Senior Full Stack Developer | React / Next.js / TypeScript

About Blazity

At Blazity, we are a team of experienced software engineers and AI practitioners building modern digital products, AI-powered solutions and digital experiences for companies worldwide.

We work with international clients on projects ranging from large scale enterprise migrations and platform development to greenfield products and long term maintenance.

Our projects are built around modern technologies such as React, Next.js, TypeScript, Node.js and Vercel. We also work with modern headless CMS platforms, cloud technologies and AI tools that are becoming an increasingly important part of software development.

We believe good engineers today should be comfortable working with AI. This doesn't mean being an AI specialist. It means knowing how to use AI tools effectively, being curious about new development approaches and understanding where AI can genuinely improve the way we build software and deliver value to clients.

We are looking for a Senior Full Stack Developer who combines strong engineering skills with an AI mindset, can take ownership of technical solutions and enjoys working on international projects.

About the Role

As a Senior Full Stack Developer, you will work on international projects where you can have a direct impact on the technology and the way products are built.

Our current project pipeline includes large scale enterprise migrations, migrations from Webflow to Next.js and Vercel, greenfield digital products and long term maintenance of existing applications.

Depending on the project, you may work on:

• Large scale migrations of enterprise websites and platforms.

• Migration from Webflow to Next.js and Vercel.

• Development of new digital products from scratch.

• Headless CMS implementations using technologies such as Sanity or Hygraph.

• Building and maintaining production applications.

• Frontend architecture and performance.

• Backend development and API integrations.

• Cloud infrastructure and deployment.

• Long term product development and maintenance.

You will work directly with international clients and collaborate with our developers and technical leads. The role offers a high level of ownership and the opportunity to influence technical decisions.

What You Will Do

• Design and develop production web applications using React, Next.js and TypeScript.

• Take ownership of features and technical areas.

• Participate in architecture and system design.

• Lead technical decisions within your area of responsibility.

• Work on migrations from existing technologies to modern web architectures.

• Build and maintain integrations and APIs.

• Work with headless CMS platforms.

• Work with Vercel and cloud infrastructure.

• Use AI tools as part of your everyday development workflow.

• Improve application performance, reliability and maintainability.

• Review code and provide technical feedback.

• Support and mentor other developers.

• Investigate complex technical problems and propose solutions.

• Work directly with international clients on technical requirements and solutions.

• Contribute to technical estimates and project planning when needed.

What We're Looking For

• 5+ years of professional software development experience.

• Strong experience with React.

• Strong experience with Next.js.

• Strong knowledge of TypeScript.

• Solid experience with Node.js and backend development.

• Good understanding of modern web application architecture.

• Experience building and maintaining production applications.

• Experience with APIs and integrations.

• Experience working with cloud platforms and modern deployment workflows.

• Ability to take ownership of technical solutions.

• Experience participating in architecture and technical decision making.

• Ability to communicate technical topics clearly in English.

• Experience working with international clients is strongly preferred.

AI Mindset

You don't need to be an AI engineer, but we expect you to be comfortable with AI assisted development and interested in how AI can change the way software is built.

• Experience using tools such as Claude, ChatGPT, GitHub Copilot or similar in your development workflow.

• Understanding of where AI can genuinely improve software development.

• Willingness to experiment with new AI tools and development approaches.

• Ability to combine AI assisted development with strong engineering judgement.

• Interest in AI powered products and new ways of building software.

• Willingness to keep learning as AI development tools and practices evolve.

Nice to Have

• Experience with Vercel.

• Experience with Sanity, Hygraph or other headless CMS platforms.

• Experience migrating websites or applications from Webflow or other existing technologies.

• Experience with AWS.

• Experience with Infrastructure as Code, including Terraform.

• Experience with observability tools such as Datadog, CloudWatch or New Relic.

• Experience with frontend performance and Core Web Vitals.

• Experience with design systems and modern frontend architecture.

• Experience with CI/CD and automated testing.

• Experience delivering projects for enterprise clients.

• Previous experience as a technical lead or taking technical ownership within a team.

• Experience working on AI powered products.

What Makes Blazity Special?

• International projects and clients.

• Opportunity to work on enterprise migrations, greenfield products and long term development projects.

• Modern technology stack.

• AI is part of our everyday development workflow.

• 100% remote work from Poland.

• Direct collaboration with international engineering teams.

• Direct contact with clients and influence on technical decisions.

• Opportunity to take technical ownership without moving away from software development.

• Variety of projects across different industries and technologies.

• Private healthcare fully covered by us.

• Sports card fully covered by us.

• 29 paid days off.

• Team gatherings and social events.

Details

Contract: B2B
Rate: 120–160 PLN net + VAT per hour, depending on experience
Location: 100% remote from Poland