Hire the best Backend Rest API Freelancers in Colorado
Check out Backend Rest API Freelancers in Colorado with the skills you need for your next job.
- $70 hourly
- 5.0/5
- (54 jobs)
I'm a developer with 8 years of experience in CRM application consulting and development. More recently, I have started using my development and creative skills to design, build and customize websites using Wix and Webflow. I’m an artist at heart and I have a passion for helping others to pursue their purpose and dreams. I have found my niche in designing and building websites for brands that are a clear reflection of their values, mission, and personality. I love to help a company uncover their unique style and essence and bring that to life in a website that allows their customers to have an accurate and compelling first impression, leading to an increase in business from their true, ideal client. • I'm experienced in Wix, Webflow, HTML, CSS, Handlebars, JavaScript, PHP, jQuery, MySQL, Gitlab, SugarCRM, Rest APIs, and other programming skills • I have experience in all stages of the project lifecycle including gathering requirements, designing and developing customizations, and offering post go-live support • I love working directly with clients and providing easy and direct communication throughout a project Please reach out if you'd like to begin the journey of building a website with me!Backend Rest API
Web DesignBrandingBrand DesignBranded WebsiteRESTful APIjQueryGitLabWebsite RedesignCSSJavaScriptHTMLPHPWebflowWixMySQL - $90 hourly
- 4.6/5
- (10 jobs)
For most of my over 10-year career, I've written and debugged a variety of software and have solved various types of problems. At Techno-Sciences, this was primarily software which handled communication between hardware devices with different protocols, and getting them to work together as a maritime surveillance unit. With Polycom, it was software which handled communication between Polycom's DMA and external hardware components such as phones, web services, and video conferencing devices. Then, with Spectra Logic, I wrote automated test code to debug communication between Spectra's backup software and various hardware storage devices, as well as cloud storage services such as S3. Next, with RK Mechanical, I programmed software to import product and price data from various APIs and data sheets and consolidate it. After that, with Exolvo Designs Group, I am enhanced software for a search-and-rescue antenna configuration system. And now, with Versity, I've done Golang programming for a data storage analysis tool and am currently doing bats testing for an AWS S3 gateway. In addition to my current contract at Versity, I'm open to freelance work in any field I find engaging, fields where I can put software together to solve problems and improve my knowledge. Skills: * bash/bats * Golang * github-actions * REST API * React.js * Docker * AWS * SQL Server * Python * MongoDB * Java * C++Backend Rest API
SeleniumMongoDBC++APIWeb DevelopmentRESTful APIMicrosoft SQL ServerPythonJavaScriptJavaReactGitDockerData ScrapingGolang - $100 hourly
- 5.0/5
- (5 jobs)
I'm a full stack developer with experience building software systems for both large enterprises and small companies. I'm always learning new things and I've gotten feedback that I come up to speed on new projects quickly. Some of my recent experience includes: - Maintenance and development on a logistics system using Java, Postgres, ECS, React, Python, and Terraform - Working with a design firm to reskin an existing Angular based web application - Maintenance and development of an SMS based messaging system for car dealership service departments using Rails, Postgres, Heroku, and AngularJS - Building new features for a content marketing application using React and Node.JS - Maintaining a data analytics pipeline in AWS using Hive, Athena, S3, Lambda and Python - Building a business intelligence platform from scratch using Ruby on Rails, PostgreSQL, AWS, and RabbitMQBackend Rest API
APILinuxMySQL ProgrammingPostgreSQL ProgrammingCloud ComputingRESTful APIMongoDBPythonAngularDockerBusiness IntelligenceReactJavaJavaScriptRuby on Rails - $40 hourly
- 4.6/5
- (6 jobs)
