With over 12 years of experience in the software engineering, I have a deep understanding of PHP, Symfony, Laravel, Python, JavaScript & React.js frameworks. Leveraged advanced AI technologies including OpenAI, generative agents, Crew AI, Groq, and various large language models (LLMs) to innovate and optimize solutions across multiple projects, enhancing performance and efficiency. I possess solid knowledge of RDBMS, including PostgreSQL and MySQL. I'm have a big expertise in everything that's concerned CI/CD(Docker, Kubernetes, ElasticSearch, SonarQube, etc.) and development optimizations(Redis, RabbitMQ and many others). As a lifelong learner, I continuously update my skills. I have proven to be an effective team lead, demonstrating a strong understanding of building robust architectures. My broad expertise in software testing and quality assurance techniques ensures the delivery of high-quality software solutions.
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Engineering LeadDetalex GmbhPoland -
Senior Fullstack Engineer(Team Lead)Detalex Gmbh Jan 2023 - PresentMannheim Area, Germany• Led the development of both frontend and backend for a SmartHome Matter security devices platform, resulting in an MVP built in half a year, generating approximately $6M in annual revenue and a 50% acquisition of new customers, using ReactJS with TypeScript & Redux and Python• Restructured project development into manageable milestones, reducing administrative task duration significantly and generating notable cost savings, using Jira.• Directed the overhaul and optimization of the… Show more • Led the development of both frontend and backend for a SmartHome Matter security devices platform, resulting in an MVP built in half a year, generating approximately $6M in annual revenue and a 50% acquisition of new customers, using ReactJS with TypeScript & Redux and Python• Restructured project development into manageable milestones, reducing administrative task duration significantly and generating notable cost savings, using Jira.• Directed the overhaul and optimization of the existing frontend and backend codebase, resulting in a significant performance increase of the web portal, utilizing TypeScript, ReactJS, Redux, Python, Odoo & SonarQube.• Developed a React Native application, resulting in the first MVP within 2 months and acquiring a significant number of new users, using JavaScript, TypeScript, and React Native.• Implemented Generative AI Agents to provide user statistics, improving user engagement significantly and enhancing decision-making with detailed analytics, using Python and Crew AI.• Refactored and reimplemented CI/CD pipelines, achieving zero downtime and establishing a clear CI/CD process, earning praise for my DevOps skills, using Bitbucket Pipelines and Docker.• Integrated a TDD approach and implemented automated tests, achieving high code coverage on frontend, backend, and mobile, using JavaScript, TypeScript, Karma, Jasmine, and PyTest.• Conducted training and knowledge-sharing sessions, as well as code reviews, and was praised for my mentoring skills. Show less -
Senior Fullstack EngineerMercedes-Benz.Io Sep 2019 - Jan 2023Stuttgart Area, Germany• Constructed a global enterprise-level application for web and in-car software using ReactJS with TypeScript, Redux & Redux-Saga, pioneering a new market segment for the company worldwide and yielding significant annual revenues.• Led the market development initiative for Mercedes Benz in Italy utilizing VueJS, generating significant annual revenues for the company.• Established ADA compliance standards for the web-shop, ensuring product accessibility for users with disabilities and… Show more • Constructed a global enterprise-level application for web and in-car software using ReactJS with TypeScript, Redux & Redux-Saga, pioneering a new market segment for the company worldwide and yielding significant annual revenues.• Led the market development initiative for Mercedes Benz in Italy utilizing VueJS, generating significant annual revenues for the company.• Established ADA compliance standards for the web-shop, ensuring product accessibility for users with disabilities and contributing significantly to annual revenue.• Implemented Test-Driven Development (TDD) on frontend & backend, achieving high code coverage within a short time, streamlining the codebase, reducing technical debt, and eliminating third-party libraries with incompatible licenses.• Developed a mobile application for Mercedes-Benz internal statistics using React Native & TypeScript, achieving completion and successful launch within a short time.• JavaScript • TypeScript • React.JS • Angular • Vue.js • Node.js • Express • Jasmine • Karma • Jest • SASS • SonarQube • Jenkins Show less -
Senior Fullstack Engineer1&1 Telecommunication Se Nov 2018 - Sep 2019Karlsruhe Area, Germany• Enhanced an internal, heavy-loaded enterprise web application for managing numerous hosting and telephony products using Java with Spring Boot, Angular with TypeScript, NgRx, and RxJS, resulting in a significant performance boost.• Instituted testing as a mandatory step in the development process using Karma, Jasmine, Jenkins, and SonarQube, leading to high code coverage within a short time and significantly reducing technical debt.• Included testing as a required step into development… Show more • Enhanced an internal, heavy-loaded enterprise web application for managing numerous hosting and telephony products using Java with Spring Boot, Angular with TypeScript, NgRx, and RxJS, resulting in a significant performance boost.• Instituted testing as a mandatory step in the development process using Karma, Jasmine, Jenkins, and SonarQube, leading to high code coverage within a short time and significantly reducing technical debt.• Included testing as a required step into development resulting in ~75% code coverage in 1 month.• Directed initiatives to restructure and refine development processes, significantly increasing the team's development capacity.• Led efforts to triple the team's development capacity.• Performed UX research using Quantitative and Qualitative Research methods to maximize functionality and efficiency, delivering an optimal user experience.• JavaScript • TypeScript • Angular • NgRX • ReactJS • SASS • Java • Spring Boot • Jenkins • SonarQube • PostgreSQL Show less -
