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I am a Senior Full-Stack Engineer with 7+ years of experience building and scaling multi-tenant SaaS platforms using React, TypeScript, Node.js, PostgreSQL, Stripe, and cloud-native architectures. I deliver secure payment systems, subscription billing, and event-driven workflows while upholding reliability, security, and compliance. I have owned products from architecture through production deployment, conducted security reviews, optimized backend systems, and modernized AI-assisted codebases into maintainable production-ready applications. I enjoy collaborating directly with founders and stakeholders to launch revenue-generating SaaS products.…I am a Senior Full-Stack Engineer with 7+ years of experience building and scaling multi-tenant SaaS platforms using React, TypeScript, Node.js, PostgreSQL, Stripe, and cloud-native architectures. I deliver secure payment systems, subscription billing, and event-driven workflows while upholding reliability, security, and compliance. I have owned products from architecture through production deployment, conducted security reviews, optimized backend systems, and modernized AI-assisted codebases into maintainable production-ready applications. I enjoy collaborating directly with founders and stakeholders to launch revenue-generating SaaS products.

Artur Sato

Full Stack Developer, Web Developer, AI Engineer, +3

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I am a Senior Full-Stack Engineer with 7+ years of experience building and scaling multi-tenant SaaS platforms using React, TypeScript, Node.js, PostgreSQL, Stripe, and cloud-native architectures. I deliver secure payment systems, subscription billing, and event-driven workflows while upholding reliability, security, and compliance. I have owned products from architecture through production deployment, conducted security reviews, optimized backend systems, and modernized AI-assisted codebases into maintainable production-ready applications. I enjoy collaborating directly with founders and stakeholders to launch revenue-generating SaaS products.…I am a Senior Full-Stack Engineer with 7+ years of experience building and scaling multi-tenant SaaS platforms using React, TypeScript, Node.js, PostgreSQL, Stripe, and cloud-native architectures. I deliver secure payment systems, subscription billing, and event-driven workflows while upholding reliability, security, and compliance. I have owned products from architecture through production deployment, conducted security reviews, optimized backend systems, and modernized AI-assisted codebases into maintainable production-ready applications. I enjoy collaborating directly with founders and stakeholders to launch revenue-generating SaaS products.

Available to hire

I am a Senior Full-Stack Engineer with 7+ years of experience building and scaling multi-tenant SaaS platforms using React, TypeScript, Node.js, PostgreSQL, Stripe, and cloud-native architectures. I deliver secure payment systems, subscription billing, and event-driven workflows while upholding reliability, security, and compliance.

I have owned products from architecture through production deployment, conducted security reviews, optimized backend systems, and modernized AI-assisted codebases into maintainable production-ready applications. I enjoy collaborating directly with founders and stakeholders to launch revenue-generating SaaS products.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at Reaktor

April 1, 2023 - Present

Led design and implementation of real-time AI-enabled communications platforms, delivering low-latency interactions for chat and video/voice workflows. Built scalable backend services in Node.js and Python, with real-time messaging via WebSockets and WebRTC integration. Implemented AI features using OpenAI APIs, image generation, voice APIs, and AI chat systems to support dynamic content generation within user workflows. Employed event-driven architecture and asynchronous processing to maintain responsiveness under high throughput. Collaborated with product teams to define AI-native features, conducted code reviews, and enforced engineering best practices to improve maintainability and reduce bugs. Optimized performance and latency across services, improving perceived responsiveness. Built frontend interfaces in React/TypeScript with real-time synchronization to AI responses using WebSocket channels, delivering responsive user interactions. Deployed and maintained Dockerized services o

Senior Software Engineer at Netguru

July 1, 2020 - March 1, 2023

Frontend: React, TypeScript, Next.js, WebSockets; Backend: Node.js, Python, REST APIs; Real-time systems; AI integration with OpenAI APIs; Image generation, voice APIs, AI chat systems. Architected event-driven, asynchronous processing for scalable web applications. Implemented AI-driven features and integrated with backend services to deliver cohesive user experiences. Collaborated with product teams to align on features, performance goals, and maintainable code. Built scalable web apps and optimized frontend performance and accessibility.

Software Engineer at DeNA Shibuya

May 1, 2017 - December 1, 2019

Developed backend services and APIs supporting interactive applications. Designed data models and optimized system performance. Implemented a synchronous/asynchronous processing pipeline to improve scalability and integrated frontend and backend to deliver seamless user experiences. Collaborated with cross-functional teams to deliver scalable software solutions.

Senior Software Engineer at Reaktor Helsinki / Remote

April 1, 2023 - Present

Frontend: React, TypeScript, Next.js, WebSockets, UI/UX optimization. Backend: Node.js, Python, REST APIs, Real-time systems, WebRTC. AI Integration: OpenAI APIs, image generation, voice APIs, AI chat systems. Architecture: Event-driven systems, async processing, scalable web apps. Infra: Docker, AWS, CI/CD. Led design and built AI-driven real-time communications, improved latency and scalability, and conducted code reviews to uphold engineering standards.

Senior Software Engineer at Netguru Poznań

July 1, 2020 - March 1, 2023

Frontend: React, TypeScript, Next.js, WebSockets, UI/UX optimization. Collaborated with backend services (Node.js, Python) to deliver real-time features and AI-powered workflows. Implemented AI API integrations, contributed to scalable web apps, Dockerized services, and deployed via AWS and CI/CD pipelines.