Hi there! I specialize in building robust applications and leveraging a diverse set of web technologies, programming languages, and front-end/back-end tools. 🌐 Technical Expertise: Front-End Development: JavaScript, React.js, Angular, Vue.js, jQuery, HTML, CSS3, Bootstrap Back-End Development: PHP, Laravel, CodeIgniter Microservices and Serverless: API, RESTful API, Docker, Swagger UI, Postman API, JSON Database Management: RDBMS, MySQL, phpMyAdmin UX/UI Web Design: WordPress, Material Design, Bootstrap Version Control: Git, GitHub, GitLab, Bitbucket Project Management: Agile Project Management, Scrum Server Side: Node.js, Apache HTTP Server, Linux, cPanel & WHM, Plesk, Webmin 🌟 Key Strengths: - Software Development: Proven expertise in developing high-quality software solutions. - Asynchronous Programming: Proficient in asynchronous programming techniques for optimal performance. - System Administration: Well-versed in server setup and maintenance for seamless operations. - Database Creation & Management: Skilled in designing and managing databases for efficiency. - Team Lead | Project Management: Experienced in leading teams and managing projects effectively. - Solutions Consultant: Adept at providing strategic solutions to complex challenges. - Code Review | De-Bugging: Meticulous in code review and proficient in debugging. - Problem-Solving: Known for solving intricate technical problems with creativity. - Takes Initiative: Proactive and driven, always ready to take the initiative. - Detailed | Organized: Attention to detail and organizational skills for streamlined workflows. - Collaborative: Strong collaborative skills for effective team integration. - Adaptable: Quick to adapt to new technologies and industry best practices. 🌐 Why Choose Me? With a deep understanding of JavaScript, HTML, CSS, Node.js, React.js, PHP, Laravel, and more, I bring both technical prowess and business acumen to the table. I thrive on embracing new technologies and implementing best practices to deliver unparalleled solutions. Let's collaborate and turn your ideas into reality! Looking forward to working together.Backend Rest API
React NativePostmanDockerReduxRESTful APIFunctional ProgrammingMySQL ProgrammingReactJavaScriptMicroserviceWordPressjQueryLaravelPHP - $98 hourly
- 5.0/5
- (5 jobs)
Salesforce Developer | Apex, LWC, Flows | Salesforce Certified Developer & Admin I’m a Salesforce Subject Matter Expert (SME) with 8 years of experience in Salesforce development, specializing in Apex, Lightning Web Components (LWC), and Flows. As a Salesforce Certified Developer and Administrator, I bring deep technical expertise in building scalable, high-performance solutions tailored to business needs. What I Offer: ✔ Custom Apex Development – Triggers, Batch Apex, Integrations, and Asynchronous Processing ✔ Lightning Web Components (LWC) – Custom UI development with high-performance architecture ✔ Salesforce Flows & Automation – Streamlining business processes with declarative and programmatic automation ✔ Salesforce Administration & Configuration – Security, Data Management, and Customization ✔ System Integrations – REST/SOAP APIs, External System Connections, and Middleware Solutions ✔ Salesforce Best Practices & Code Audits – Ensuring scalability, maintainability, and compliance I have worked with enterprise-level Salesforce orgs, ensuring data integrity, seamless automation, and high-quality development practices. Whether you're looking for custom development, automation improvements, or an expert to optimize your Salesforce platform, I’m here to help. Let’s discuss how I can add value to your project!Backend Rest API
SOQLApexRESTful APIMulesoftSalesforce App DevelopmentSalesforce Service CloudSalesforce Sales CloudSalesforce CRMSalesforce LightningSalesforce Marketing CloudSalesforce - $35 hourly
- 5.0/5
- (2 jobs)
I am a full time Ph.D. student studying systems and network security. I utilize my skills on the side to provide small businesses with a high value, reliable employee who has the experience they need at a price they can afford. I often utilize my full-stack development skills to help assist in improving web application infrastructure and feature development. The majority of my backend expertise lies in Python Flask and Django. I am also comfortable architecting PostgreSQL databases and deploying infrastructures to AWS. A majority of my day to day tasks include Python scripting for automation and bot creation. I can rapidly produce scripts for API interaction and sign up flow automation. I also right high performance classification tools in Rust for high memory performance and low processing overhead. Some of my portfolio projects include a network classifier capable of parsing network traffic at a rate of 100Gbps. Another recent project involved building a payments platform for gig workers from the ground up, integrating with Dwolla, Stripe, and Plaid. Additionally, I have been a part of the responsible disclosure of vulnerabilities in services provided by Baidu, Cisco and other. My security background allows me to provide you with a secure reliable product regardless of your tech stack. Let’s work together to make you project a reality!Backend Rest API
