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Hire the best Backend Rest API Freelancers in Brazil

Check out Backend Rest API Freelancers in Brazil with the skills you need for your next job.
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  • $50 hourly
    • 5.0/5
    • (47 jobs)
    I have been working as a System Developer and Solution Researcher since 2009. With my experience with api integration, script languages like python, javascript and no code development (zapier, integromat, bubble) I can help companies to quickly automate repetitive proccess and create time for the employees to focus on what really matters. More than 70 jobs succesfully completed as a freelancer worldwide. Around 7 years of experience on remote work. My main skills are API integration and process automation. I have extensive experience with Google Apps Script, Gmail API, Google Sheets API and Google Forms also integrating with different APIs. Additionally, I have worked with Zapier, implementing custom Python code, and more complex zaps using paths, filters, loop. Knowledge on other automation tools like make.com. I also have experience with C, C++, C#, Java, JavaScript, PHP, HTML5, CSS, MySQL, game programming, Python, web scraping, and Django.
    Featured Skill Backend Rest API
    Scripting
    Make.com
    Google Apps Script
    Python Script
    Web Services Development
    Google Docs
    Zapier
    Automation
    Google Sheets
    API
    RESTful API
    Web Development
    HTML
    Django
    API Integration
  • $15 hourly
    • 5.0/5
    • (6 jobs)
    Hi! I'm a Full-Stack Web Engineer with more than 6 years of professional experience. I have extensive experience with TypeScript, Node.js, and React. Additionally, I’m actively getting into Rust and Swift. I have experience working across a variety of environments, including startups, small and large companies, as well as freelance projects. I easily adapt to different team dynamics, workflows, and business scales. I am fluent in English, with strong communication skills. ✅ About my approach: I write code that is both easily understandable and performant. I prevent code complexity and keep designs scalable and maintainable. I stay up-to-date with the latest technologies, integrating them into my work to enhance problem-solving and development efficiency. I have experience with different kinds of projects—teams with 100+ people and small startups. I have developed basic front-end applications such as admin views, account views, landings, real-time chat apps, Telegram mini-apps (high-load real-time crypto clicker), a small crypto trading platform, and worked a bit with smart contracts and web scraping with Puppeteer. I can work with almost anything—if I don’t have experience with a particular technology, it’s not a problem for me to learn it quickly. I’m a shell user, primarily using Linux and Neovim in my job. I enjoy both for their performance. Here are more details about my stack: MacOS; Linux - mostly Debian, Ubuntu, and Kali Shell scripts (I have repos with shell scripts for the automated setup of my Linux machine) Neovim - custom setup with Lua Object-Oriented Programming, Functional Programming TypeScript, Node.js, HTML, CSS, PHP, and Rust Git Methodologies - SOLID, DRY, KISS, YAGNI REST, WebSockets JavaScript Stack: Node.js (+nvm), Bun (also yarn and pnpm) ECMAScript 6+ standards TypeScript React, NestJS Vite, Webpack, Monorepos with yarn and pnpm workspaces, and turborepo socket.io yup, zod animejs, react-spring eslint, stylelint, prettier, biome Jest, Vitest, Cypress Other libraries like lodash, d3, ramda, dayjs, date-fns, collect.js, and more. React Stack: React Hooks React Query, Axios, rtk-query React Router Dom, Tanstack Router Zustand, Jotai, Redux Toolkit react-hook-form react-three-fiber, react-three/drei, react-spring/three Next.js Styles: Tailwind, CSS Modules, styled-components, tss-react, stitches.js dnd-kit Backend Stack: PHP - Laravel Node.js - NestJS, Express, Hono (for Bun.js), Prisma Rust - Tokio, Axum, Tokio-Tungstenite MySQL, MongoDB, MariaDB, PostgreSQL, CockroachDB, Cassandra, TypeSense, Redis SQL, CQL Rust Stack: Tokio, Tower Axum Tokio Tungstenite Serde, Rmp, Rmp Serde and other utility libraries
    Featured Skill Backend Rest API
    macOS
    SQL
    MongoDB
    Bash
    Linux
    Rust
    NestJS
    ExpressJS
    RESTful API
    GraphQL
    CSS
    HTML
    Node.js
    TypeScript
    React
  • $30 hourly
    • 5.0/5
    • (10 jobs)
    As a full-stack developer, my role encompasses all phases of software development, from conception to implementation, spanning mobile platforms such as Android and iOS, as well as the web. I have expertise in modern technologies, such as Flutter for mobile development, utilizing the Dart language and Clean Architecture. On the frontend, I am responsible for creating attractive and functional user interfaces, while on the backend, I employ technologies like NestJs, Typescript, and JavaScript, following the principles of Clean Architecture. I have a solid understanding of databases, working with both SQL and NoSQL, including Mongo and Postgres. My experience extends to cloud services integration, using Firebase and AWS, to ensure a robust and scalable infrastructure. Additionally, my role includes the implementation of solutions in Cloud Services, providing a complete user experience. As part of full-stack development, I take responsibility for the entire software development lifecycle, adapting to emerging technologies and diverse platforms. The application of Clean Architecture and the careful selection of technologies ensure the delivery of high-quality solutions. In summary, as a full-stack developer, I efficiently integrate various technologies to create robust and innovative applications, both for mobile and web, maintaining a constant focus on backend efficiency and user experience.
