As a Java Developer, I bring 5 years of commercial experience in the full software development life cycle, from requirements analysis, clarification, and design to coding, testing, and deployment.

I have a proven track record of successfully developing robust and scalable Java applications utilizing a wide range of technologies and approaches:

‣ Java 17;

‣ Spring (Boot, Security, Cloud, Data, MVC)

‣ Micronaut;

‣ AWS (lambdas, DynamoDB, S3, SQS, API GW);

‣ REST;

‣ OpenAPI 3.0;

‣ OAuth2;

‣ Keycloak;

‣ Hibernate;

‣ PostgreSQL/ MS SQL Server;

‣ Apache Kafka;

‣ Docker/ Kubernetes;

In my current role as a Senior Java Developer, I designed and implemented two systems in the Telecom and Automotive domains. My experience covers Insurance and eLearning domains as well.

Key highlights of my expertise include:

• profound experience in synchronous/ asynchronous API development;

• strong background in troubleshooting and debugging complex monolith applications and distributed systems;

• extensive experience with serverless architecture and cloud computing;

• in-depth knowledge of design patterns, software architecture approaches with related principles (GRASP, SOLID, KISS, DRY, YAGNI, SoC), and code best practices;

• wide experience in working with relational and non-relational storages;

• collaboration with cross-functional teams.

• requirements clarification with customer;

Developed in-car navigation product services with Serverless architecture:

⁍ improved REST API cold start time from 8-9 seconds to 1-1.5 seconds by integrating the SnapStart feature leveraging the CRAC library;

⁍ integrated Micronaut framework to replace manual DI and utilize AOP. It made the code base more readable and maintainable;

⁍ implemented user management and synchronization between DynamoDB and Keycloak in a multi-tenant architecture utilizing Keycloak admin REST client of 21.0.1 version;

⁍ implemented in-memory LRU cache using LinkedHashMap to use efficient get/put operations. Caching increased the performance of existing API cause there was no need to call third-party API to retrieve the data.

In the automotive domain with the microservice architecture, designed and implemented the following:

⁍ authentication flow scenarios based on the Apigee platform (Google platform usually used as API Gateway);

⁍ fault tolerance approaches (Circuit-Breaker, Retry) for microservice using the Resilience4j library;

⁍ messaging using Apache Kafka to enable reliable communication and event-driven architectures across microservices;

Developed the CRM system with a Monolithic architecture aimed at managing student and university administration members' data:

⁍ optimized queries to speed up data retrieval for reports built with Jasper Report using PostgreSQL indexes. It increased the overall system performance;

⁍ leveraged multithreading tools like CompletableFuture API to asynchronously pull data needed to build reports.

Was working on enterprise projects intended to optimize the business activities of insurance-oriented companies:

⁍ implemented db schema migrations with Liquibase;

⁍ contributed to monolithic architecture splitting into microservice architecture using DDD principles: defining business capabilities, bounded context;

⁍ implemented an optimistic locking strategy using Hibernate's locking mechanism to manage concurrent access to shared data.

- досвід роботи з системами захисту: SIEM, XDR та DLP;

- знайомий з міжнародними стандартами, такими як GDPR, PCI DSS та ISO 27001;

- розуміння архітектури комп'ютерних мереж;

- розуміння основ безпеки та поширених вразливостей;

- знання архітектури операційних систем сімейства GNU/Linux;

- захистив дипломну роботу на тему «Розробка системи система безпеки»;

- досвід роботи зі сканерами безпеки, такими як OWASP ZAP та Burp Suite, та подальшої експлуатації вразливостей.

My last position is a System administrator in an online store. At that position, I was responsible for maintaining IT systems, primarily technical support for a website running on the CMS OCStore. Also, I was responsible for website content development, promotion, troubleshooting, and optimization. Configured and automated workflows.

When I was working in online store, I was studying on Android development course, that gave me a knowledge and some practice of various technologies in this field.

