Hire the Best Java Developers
in Estonia

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Yevhen K.

Tallinn, Estonia

$50/hr
5.0
12 jobs

💻 Abobe Certified Expert with almost 10 years of hands-on experience. Custom components, OSGI Services, Content migration, AEM version migrations, Troubleshooting, Workflows, Events, Jobs, AEM as a Cloud Service, Edge Delivery Services, and integrations. 👨‍💼 With over 10 years of valuable experience and 2 Adobe Certified Expert certifications, I have collaborated with 10 distinguished companies across 7 diverse industries, including Automotive, Government, E-commerce, Pharma, Logistics, HealthCare, and Events. 🌟 14 noteworthy projects include contributions to BMW, Whirlpool, Kitchenaid, Maytag, Amana, DHL, Canadian Tire, Reed Exhibitions, Agillic, The National Lottery, Novo Nordisk, Helios, AIDA Cruises, and Sonova. 👨‍🔧 I can't imagine a task that I haven't handled before! 📝 To get more info about my experience, please check my Employment History. I'm looking forward to getting in touch with you and contributing effectively to your project. I hope these changes help! Let me know if you need anything else. 🔑 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬 🔑 AEM Consultations | Full cycle development | Adobe Experience Manager | AEM Full Stack | Java | AEM Services | Adobe Developer | Cloud | AI | MVP | Frontend | React | Vue | Angular | Next.js | Wix | Bubble | Shopify | CMS | Adobe Expert | DevOps | Support

  • Java
  • Web Development
  • CMS Development
  • Adobe Experience Manager
  • CMS Framework
  • CSS
  • HTML
  • React
  • Cloud Architecture
  • Web Design
  • UX & UI
  • Figma
  • Adobe Target
  • Adobe Analytics
  • Adobe Edge
Aleksandr N.

Tallinn, Estonia

$50/hr
5.0
45 jobs

Google Cloud Certified Architect Google Cloud Certified Developer Experienced Java Engineer with 10+ years of experience, more than 10000 UpWork hours and official UpWork Top Developer certificate. I specialise in large scale, high availability enterprise applications development (Web and Desktop), extensive knowledge of Spring stack and different Spring API-s, development of Spring-boot based microservice architecture, experience with different AWS API-s and AWS infrastructure setup. Complete full stack development of web applications from front-end to backend and production ready deployment to AWS. - Java Web & Desktop applications. - Spring Stack - Spring MVC, Spring Boot, Spring Security, Spring integration. - REST APIs integration, design and development. - Front End Development - React/Angular - Databases/ORM - MySQL, PostgreSQL, Spring Data/JPA/Hibernate. - ElasticSearch - AWS, Google Cloud - Google Cloud Certified Developer - Messaging - Kafka, JMS, ActiveMQ, and SQS and Google Cloud Pub/Sub Also interested in math, finance, quantitive analysis, complex algorithm design, competitive programming and computer security. Completed coursera courses : Cloud Engineering with Google Cloud (full professional certificate) Google Kubernetes Engine Parallel Programming in Java Algorithms I, II. Programming Languages Computer Networks Algorithms, Design and Analysis Software Security

  • Java
  • Spring Boot
  • Spring Framework
  • AngularJS
  • JavaScript
  • iOS Development
  • HTML
  • Twitter/X Bootstrap
  • Play Framework
  • Microservice
  • CSS
Eugene O.