    Featured Skill Backend Rest API
    MySQL
    NestJS
    Firebase
    User Authentication
    RESTful API
    In-App Purchases
    GraphQL
    Dart
    Firebase Cloud Firestore
    Flutter
  • $25 hourly
    • 5.0/5
    • (8 jobs)
    Developer Salesforce, Node JS and Python. Website creation. Visualforce and LWC. Salesforce Data Enrichment and Cleanup Data migration between systems (custom extraction, transformation and load scripts ) Community Sites (Experience Site) Salesforce REST APIs . Webhook and Api Salesforce. Knowledge of Apex and Test Classes. Knowledge of Python and application debugging. knowledge of Git and Salesforce deployment processes. I am proficient in manipulating databases and learn new technologies quickly. Query developer and ETL knowledge for data migrations Mastery in the use of Generative AI 'Chat GPT' and Gemini to assist in complex algorithms.
    Featured Skill Backend Rest API
    Sitebuilder
    Visualforce
    Data Migration
    Salesforce Service Cloud
    Salesforce Lightning
    RESTful API
    VB.NET
    Apex
    JavaScript
    Salesforce
    .NET Core
    Node.js
    Salesforce App Development
    Oracle
    MySQL
  • $50 hourly
    • 5.0/5
    • (3 jobs)
    I'm a Computer Scientist and Full Stack Web Developer with 2 years of experience, mainly in Python and Django. I can help you with: - Websites (custom-crafted and built on CMS) - Web applications - Scripts (automation, web scraping and web crawling) - Data Structures - Algorithms Technologies I am working with: Backend ✔ Python (Django, Django REST Framework, Flask, FastAPI, Celery). ✔ Restful API (Django REST Framework) ✔ PostgreSQL ✔ Golang ✔ RabbitMQ ✔ Docker Front-End ✔ HTML5/CSS3(W3C standard); ✔ Javascript (React JS, Node.js, Ajax, jQuery); ✔ Front-end frameworks (Bootstrap, Tailwind CSS, etc.) Have any questions? Send me a message. With the UpWork App I'll stay in touch with you :)
    Featured Skill Backend Rest API
    Algorithm Development
    RESTful API
    Django
    Data Structures
    Computer Science
    HTML
    JavaScript
    API
    Python
    PostgreSQL
  • $50 hourly
    • 5.0/5
    • (3 jobs)
    Hello, I'm professional web developer (Back-end + Devops) with over 7 years of programming experience. I have a knowledge how to bring your business idea to secure reliable successful web application. ✔️ Over 7+ years of IT Experience in design, development, testing and implementation of various stand - alone and client-server architecture based enterprise application software in Python on different domains. ✔️ Good experience in developing web applications implementing Model View Control architecture using Django and Rails web application frameworks. ✔️ Experience in Object Oriented Analysis in developing server side and front-end framework using various design patterns. ✔️ Skilled experience in Python with proven expertise in using new tools and technical developments (libraries used: libraries- Beautiful Soup, Jasy, numpy, Scipy, matplotlib, Pickle, PySide, python-twitter, Pandas dataframe, networkx, urllib2, MySQL dB for database connectivity) to drive improvements throughout entire software development lifecycle. ✔️ 7+ years of experience as Full stack developer. ✔️ Having experienced in Agile Methodologies, Scrum stories and sprints experience. ✔️Good experience in working with data analytics, data wrangling and Excel data extracts in a Python based environment. ✔️ Experienced in working with server side technologies including databases, restful API and MVC design patterns. ✔️ Special skills in development of effective, user-friendly web applications. Experienced in requirement gathering, Use case development, Business Process flow, Business Process Modeling: extensively used UML to develop various use cases, class diagrams and sequence diagrams. ✔️ Knowledge in working with continuous deployment using Heroku and Jenkins. ✔️ Knowledge about setting up Python REST API Frame work using Django. ✔️ Having good knowledge in using NoSQL databases like MongoDB (2.6, 2.4), Orient DB. ✔️ Good experience in working with Amazon Web Services like