Frontend Engineer（Senior）

Back to Job Listings 日本語の求人票はこちら About Us Macromill is a leading company in the fields of online research and marketing research. We leverage internet-based survey data and consumer purchase behavior insights to help our clients better understand consumer needs and behavior, enabling them to craft more effective marketing strategies. To achieve further growth and transformation, Macromill is revitalizing its systems, building a robust data infrastructure powered by cutting-edge technology to deliver faster and more accurate marketing research solutions, ultimately driving growth for our clients.

To realize this vision, we are actively strengthening our engineering team and are looking for individuals passionate about developing advanced systems and data-driven platforms. We embrace agile development, machine learning, IaC, and other modern technologies, fostering a flexible, dynamic environment for fast and efficient service delivery.

If you’re excited about connecting businesses and consumers through data and driving transformative impact in business, or if you’re eager to take on new technologies and lead system advancements, we invite you to join us in building the future of Macromill.

About the Job

We are seeking a Senior Frontend Engineer to lead the development of frontend applications using the latest technologies, including TypeScript, React, and Next.js. In this role, you will provide technical guidance to the team on solving complex challenges and designing robust architectures. You will actively engage in code reviews, automated testing, and code quality improvements, fostering a high standard of code across the team.

You will also promote and introduce new processes and development methods, building a sustainable and scalable foundation for long-term maintainability. As a Senior Engineer, you will collaborate closely with Product Managers, Designers, and other development teams to propose and drive feature implementations aligned with business requirements. Additionally, you will contribute to elevating the technical maturity of the team through knowledge sharing, setting best practices, and promoting skill development.

We expect you to support not only the technical aspects but also the growth of the team as a whole, creating an environment that balances quality and efficiency.

Why Join Us

Work on cutting-edge front-end technologies to create impactful applications that drive business success. Contribute to a high-quality codebase by actively engaging in code reviews, automated testing, and process improvements. Collaborate with a talented team of product managers, designers, and engineers, fostering a culture of growth and shared knowledge.

Join a large-scale platform renewal project that provides opportunities to tackle new challenges and refine your skills. Be part of an Agile development environment that values teamwork, continuous learning, and performance improvement. Take ownership from design to development to testing, enhancing your technical skills and advancing your career path.

Enjoy an open and innovative culture, where team members are encouraged to research new technologies and make impactful contributions.

Technology Stack Front-End

TypeScript, React, Next.js, HTML, CSS, Storybook, Nx, GraphQL Others: GitHub, GitHub Actions, Jira, Slack, Teams Application Qualifications Minimum Qualifications 7+ years of experience with React and TypeScript Experience with HTML / CSS / JavaScript development Experience with CI/CD workflows Experience working in cross-functional teams with product managers and designers Self-motivated and able to work effectively as part of a team Conversational proficiency in both Japanese or English, with at least one language at the level to participate in engineering discussion.

Preferred Qualifications

Experience as a tech lead or team lead Experience with Agile development Understanding and experience with test automation Experience optimizing front-end performance Knowledge of software engineering best practices Understanding of accessibility Familiarity with design systems Who are we looking for Ability to write clean, maintainable code Strong team player with proactive communication skills Eager to research new technologies Passionate about improving services and making a positive impact through engineering Able to balance business, organizational, and technical considerations to provide technical guidance Able to collaborate with engineers and tech leads company-wide to shape the culture of the development team