RESTful APIAmazon Web ServicesRustPostgreSQLDjangoPython - $75 hourly
- 5.0/5
- (1 job)
Your project is unique, and I understand that. I aim to ensure that I work with each of my clients to fully understand their requirements, constraints, and goals to deliver a superior product in the shortest possible time. Communication is everything, and I pride myself on being there for you! ▹ An experienced Full-stack / Web and Mobile Developer using React, React Native, TypeScript, Material UI, Tailwind CSS, and HTML to provide you with a pixel-perfect UI. ▹ Expert-level backend systems developer. I can build high-performance, secure, RESTful or GraphQL APIs in nodeJS, Go, or Python ▹ As an experienced data engineer, ETL, data ingestion, visualization, reporting, analysis, and modeling are not a problem. I'm happy to provide a solution. ▹ Need infrastructure? I can set up your compute, HTTP/API, database, network, notification, and instrumentation needs in a robust yet cost-effective manner on AWS. ▹ Want someone to talk to? I'm here for you. Let's discuss your ideas at any level - from high-level concepts to the details of choosing data structures and algorithms. Let's jump on a call and start building something great together!Backend Rest API
Microsoft ExcelAPIAWS DevelopmentReact NativeRESTful APIGraphQLPostgreSQLGolangPythonTypeScriptSQLReactWeb ApplicationNode.jsJavaScript - $40 hourly
- 3.3/5
- (3 jobs)
Innovative, energetic, and solutions-oriented Developer with extensive business experience. Proven track record of reducing operating expenses and increasing organizational efficiency and effectiveness. Skilled at defining strategic and operational objectives with executive management and executing the objectives organization-wide. Possess excellent communication, leadership, analytical and problem-solving skills with a strong focus on customer and employee satisfaction. Account Management Asset Management Budget Forecasting & Planning Contract / Vendor Management (on/offshore) DevOps CI/CD Mobile Device Management (MDM) Performance Management / Metrics Project / Program Management (Agile/SAFe) Service Desk / Technical Support Management Strategic Business Planning Systems Analysis System Administration & Monitoring ITIL® Management Disciplines (Application, Change, Event, Incident, Problem, Service-level, Release & Deployment, Supplier, etc.) EXPERIENCE ServiceNow Developer & Architect Boeing/Jeppesen, 2015 – Current The Lead Architect and Developer. Responsible for requirements gathering, implementation, "Go Live," and continued oversight and development of the ServiceNow Platform. Starting from the Dublin release to the current Rome release managing both onshore and offshore Developer Teams using Agile/SAFe Project Management. Developing custom configurations for Incident, Change, Problem, Release, Certificate, Supplier, Security, and Demand Management modules. The main Administrator for all Discovery and CMDB activities. Assist with Event Management and Service Mapping activities. Assisted in multiple integrations (e.g., AWS, Azure, Oracle, Nagios, AppDynamics, SCCM, Kubernetes, Salesforce, etc.) Collect, analyze and present monthly company product portfolio KPIs, application performance metrics, and SLAs to senior management. Assist Certificate Management in maintaining renewals and distributing new SSL Certificates. Assist in PagerDuty daily Administration and integration of users, groups, and business services between PagerDuty and ServiceNow. KEY ACCOMPLISHMENTS: Automated incident creation and support team paging from events or alerts via various applications or business services monitored by one or more following: Azure OMS/AppInsights, AWS, AppDynamics, Nagios, Microsoft SCCM, Kubernetes, and others. Completed the integration of the Oracle ERP System's HR employee and company customer databases to ServiceNow. Established real-time application (business service) availability/uptime metrics within the platform,mobile device alerting and status to senior leaders or critical stakeholders during a major incident. Created a Certificate Management renewal request form to gather multiple values and then updated the main workflow that would otherwise require user licensing. This module also resolved reoccurring customer-facing expired SSL certificates, which potentially caused major customer impact or operational delays. The key person in architecting the entire platform for the last six years. The primary Developer for most ITSM modules with custom configurations and numerous custom modules extended from existing ServiceNow tables. * Account Management * Asset Management * Budget Forecasting & Planning * Contract / Vendor Management (on/offshore) * DevOps CI/CD * Mobile Device Management (MDM) * Performance Management / Metrics * Project / Program Management (Agile/SAFe) * Service Desk / Technical Support Management * Strategic Business Planning * Systems Analysis * System Administration & MonitoringBackend Rest API
