of their core offerings, improving data management and monitoring capabilities. I’m excited to bring my deep technical expertise and proven track record of innovative problem-solving to your projects, ensuring top-tier results through strategic planning and cutting-edge technology.
    vsuc_fltilesrefresh_TrophyIcon Java
    Apache Beam
    Apache Flink
    Data Processing
    Data Visualization
    Database
    Data Analysis
    Data Management
    API Development
    Data Ingestion
    Data Mining
    Software Development
    Scala
    ETL Pipeline
    Apache Kafka
  • $35 hourly

    • 5.0/5
    • (8 jobs)
    I am a Full Stack Web and Mobile Developer. I am specialised in the use of React JS and React Native to deliver efficient and responsive front end implementations. I am also specialised in the use of the Django Framework to implement a robust back end. Besides the above, I am proficient in various languages such as Javascript, Java, Python, C, Kotlin and Swift. I have experience with many aspects that pertain to web and mobile development. I am a Machine Learning Enthusiast and I also spend alot of my free time learning more frameworks and libraries that help push my skills even further!
    vsuc_fltilesrefresh_TrophyIcon Java
    Apple Xcode
    Node.js
    CSS
    React Native
    Android Studio
    JavaScript
    Swift
    Kotlin
  • $44 hourly

    • 5.0/5
    • (1 job)
    With over 7 years of experience as a computer science engineer, I can help architect, design, build and deploy software solutions for your company. Additionally, I have 4+ years of experience scripting and writing ETL in SAS. I am proficient in administering SAS Size Pack Optimization solution, and building tools to optimize supply chain processes. I have successfully developed and deployed SQL/Java/JQuery/HTML/CSS applications for multiple mid- to large-sized retailers. I have experience with Apache NiFi to build a complex ETL workflow.
    vsuc_fltilesrefresh_TrophyIcon Java
    SAS
    AWS Application
    Apache NiFi
    GitHub
    SQL
    JavaScript
    Python
    CSS
    HTML5
  • $45 hourly

    • 5.0/5
    • (10 jobs)
    Over 5+ years of experience in software development and web development Self-starter and motivated to adapt to new technology Worked on a web application using Spring MVC Developed a microservice using REST and Spring Boot Implemented queue-based Microservice architecture to support asynchronous communication using Spring Boot, Java 8 Led, architecture, documented, and developed profanity tool Developed a Student Tracking System to track student data including dropout rates, a program of study, post-graduation, and employment rate which helps officials to analyze the data
    vsuc_fltilesrefresh_TrophyIcon Java
    RabbitMQ
    API Integration
    Microservice
    Core Java
    RESTful Architecture
    Spring Framework
    RESTful API
    MySQL
    Software Architecture & Design
    Azure Cosmos DB
    API
    CSS
    Spring Boot
    JavaScript
  • $45 hourly

    • 5.0/5
    • (2 jobs)
    In my work, I delve into the latest advancements in technology, with a sharp focus on AI and its various applications and hurdles. My aim is to simplify intricate technical details into easily digestible content that appeals to a wide audience, offering a well-rounded view of the subject matter. I have penned numerous pieces covering AI topics ranging from natural language processing and computer vision to machine learning and ethical considerations. Beyond my writing expertise, I bring hands-on experience in software development gained through internships and academic pursuits. My proficiency extends to enhancing web development practices for faster-loading and more responsive webpages as well as delving into mobile app development by spearheading projects independently. Furthermore, I have pursued diverse certifications and courses in AI, Python, and JavaScript to elevate my analytical and technical competencies. My enthusiasm lies in exploring how human cognition intersects with the tangible world while leveraging my technical acumen to drive innovations.
    vsuc_fltilesrefresh_TrophyIcon Java
    Machine Learning
    Data Science
    JetPack
    Kotlin
    Google Cloud Platform
    CI/CD
    Automation
    Firebase Cloud Firestore
    JavaScript
    Python
    Software
    WordPress
    Android Studio
    Software Development
  • $40 hourly

