Senior Software Engineer | Frontend, Performance & Design Systems Expert

Lisbon, Portugal • dmitri.karasjov@gmail.com • LinkedIn Profile

Professional Profile

Frontend-focused software engineer with over 9 years of experience in building scalable web applications and comprehensive design systems. Expert in TypeScript, React, Node.js, Next.js, GraphQl, Tailwind. ****I excel at solving deep technical challenges, from optimising critical-path performance to managing complex application states. My approach prioritises maintainable, clean code and modular architecture to ensure long-term scalability. Adept at bridging the gap between complex frontend logic and backend services to deliver cohesive, high-performance web applications.

Technical Expertise

• Frontend: React, Next.js, TypeScript, Tailwind, GraphQL
• Backend & Infra: Node.js, Elixir (Phoenix, LiveView), PostgreSQL, AWS (S3, Lambda, CloudFront)
• Tools: Figma, Github, VS Code, Browser DevTools
• Core Competencies: Frontend Engineering, Design Systems, Frontend Architecture, Performance Optimisation, Complex State Management, Mentorship

Professional Experience

Yolo Group | Senior Software Engineer | May 2023 – Nov 2025

• Architected and developed high-performance WYSIWYG platform for dynamic landing page creation, enabling non-technical stakeholders to deploy web assets rapidly.
• Engineered a centralised library of reusable UI components, ensuring visual consistency and reducing time-to-market for new features.
• Defined engineering workflows and authored technical documentation to standardise frontend excellence in the team.

Yolo Group | Tech Lead / Senior Frontend Engineer | Apr 2018 – May 2023

• Led the development of the customer chat, email and ticketing support system “Comms” utilised by thousands of active users.
• Developed internal design systems and UI libraries, collaborating directly with Design and Product teams to align UX patterns across multiple projects.
• Optimised developer productivity by implementing advanced tooling and automation, significantly reducing build times and deployment friction.
• Mentored cross-functional team, fostering a culture of technical growth and thoughtful architectural decisions.

Pipedrive | Frontend Engineer | Jan 2017 – Apr 2018