EC2, Lambda, Cloudfront, Virtual private clouds( VPCs ),Storage models( EBS,S3,instance storage ), Elastic Load Balancers(ELBs .) ✔️ Performed numerous server migrations on both Linux and Windows servers. Migrations include moving all clients and their data, configuration settings, testing and verifying. ✔️ Documentation of Architecture, Design and Operational procedures. ✔️ Experience in working with Python ORM Libraries including Django ORM, SQLAlchemy. ✔️ Experience in Test Driven Development and Behavior Driven Development methodologies for consulting firms and enterprise projects. ✔️ Good idea about testing tools like Bugzilla, and JIRA. ✔️ Thorough knowledge in various front end tools like HTML, DHTML, CSS, JavaScript, XML, JQuery, Angular JS, and AJAX. ✔️ Strong development experience on Linux based operating systems (used flavors like Debian, CentOS, Red Hat and Ubuntu). ✔️ Excellent Interpersonal and communication skills, efficient time management and organization skills, ability to handle multiple tasks and work well in a team environment. Feel free to contact me with questions. Good luck on your project! Best regards -Rennan Francisco Barbosa Costa
    Featured Skill Backend Rest API
    MySQL Programming
    PostgreSQL Programming
    AWS Lambda
    RESTful API
    DevOps
    Django
    AngularJS
    React
    Ruby on Rails
    Python
  • $55 hourly
    • 5.0/5
    • (13 jobs)
    My name is Rodrigo Wippel and I am a tech-savvy and highly-analytical professional with substantial experience in software engineering and application development. Throughout my career, I have developed solid skills and achieved out-of-the-box results. • Repeated success in supervising and leading engineering teams, and developing solutions for various technical problems. • Deft at designing and launching high-quality projects; enhancing end-user experience. • Stellar record of creating product specifications and features as per customers’ needs. • Excel at determining operational feasibility through analysis, problem definition, requirements, and solution development. • Employee recognizes me as a visionary leader with expertise in leading, mentoring, and coordinating staff, through effective management of organizational diversity. Technical Proficiencies: JavaScript, Typescript, Node.js, React, React Native, GraphQL, Apollo, Next.js, Express/API REST, tRPC, Tailwind, Jest, Cypress, Docker, AWS, Digital Ocean, Strapi / CMS Headless, MongoDB, Postgres, and more to build end-to-end solutions. My areas of expertise include: ♦ Website & Application Development ♦ Backend & Full-stack Development ♦ Mobile App Creation ♦ Technical Troubleshooting ♦ Product Development & Analysis ♦ Strategic Planning & Execution ♦ Team Leadership & Mentoring Feel free to reach out to me via email @ developer@rodrigowpl.com.
    Featured Skill Backend Rest API
    Tailwind CSS
    RESTful API
    DigitalOcean
    Apollo.io
    Next.js
    Jest
    JavaScript
    MongoDB
    TypeScript
    PostgreSQL
    React Native
    GraphQL
    React
    Node.js
    Amazon Web Services
  • $50 hourly
    • 5.0/5
    • (5 jobs)
    🌟 Projects delivered with up to a 70% reduction in operational costs. ⏱️ Refactoring that improved performance by 50%. 🥇 Top 3% of Upwork Talent. 🏆 10+ years of Backend Developer experience. My clients received error-free scalable and highly effective software solutions, boosting their business efficiency and profitability. This not only gives them a competitive edge but also paves their way towards becoming market leaders. 𝐍𝐞𝐞𝐝 𝐞𝐟𝐟𝐞𝐜𝐭𝐢𝐯𝐞, 𝐇𝐢𝐠𝐡-𝐈𝐦𝐩𝐚𝐜𝐭 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬? 𝐇𝐞𝐫𝐞'𝐬 𝐰𝐡𝐚𝐭 𝐈 𝐜𝐚𝐧 𝐨𝐟𝐟𝐞𝐫: ✔️ API development for seamless connection and usage across platforms. ✔️ API integration with any third-party solutions. ✔️ Tailor-made systems from the ground up for automating business processes. ✔️ Custom infrastructure based on cutting-edge technologies to transform your ideas into reality and meet your business requirements. ✔️ Highly scalable database structures. ✔️ Real-time log analytics with commercial/custom dashboards. ✔️ CI/CD to automate your workflow from commit, testing, deployment, notification, and more. ✔️ Comprehensive testing across all project domains, encompassing all use cases, edge cases, and complete end-to-end scenarios. 