    • 4.9/5
    • (10 jobs)
    As a highly skilled and experienced freelance developer, I have a strong background in end-to-end development, building complex technological infrastructures. I have a Bachelor of Science in Computer Science from the University of Toronto and have worked with various companies, including Reno Tahoe Car Rental, Light Consulting, Wazzle, EcoCart, and Saskatchewan Government Insurance. Throughout my career, I have gained extensive knowledge and experience in a wide range of programming languages, including Python, JavaScript, HTML/CSS, Java, C, Kotlin, and TypeScript. I am also proficient in various frameworks and tools such as React.js, React Router, React Redux, Next.js, Next.js App Router, Next.js Page Router, Next.js SEO, Node.js, Express.js, Django, React Native, React Native CLI, React Native Expo, Flask, Django, Django Rest, AWS, SQL, Tailwind CSS, and Git. In my most recent role as Head of Engineering at Reno Tahoe Car Rental, I led the architecting and development of MVP model and SaaS platform Web apps with customer-facing and admin panel components. I developed robust, scalable, modular, and API-centric infrastructures, performing custom and public API integrations. As a freelance developer, I am dedicated to providing high-quality services, adhering to SOLID design principles and Clean Architecture. I have experience in performing unit and instrumentation tests to identify bottlenecks, rectify bugs, and optimize application performance. My project experience includes designing and architected an Android app, utilizing algorithms to analyze complex data, and developing a beginner-friendly programming language. Overall, I possess a unique blend of technical expertise, problem-solving skills, and leadership abilities that make me a valuable addition to any team. I am excited to take on new challenges and provide the highest level of services as a freelance developer.
    vsuc_fltilesrefresh_TrophyIcon Java
    Browser Extension
    Next.js
    ExpressJS
    Flask
    API Development
    RESTful API
    Django
    Flutter
    Node.js
    React
    React Native
    TypeScript
    Python
    JavaScript
  • $100 hourly

    • 5.0/5
    • (1 job)
    I am Qiaoji Xu, holding a Ph.D. in Science, Mathematics, and Statistics from the University of Ottawa, and I bring over years of advanced experience in data science, statistics, and machine learning to your projects. With a strong background in finance and engineering, I have honed my skills in statistical analysis, risk management, algorithmic optimization, and predictive modeling across various domains including comparative genomics and finance. My expertise spans across creating innovative solutions using advanced statistical programming skills in Python, R, and machine learning technologies for large datasets, including experience in cloud computing, multiprocessing, network graphical virtualization, operating systems, and SQL relational databases. I am passionate about solving complex problems and delivering results that drive strategic business decisions and research outcomes. Throughout my career, I have demonstrated an ability to work collaboratively with cross-functional teams, leading projects that involve model impact assessment, statistical solution development, and the creation of novel algorithms. My work has directly contributed to improving product portfolios, estimating techniques, forecasting models, and risk management practices within top organizations such as Scotiabank and Ciena. Core Competencies Include: Expertise in Python, R, PySpark, SQL, SPSS, SAS, AWS, Google Cloud Computing, and various data visualization tools. Proven track record in predictive modeling, statistical analysis, bioinformatics, computational biology, machine learning (including simulation, regression models, SVM, hyperparameter tuning, neural networks, deep learning, and NLP), data mining, and ETL processes. Extensive experience with GIS spatial analysis, pipeline/algorithm design, and the ability to develop and optimize models for various applications in finance and genomics. Exceptional analytical and problem-solving skills, with a focus on providing innovative and creative solutions to enhance research targets and business efficiency. My previous projects have spanned a wide range of applications, including analyzing large network datasets to maximize network resiliency, predicting outage occurrences, assessing the likelihood of fiber cuts with high accuracy, and implementing machine learning models for digital image recognition. These endeavors have not only showcased my capability to handle vast datasets but also my commitment to delivering precision and excellence in every project. By integrating my rigorous academic background with practical, hands-on experience in both academic and industry settings, I am well-equipped to offer comprehensive support in: Econometric Modeling and Statistical Analysis Predictive Modeling and Machine Learning Applications Data Visualization and Interpretation Advanced Statistical Programming and Algorithm Development Whether your project involves complex dataset analysis, the development of predictive models, or seeking insights from large-scale data, my aim is to bring out the highest quality results, ensuring success and advancement in your endeavors. With a blend of enthusiasm, dedication, and a proven track record of contributing to high-profile projects, I am confident in my ability to make a significant impact on your projects, driving them towards strategic goals and beyond. Let's collaborate to transform data into actionable insights and achieve your project's full potential. Looking forward to working with you soon, Qiaoji Xu Contact: limqiaojixu@gmail.com | Toronto, ON, Canada
    vsuc_fltilesrefresh_TrophyIcon Java
    Model Optimization
    Model Documentation
    Bioinformatics
    Sass
    Product Development
    Information Analysis
    Analytical Presentation
    SQL
    Data Visualization
    R
    Python
    Data Analysis
  • $50 hourly