Angular 2RESTful APIEvent ManagementChange ManagementNagios CoreConfiguration ManagementMicrosoft ExcelIncident ManagementAgile Project ManagementServiceNowJavaScriptCSS 3HTML5 - $30 hourly
- 4.9/5
- (7 jobs)
Software Developer with 4-5 years of full-stack experience. I am passionate about bringing simple and effective solutions to complex business problems. Portfolio Site: eugenec.devBackend Rest API
Data StructuresVersion ControlRESTful APIGoogle Cloud PlatformTailwind CSSGraphQLNext.jsjQueryDockerPythonGitReactSQLNode.jsJavaScript - $125 hourly
- 0.0/5
- (0 jobs)
Experienced technology leader looking to have an impact on a company. 20 years of software engineering experience, across multiple languages and industries. Most recently, I have worked in rust, at a systems level, utilizing systems such as XDP or eBPF, or at a backend level, with GraphQL and Postgres. I have experience deploying either on premise or in the cloud, using methods like lambda functions or kubernetes. I have spent the last 5 years mentoring other engineers, helping them grow as well.Backend Rest API
Software TestingCloud ComputingRESTful APIAWS LambdaRustSQLGraphQL - $125 hourly
- 0.0/5
- (0 jobs)
I am a software engineering professional with broad and deep experience in a variety of environments, from startups to the largest of scales. I have built line of business website applications, data processing pipelines, multi-tenant SaaS applications, and more. I'm passionate about finding the right solution, not the first, fastest or most fashionable. If you are looking for a leader with a unique background and breadth of perspective to help you build something, reach out! * AWS alum * AWS DevOps Professional Certified * Full-stack engineer with specialization in the AWS Cloud (CDK/SAM), TypeScript/JavaScript, NodeJS, and React. I have also delivered projects in Java and Python as needed. * Multiple Project Management Certifications (ITL, 6-Sigma, etc). I am happy to help manage your projects as well. * Proven leader and communicator. I will do everything within my power to make your project successful, and a big part of that will be keeping communication lines open and active.Backend Rest API
Amazon S3Cloud ArchitectureAWS AppSyncBig DataAWS LambdaAPI DevelopmentAmazon EC2RESTful APIAmazon Web ServicesTypeScriptReactJavaJavaScriptGraphQLAmazon DynamoDB - $75 hourly
- 0.0/5
- (1 job)
"I'm an experienced developer specializing in creating dynamic websites for small and medium-sized businesses. Whether you're looking to enhance your online presence, showcase your services, or establish an e-commerce store, I have the expertise to assist you!" • I'm experience in TypeScript, React, Next.js, Tailwind CSS, MongoDB, Jest, Cypress, GraphQL, AWS, GCP, Docker, K8, Git, GitHub actions and much more! • I know the ends and outs of Shopify! With over 7 years experience working directly in Shopify Plus. I'm very familiar with their apps, themes, and APIs. • I will take responsibility for the efficient and effective execution of your project from beginning to end. • I value consistent communication, so let's stay connected!Backend Rest API
Tailwind CSSShopify PlusGoogle Cloud PlatformAWS LambdaGraphQLRESTful APICypressJestSequelizePostgreSQLMongoDBNext.jsReactTypeScriptJavaScript - $20 hourly
- 5.0/5
- (3 jobs)
Hi there! I’m a full-stack software engineer with a passion for building dynamic, user-friendly web applications. Whether you need a responsive website, an intuitive user interface, or a robust back-end system, I’m here to help bring your vision to life. My expertise includes: Front-end development using React.js, Svelte, Redux, HTML5, CSS3, and JavaScript Back-end development with Python, Flask, Node.js, and RESTful APIs Database management with PostgreSQL, MongoDB, and SQL Creating responsive and mobile-friendly designs User authentication and secure data handling In addition to my technical skills, I bring several years of diverse experience in the tech industry. I’m skilled in enhancing systems, aligning technical solutions with business objectives, and leading projects from start to finish. I thrive in Agile workflows and have a proven track record of contributing to organizational growth and success. I’m dedicated to ensuring clear communication and timely delivery throughout the project lifecycle. Let’s connect and create something amazing together!Backend Rest API