Tallinn, Estonia

$35/hr
4.9
49 jobs

Drawing on 18+ years of experience in diverse technologies (including Amazon Web Service), I deliver innovative, well-architected cloud-based solutions for challenging environments. As a certified AWS Solutions Architect (Professional and Associate) with AWS Security Specialty, I design, build, and optimize scalable, secure, and cost-effective architectures. Highlights: ✅ 18 years in IT; 12 years as CEO, Founder, and AWS Solutions Architect ✅ Successfully led 50+ projects for 20+ clients across industries ✅ Specialized in cloud migrations, serverless architectures, and cost optimization ✅ Certified AWS Solutions Architect (Professional & Associate) and AWS Security Specialty → Key Expertise: Cloud Architecture & DevOps ✓ Extensive experience designing serverless platforms (e.g., VOD systems, Tibica optimizations, Infoplay CMS). ✓ Proficient in IaC tools like AWS CloudFormation and Terraform for infrastructure automation. ✓ Expertise in securing systems with AWS IAM, Cognito, and Keycloak. AWS Solutions & Services: ✓ Core: AWS Lambda, API Gateway, DynamoDB, S3, CloudFront, MediaConvert, Glue ✓ Analytics: AWS EMR, Kinesis Streams, SageMaker, Athena ✓ Security: AWS Security Hub, GuardDuty, Keycloak ✓ Deployment & Optimization: AWS CodePipeline, Docker, Kubernetes, Helm Programming & Frameworks: ✓ Languages: NodeJS, Python, JavaScript ✓ Frameworks: ReactJS, VueJS, Redux, Vuetify Industries Served: → Healthcare, Mortgage, Medicine, Insurance, Retail, Advertising, Media, Security Main skills: ✓ Skilled in planning and executing cloud migrations (e.g., Docker to AWS Serverless). ✓ Expertise in optimizing serverless architectures for performance and cost (e.g., Tibica optimizations). ✓ Proven track record of designing scalable, compliant solutions for diverse industries. ✓ In-depth knowledge of AWS Well-Architected Framework and service combinations like Lambda, DynamoDB, MediaConvert, and Glue. ✓ Ability to design end-to-end secure, scalable platforms tailored to client requirements. ✓ Expertise in designing and deploying serverless architectures (e.g., VOD platform, Infoplay CMS). ✓ Skilled in integrating AWS services like Lambda, API Gateway, and CloudFront for scalability and resilience. ✓ Proficient in cost optimization strategies, including reserved instances and pay-as-you-go models. ✓ Experience in securing systems with IAM, Cognito, and Keycloak. ✓ Hands-on knowledge in managing infrastructure with IaC tools like CloudFormation and CodePipeline. Case Studies Summary 1. Video on Demand (VOD) Platform for Roligt AB - Developed a serverless VOD platform with a super-admin panel, publishing platform, and secure video page. - Leveraged AWS services like MediaConvert, MediaPackage, Lambda, API Gateway, DynamoDB, and CloudFront. - Achieved scalability, cost efficiency, and GDPR compliance​​. 2. Custom Digital Signage System for Infoplay - Built a serverless content management system reducing costs by up to 80%. - Integrated AWS Lambda, API Gateway, S3, Cognito, DynamoDB, and MediaConvert for scalability and flexibility​. 3. Tibica Cloud Platform Optimization - Enhanced performance and reduced latency by optimizing serverless architectures. - Transitioned Tibica’s Lambda functions to ARM-based architecture for cost savings and better efficiency​. 4. Docker to AWS Serverless Migration - Migrated Docker applications to AWS Serverless architecture using Lambda, resulting in up to 40% cost savings and auto-scaling capabilities​. 5. AWS Cost Optimization - Conducted a Well-Architected Framework Review to align cloud operations with best practices. - Identified cost-saving opportunities like rightsizing and reserved instances​. 6. Secure SSO Solution - Built a custom SSO solution using Keycloak and AWS services like EC2, RDS, and Cognito, achieving extensive customization and significant cost reduction compared to alternatives like Okta​. 7. MVP Development - Created scalable and secure MVPs on AWS using Lambda, API Gateway, Glue, and other serverless technologies. - Optimized for rapid iteration, security, and cost-efficiency​​.

  • DevOps
  • Amazon EC2
  • AWS Lambda
  • Docker
  • Python
  • Amazon S3
  • Kubernetes
  • API Integration
  • Cloud Architecture
  • Serverless Computing
  • AWS CloudFormation
  • Cloud Migration
  • Web Application Development
  • Amazon Web Services
  • Node.js
  • PostgreSQL
  • AI Agent Development
  • React
  • CI/CD
  • Terraform
Md Samiul Alim S.

