Hire Remote Senior
Ruby on Rails Developers
in Romania

Andrei is a senior software developer and ex-Microsoft engineer with 10+ years of experience developing web, desktop, mobile, and blockchain apps using Ruby, C#, and Javascript. His products brought $100M+ in total revenue and are used by dozens of millions of users to this day. Being a startup founder himself, Andrei knows exactly what brands need to succeed and how to bridge the gap between business and technology. He is here to help companies grow using the right software and tools.

Ruby on RailsRubyC#LeadershipJavaJavaScriptManagementReactAWSPythonNode.jsHTML/CSSPHPAndroidC++SQLDjangoMySQLAngularWordPressJSONDatabaseAPIGoogle MapsPostgreSQLAzureLaravelGoogle AnalyticsAutomationMigrationAndroid StudioTypeScriptJiraPayment gatewayFirebaseStripeFront-EndUI designAlgorithmLanding pagesDockerPython 3Google Cloud PlatformBack-EndCQRSRustKubernetesReact NativeBlockchainEthereumGraphQLCryptocurrencyCTOPayment systemsAWS Lambda.NET CoreSolidity.NETFinTechAgileNext.jsASP.NETASP.NET Web FormsPayment processingQR CodeFigmaRESTful APINestJSOpenAIPython 2Vue.jsMarketing strategiesEcommerce support. ServerMongoDBUnit TestingTestingSeleniumGitHubAmazon EC2MapsWeb ScrapingCloudCRMTwilioWeb DevelopmentSystem AdministrationStripe PaymentsOrchestrationDashboardsCode ReviewSystem designSoftware DesignContainerizationCircleciMicroservicesSoftware Quality AssuranceMVP ArchitectureEDIWeb ApplicationDocumentation ProcessSCSSVercelOOP Large ScaleSource code scanningSoftware architectureExpress.jsmacOSDistributed Systems DesignHerokuIntegrationFull StackDocument managementSidekiqData ScienceData VisualizationRequirements GatheringJSON APIIntegrationsData processingWindows 10Data architectureCI/CDMobile App DevelopmentAPI IntegrationAPI DocumentationSecure Code ReviewAPI IntegrationsPerformance EngineeringApi architectureB2B Product MarketingDevOpsQAB2B marketing

A Ruby on Rails engineer with over 5 years of commercial experience in web development. Have experience in usage of PostgreSQL, MySQL, React, Redis and Sidekiq. Proven track record of successfully undertaking complex back-end and front-end projects, delivering optimized, scalable, and maintainable code. Adept in performance tuning and committed to crafting robust applications that excel in efficiency and user experience.

Ruby on RailsSQLJavaScriptPostgreSQLRedisMySQLDocker ComposeDockerAWSElasticsearchNginxRSpecResqueStimulusjsSCSSApache HTTP ServerChart.jsCoffeeScriptActive adminQR Code

👉 I am a Senior Ruby Full Stack consultant / contractor / freelancer with 6+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞. I use my expertise, skills, and passion to architect, design, and implement modern, practical, and reliable systems for my clients. 💎 𝐂𝐨𝐧𝐭𝐫𝐢𝐛𝐮𝐭𝐨𝐫 to the 𝐑𝐮𝐛𝐲 𝐨𝐧 𝐑𝐚𝐢𝐥𝐬 framework, because it ships with all the tools needed to build amazing web apps on both the front and back end, compresses the complexity of modern web apps, and is optimized for happiness. ✔️ 𝐂𝐨𝐧𝐭𝐫𝐢𝐛𝐮𝐭𝐨𝐫 to 𝐂𝐚𝐥.𝐜𝐨𝐦, an open-source Calendly alternative with 10𝐤+ 𝐆𝐢𝐭𝐡𝐮𝐛 𝐬𝐭𝐚𝐫𝐬, built on React/Next.js and Typescript. ✔️ Also a 𝐓𝐞𝐜𝐡 𝐖𝐫𝐢𝐭𝐞𝐫 for the well-known blog 𝐋𝐨𝐧𝐠𝐋𝐢𝐯𝐞𝐑𝐮𝐛𝐲.𝐜𝐨𝐦, a leading resource for any developer working with Ruby. About my skills: • Ruby / Ruby on Rails / Turbo / Hotwire • Modern Javascript • SOLID Principles • PostgreSQL / Redis • React.js / Next.js / Typescript • Domain-Driven Design (DDD) / CQRS • Docker / Microservices / Event-Driven Architectures 💻 Only interested in remote work. 📞 Phone: +40744 401 403 ✉️ Email: mihai.colceriu.dev@gmail.com 💬 Skype: mihai.colceriu.dev@gmail.com

Ruby on RailsPostgreSQLTypeScriptSOLID PrinciplesRedisHerokuAWSNext.jsDockerDomain-Driven DesignCQRSCI/CDRSpecJiraTest driven developmentSidekiqCircleciRESTful APIGitHubTailwind css