    • 5.0/5
    • (0 jobs)
    👋 Hello! I'm James, a Software Developer. 🚀 Skills: Proficient in React, HTML, CSS, PHP, JavaScript, and Python. Experienced in leveraging deep learning technologies. 💻 Experience: Successfully developed and deployed web applications using a variety of technologies. 💡 Passion: Enthusiastic about exploring the intersection of software development and deep learning. 🌟 Why Me: Committed to delivering high-quality, innovative solutions. Excited to contribute my skills to your projects. Let's build something amazing together!
    vsuc_fltilesrefresh_TrophyIcon Java
    Deep Learning
    Amazon Web Services
    Google Cloud Platform
    Django
    C#
    ASP.NET
    TensorFlow
    PyTorch
    PHP
    CSS
    HTML
    React
    Python
    JavaScript
  • $50 hourly

    • 5.0/5
    • (2 jobs)
    Hello, World! This is Chris, a React/React Native junkie. With 10 years of experience in web and mobile frontend development, I am confident I will be an excellent fit for your next Senior React and/or React Native Engineer role. My experience has provided me with the innovative and technical skills necessary to successfully provide you with multifaceted technical solutions across a wide range of React world. I've refined my strengths through 6 years of experience in React, where I provided solutions in various kinds of web and mobile apps. The following is a snapshot of my broader technical skills. - React web apps and React Native mobile apps - Objective-C/Swift and Java/Kotlin experience for building native iOS/Android apps. - Agile Project Management At Quicken, I worked as a principal React/React Native engineer for a web/mobile app that offers 80 million monthly users personal finance management experience, I was specifically responsible for the improvement of the rendering performance in the transaction list. Now it smoothly loads more than 200,000 transaction items on both iOS and Android. I was also instrumental in implementing a lot of new functionalities such as "Free-To-Spend" and "Acme/Simplifi Rebrand". It'd be a pleasure to learn more about your needs, and I would welcome the chance to provide further insight into my knowledge of technical abilities, personal attributes, and track record of success in building revenue-generating web technologies compatible across multiple platforms, browsers, and devices. Thank you for considering my candidacy for this position, I hope to hear from you soon to schedule an interview. Sincerely. Chris.
    vsuc_fltilesrefresh_TrophyIcon Java
    Web Application
    Redux
    Swift
    Objective-C
    JavaScript
    React
    iOS Development
    Mobx
    React Native
  • $110 hourly

    • 5.0/5
    • (2 jobs)
    I'm an experienced Android and Web developer with extensive experience in building high quality apps and sites. My experiences range from building responsive mobile sites that work well cross-browser to building great native Android apps. I'm flexible with my working hours and am happy to work closely with any existing freelancers you work with. I look forward to hearing from you!
    vsuc_fltilesrefresh_TrophyIcon Java
    Android
    React
    CSS 3
    JavaScript
    jQuery
    HTML5
    Node.js
    WordPress
    ExpressJS
  • $40 hourly

    • 5.0/5
    • (19 jobs)
    I am a Software Developer at The GCE, my responsibilities include maintaining and enhancing a cab booking system. I have a Bachelor's degree in Computer Software Engineering from Muran'ga University of Technology and 6+ years of experience in development. I have skills in Android and iOS development, Java, Springboot, Laravel, PHP, and Flutter. I believe in secure software systems that ensure the protection of data and identity. I have worked as a lead developer at Trichain Technologies, where I managed projects, delegated duties, and developed more than 20 mobile and web applications for different clients. I have also worked as a freelance software developer at Fiverr, where I delivered high-quality software solutions using various programming languages and APIs. Recently, I have worked with SmartLobby and GCE on both mobile and backend roles. In GCE, my tasks are optimizing the Laravel backend's interaction with the Google Location and Directions API to lower production costs. Through these efforts, I achieved an impressive 80% reduction in API expenses. The technologies and skills utilized included Google Cloud, Laravel, PHP, MySQL, Geolocation API, Directions API, AWS, and caching algorithms.
    vsuc_fltilesrefresh_TrophyIcon Java
    Map Illustration
    GPS
    API
    HTML
    Full-Stack Development
    Laravel
    Android SDK
    Camera
    Android Studio
    Kotlin
    PHP
    Dart
    iOS
    Android
    Android App Development
    Flutter
  • $60 hourly