𝐈 𝐜𝐚𝐧𝐧𝐨𝐭 𝐡𝐞𝐥𝐩 𝐞𝐯𝐞𝐫𝐲𝐛𝐨𝐝𝐲, 𝐛𝐮𝐭 𝐰𝐞 𝐦𝐚𝐲 𝐛𝐞 𝐚 𝐠𝐫𝐞𝐚𝐭 𝐟𝐢𝐭 𝐢𝐟 𝐲𝐨𝐮 𝐚𝐫𝐞 𝐭𝐡𝐢𝐧𝐤𝐢𝐧𝐠: ● "I need a solution that I can trust 100% to solve our problems RIGHT.” ● "We have ambitious goals and need a solution architect who can build scalable solutions to match our growth.” ● "I'm not satisfied with out-of-box applications. We need an expert who can build custom applications to meet our requirements.” ● "We're willing to invest in premium solutions that adhere to the highest industry standards. That’s why we need the BEST developers who place a premium on quality.” 𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐰𝐢𝐭𝐡 𝐦𝐞, 𝐲𝐨𝐮 𝐰𝐢𝐥𝐥: ✔️ Save your money by getting clean, efficient code that is easy to read, understand, and extend for any future needs your business might have. A well-known fact is that a well-developed and SOLID principals-based application is much cheaper and faster to expand and modify than developing a new one from scratch whenever business requirements change. ✔️ Get support and warranty on all delivered projects. ✔️ Have a reliable and committed partner that guarantees tasks are executed flawlessly, punctually, and in the most effective manner. ✔️ Focus on more important tasks without distractions, as I handle your technical problems and challenges. ✔️ Witness rapid business expansion through advanced technology solutions customized to your company's needs. 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 & 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐊𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞: 🔸 Backend Development: NodeJS, NestJS, Express, Fastify 🔸 Frameworks & Testing: Prisma, Jest, Passport, ESLint 🔸 Programming: JavaScript, TypeScript 🔸 Infrastructure as Code: Terraform, CloudFormation 🔸 API Development & Integration: RESTful, GraphQL, Google APIs, Stripe 🔸 SQL Management: PostgreSQL, MySQL, RDS 🔸 NoSQL Management: MongoDB, Redis, DynamoDB 🔸 Compute & Serverless: Lambda, EC2, API Gateway 🔸 Authentication & Authorization: Cognito, Auth0 🔸 Messaging & Notification Services: SES, SQS, SNS, EventBridge, AWS Chatbot 🔸 Storage & Content Delivery: S3, Amazon Location Service, Route 53, CloudFront 🔸 Networking & Security: VPC, IAM, KMS, Parameter Store 🔸 Monitoring & Data Analytics: CloudWatch, X-Ray, Athena, Amazon QuickSight 🟢 𝐑𝐞𝐚𝐝𝐲 𝐭𝐨 𝐓𝐚𝐤𝐞 𝐭𝐡𝐞 𝐍𝐞𝐱𝐭 𝐒𝐭𝐞𝐩? Let's connect! I'm passionate about employing my expertise to drive your project to new heights. Send me a message to explore how we can achieve groundbreaking success together.
    Featured Skill Backend Rest API
    API Development
    Amazon Web Services
    TypeScript
    JavaScript
    API
    Node.js
    RESTful API
    NestJS
    ExpressJS
    Serverless Computing
    Back-End Development
    DevOps
    Solution Architecture
  • $35 hourly
    • 5.0/5
    • (109 jobs)
    I'm a full-stack WordPress developer. I specialize in custom plugin and theme development, page speed optimization, and fixes in general. I prioritize writing clean, modular, and secure code that is optimized for performance and maintainability. 🌎 Fluent in English
    Featured Skill Backend Rest API
    WordPress Development
    RESTful API
    HTML
    PHP
    WordPress e-Commerce
    React
    API
    WordPress Multisite
    WordPress Theme
    JavaScript
    WordPress Consultation
    Bug Fix
    WordPress
    CSS
  • $50 hourly
    • 5.0/5
    • (13 jobs)
    Computer engineer and Java developer with 12 years of experience. Involved in all facets of software development life cycle, from analysis and design to implementation and maintenance.
    Featured Skill Backend Rest API
    Test Strategy
    NoSQL Database
    Cloud Computing
    Continuous Integration
    Agile Software Development
    Python
    Java
    SQL
    Spring Framework
    RESTful API
  • $35 hourly
    • 5.0/5
    • (4 jobs)
    I am very keen on writing python code. I enjoy working with backend projects, machine learning, automation and data analysis.