Senior Fullstack Engineer(Team Lead)Passionfive Gmbh Oct 2017 - Nov 2018Mannheim Area, Germany• Spearheaded the development of web-based software for managing lawsuits against insurance companies in Germany using Symfony, Angular, ElasticSearch and PostgreSQL, thereby tapping into a significant market potential.• Identified organizational inefficiencies and implemented innovative development approaches, resulting in significant cost savings.• Conducted training sessions to introduce the team to Symfony, Angular, and refined development methodologies, leading to a significant… Show more • Spearheaded the development of web-based software for managing lawsuits against insurance companies in Germany using Symfony, Angular, ElasticSearch and PostgreSQL, thereby tapping into a significant market potential.• Identified organizational inefficiencies and implemented innovative development approaches, resulting in significant cost savings.• Conducted training sessions to introduce the team to Symfony, Angular, and refined development methodologies, leading to a significant increase in performance.• Implemented 100% code coverage using PHPUnit and Karma + Jasmine from the early start of the project, achieving comprehensive testing coverage.• PHP • Symfony • JavaScript • Angular • ElasticSearch • PostgreSQL • Docker Show less
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Fullstack EngineerChemaxon May 2015 - Oct 2017Budapest• Partnered with the CEO to assess company requirements and deployed a new customer support system utilizing Symfony, Angular, MySQL, Docker, and ElasticSearch, successfully implementing front- and backend for a system that met the company's needs.• Directed the team during a Hackathon event, developing a new mobile application that enabled users to live-test the company's software using Ionic and Angular, successfully developing and launching a new mobile application.• Collaborated… Show more • Partnered with the CEO to assess company requirements and deployed a new customer support system utilizing Symfony, Angular, MySQL, Docker, and ElasticSearch, successfully implementing front- and backend for a system that met the company's needs.• Directed the team during a Hackathon event, developing a new mobile application that enabled users to live-test the company's software using Ionic and Angular, successfully developing and launching a new mobile application.• Collaborated with the marketing and UX departments to pinpoint areas for improvement using JavaScript, Angular, HTML, CSS, UX Qualitative & Quantitative researches, resulting in a comprehensive overhaul of the company's web image.• Played a key role in breaking down a monolithic architecture into microservices, improving scalability and flexibility.• PHP • Symfony • Laravel • PHPUnit • JavaScript • TypeScript • Angular • Karma • Jasmine • Ionic • Bamboo • SonarQube Show less -
Fullstack DeveloperSmart Gamma Jun 2014 - May 2015Uzhhorod, Zakarpattya, Ukraine• Led the development of e-commerce products with Symfony, delegated tasks to junior colleagues, and provided guidance to ensure best practices, resulting in the successful delivery of high-quality products.• Optimized database queries using MySQL, Doctrine and Symfony, achieving significant performance increase and reducing the number of queries.• Integrated CI/CD pipelines using Jenkins, conducted pull requests, code reviews, and unit/integration/e2e testing using PHPUnit, Behat… Show more • Led the development of e-commerce products with Symfony, delegated tasks to junior colleagues, and provided guidance to ensure best practices, resulting in the successful delivery of high-quality products.• Optimized database queries using MySQL, Doctrine and Symfony, achieving significant performance increase and reducing the number of queries.• Integrated CI/CD pipelines using Jenkins, conducted pull requests, code reviews, and unit/integration/e2e testing using PHPUnit, Behat, Selenium, and PhantomJS, streamlining the development and deployment process.• Effectively planned and organized project tasks using Jira, achieving no missed deadlines, high velocity, and fast delivery speed.• Managed client communications for major projects, resulting in positive, stable long-term relations.• PHP • Symfony • Behat • Selenium • PhantomJS • PHPUnit • Jenkins • Capifony • Python • JavaScript • PHPCR • Jenkins Show less -
Backend EngineerCrystalwebstudio Feb 2012 - Jun 2014Uzhgorod, Ukraine• Developed an in-house CMS using PHP and Symfony, providing a tailored solution for managing website content.• Engineered web architectures using PHP, Symfony, Laravel, and JavaScript for both small websites and large e-commerce products, ensuring scalability and performance.• Designed minimalistic, user-friendly, dynamic, and intuitive interfaces using JavaScript, TypeScript, and Angular, enhancing user experience and engagement.
Denis Rolya Skills
Denis Rolya Education Details
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Uzhgorod National UniversityApplied Mathematics -
Harvardx100
Frequently Asked Questions about Denis Rolya
What company does Denis Rolya work for?
Denis Rolya works for Detalex Gmbh
What is Denis Rolya's role at the current company?
Denis Rolya's current role is Engineering Lead.
What schools did Denis Rolya attend?
Denis Rolya attended Uzhgorod National University, Harvardx.
What are some of Denis Rolya's interests?
Denis Rolya has interest in Psychology, Sociology, Economics, Biology, Have Interests In Physics.
What skills is Denis Rolya known for?
Denis Rolya has skills like Project Management, Symfony2, Angularjs, Laravel, Php, Node.js, Html5, Css3, Mysql, Orm, Mean Stack, Linux.
Who are Denis Rolya's colleagues?
Denis Rolya's colleagues are Dietmar Hamm, Martin Burlyk.
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Denis Rolya
Warsaw -
1gmail.com
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