    • 4.3/5
    • (1 job)
    I have over 10 years of experience in Java, Ruby, Python, Javascript and many frameworks associates with these languages. I have worked on over 100+ application throughout my career. I am looking for something exciting to work on.
    vsuc_fltilesrefresh_TrophyIcon Java
    Ruby
    Data Mining
    Front-End Development Framework
    MVC Framework
    DevOps Engineering
    JavaScript
    Software Architecture & Design
    MongoDB
    Cloud Architecture
    Data Analysis
    Machine Learning
    R
    Python
  • $20 hourly

    • 5.0/5
    • (1 job)
    Android app developer with five years of experience and a high level of skill in the mobile app industry. adept at developing unique, user-friendly applications for a variety of sectors. Java and Kotlin expertise that has been proven, resulting in code that is effective and optimized for smooth performance. adept at working with clients to comprehend their needs and meet deadlines with customized solutions. extensive knowledge in UI/UX design, API integration, and troubleshooting to guarantee streamlined functionality. Dedicated to staying current with market trends and technological advancements, continually producing outstanding Android applications that go above and beyond.
    vsuc_fltilesrefresh_TrophyIcon Java
    GeoAPI
    Google Maps
    Core Java
    React Native
    Location-Based Service
    Map Integration
    Mobile App Development
    Kotlin
    Android App Development
    Push Notifications
    API Integration
    Firebase Realtime Database
    In-App Purchases
    Native App Development
  • $28 hourly