    Featured Skill Backend Rest API
    Scripting
    Data Scraping
    Analytics Plugin
    RESTful API
    Back-End Development
    Python
    Data Science
  • $45 hourly
    • 5.0/5
    • (3 jobs)
    With more than 10 years of experience, I went from working by myself with technologies that I was comfortable with to tasks across different teams worldwide with stacks that I seldom used... I developed the FRONT-END for web apps using React, Angular and AngularJS. Worked as a BACK-END engineer with Java, NodeJS, asp.net(C#) and python. MOBILE-DEVELOPMENT with React Native including Android specific features in an "offline first" asset tracking application. Configured the basic INFRA-STRUCTURE for many projects including containers with Docker and clusters with Kubernetes. Good experience with the AWS environment. I also can handle different types of DATABASES. There were cases in which applications were struggling to complete requests when using relational databases and I got amazing results by migrating/caching specific parts of them to a better fit such as DynamoDB, Redis and MongoDB for those cases. I know good strategies to reduce costs and boost performance with CACHE and COLD STORAGE for major projects. With strong fundamentals, I am very resilient and I will be happy to help you.
    Featured Skill Backend Rest API
    JavaScript
    Node.js
    Redux
    Mobile App Development
    Front-End Development
    Infrastructure Management
    React
    Software Development
    RESTful API
    Software Architecture & Design
  • $50 hourly
    • 5.0/5
    • (13 jobs)
    My job is to technically help startups with promising business models to overgrow and to support startups that have problems with their systems to stabilize and be able to overgrow. Some examples: Rock Real Estate Investments Joyz Donations. ABS Telemetry Bora Transport Iplenix Internet Services - Founder Terra Networks Brasil SA Director of Engineer My work covers a wide range of technical management activities within the company, ranging from the selection of the technological development and DevOps team to the management of the teams, including the definition of the systems architecture and software development, operationalization, and support of the systems. The most successful startup I've been participating in was Terra Networks. I participated in the creation while it was still called NutecNet. We started from scratch and reached millions of users. I set up the entire development and operation team for the services as Director and Principal Architect. When Terra Networks bought the company, I started a new role as a manager of a multinational technical team with people in several countries like the United States, Spain, Mexico, and Brazil. Specialties: * build and management of systems development and DevOps teams * systems architecture * software development * DevOps. There are some ways to hire my services: * For short projects, hiring is done with value and results defined before the start. - longer tasks are contracted by: - hours of monthly dedication - profit-sharing, or by royalties - Participation in the company
    Featured Skill Backend Rest API
    Network Administration
    Firmware Programming
    OpenWrt
    Python
    Linux
    Multithreaded Programming
    SQL
    Python Asyncio
    Team Management
    Websockets
    Linux System Administration
    Scripting
    RESTful API
    Socket Programming
  • $45 hourly
    • 4.9/5
    • (4 jobs)
    Hi, I’m a software engineer with over 15 years of experience in backend, frontend, mobile and database development. I specialize in building scalable and maintainable applications to address diverse business needs across multiple platforms. Currently specializing in no-code/low-code tools and AI for faster and smarter development. • Flutter Development: 5 years of professional experience with Flutter, implementing Firebase services (Authentication, App Check, Firestore, Functions, Messaging, Remote Config, Dynamic Links, Analytics, and Crashlytics). Expertise in Clean Architecture, MVVM, MVC, TDD (unit, widget, and integration tests), and state management libraries (GetIt, BLoC, Cubit, Hooks, Riverpod, MobX, ChangeNotifier). Skilled in creating white-label apps, internationalization, custom themes, design systems, micro frontends, and app publishing with Fastlane. • App Deployment & CI/CD: Experienced in publishing apps on Google Play Store (Android) and Apple App Store (iOS), including implementing CI/CD processes for streamlined deployment. • Full Stack Development: Over 10 years of professional experience with Java (Spring), .NET (C#, Core, MVC), Node.js (NestJS), Angular, Vue.js, and React. • Service-Oriented Architecture: Solid experience in SOA integration, consuming REST and SOAP APIs, and developing microservices. • Database Expertise: Extensive experience in database modeling (OLTP and OLAP), ETL processes, query optimization, procedure, and jobs programming. Proficient with SQL databases (SQL Server, Oracle, PostgreSQL, MySQL) and NoSQL databases (MongoDB).
