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I am a Senior Software Engineer specializing in the React + Node.js stack, designing and delivering end-to-end web applications that combine elegant user interfaces with scalable, high-performance backend systems. I thrive in frontend architecture, backend API development, and cloud-native deployment, with a strong commitment to writing maintainable, modular, production-ready code. I’ve led design-system initiatives, API orchestration, and CI/CD automation, always aiming for reliability and scalability. I work across the full modern web stack—designing REST and GraphQL APIs, building responsive React + TypeScript frontends, and deploying Node.js microservices on Docker, AWS, and Kubernetes. I emphasize clean architecture and developer efficiency, collaborating closely with product managers, designers, and DevOps to align technical decisions with user experience and business outcomes. I’m passionate about innovation, web performance, and AI-assisted automation, and I aim to create developer-centric systems that harmonize UI richness with robust backend capabilities.…I am a Senior Software Engineer specializing in the React + Node.js stack, designing and delivering end-to-end web applications that combine elegant user interfaces with scalable, high-performance backend systems. I thrive in frontend architecture, backend API development, and cloud-native deployment, with a strong commitment to writing maintainable, modular, production-ready code. I’ve led design-system initiatives, API orchestration, and CI/CD automation, always aiming for reliability and scalability. I work across the full modern web stack—designing REST and GraphQL APIs, building responsive React + TypeScript frontends, and deploying Node.js microservices on Docker, AWS, and Kubernetes. I emphasize clean architecture and developer efficiency, collaborating closely with product managers, designers, and DevOps to align technical decisions with user experience and business outcomes. I’m passionate about innovation, web performance, and AI-assisted automation, and I aim to create developer-centric systems that harmonize UI richness with robust backend capabilities.

Hiroshi Iwasaki

Full Stack Developer, Web Developer, Developer, +5

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I am a Senior Software Engineer specializing in the React + Node.js stack, designing and delivering end-to-end web applications that combine elegant user interfaces with scalable, high-performance backend systems. I thrive in frontend architecture, backend API development, and cloud-native deployment, with a strong commitment to writing maintainable, modular, production-ready code. I’ve led design-system initiatives, API orchestration, and CI/CD automation, always aiming for reliability and scalability. I work across the full modern web stack—designing REST and GraphQL APIs, building responsive React + TypeScript frontends, and deploying Node.js microservices on Docker, AWS, and Kubernetes. I emphasize clean architecture and developer efficiency, collaborating closely with product managers, designers, and DevOps to align technical decisions with user experience and business outcomes. I’m passionate about innovation, web performance, and AI-assisted automation, and I aim to create developer-centric systems that harmonize UI richness with robust backend capabilities.…I am a Senior Software Engineer specializing in the React + Node.js stack, designing and delivering end-to-end web applications that combine elegant user interfaces with scalable, high-performance backend systems. I thrive in frontend architecture, backend API development, and cloud-native deployment, with a strong commitment to writing maintainable, modular, production-ready code. I’ve led design-system initiatives, API orchestration, and CI/CD automation, always aiming for reliability and scalability. I work across the full modern web stack—designing REST and GraphQL APIs, building responsive React + TypeScript frontends, and deploying Node.js microservices on Docker, AWS, and Kubernetes. I emphasize clean architecture and developer efficiency, collaborating closely with product managers, designers, and DevOps to align technical decisions with user experience and business outcomes. I’m passionate about innovation, web performance, and AI-assisted automation, and I aim to create developer-centric systems that harmonize UI richness with robust backend capabilities.

Available to hire

I am a Senior Software Engineer specializing in the React + Node.js stack, designing and delivering end-to-end web applications that combine elegant user interfaces with scalable, high-performance backend systems. I thrive in frontend architecture, backend API development, and cloud-native deployment, with a strong commitment to writing maintainable, modular, production-ready code. I’ve led design-system initiatives, API orchestration, and CI/CD automation, always aiming for reliability and scalability.

I work across the full modern web stack—designing REST and GraphQL APIs, building responsive React + TypeScript frontends, and deploying Node.js microservices on Docker, AWS, and Kubernetes. I emphasize clean architecture and developer efficiency, collaborating closely with product managers, designers, and DevOps to align technical decisions with user experience and business outcomes. I’m passionate about innovation, web performance, and AI-assisted automation, and I aim to create developer-centric systems that harmonize UI richness with robust backend capabilities.

Skills

Experience Level

Expert

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Language

English

Fluent

Polish

Beginner

Japanese

Fluent

Work Experience

Senior Full-Stack Developer at Stepes

May 1, 2020 - Present

Led design, development, and maintenance of scalable web and mobile platforms using React.js, Next.js, React Native, and backend frameworks including Node.js, NestJS, and Fastify, supporting millions of high-performance transactions globally. Built modular and accessible frontend architectures applying atomic design principles and WCAG compliance. Implemented advanced data/state management techniques with React Query, React Hooks, Zustand, and Redux. Architected scalable microservices and secure REST/GraphQL APIs with Fastify, enforcing schema validation and role-based access control. Developed fault-tolerant AWS Lambda job orchestration with retry mechanisms. Integrated critical third-party payment services such as Stripe and PayPal with secure payment flows. Designed CI/CD pipelines using GitHub Actions, CircleCI, Docker, and Kubernetes, and deployed infrastructure using Terraform and AWS EKS/EC2. Championed full-stack automated testing with Jest, Mocha, Cypress, and Detox while ment

Full-Stack Developer at Vortex Digital

April 30, 2020 - August 5, 2025

Delivered domain-specific fintech and analytics solutions using Next.js, React.js, and NestJS with feature-rich routing and modular full-stack architecture. Built WebSocket gateways and GraphQL subscriptions for real-time data streaming. Developed dynamic visualizations using D3.js and Chart.js for live trading dashboards. Designed scalable UI libraries with React hooks and headless components. Created WCAG compliant responsive interfaces using Tailwind CSS and SCSS. Engineered async job pipelines and serverless event-driven architectures with AWS Lambda and Firebase Cloud Functions. Managed containerized deployments with Docker and Kubernetes with strong observability stacks including Prometheus and ELK. Followed TDD and DevOps workflows using GitHub Actions, Jest, and Cypress.

Frontend Web Developer at nomtek

December 31, 2016 - August 5, 2025

Contributed to client-facing web apps using HTML5, CSS3, JavaScript, and early React.js adoption delivering mobile-first and responsive UIs. Implemented reusable components and layouts ensuring branding consistency and cross-browser compatibility. Developed accessible interfaces aligning with WCAG guidelines. Assisted backend service development with Node.js, Express.js, REST APIs, and database querying. Supported design systems and component documentation with Storybook. Participated in Agile workflows, version control, and peer code reviews. Wrote unit and integration tests with Jest, Mocha, and Enzyme. Managed local development setups including Webpack, Gulp, and Docker for frontend testing.