GitSequelizeFlaskPostgreSQL ProgrammingSQLResponsive DesignRESTful APICSS 3HTML5Node.jsReduxJavaScriptReactWeb DevelopmentWeb Application - $30 hourly
- 5.0/5
- (1 job)
Owner | XR Developer at FulcrumXR. I am an Extended Reality (VR, AR, 3D) developer with over 5 years experience in the tech industry with a prior background in professional photography and videography. I have created everything from Augmented Reality iPhone apps to Virtual Reality experiences for Architectural Visualization utilizing multiple softwares such as Xcode, Unreal Engine, Twinmotion, Adobe Creative Suite and more. I look forward to working with you through every step of the process ensure high quality and professional product that meets your needs.Backend Rest API
JSONRESTful APIMobile App DevelopmentGitHubGitiOS DevelopmentModel View ViewModelApple XcodeFirebaseUIKitSwiftObject-Oriented ProgrammingCore DataAlamofire3D RenderingPhotorealistic RenderingNVIDIA OmniverseBlenderTwinmotionArchitectural WalkthroughArchitectural RenderingUnreal EngineVirtual Reality3D Architectural Rendering3D Architectural Visualization - $90 hourly
- 5.0/5
- (20 jobs)
Top 1% Expert-Vetted Freelancer on UpWork ✅ Hi 👋 I'm Gabe. Over the past 10+ years, I’ve built production-grade software for Fortune 500 enterprises and startups alike. Today, I leverage cutting-edge AI tools (Cursor, ChatGPT, Bolt, Claude) to deliver projects faster and with fewer bugs, so you get to market quicker with a polished product. What I Bring to the Table 🧠 AI-Infused Development: Whether it’s prototyping or full-scale implementation, I use AI-assisted workflows to accelerate development timelines and ensure high-quality code. 📱 Full Stack Expertise: Skilled in TypeScript, React, React Native, Firebase, and more. I can build iOS & Android apps with React Native and web apps with Next.JS from scratch, or jump into an existing codebase to turn things around. ✏️ Prototyping & MVPs: Rapidly translate your ideas into a functional prototype using tools like bolt.new, so you can validate your concept fast. 📞 Collaboration & Communication: Clear, consistent updates and a proactive approach to problem-solving. I treat your project like my own. Why Work With Me? ✅ Top 1% on Upwork: Expert-Vetted status reflects my commitment to delivering exceptional results. ✅ Proven Track Record: Clients consistently highlight my responsiveness, timely deliveries, and keen attention to both technical and UI details. ✅ Open-Source Credibility: My public React Native project on GitHub has over 100 stars, demonstrating community trust and expertise. Testimonials ⭐ “Gabe was incredible. He went above and beyond. Looking forward to working with him more!” ⭐ “He is good at estimating work, sticks to timelines, is responsive, and understands both technical and UI requirements well.” ⭐ “He’s become an invaluable member of our team, always producing high-quality work. Communication, dedication, and meeting deadlines are all top-notch.” Ready to start building? Let’s chat about how I can help bring your project to life.Backend Rest API
Expo.ioArtificial IntelligenceAI BuilderChatGPTClaudeRESTful APITailwind CSSJavaScriptReact NativeFirebaseSmartphoneAndroidiOSMobile App DevelopmentReact - $125 hourly
- 4.9/5
- (32 jobs)
FHIR certified. Mirth Certified. Jitterbit. 16 years building complex HL7, FHIR API, csv, flat file healthcare interfaces. Standard services include: - affordable price to setup your Athena, Epic and Cerner dev code accounts and build necessary FHIR api calls as an automated Postman collection including the Oauth requirements( this gives your team a jump on healthcare deep integration) or setup Mirth integration engine with pre-built channels. - setup an efficient process for you to convert or map csv, HL7, or database fields to FHIR resources and then deliver to Azure, AWS, GCP, sftp, REST or any application - setup process so you can convert incoming FHIR resources to any data format for your application to ingest. - HL7 v2 integration of all types including: ADT, VXU (vaccine), ORU(imaging or lab), ORM(imaging and lab orders), SIU(scheduling), DFT(charges), MDM(docs), RDE(medications) and many other types of HL7.Backend Rest API
