Orest Zelisko
Full Stack Engineer
Lviv, UA • -•-• www.linkedin.com/in/orest-zelisko
• orestzeliskoportfolio.vercel.app
Full Stack Developer with over 5 years of experience, delivering scalable web applications with
expertise in modern technologies, cloud platforms, and software engineering. Leveraging a strong
background in full stack development to design, develop, and deploy innovative solutions that meet
the needs of modern businesses. Proficient in a wide range of technologies, including JavaScript,
server-side languages, database management, cloud platforms, and DevOps practices. Proven
ability to work collaboratively in agile environments, driving innovation and delivering high-quality
software solutions that meet the highest standards of quality and reliability.
WORK EXPERIENCE
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Freelancer
April 2024 – Present
Upwork, US
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Successfully developed and delivered a complex trading graph project using
Python in a remarkably short timeframe, demonstrating both efficiency and
strong technical skills in data visualization and financial analysis. Python was
used to handle data processing, while PineScript allowed for the creation of
dynamic and customizable financial charts. This project showcased advanced
data manipulation and visualization techniques, resulting in clear, actionable
insights for traders.
Designed and implemented a comprehensive full-stack forex currency trading
platform, utilizing the MERN stack (MongoDB, Express, React, Node.js). The
project was completed within one month and involved integrating real-time forex
data for accurate market analysis. React was used to build a highly responsive
user interface, ensuring an intuitive trading experience, while Node.js and
Express handled the backend logic and API integration. MongoDB was employed
to manage large volumes of trade data, ensuring fast and reliable performance,
all while meeting strict client specifications.
Full Stack Engineer
May 2021 – April 2024
Lition Corp, Berlin, Germany
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Achieved consistent profitability, and successfully maintained a profitable trading
record for the team, generating about 120% return on investment annually.
Utilized Node.js to build efficient, high-performance backend systems that
handled large volumes of data and provided real-time insights into market
movements. Automated key processes, ensuring stable and profitable trading
operations.
Implemented automated trading systems by designing and deploying trading
algorithms and backend solutions, increasing trading efficiency by 30% and
reducing the manual workload. Leveraged Next.js to create user-friendly, serverrendered web applications for monitoring and managing trades. Utilized Git for
version control and integrated DevOps practices to ensure continuous
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deployment and smooth operation of the trading systems.
Developed trading strategies by analyzing market trends and implementing
proprietary algorithms tailored to specific market conditions. These strategies
provided the team with a 15% competitive advantage, enhancing decisionmaking and ensuring an edge in the highly dynamic trading environment.
Backend Engineer
August 2020 – May 2021
Berkeley Square Inc, London, UK
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Designed and implemented a new engine algorithm that reduced computation
time by 40% in the core protocol. Leveraged Node.js for building a fast, nonblocking environment, ideal for handling multiple concurrent operations efficiently.
The data was stored and managed using MongoDB, a NoSQL database that
provided flexibility and scalability, ensuring high performance and quick access to
large datasets.
Optimized a critical path algorithm in the management system, focusing on
improving the efficiency of key operations by applying advanced data structures
and refining the algorithm logic. This resulted in a 25% boost in operational
efficiency and a significant reduction in overall costs, allowing the system to
handle more tasks with fewer resources.
Conducted A/B testing on machine learning algorithms for recommendation
systems, utilizing AWS infrastructure for scalable and reliable testing
environments. The A/B testing framework allowed for careful analysis of different
algorithm versions, leading to a 15% increase in recommendation accuracy. The
use of AWS provided the computational power needed to handle large-scale data
processing and testing.
Frontend Developer
December 2019 – August 2020
Nagarro Inc, California, US
• Conducted in-depth analysis of transaction data in e-commerce platforms,
leveraging React to create dynamic, responsive user interfaces that improved
user interaction. Ant Design was used to build clean, intuitive components,
ensuring a consistent and professional look across the platform. These efforts led
to a 15% improvement in transaction efficiency by streamlining processes and
enhancing the user experience.
• Developed automated reporting processes for financial systems using Python for
data manipulation and SQL for database management. These technologies
allowed for efficient handling of large datasets, ensuring faster and more
accurate reporting. By integrating Laravel for the backend, I created a robust
framework that supported seamless interaction with the database, while Vue.js
was employed on the frontend to build a smooth and interactive user interface
for generating reports. This resulted in a 30% reduction in report generation time
and improved data accuracy.
• Designed and launched interactive visualizations and real-time dashboards for
tracking key performance metrics, using Next.js to build server-side rendered
web applications with excellent performance and SEO optimization. On the
backend, NestJS was utilized to manage complex business logic, offering a
scalable and efficient structure for handling data. These dashboards allowed for
real-time insights and improved decision-making in both financial and ecommerce systems, reducing feature development time by 30%.
EDUCATION
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Kyiv National University of Technologies and Design, Kyiv, UA
Bachelor of Science — IT
SKILLS & OTHER
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• Frontend: HTML, CSS, Responsive Design, SCSS, SASS/LESS, Bootstrap, Ant
Design, Tailwind, JavaScript, TypeScript, React, Vue, Next, Nest
• Backend: PHP, Laravel, Node, Python, Go, Rust
• Databases: MySQL, PostgreSQL, SQLite, MongoDB, Database Design
• APIS: RESTful API Development, GraphQL, API Integration
• Methodologies: Agile, Scrum, Leadership and Team Management
• Other: WebSockets, JWT, Docker, Kubernetes, Azure, Testing (Jest, Mocha, Chai),
Algorithms and Data Structures, DevOps practices, AWS (Amazon Web Services),
Git, GitHub/GitLab, Vercel, Webpack
CERTIFICATES
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• Certified Web Professional - Web Developer (CWP)
• React.js Certification by Coursera
• Node.js Certified Developer (JSNAD)
