Oleksandr S.

👉 𝗖𝗹𝗶𝗰𝗸 𝗜𝗻𝘃𝗶𝘁𝗲 𝗯𝘂𝘁𝘁𝗼𝗻 𝗼𝗻 𝗺𝘆 𝗽𝗮𝗴𝗲 𝗮𝗻𝗱 𝗹𝗲𝘁'𝘀 𝘁𝗮𝗹𝗸! I'm a Senior Java developer with a solid computer science background and strong analytical, communication, and soft skills. With 14+ years of experience in the financial sector from Fortune 500 list, including working for the largest Swiss investment bank and an Swiss investment fund (as well as for other business domains like Auctions, Consulting etc.), I specialize in delivering high-quality web and enterprise applications tailored to your business needs. 💼 𝗪𝗛𝗬 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘? – 14+ Years in Finance / Financial / Fintech Development: Extensive expertise in building secure and robust systems for the financial industry. – Full-Stack Proficiency: Skilled in Java, JavaScript, and TypeScript for seamless backend and frontend integration. – Cloud Expertise: Proficient with AWS ( ECS, SQS, SNS, Batch, Lambda, Bedrock, RDS, EC2, CloudWatch, S3 etc.) for scalable cloud solutions. – Comprehensive Technical Leadership: I also manage an Upwork agency, offering access to additional developers to scale your projects as needed. 🚀 𝗪𝗛𝗔𝗧 𝗜 𝗖𝗔𝗡 𝗗𝗢 𝗙𝗢𝗥 𝗬𝗢𝗨: – Custom Software Development: Build scalable, secure, and high-performing web or enterprise applications using Java, Spring, and AWS. – Design & Optimize System Architecture: Design robust and growth-ready systems with cutting-edge technologies. – Front-End Excellence: Create intuitive, user-friendly interfaces using Angular / AngularJS, Vue / Vue JS / Vue.JS, React / React JS / React.JS, Knockout.js. – Cloud Solutions: Implement cloud strategies with AWS services, ensuring cost-efficiency and scalability. – Database Management: Expert in both SQL ( PostgreSQL, MariaDB / MySQL ) and NoSQL ( Apache Cassandra, DynamoDB ) for data-intensive applications. 💪 𝗦𝗞𝗜𝗟𝗟𝗦: Programming Languages: Java 8 / 11 / 17, JavaScript, C/C++, PHP, Bash Frameworks & Libraries: Multithreading, Spring ( SpringBoot, Spring Boot, Spring MVC, SpringMVC, Spring Data, Spring Security ), JPA / Hibernate / Kundera, Akka, JMS ( IBM MQ ), REST, SOAP, Swagger, OpenAPI, REST API, JAX-RS, JAX-WS, AspectJ AOP, Vaadin 7 / 14+ / Flow, JUnit, EasyMock, Solr, Apache POI, JDBC, JSP / JSF, Play Framework, JavaMail, JavaCC, Ehcache Cloud & Infrastructure: AWS: ECS, SQS, SNS, Batch, Lambda, Bedrock, RDS, EC2, CloudWatch, S3, Docker, Hazelcast, Apache ZooKeeper Databases: RDBMS: MS SQL Server, PostgreSQL, MySQL / MariaDB, NoSQL: Apache Cassandra Version Control: Git, SVN, Mercurial Front-End Development: Angular / AngularJS, Ionic, Knockout.js, Vue.js, jQuery, HTML5, CSS, Twitter Bootstrap, Highcharts, Node.js / npm, SockJS / STOMP Build & Automation Tools: Maven, Gradle, Ant Operating Systems: Linux, Windows Cybersecurity: Web-security analysis, symmetric/asymmetric ciphers, PKI Business Domains: Fintech, Banking, Finance, Investment Funds, Payments, Consulting, CRM systems for HR, Car Auctions, Video Streaming 👉 𝗙𝗲𝘄 𝘄𝗼𝗿𝗱𝘀 𝗮𝗯𝗼𝘂𝘁 𝗺𝗲 Fond of developing applications and services using Java Springboot, acting Java backend developer but also as Java Full stack developer. Also I started Upwork agency here and act as PM, feel free to hire more developers if needed! 🎯 𝗟𝗲𝘁'𝘀 𝘀𝗵𝗮𝗽𝗲 𝘆𝗼𝘂𝗿 𝗶𝗱𝗲𝗮 𝗶𝗻𝘁𝗼 𝗮 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗳𝘂𝗹 𝗽𝗿𝗼𝗱𝘂𝗰𝘁. Contact me to get started! 📨