InterSystems CachéAthena Software PenelopeEpic Systems Medical SoftwareOracleFHIRMirth ConnectHealthcare InteroperabilityHealth Level 7API IntegrationRESTful APISQLWeb Service - $35 hourly
- 0.0/5
- (0 jobs)
A Full Stack Developer with a background in Administrative Management, Program Development, and Facilitation. My insatiable curiosity keeps me seeking out puzzles, problems, and challenges that force me to find solutions through creativity, critical thinking, perseverance, and collaboration. The speed of evolution in the tech industry excites me, and my passion for knowledge motivates me to adapt my skillset to match the demands of the industry. • I feel most comfortable with Javascript. React is my front-end library of choice. • I have built projects with MongoDB, Express.js, React.js, Node.js, Python, Django, PostgreSQL, and CSS frameworks. • I have experience with agile principles: sprint planning, stand-ups, welcoming changing requirements late in the project, and delivering frequently.Backend Rest API
MERN StackRESTful APIPostgreSQLBootstrapjQueryNode.jsHTMLAmazon Web ServicesCSS 3MongoDBGitDjangoReactPythonJavaScript - $25 hourly
- 0.0/5
- (0 jobs)
I’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help. Knows HTML and CSS, jQuery Regular communication is important to me, so let’s keep in touch.Backend Rest API
RESTful APIWeb ApplicationCSSHTMLMySQLJavaScript - $15 hourly
- 0.0/5
- (0 jobs)
I’m a results-driven Software Engineer with over 5 years of experience delivering robust backend solutions and scalable automation frameworks. I specialize in Java, Spring Boot, Selenium, and AWS, with a strong focus on building and optimizing microservices, API development, and test automation. Here’s what I can do for you: • Design and build scalable REST APIs with Java and Spring Boot • Automate UI and API testing using Selenium, RestAssured, TestNG • Set up and manage AWS services like Lambda, S3, EC2, SNS/SQS, and API Gateway • Integrate CI/CD pipelines using Jenkins, Git, and Maven • Performance testing and monitoring with tools like JMeter and Dynatrace • Develop AI-based applications and chatbots using Python, LangChain, and AWS Bedrock My approach is simple — I listen carefully, solve real problems, and deliver clean, efficient code with a focus on maintainability and performance. Let’s connect if you need a tech partner who can turn your vision into high-quality software solutions.Backend Rest API
Amazon BedrockGitPerformance TestingTest AutomationCI/CDPythonMicroserviceSQLMongoDBJenkinsRESTful APIAWS LambdaSeleniumSpring BootJava - $65 hourly
- 0.0/5
- (0 jobs)
I'm a highly motivated and versatile full-stack developer with a passion for building scalable, robust, and user-friendly applications. My expertise spans both backend and frontend development, with a strong foundation in Python, JavaScript/TypeScript, and database technologies. I have a proven ability to design and implement complex data pipelines, leveraging asynchronous programming, data validation, and REST API development. I'm also skilled in creating modern user interfaces using React and Chakra UI, with a focus on user experience and accessibility. My recent projects include: A robust data pipeline that extracts, validates, and loads data from various sources into a database. A REST API for generating I-Ching hexagrams and interpretations, with a user-friendly interface and AI integration. A personal portfolio site that showcases my skills and experience. I'm committed to continuous learning, problem-solving, and delivering high-quality results. I'm eager to collaborate with clients on challenging projects and help them achieve their goals." Call to Action: If you're looking for a skilled and reliable developer who can bring your vision to life, please don't hesitate to contact me. I'm excited to discuss your project and how I can contribute to your success.Backend Rest API
RESTful ArchitectureMERN StackJestJavaScriptNode.jsExpressJSReactTypeScriptMongoDBRESTful APIWeb Application - $25 hourly
- 0.0/5
- (1 job)
To help companies with quality in a mobile app or website space. Like to work with creative teams and be collaborative environment. Summary of Qualifications * Extensive experience working with all aspects of in-house developed system. * Expertise in full project life cycle development in iOS and Android.Backend Rest API
ApplicationAutomationRESTful APIDesktop ApplicationMobile AppAutomated Testing Want to browse more freelancers?
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