Tallinn, Estonia

$70/hr
4.6
50 jobs

I’m a Senior Backend Engineer and Software Architect with 9+ years of experience building systems that don’t just work but scale, evolve, and stay maintainable over time. I focus on designing and delivering high-performance, reliable backend systems from early-stage concepts to production systems handling real-world complexity. My work spans microservices architecture, event-driven systems, real-time applications, and modern data platforms (including vector databases). I help teams move from "it works" to systems that are clear, stable, and ready to grow. Over the years, I’ve built and maintained platforms across: - Messaging - Audio & Video Streaming - Ride-sharing - eCommerce - FinTech - EdTech - IoT - Blockchain - Enterprise SaaS often operating at scale, with complex workflows and millions of users. What I bring • Strong backend architecture, systems that are easy to reason about and extend • Deep experience in microservices and event-driven design (Kafka, Temporal, Debezium) • Real-time systems expertise, messaging, streaming, live data pipelines • End-to-end ownership, from system design to production deployment • A focus on clarity, not just code, but how everything fits together Tech I work with - Java (Spring Boot), Golang (Fiber), Python (FastAPI) - PostgreSQL, Redis, MongoDB, ElasticSearch, Cassandra, Weaviate - Kafka, RabbitMQ, Temporal, Airflow - Docker, Kubernetes, AWS (plus real-time protocols like WebRTC, MQTT, XMPP when needed) If your system is growing in complexity, slowing down, or becoming harder to evolve that’s usually where I can help the most. Let’s build something that lasts.

  • Java
  • Software Architecture & Design
  • Spring Boot
  • RESTful API
  • GraphQL
  • PostgreSQL
  • Kubernetes
  • Golang
  • MQTT
  • Docker
  • Distributed Computing
  • Apache Kafka
  • RabbitMQ
  • API
  • Vector Database
Andrey S.