    Featured Skill Backend Rest API
    Docker
    Python
    Database Modeling
    RESTful API
    GraphQL
    Node.js
    Flutter
    Firebase
    React
    Java
    ETL
    Angular
    .NET Framework
    Vue.js
  • $35 hourly
    • 5.0/5
    • (17 jobs)
    Leveraging expertise in crafting cutting-edge technological solutions for diverse industries such as steel and mining, encompassing maintenance, logistics, and operations. Highly skilled in agile methodology to create dynamic software for digital products. Demonstrating a comprehensive understanding of IoT solutions, including hardware, firmware, telecommunications, and cloud services. Repeatedly acclaimed for innovation, dedication, and fostering positive relationships within professional settings.
    Featured Skill Backend Rest API
    Amazon S3
    Amazon API Gateway
    AWS IoT Core
    Internet of Things
    ESP32
    RFID
    Internet of Things Solutions Design
    LoRa
    AWS Lambda
    Grafana
    RESTful API
    Industrial Internet of Things
    Internet of Things Software
    PostgreSQL
    Python
  • $50 hourly
    • 5.0/5
    • (15 jobs)
    As a data and blockchain/web3 professional, I have been involved in many on-chain analytics projects. I've collected prizes and awards from bounties, and data challenges. Also have worked as a data analyst at web3 startups with international remote teams. Please check out my public projects portfolio.
    Featured Skill Backend Rest API
    Web3
    Plotly
    Database
    Git
    Blockchain, NFT & Cryptocurrency
    Data Mining
    Google Cloud Platform
    PDF Conversion
    RESTful API
    Data Science
    Data Analysis
    Statistical Analysis
    SQL
    Python
  • $36 hourly
    • 5.0/5
    • (3 jobs)
    I am a software developer with 17 years of experience, using technologies such as: Delphi, PHP, Postgres, Firebird, GiT, SVN. I've also worked with Dataflex, Visual DataFlex and PowerBuilder, but in the last 10 years, I've been more focused on the technologies of Embarcadero Delphi (7, 10.x), in particular, development of API Rest application servers with technologies such as Datasnap and TMS Aurelius (ORM). Of these projects, 15 years of management were for projects in the management area public, in particular: Accounting, Tax, Legal (Attorneys). I also worked on parallel projects, in the areas of industry and business. Competence in managing the software development cycle, identification of need or scope, survey requirements, software architecture, diagram design streams(Bpmn), code, application testing and documentation technique. In recent years, I have been working especially with software integration using RestFull tecnology
    Featured Skill Backend Rest API
    API Development
    SQL
    JSON
    XML
    SOAP
    OAuth
    Delphi
    HTML
    RESTful API
    PostgreSQL
  • $50 hourly
    • 5.0/5
    • (1 job)
    Software Engineer, high skilled in .NET framework (C#, ASP.NET), NodeJS, Javascript, Java, cloud-based applications, software engineering and architecting, building and delivering new softwares, enhancing existing ones with the most modern patterns found nowadays, with scalability and reliability. Team leadership, Guild leadership and scrum master competencies in OSS/BSS solutions. Running sprints in an Agile environment, supporting the Product Owners and focusing on maximum quality and incremental deliveries of the products.
    Featured Skill Backend Rest API
    JavaScript
    C#
    Amazon Web Services
    Database Architecture
    Cloud Computing
    .NET Framework
    Node.js
    MySQL
    Software Architecture & Design
    Continuous Integration
    RESTful API
    PostgreSQL
    Elasticsearch
    Tech & IT
    Google Cloud Platform
    Java
  • $35 hourly
    • 5.0/5
    • (3 jobs)
    Software developer with 9 years of backend and api experience with Java and other languages such as python and node. Strong team player skilled in communicating and collaborating.
    Featured Skill Backend Rest API
    Postman
    RESTful API
    Python
    Java
    SQL
    Flask
    Spring Boot
    Docker
    Microservice
    Git
    Node.js
    Jenkins
  • $50 hourly
    • 5.0/5
    • (7 jobs)
    Profile I'm a Lead Software Engineer with 15 years of experience working on a variety of projects. I'm a specialist in Web Development using React in the frontend and Java in the backend, using relational and no-sql databases. I hold a Bachelor's Degree in Computer Science and have experience working with small to big companies building complex web based solutions. For me tests are really important, and I have vast experience working with unit tests using tools such as JUnit, Jest and Cypress. I'm skilled at communicating with the diverse parties involved in the development process to efficiently solve problems. I usually help other engineers to increase their productivity by teaching or training new methods of solving problems. I'm passionate about my work and adapt quickly to new technologies, constantly looking to improve and learn. My experience allows me to get involved in the full development process from planning to deployment.
