Dario C.

Kotei is a consultancy firm specializing in full-stack web development and blockchain solutions. The company delivers robust, scalable software for clients across various industries by combining practical coding expertise with architectural guidance and technical consulting.

• Founded and led the consultancy, providing customized software solutions in fintech, e-commerce, and SaaS sectors.
• Offered architectural guidance and performed hands-on development for web and blockchain-based systems.
• Developed reusable, scalable components that improved performance, reduced maintenance, and facilitated future growth.
• Consulted with clients on backend optimization, frontend performance, and system reliability to ensure high-quality deliverables.
• Deployed infrastructure using AWS, Terraform, and serverless functions with a focus on long-term sustainability.
• Integrated GraphQL APIs, real-time data processing, and CI/CD workflows to enhance development efficiency.

Developing high-performance SaaS platforms with React, Next.js, and GraphQL, focusing on building scalable and maintainable front-end architectures. Working closely with backend teams to integrate REST APIs and GraphQL endpoints, ensuring seamless data interactions.

Key Contributions & Impact:

• Built and optimized front-end applications, improving UI performance and user experience.
• Developed reusable components to enhance consistency and maintainability across applications.
• Optimized data fetching and state management to increase efficiency and responsiveness.
• Improved overall application performance by refactoring code and applying best practices.

Leading the development of a decentralized real estate investment platform, integrating blockchain, smart contracts, and DeFi technologies to enable secure and fractional real estate ownership. Designed and optimized high-performance APIs, scalable infrastructure, and real-time investment mechanisms to support seamless user transactions.

Key Contributions & Impact:

• Built and optimized YieldBricks' DeFi infrastructure, integrating smart contracts and ERC-20 tokenization for fractional real estate investment.
• Developed scalable APIs to support yield distribution, staking, and secondary marketplace transactions.
• Implemented Web3 integrations to enable seamless blockchain interactions.
• Enhanced security and compliance by integrating KYC/AML solutions.
• Collaborated with cross-functional teams, aligning product, engineering, and blockchain strategies to improve platform performance.

Serapion is a technology solutions provider specializing in enterprise-grade applications across multiple industries, offering backend infrastructure and scalable cloud integrations.

• Built scalable backend systems using Node.js, NestJS, and PostgreSQL to support enterprise applications.
• Designed and deployed secure RESTful APIs that handled thousands of concurrent users with optimized query performance.
• Integrated Firebase Authentication to streamline secure user management and improve platform reliability.
• Utilized RabbitMQ for asynchronous messaging and job queueing, enhancing performance and service decoupling.
• Worked in an agile team environment, participating in sprint planning, code reviews, and DevOps workflows.
• Conducted advanced database query optimizations, reducing response times and increasing data throughput.
• Contributed to backend architecture refactoring to improve maintainability and scalability.

123 Design is a boutique software agency that provides customized digital solutions, especially for e-commerce, tourism, and content management clients.

• Designed and developed over 50 responsive and custom websites for small and medium-sized businesses and entrepreneurs using React.js, HTML/CSS, and WordPress.
• Applied SEO best practices and performance optimization techniques, resulting in notable increases in website traffic and user engagement.
• Created reusable UI components and ensured cross-browser compatibility for a smooth user experience.
• Managed direct communication with clients, gathered requirements, and coordinated project timelines with a focus on customer satisfaction.
• Supported the development of custom CMS solutions to increase scalability and improve content management for large, content-heavy websites.
• Introduced modern tools and practices such as TypeScript, ES6, and jQuery into legacy projects to improve maintainability.