Boris K.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

𝟭𝟳𝟬 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀. 𝟮𝟮 𝘆𝗲𝗮𝗿𝘀. 𝗕𝘂𝗶𝗹𝘁 𝘁𝗼 𝘀𝗰𝗮𝗹𝗲. 𝗕𝘂𝗶𝗹𝘁 𝘁𝗼 𝗽𝗲𝗿𝗳𝗼𝗿𝗺. 𝗕𝘂𝗶𝗹𝘁 𝗳𝗼𝗿 𝗴𝗿𝗼𝘄𝘁𝗵. 🔥 𝐅𝐫𝐞𝐞 𝟐𝟎 𝐡𝐨𝐮𝐫𝐬 𝐨𝐟 𝐩𝐥𝐚𝐧𝐧𝐢𝐧𝐠 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐧𝐞𝐰 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 (DM "Free") 🔥 𝐅𝐫𝐞𝐞 𝐜𝐨𝐝𝐞 𝐫𝐞𝐯𝐢𝐞𝐰 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐞𝐱𝐢𝐬𝐭𝐢𝐧𝐠 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 (DM "Free") 🔥 𝐁𝐨𝐧𝐮𝐬: 𝐅𝐫𝐚𝐜𝐭𝐢𝐨𝐧𝐚𝐥 𝐂𝐓𝐎 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐝 - CTO-level architecture and technical guidance at no extra cost. Main focus: ✅𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐖𝐞𝐛 & 𝐒𝐚𝐚𝐒 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: build production-ready web applications, SaaS platforms, customer/admin portals, dashboards and complex business systems from A to Z with Java, Spring Boot, Spring Cloud, Angular, React, REST APIs, PostgreSQL/MySQL, AWS, Docker and Kubernetes. Every engagement includes CTO-level architecture and technical oversight. ✅𝐂𝐨𝐦𝐩𝐥𝐞𝐱 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 & 𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: design scalable backend architecture, business logic, APIs, WebSockets, data hubs, gateways and third-party integrations using Java, Spring Boot, REST, SOAP, OAuth and event-driven technologies. ✅𝐀𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: embed AI-powered features into SaaS and business software using Claude, Codex, MCP, RAG, Vertex AI and Spring AI for analytics, automation, predictive systems and AI over business data. ✅𝐂𝐥𝐨𝐮𝐝 & 𝐒𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: architecture and development of cloud-native, serverless and scalable applications using AWS, GCP, Docker, Kubernetes, ECS, EKS, Lambda, RDS, SQS/SNS and zero-downtime deployment. ✅𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠: structured review of your application, architecture, AWS infrastructure, deployment process, monitoring, APIs and operational dependencies, followed by a prioritized remediation roadmap. ✅𝐏𝐎𝐒 𝐚𝐧𝐝 𝐌𝐮𝐥𝐭𝐢-𝐒𝐭𝐨𝐫𝐞 𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞: POS, KDS, checkout, payments, catalog, ordering, inventory, loyalty, reporting and multi-store commerce software for businesses operating across physical locations and online storefronts. ✅𝐈𝐨𝐓 𝐅𝐥𝐞𝐞𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: build secure IoT, telemetry, remote diagnostics and predictive maintenance platforms for manufacturers, service teams and operators managing connected devices at scale using AWS IoT, MQTT, data streaming and cloud analytics. ✅𝐉𝐚𝐯𝐚 𝐄𝐜𝐨𝐬𝐲𝐬𝐭𝐞𝐦 𝐌𝐨𝐝𝐞𝐫𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧: modernize Java-based enterprise systems in controlled stages using Java, Spring, Spring Boot, EJB, Oracle, WebLogic, WebSphere and JBoss/WildFly while preserving critical business functionality. ✅𝐄𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐑𝐞𝐬𝐜𝐮𝐞: take over, understand, stabilize and safely continue development of complex Java, Spring and AWS systems when the existing team, architecture or delivery process is no longer reliable. ================================================ WE EARN/SAVE MONEY💰 FOR OUR CUSTOMERS by: • allowing their business to expand (or start sometimes:) • automating processes and reducing operational cost • using newer and more efficient technology • long-run cost reduction because of high-quality software. ================= Some tech below =============== ✓ Full-Stack Web: Java, Spring Boot, Spring Cloud, Angular, React, JavaScript, Bootstrap, OAuth. ✓ Java/Spring: Spring Boot, Spring MVC, Spring Web, Spring Security, Spring Data, Spring AI. ✓ Java/JavaEE: EJB, JSP/JSF/RichFaces, Oracle ADF, JavaFX. ✓ APIs & Integrations: REST, SOAP, XML-RPC, WebServices, WebSockets, Swagger/OpenAPI. ✓ Cloud: AWS, Google Cloud, Docker, Kubernetes, ECS, EKS, cloud-native apps, scalable clusters, zero-downtime deployment. ✓ AI: Codex, Claude, MCP, RAG, Vertex AI, Spring AI. ✓ Databases: Oracle, PostgreSQL, MySQL, PL/SQL, AWS RDS, Aurora, Cassandra, Redis, MongoDB, Neo4j, HDFS, S3/Parquet, JPA, custom ORMs. ✓ AWS: EC2, Kinesis, Athena, Redshift, DynamoDB, Lambda, IoT, SQS/SNS, CloudFront, Route53, API Gateway. ✓ Data streaming: AWS Kinesis, Firehose, SQS/SNS, Kafka, Camel, RabbitMQ. ✓ Servers: Tomcat, WebLogic, JBoss/WildFly, WebSphere. ✓ Performance optimization: JMeter, JProfiler, AWS X-Ray, GTMetrix, Gatling. ✓ Version control: Git, GitHub, Bitbucket, GitLab, SVN. ✓ CI/CD: Bamboo, Jenkins, Circle CI, Sonar, Bitbucket Pipelines, GitHub Actions, AWS CodeBuild/CodeDeploy. ✓ Other: Maven, Nexus, Gradle, Ant, Workflow Automation, Performance Optimization, QA Automation. 𝐑𝐞𝐚𝐝𝐲 𝐭𝐨 𝐛𝐮𝐢𝐥𝐝? 𝐌𝐞𝐬𝐬𝐚𝐠𝐞 𝐦𝐞 - 𝐥𝐞𝐭’𝐬 𝐠𝐞𝐭 𝐢𝐭 𝐦𝐨𝐯𝐢𝐧𝐠.