Skills I got at Android course:

* Kotlin

* Java

* Model-View-ViewModel (MVVM)

* Model-View-Presenter (MVP) pattern

* Kotlin Coroutines

* Base knowledge of RxJava / RxAndroid

* RESTful API using: Retrofit / OkHttp

* Dependency Injection: Hilt

* Databases: Room

* Firebase: Messaging

* Git (GitHub, Git bash and UI)

Skills I got at last position:

* Search Engine Optimization (SEO)

* Google Apps Script (JavaScript)

* MS Power Automate Desktop

* CRON

* PHPMyAdmin

* OpenCart (OCStore) CMS

* Google Analytics 4

* Google Ads

* Google Tag

• Successfully led QA for a feature release resulting in a successful launch.

• Implemented a pre-regression call to streamline ticket prioritization, ensuring focus on critical issues and reducing frustration during regression preparation.

• Demonstrated quick mastery of the product, enabling swift and effective contributions to project objectives.

• Received recognition from stakeholders for exceptional attention to detail in test reports, leading to improved product quality.

• Played a key role in creating new automated tests, expanding test coverage to new areas and significantly accelerating regression testing process.

• Contributed to the successful launch of our product on new instances, ensuring smooth deployment and functionality across different environments.

• Implemented improvements to the regression testing process, including the development of a more streamlined approach for assigning test cases and enhancing overall understanding.

• Actively provided assistance and guidance to new team members, facilitating their onboarding process and helping them improve their skills and knowledge in QA testing methodologies.

Hello!

I am a Full-Stack developer. My technology stack is Node.js, Nest.js, Express.js, TypeScript, Web3, React.js, Javascript, MongoDB, PostgreSQL, GraphQL. 

I am looking to be hired by a company that makes innovative services or products and join a professional team, contribute to the team's work on the project, adopt the experience and best practices of professional specialists, and constantly improve my knowledge and skills.

I am a hardworking, communicative, and reliable person.

Feel free to contact me via Telegram/Skype by a login @sidorchik91

I'm 54.

40 years of SW/HW systems development and support

Most valuable project experience - www.tinkoff.ru

6+ years (2014-2020) remotely: weekly releases of the Tinkoff Bank WEB API backends (main(mother) API then investments API) on Scala. Coding new business & system support features, writing macros, SBT project optimizing (for Strict), re-factoring, bug-fixing, code reviewing, writing unit/integration/auto tests, documenting features on wiki: in strongly immutable Futures based concurrency & handlers/services/model architecture of the multi-node backend that processes data from tens of internal DBs (mostly Oracle) & WSes; monolith then splitting to micro services. Macros, internal libs support, hundreds of business tasks for data manipulation and processing. All tasks for developing an already working fully functional bank WEB API for web and mobile fronts were carried out by a team of initially 5-6 developers with weekly releases. Constant communication with teams of specifiers and testers, fronts developers.

Due to health limitations (got AEMI in may 2020):

- Military duty: released even in wartime

- Work mode: remote only (from home) via RDP/VNC/local PC

- Work schedule: I need special but stable 8 hours work schedule ~4h+4h with ~2-3h break, starting _~10:00-11:00 GMT+02:00/03:00 to support health stability

• Базові знання методології Scrum, Kanban.
• Базове знання Jira, Confluence, GitHub, Exel, Microsoft Office, CRM, 1C.
• Вмію керувати конфліктами.
• Вмію знаходити та наймати людей в команду.
• Вмію звільняти людей.
• Закінчила курси від Hillel Project Management(лінк на сертифікат https://certificate.ithillel.ua/view/55487114)
• Вмію працювати з великим обсягом інформації та в режимі багатозадачності.
• Уважна до деталей, орієнтована на результат, відповідальна, стресостійка, комунікабельна, допитлива.

HTML, CSS (scss/less), responsive (flexbox/grid/bootstrap-grid), BEM, JS, React(learning), npm/yarn/bower, gulp, Webpack, git, WordPress (WooCommerce), XAMPP/OpenServer, VSCode, TailwindCSS, Figma/Photoshop,

SEO specialist (5 років): grey hat linkbuilding.

Верстальщик/Frontend: 1) Новостной сайт (js,php,sql,css/html); 2) Интернет магазин (WooCommerce); 3) сайт поиска фильмов по TMDB (React.js).

Вивчаю: React (beginner), JS (advanced), English (A2).

В пошуках internship як frontend або fullstack developer/assistant (remote)