Tallinn, Estonia

$29/hr
4.9
26 jobs

I'm a Full Stack Developer React Node, SaaS Developer, and Node.js Developer with 15 years of experience, covering Full Stack development (both Front-end development and Back-end development), SaaS development, Mobile App Development, and AI Automation. A few facts about me: 🏆 100% Job Success score 🏆 Technical partner who cares as about code quality as about business needs 🏆 125+ projects delivered from MVP to enterprise projects 🏆 10,000+ active users across delivered projects What I can develop as a Full Stack Developer React Node and a SaaS Developer: ✔️SaaS MVP, AI-powered SaaS platforms, Multi-tenant SaaS platforms ✔️ AI Automation, AI workflows, AI Chatbot and AI Agent Development that reduces manual operations by up to 70% ✔️ Prototype and proof of concept development saving 40% of budget as a Full Stack node.js react developer ✔️ Custom CRM and ERP systems, Internal tools and other management solution cutting admin costs by 40% ✔️ Booking systems and booking platforms that boosting daily bookings by 30% ✔️ Marketplaces, E-commerce and fintech platforms that boosting sales conversions by 25% ✔️ Scalable web applications and websites ensuring 99.9% uptime as a Full Stack Web Developer ✔️ Admin panel, admin dashboard, and analytics dashboard with charts that cutting reporting time by 60% ✔️ Custom Web Application and other Web Development projects driving 40% more organic traffic ✔️ Mobile applications from design to iOS and Android App Development, covered by React Native developer, Mobile App developer, and Flutter developer positions ✔️ Code audit, Software Architecture & Design, production delivery, debugging, and production bug fixing, reducing errors by 40%. ✔️ role-based access, payment flows, billing and subscription logic, cutting failed payments by 30% ✔️ User Authentication, user management systems, system administrator, and business operations workflows for 10,000+ users Why clients choose me as Full Stack Developer React Node and Node.js Developer: ✔️ MVP development in 4–6 weeks ✔️ AI-first approach using Cursor, Claude Code, Codex, and Lovable for up to 30% faster development as a Full Stack AI Engineer ✔️ AI Development and AI App Development experience across 35+ AI-powered projects ✔️ Improving page load speed by 55% as a Front End developer React and Next.js Developer ✔️ Increased database/API response speed by 5x as a Node.js backend developer and NestJS developer ✔️ Built 120+ API endpoints, microservices, and serverless functions as a MERN Stack developer and javascript developer ✔️ Managed 500K+ records with Database Architecture, Database Design, Prisma, and RLS ✔️ Supported 99.9% uptime with cloud deployment and production deployment ✔️ Reduced deployment failures by 30–40% through CI/CD and release automation ✔️ Handled migration with clear timeline, milestone planning, and long-term maintainability ✔️ Improved user experience, engagement, and visibility through dashboards used by 10K+ users As a Senior Full Stack Developer React Node and SaaS Developer, I have 15+ years of experience with: ⚙️ JavaScript, TypeScript, Python, PHP ⚙️ React, Next.js, App Router, Vite, Vue.js, Angular, Redux, jQuery, HTML, HTML5, CSS, CSS 3, Canvas ⚙️ Node.js, NestJS, Express, WordPress ⚙️ Tailwind CSS, Material UI, Bootstrap, Shadcn/ui ⚙️ SQL, PostgreSQL, MySQL, MongoDB, Supabase, Firebase, Firestore, Redis, Prisma, RLS, Auth ⚙️ Amazon Web Services, AWS S3, AWS Lambda, Google Cloud Platform, Microsoft Azure, Vercel, Railway, DigitalOcean, Cloudflare, Docker, Kubernetes ⚙️ CI/CD (GitHub Actions, GitLab CI), Testing (Jest, Playwright), Monitoring (Sentry), Logging ⚙️ Git (GitHub, GitLab, Bitbucket) ⚙️ LLM, LangChain, RAG, Artificial Intelligence ⚙️ Zapier, n8n, Make, GoHighLevel, GHL ⚙️ HIPAA, GDPR, SOC 2 ⚙️ Figma, Adobe XD, Sketch As a Senior Full Stack Developer React Node and Node.js Developer I have deep experience in API integration: RESTful API, third-party REST API, webhooks, OpenAI API, Stripe API, Twilio API, Anthropic Claude API, ElevenLabs API, ChatGPT API, GraphQL API, WhatsApp business API, Google OAuth, and various Google APIs. As Full Stack Developer React Node and Full Stack Developer SaaS I experience in projects for: Hospitality, Travel, Healthcare, Fitness, Ecommerce, FinTech, Logistics, Finance, Education, E-learning, Retail, HR, Business Services, Media & Entertainment, AI, SaaS marketing, Real Estate platform, etc. 💪 As CTO of Malevich Studio, I can provide: ✔️ UX & UI / Web Design: UX Designer support with Figma, Responsive Design, Adaptive Web Design, Software Design, and Adobe Photoshop for 25–40% conversion improvement ✔️ WordPress developer and cms developer for mobile friendly website support ✔️ Python developer, Full Stack developer Laravel Vue, Java and Ruby on rails 🚀 Click “Invite” if you need a Full Stack Developer React Node, Full Stack AI SaaS Developer, or Node.js Developer.

  • Web Development
  • JavaScript
  • Full-Stack Development
  • API
  • API Integration
  • React
  • React Native
  • Node.js
  • jQuery
  • HTML5
  • CSS 3
  • Responsive Design
  • Software Development
  • ExpressJS
  • Git
  • WordPress
  • Web Application
  • SaaS
  • MongoDB
  • PHP
Deniss J.

Narva, Estonia

$50/hr
5.0
25 jobs

I am a Java software developer with 4+ years of experience behind. I focus mainly on backend tasks which include service infrastructure and API development. Most of my clients are small to medium companies who need robust solutions in a reasonable amount of time. Having a business administration experience I'm able to contribute to project from technical and from business points. I love to expand the domain of my knowledge and work experience in any field. List of expertise areas: - Java: Spring Boot, Dropwizard - MySQL, PostgreSQL, Mongo - JPA, Hibernate - JUnit, JMockit - Database design - REST APIs integration, design and development - AWS, Docker, Ubuntu - ReactJS - PHP Laravel

  • Java
  • Spring Framework
  • MySQL
  • Laravel
  • Database Design
  • PHP
  • API Development
  • JavaScript

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