    Featured Skill Backend Rest API
    Spring Cloud
    RESTful API
    Redux
    PostgreSQL
    Spring Boot
    MySQL
    GraphQL
    React
    Java
    MongoDB
  • $45 hourly
    • 5.0/5
    • (1 job)
    Software Engineer with 4 years of experience in front-end development focused in typescript, react and NextJs. I work closely with product, UX, and other engineers to deliver the best possible product with the resources available, always thinking of the big picture and the impact on the user. Accustomed to fast-paced environments with dynamic goals. I've worked with small teams and startups for most of my career and I enjoy it. I've led small teams of frontend engineers to deliver full webapps from in tight deadlines, satisfying all major requirements while maintaining good levels of code quality and performance.
    Featured Skill Backend Rest API
    Specifications
    GraphQL
    RESTful API
    Software Development
    React
    Responsive Design
    JavaScript
    Redux
    Next.js
    Web Application
    CSS 3
    CSS
  • $40 hourly
    • 5.0/5
    • (1 job)
    Hello there! I'm an ex-Amazon software engineer with 5+ years of market experience and an ever-growing passion for clean, maintainable code that scales. What I can make for you: - Great AWS infrastructure, including beautiful Lambdas with API integrations, SQL and DynamoDB databases, pipelines with SQS, Kinesis, Step Functions, etc. - All-purpose, multi-language scripting with automation, REST, GraphQL and other integrations. - Code refactoring and tests for maintainable projects in Python, Java, C#, Kotlin, Javascript, Golang, etc. - System Design for architectures that scale - Games! I have a bunch of experience with Unity3D and can help with the development process. - Mentoring and helping you get to the next level in the software industry. There are probably a bunch of other things I can help with as well, so absolutely reach out and let me know!
    Featured Skill Backend Rest API
    Unit Testing
    Scripting
    AWS CloudFormation
    API
    Unity
    GitHub
    RESTful API
    AWS Lambda
    Golang
    JavaScript
    Kotlin
    C#
    Java
    Amazon DynamoDB
    Python
  • $45 hourly
    • 5.0/5
    • (3 jobs)
    7 year data experienced professional at finance, health, tech, consulting and banking experience. A challenge and problem solving driven professional and have always had as a goal the fusion of data technology and capital markets. Pursuing to contribute and grow within a fast-paced environment on innovative projects. Currently Senior Data Platform Engineer and finishing master’s degree in Computer Science at UFMG. Projects: Throughout my career, I've been involved in many exciting projects, such as developing GAN and binary investment robots for investment algorithms, reconciling financial data for large companies, and statistically analyzing stock trading volume using Google Trends. My projects demonstrate my ability to combine AI models, quantitative analytics and financial expertise to gain data-driven insights. Skills: I have diverse skills in programming languages such as Python, Javascript, R, C/C++, SQL, Typescript, Scala and VBA. I have hands-on experience with various databases such as SQL Server, PostgreSQL, DB2, MySQL, MongoDB, Google Big Query, Oracle, AWS and Microsoft SSIS. In addition, I have knowledge in data visualization tools, such as Shiny, Matplot, Tableau, PowerBI and Google DataStudio. Languages: I am a native Portuguese speaker and proficient in English and Spanish, which enables efficient communication with international teams.
    Featured Skill Backend Rest API
    Node.js
    React
    JavaScript
    Amazon Redshift
    AWS Lambda
    Data Science
    Data Engineering
    RESTful API
    Finance & Accounting
    Statistics
    Business Plan
    Oracle Cloud
    SQL
    R
    Python
  • $32 hourly
    • 5.0/5
    • (3 jobs)
    Hi! My name is Filipe Muniz.I'm a Senior Game Programmer I have 7+ years under my belt in the game industry. About 5 years of Unity and a 2+ years in Unreal Engine. I've worn many hats, primarily as Lead Programmer. My journey has also seen me delve into game design, level design, and UX/UI design. But in those other situations, I was working as a solo dev. I also developed and maintained automated testing and a few custom editor tools to help development. And I also worked with animation editing inside Unreal, particularly with ALS v4.  
    Featured Skill Backend Rest API
    Unreal Engine
    Unity
    Unit Testing
    UML Diagram
    API
    API Development
    RESTful API
    JavaScript
    C#
    C++
    CSS
    HTML
    RESTful Architecture
    Angular
  • $50 hourly
    • 4.9/5
    • (2 jobs)
    I’m a Python and AI expert with 8+ years of experience. I build custom software solutions, focusing on backend services, cloud solutions, big data, and AI. I’m great at integrating systems, using APIs, and web scraping with tools like Web Scrapy. I also work with CI/CD pipelines and create AI-driven solutions using Machine Learning and Large Language Models. I deliver high-quality, reliable results. Whether you’re starting something new or improving an existing system, I’m here to help you solve problems and make things work. Let’s get started!