    • 5.0/5
    • (6 jobs)
    ⭐ 𝟱-𝘀𝘁𝗮𝗿 𝗿𝗮𝘁𝗲𝗱 💯 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 𝗦𝗰𝗼𝗿𝗲 𝗼𝗻 𝟱 𝗹𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 🔝 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 𝗙𝗿𝗲𝗲𝗹𝗮𝗻𝗰𝗲𝗿 ⏱️ 𝟲.𝟱𝟬𝟬+ 𝗵𝗼𝘂𝗿𝘀 𝘄𝗼𝗿𝗸𝗲𝗱 🌎 𝗙𝗼𝗰𝘂𝘀 𝗼𝗻 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗳𝗿𝗼𝗺 𝗔𝗺𝗲𝗿𝗶𝗰𝗮𝘀 (𝗣𝗦𝗧-𝗘𝗦𝗧) Hi! I'm Sargis, your go-to Quality Assurance Engineer, bringing a 5-year track record of ensuring software excellence. With 5 years of experience across 8 diverse companies, I've worked on a wide range of products including SaaS, IaaS, mobile, web, and cloud applications. My experience spans various time zones, cultures, and company sizes. My mission? To connect your vision with a seamless user experience, excelling in both Manual and Automated Testing. 𝗠𝗮𝗻𝘂𝗮𝗹 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 🔍 5 years of experience in Manual Testing with companies such as 𝗣𝗶𝗰𝘀𝗮𝗿𝘁, 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝗧𝗶𝘁𝗮𝗻, and 𝗣𝗲𝗲𝗿𝗦𝘁𝗿𝗲𝗮𝗺. I focus on detailed testing using tools like JIRA, Zephyr, and TestRail to create and run test cases that reflect your users' needs. From API testing with Postman to thorough web and mobile app testing, I ensure your product meets and exceeds expectations. My proactive approach in identifying, documenting, and tracking bugs ensures quick fixes and smooth collaboration with developers and support teams, enhancing product quality. 𝗣𝗿𝗼𝘃𝗲𝗻 𝗲𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲 𝗶𝗻 - Regression Testing - API Testing - User Acceptance Testing - Exploratory Testing - Ad-hoc Testing - Boundary Value Analysis - Black/White box Testing - Compatibility Testing - A/B Testing - End-to-end Testing - Performance Testing and many more 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗲𝗱 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻 🤖 4+ years of experience in Automated Testing in companies such as 𝗩𝗠𝘄𝗮𝗿𝗲, 𝗣𝗶𝗰𝘀𝗮𝗿𝘁, and 𝗟𝗮𝘆𝗲𝗿𝗶𝘀𝗲. In automation, I excel at crafting custom solutions to make web and mobile platform testing more efficient. I focus on maintaining and enhancing a robust test framework to quickly identify and resolve issues, boosting product quality. I'm dedicated to continuous improvement and collaborating with teams to not only meet but exceed standards in test automation. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗧𝗼𝗼𝗹𝗸𝗶𝘁 🛠️ 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗹𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀: 5 years of experience in test automation using Java. Solid understanding of OOP. Working experience in C#, Python, and TypeScript. 𝗧𝗲𝘀𝘁 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: 4+ years of experience in Selenium, Appium, TestNG, and JUnit. 1 year of experience in Cypress.io and Playwright automation. 𝗔𝗣𝗜 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: 4+ years of API testing with Postman, RestAssured, and Blazemeter. 𝗖𝗜/𝗖𝗗: Experienced in Jenkins and TeamCity for CI/CD pipelines. 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗧𝗼𝗼𝗹𝘀: Proficient with JIRA/Confluence, Linear.app, Bugzilla, TestRail, and Qase.io for task and test management. 𝗩𝗲𝗿𝘀𝗶𝗼𝗻 𝗖𝗼𝗻𝘁𝗿𝗼𝗹: Versed in Git and Perforce. 𝗕𝘂𝗶𝗹𝗱 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Working experience with Maven, Gradle, and Apache Ant. 𝗔𝗱𝗱𝗶𝘁𝗶𝗼𝗻𝗮𝗹 𝗿𝗲𝗮𝗱𝘆-𝘁𝗼-𝘂𝘀𝗲 𝘁𝗼𝗼𝗹𝘀: Working experience with TestRigor, Reflect.run, and Rainforest 𝗠𝗲𝘁𝗵𝗼𝗱𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Agile, Waterfall and V-Model ┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅ ⭐️⭐️⭐️⭐️⭐️ 𝗔𝗱𝗮𝗺 𝗳𝗿𝗼𝗺 𝗣𝗲𝗲𝗿𝗦𝘁𝗿𝗲𝗮𝗺 "Do not hesitate to work with Sargis, he is a skilled QA engineer and more than that is a great team player who immediately was able to plug into our team and be productive. He was a good communicator and documented his work well and everyone here enjoyed working with him. If the opportunity were to present itself we would glady work with him again - do not hesitate to use him for your project." ┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅ ⭐️⭐️⭐️⭐️⭐️ 𝗟𝗼𝘂𝗶𝘀 𝗳𝗿𝗼𝗺 𝗗𝗶𝗻𝗴𝗗𝗼𝗻𝗴𝗔𝗽𝗽 "Sargis was very detail oriented and precise. He is very good at understanding systems, finding bugs, and detailing what needs to be fixed. I'd highly recommend him." ┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅
    vsuc_fltilesrefresh_TrophyIcon Java
    Software QA
    Test Automation Framework
    CI/CD
    Selenium
    Quality Assurance
    Functional Testing
    Manual Testing
    Postman
    Bug Tracking & Reports
    Appium
    Regression Testing
    API Testing
    Mobile App Testing
    Web Testing
  • $30 hourly

    • 5.0/5
    • (5 jobs)
    Hello! My name is Jason and I am a student at York University studying Computer Science. My past jobs have mainly been focused on Shopify web development, creating and managing Shopify stores. Through other experiences and ones here on UpWork, I am currently proficient with the following: • HTML/CSS • JavaScript (React.js) • Bootstrap • Python (Flask/SQLAlchemy/SQLite) • Shopify Liquid • Shopify Store Editor (General Shopify) If you are interested in working with me shoot me a message and I'll be glad to work with you!
    vsuc_fltilesrefresh_TrophyIcon Java
    SQLAlchemy
    Flask
    Shopify Theme
    Product Research
    JavaScript
    React
    SQLite
    Python
    CSS
    Shopify
    Web Design
    HTML5
    Shopify Templates
    Liquid
  • $25 hourly

    • 4.6/5
    • (3 jobs)
    Full Stack developers experienced in building custom web applications. Also belongs to developers in one of the top IT solutions company. I deliver high quality solutions and customer satisfaction is our highest priority.
    vsuc_fltilesrefresh_TrophyIcon Java
    Ecommerce Website Development
    MySQL
    HTML
    Node.js
    Shopify
    HTML5
    CSS
    Wix
    Spring Boot
    Web Design
    AngularJS
    Scrapy
    Beautiful Soup
    SQL
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