Open to opportunities

Danylo Tokar

@danylotokar

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Full-Stack Developer specializing in React, Node.js, and AI-driven automation.

Czechia

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What I'm looking for

I seek a role building AI-driven full-stack products with strong engineering practices, clear documentation, and opportunities to lead integrations and mentor teammates.

I am a Full-Stack Developer with 8+ years building production systems using React and Node.js, focused on AI integration and automation that improves business outcomes.

I engineered GPT-4-driven tools and dashboards that increased compliance accuracy by 35% and automated large volumes of call and support reviews, cutting QA and decision cycles substantially.

I have built scalable front-end experiences including WebGL and Three.js game interfaces for thousands of concurrent users, optimized SSR/TypeScript applications to boost engagement, and created backend APIs and architectures using PostgreSQL and Node.js.

I prioritize standardized onboarding, documentation, and cross-team adoption while mentoring junior engineers and delivering repeatable, performant solutions that reduce ramp time and accelerate feature delivery.

Experience

Work history, roles, and key accomplishments

Full-Stack Developer

The @VA Group

Dec 2023 - Sep 2025 (1 year 9 months)

Engineered a GPT-4 sales call evaluator used by 50+ users, increasing compliance accuracy 35% and automated 100+ weekly call reviews with LangChain and Make.com; reduced QA review time 70% and ramp-up time 40% through SOPs and onboarding standardization.

React fastAPI GPT 4 Lang Chain Make Automation Dashboarding QA Processes

Full-Stack Developer

Sage-D Marketing

Nov 2021 - Oct 2023 (1 year 11 months)

Launched an OpenAI chatbot that automated 80% of client support queries and built analytics dashboards halving decision cycles; optimized Next.js SSR and hydration to boost mobile engagement 30% and drove GPT workflow training for cross-team adoption.

React Next.js TypeScript OpenAI Chatbot Dashboards Workflows

Full-Stack Developer

DeFiTankLand

Jan 2019 - Sep 2021 (2 years 8 months)

Designed a WebGL game interface scaling to 4,000+ concurrent players and integrated NFT metadata via IPFS, reducing latency 40%; built a 3D staking dashboard improving load speed 40% and created automation APIs increasing accuracy 60%.

React TypeScript WebGL IPFS NFT APIs Performance Optimization

Full-Stack Developer

Self Employed

Oct 2016 - Dec 2018 (2 years 2 months)

Delivered 8+ web applications for e-commerce and education clients using React, Node.js, and TypeScript; improved load speeds 30-50% with React optimizations and SSR and secured repeat contracts via post-launch documentation and support.

React Node TypeScript Performance Optimization PostgreSQL API Design Client Engagement