    Featured Skill Backend Rest API
    Data Extraction
    ETL
    FastAPI
    RESTful API
    Django
    Flask
    Database Modeling
    TensorFlow
    LangChain
    AI Chatbot
    Deep Learning
    Machine Learning
    AI Development
    Artificial Intelligence
    Python
  • $54 hourly
    • 5.0/5
    • (6 jobs)
    Experienced Software Developer with 23 years of experience and background in developing, scaling, architecting, securing, and maintaining large-scale web applications, micro services, and APIs in highly critical environments, serving millions of users daily, for the financial, healthcare and telco industries. Technologies: - Java / Kotlin / C# / Golang / React.js / Vue.js - Spring boot, Spring Cloud, Spring Security, Spring Batch, JPA, Micronaut - Microservice / Clean Architecture / SOLID / Design Patterns - AWS / GCP - Docker / K8S - Postgres / MySQL / Oracle / SQL Server / MongoDB - Kafka / RabbitMQ / AWS SQS / AWS SNS / Cloud Pub/Sub - Tests (unitary / integration / E2E) - CI/CD (GitLab / GitHub / Jenkins) I consider myself a passionate problem solver and helping people is what motivates me. My focus is to deliver and add value to the company and product, despite any tech preference. I strongly believe that we must use the right tools to achieve success in our deliverables instead of using what we know. And if I do not know the best tool or approach to deliver it I would do my best to quickly learn something new to achieve the proposed goals. Working in a diverse and multicultural team is very important to me. We learn with each other on a daily basis and get better prepared to surpass any company goals each sprint. As a leader I strongly believe in the servant leadership style and I’m always pushing hard to learn and use my knowledge to inspire people and help everyone to achieve further paths in their careers and goals. A hands on professional that will always do whatever it's possible to make it happen: removing blockers, doing PoCs, discussing business requirements with stakeholders and always trying to facilitate the daily routine. In the past years I spent most of my time building 0 to 1 products, and working with unknown and ambiguity scenarios is something that I really love. I always try to learn and improve as fast as possible, my motto is "move fast and break things" and through this mindset I always build, test and deliver the best experience with focus on generating revenue.
    Featured Skill Backend Rest API
    Vue.js
    Amazon EC2
    API
    RESTful API
    Kubernetes
    PostgreSQL
    MongoDB
    SQL
    JavaScript
    Hibernate
    React
    MySQL
    Web Development
    Mobile App Development
    Java
  • $40 hourly
    • 5.0/5
    • (14 jobs)
    🚀 Distinguished Experience: With over 9 years in the tech industry, I have cemented my expertise with Node.js, Vue/React, TypeScript, and Golang, blending technical acumen with effective project management. My journey is marked by successful collaborations, happy clients, and a portfolio of proprietary high-quality software solutions. 💡 Specialized Skill Set: As a fullstack developer, I bring a robust skill set in both frontend and backend technologies. My proficiency in Node.js, TypeScript, Golang, Vue and React enables me to craft responsive, efficient, and scalable web applications. Whether it’s creating seamless RESTful services or diving into complex fullstack websocket projects, my approach is rooted in delivering excellence and innovation. I can also bring some AWS experience to the table, from the machines to DNS. 🔍 Commitment to Quality: "Good enough" is not in my vocabulary. I strive for perfection in every project, which drives me to explore unique and creative solutions. This mindset has led me to successfully plan and refine various systems, including emergency network platforms, sophisticated chat applications, IoT infrastructures, digital magazines, and VOIP services. My focus on quality assurance ensures that each endpoint is meticulously tested, guaranteeing reliable and fault-tolerant systems. 📈 Problem-Solving & Adaptability: Tackling challenges with an "out-of-the-box" perspective, I excel in delivering cost-effective and unique solutions that not only meet but exceed expectations. My experience in refactoring and optimizing systems speaks to my ability to transform ideas into tangible, high-performing software. 🔗 Effective Communication: I firmly believe that clear and prompt communication is the cornerstone of successful project execution. I am always available to discuss ideas, answer queries, and provide insights, ensuring that we are aligned at every step of the project. 🌟 Ready to Collaborate: Whether you are looking to build from scratch or enhance an existing system, I am here to bring your vision to life with my technical expertise and unwavering commitment to quality. Let's connect and embark on a journey to create software that stands out and delivers results!
    Featured Skill Backend Rest API
    API Development
    Twilio API
    SQL
    Database Design
    Websockets
    Database Architecture
    ExpressJS
    Redis
    Database
    Vue.js
    API
    JavaScript
    Golang
    RESTful API
    Node.js
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