Full-Stack Developer

Location
Czechia
Rate, USD
Not specified
Work schedule
Full Time,
Language skills
English
Available for Hire
Yes
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About me

I am a Full-Stack Developer with over 8 years of experience delivering robust systems using React, Node.js, and AI workflows. Throughout my career, I have focused on building AI-driven automation solutions, real-time dashboards, and end-to-end system delivery that significantly improve performance and business outcomes. My work has resulted in boosting compliance accuracy by 35%, automating 80% of support queries, and scaling platforms to over 4,000 users.

I have engineered advanced AI tools such as a GPT-4 Sales Call Evaluator used by more than 50 users, which increased compliance accuracy substantially. I also architected full-stack dashboards with live rule engines that reduced QA review time by 70%, and automated weekly call reviews using LangChain and Make.com workflows. My efforts in standardizing onboarding processes and QA documentation have reduced ramp-up time by 40%.

In previous roles, I launched OpenAI chatbots that automated the majority of client support queries and developed analytics dashboards that halved decision cycles. I optimized server-side rendering and hydration in Next.js with TypeScript, which increased mobile engagement by 30%. I have also facilitated product rollouts and GPT workflow training to boost cross-team adoption.

I designed scalable WebGL game interfaces supporting thousands of concurrent players and integrated NFT metadata using custom React hooks and IPFS, reducing latency by 40%. Additionally, I built 3D staking dashboards with TypeScript and Three.js, improving load speeds by 40%, and created automation APIs that enhanced accuracy by 60%. I have mentored junior developers, improving feature delivery times by 20%.

As a freelancer, I delivered multiple web applications for e-commerce and education clients, improving load speeds by 30-50% through React optimization and SSR strategies. I translated client business needs into scalable architectures using Node.js and PostgreSQL and secured repeat contracts through thorough post-launch documentation and support.

I am passionate about leveraging AI integration and automation to build efficient, scalable, and user-friendly applications. I thrive in agile environments and continuously seek to improve processes and deliver high-quality software solutions that drive business success.


Professional area



Education

2012 – 2016 Bachelor of Engineering @ Czech Technical University in Prague

Experience

12/2023 – 09/2025 AI Native Full-Stack Developer (React.js + Node.js) @ The @VA Group

Engineered GPT-4 Sales Call Evaluator for 50+ users, lifting compliance accuracy 35%. Architected a full-stack dashboard (React, FastAPI) with live rule engines, cutting QA review time 70%. Automated 100+ weekly call reviews via LangChain + Make.com workflows. Standardized onboarding with SOPs and QA process documentation, reducing ramp-up time 40%. Presented AI roadmap and integration plans to stakeholders, driving adoption strategy.

11/2021 – 10/2023 AI Integration Full-Stack Developer (React.js + Node.js) @ Sage-D Marketing

Launched an OpenAI chatbot automating 80% of client support queries. Developed analytics dashboards (React + Node.js) with filters, halving decision cycles. Optimized SSR & hydration in Next.js + TypeScript, increasing mobile engagement 30%. Facilitated product rollouts and GPT workflow training, boosting cross-team adoption.

01/2019 – 09/2021 Full-Stack Developer (React.js + Node.js) @ DeFiTankLand

Designed WebGL game interface (React.js + Node.js) scaling to 4,000+ concurrent players. Integrated NFT metadata via custom React hooks and IPFS, reducing latency 40%. Built 3D staking dashboard in TypeScript + Three.js, improving load speed 40%. Created automation APIs, improving accuracy 60%. Mentored 3 juniors, improving feature delivery time by 20%.

10/2016 – 12/2018 Freelance Full Stack Developer @ Self-Employed

Delivered 8+ web apps (React, Node.js, TypeScript) for e-commerce and education clients. Improved load speeds 30-50% with React optimization and SSR strategies. Translated client business needs into scalable architectures (Node.js + PostgreSQL). Secured 3 repeat contracts via post-launch documentation & support.


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