Yurii Holodnyi

Richard Charles Senior Software & Full-stack Engineer Ottawa, ON, Canada- ABOUT ME Results-driven and detail-oriented Senior Software Engineer with over 8 years of hands-on experience in designing, developing, and maintaining robust web applications. Proven expertise in crafting responsive user interfaces using React and implementing scalable backend solutions with Node.js, Python. Adept at collaborating with cross-functional teams, contributing to product design, and ensuring code quality through rigorous testing and code reviews. Skilled in optimizing application performance and implementing the latest industry best practices for web security. Strong communication and teamwork abilities, with a commitment to delivering highquality software in Agile/Scrum environments. EXPERIENCE Senior Software Engineer Cognizant    2022/02 – 2024/03 Engineered and led the implementation of Format Preserving Encryption (FPE) algorithms into a web-based MVP, facilitating successful funding rounds by showcasing robust data protection for EHRs and other sensitive information. Mentored junior developers, fostering a collaborative team environment to improve project outcomes and accelerate the development using React and Django. Established continuous deployment practices that improved application reliability and speed to market, using tools like GitHub Actions and AWS CodePipeline. Project: Web Application for Secure Data Handling Developed using React and Django; included advanced security features and was integrated with Azure Cloud and SQL Server for optimized performance. Senior Full Stack Engineer Big Outsource    2018/07 – 2021/12 Led the front-end development team to build platform to input detailed medical records from diverse healthcare sources, using direct retrieval from institutions, patient portals, and electronic health exchanges. Implemented front-end technical solutions to meet project requirements for creation of 50 new web pages. Designed and implemented a complex healthcare API using Django, taking advantage of its modular architecture to maintain a clear separation of concerns among different service components.     Employed Jest for comprehensive unit and integration testing, reducing bugs by 40% and accelerating the QA cycle. Utilized Postman to streamline API development, improving endpoint security and response times through meticulous testing and iteration. Employed Agile methodologies to streamline project execution, which reduced the delivery timeframes by 25%. Implemented continuous integration/continuous deployment (CI/CD) pipelines using Jenkins and Docker, reducing system downtime and improving release cycles by 30%. Project: Healthcare Application Suite A series of applications designed to improve healthcare management; utilized React, ExpressJS and Azure Cloud to enhance scalability and user experience. Software Engineer Frontline Business Solutions        2017/06 – 2018/06 Spearheaded multiple client projects by implementing scalable web applications using React, Redux, TypeScript, and Django, Flask, Express, increasing client satisfaction by 35%. Led the end-to-end development of a customer-facing web application using React and ExpressJS, resulting in a 30% improvement in user engagement and a 20% increase in application speed. Collaborated closely with product managers and UI/UX designers to implement responsive and intuitive user interfaces, incorporating feedback to enhance the overall user experience. Conducted regular code reviews, providing constructive feedback to team members and ensuring adherence to coding standards and best practices. Introduced and integrated Cypress for end-to-end testing, reducing the number of postrelease bugs by 25% and improving the overall robustness of the application. Identified and resolved performance bottlenecks, optimizing API calls and enhancing application scalability by implementing caching strategies using Redis. Directed the migration of existing applications to AWS, leveraging services like EC2, S3, and RDS to enhance operational reliability and scalability. Project: Customer Engagement Portal Enhanced customer interaction through a bespoke portal, increasing engagement and improving data management practices. Software Engineer Intern Capital One     2016/08 – 2017/03 Developed and maintained real estate transaction management software, enhancing system reliability and efficiency by 40% through rigorous testing and updates. Developed and maintained user interfaces for multiple web applications using React, HTML, CSS, and modern JavaScript features, contributing to a 15% increase in overall user satisfaction. Developed several RESTful services to facilitate real estate transactions and customer interactions, using ExpressJS for its simplicity and fast setup. Collaborated in an Agile/Scrum environment, participating in sprint planning, daily stand-ups, and retrospectives to deliver high-quality software on time.  Implemented and maintained unit tests using Mocha, significantly reducing the number of bugs in the codebase and improving overall code quality. Project: Real Estate Transaction Tools Developed tools to automate and simplify property transactions, significantly improving operational efficiency and user satisfaction. EDUCATION The Baylor University (Sep 2012-May 2016) Bachelor’s degree, Computer Science SKILLS Programming Languages Testing frameworks C++, Java, Python, HTML5, CSS, JUnit, TestNG, Mockito, Jest, Mocha, JavaScript, TypeScript, JSON Cypress, Playwright Front-End Technology Management Tools Angular, React, Gatsby, Vue, Tailwind, Maven, Git, GitLab, BitBucket, Jenkins, MaterialUI, Ng-Bootstrap, Data Visualization Karma, CircleCI, Kafka, Docker, Kubernetes, (D3.js, Chart.js) Jira, Confluence Back-End Technology Code Quality and Best Practices Node.js, ExpressJS, Django, Flask, Clean Code, Code Reviews, Debugging SQLAlchemy, FastAPI, Spring Boot, Hibernate, JPA, REST APIs, Object- AI Technology Relational Model (ORM), J2EE, JSP Machine Learning, Natural Language Processing (NLP), Large Language Models Databases (LLMs), OpenAI, GPT4, GenAI, Pinecone MySQL, PostgreSQL, MongoDB, Oracle Web Security and Optimization Cloud & DevOps Security Best Practices, Performance Google Cloud Platform(GCP), Amazon Web Optimization Services(Amazon EC2, Amazon S3, Amazon EBS, AWS Lambda, CDK, SQS, EKS, AWS Aurora, DynamoDB), Microsoft Azure