• You will be challenged with developing features for the flea market app "Mercari," the smartphone payment service "Merpay," and the cryptocurrency/blockchain service "Mercoin" within Japan. • You will join a team of software engineers with diverse backgrounds and expertise and take on responsibilities as a team member. • You will be involved in projects aimed at improving the user experience (UX) and specifications from the customer's perspective for Mercari, Merpay, and Mercoin. • You will engage with the technology and data firsthand and produce tangible outputs. • Ultimately, you will present your work and actual results at a final report meeting. • During this internship, you will work to develop actual features integrated into the app and to improve the operation of the app. • At Mercari Group, you will be able to take on bold challenges without any fear of failure. What’s more, you will be able to flexibly choose the latest and optimal technologies, and because we foster an environment and culture that supports independent decision-making, the experience will offer an opportunity for both personal and professional growth.

• Design, develop, and maintain full stack features using Node.js, React.js, and Next.js • Build and optimize backend services and APIs with Node.js • Work with PostgreSQL to design schemas, write efficient queries, and improve performance • Develop responsive and performant frontend applications using React, Redux, and Redux-Saga • Collaborate with cross-functional teams to understand requirements and deliver solutions • Write clean, maintainable, and well-tested code • Participate in code reviews and contribute to engineering best practices • Debug, troubleshoot, and resolve production issues

• define the software architecture and contribute to developing the next generations of lithography systems, driving innovation in the semiconductor industry • find optimal solutions for embedded systems while addressing constraints such as system, hardware, and performance requirements • analyze system requirements, collaborate on technical specifications, and propose and decide on solutions together with the team • define the technology stack and critical interfaces • communicate effectively with internal and external stakeholders, including software developers, Product Owners, and electronics teams

Join a dynamic team at the pulse of global markets, where we deliver innovative software and service solutions for essential financial reporting and capital markets transactions. At DFIN, we are a values-driven organization that empowers you to build a fulfilling career while bringing your authentic self to work every day. Our "Win as One" mentality ensures that our team's success is directly linked to Client, Shareholder and Employee Satisfaction. Recognized as one of AMERICA'S MOST LOVED WORKPLACES® for five consecutive years and a Built In Best Places to Work for six years, we are committed to our employees' total well-being. Enjoy competitive compensation, a flexible workplace, comprehensive benefits, and opportunities for professional growth. Bring your passion and talents to DFIN - because being YOU thrives here. Summary: Works directly with clients to develop comprehensive plans for coordinating the production of client documents, electronic SEC (Securities and Exchange Commission) filings, and print materials. The role is responsible for achieving service agreement objectives, ensuring compliance with customer expectations, company policies, profitability, and quality standards. By understanding the client's business needs, the incumbent fosters strong customer relationships, monitors satisfaction, and provides consultative support alongside the sales team. Participation in sales presentations and client meetings may also be required in supporting capacity. The role has primary accountabilities for all stages of service delivery, including composition, manufacturing, and final distribution of customer products. Responsibilities: Serve as the primary liaison for customers associated with designated accounts. Manage and coordinate projects for both new and existing clients, ensuring positive client experience and facilitating effective engagement with DFIN. Independently oversee accounts and client projects, diligently tracking project progress through all production phases to ensure deliverables align with both client specifications and organizational standards. Collaborate with customers to collect job requirements, translate them into comprehensive workflow instructions, and oversee workflow execution across multiple customer projects. Delegate responsibilities to contracted vendor partners Complete all delegated responsibilities in a timely and thorough manner. Mentor and train Service Delivery Associates. Review the work of Account Associates to confirm all information is complete and accurate prior to starting composition, placing print orders, or submitting online EDGAR filings. Pursue ongoing education and training in emerging DFIN Services platforms and technologies as they are introduced to enhance service offerings. Assume leadership duties as needed in response to situational demands. Qualifications: 5+ years of experience in customer advocacy, post-sales support, or related roles such as professional services, consulting, project management, or account management. High level of proficiency in EDGAR, XBRL, document knowledge, print and transactional paths including knowledge around the DFIN ecosystem (SaaS platform ArcPro, ArcReporting) along with other client offerings. Consistently meet deadlines and make fast, data-driven decisions to boost team performance. Highly adaptable to changing internal and external conditions. Must be able to work independently and be a team player. Requires strong organizational skills and the ability to manage multiple projects. Handles stress effectively. Excellent written and verbal communication, especially with clients. Demonstrated ability to collaborate effectively and drive solutions while consistently delivering results across all levels of management and internal stakeholders. A goal-oriented team leader with a strong track record of excelling in collaborative environments. Skilled in preparing materials and delivering presentations to diverse audiences. Proficient in Microsoft Suite (Word, Excel, PowerPoint, PowerBI, PowerApps), Salesforce, and DFIN proprietary software (Profile, ESP). Skilled at improving workflows and driving process efficiency. It is the policy of Donnelley Financial Solutions to select, place, and manage all its employees without discrimination based on race, color, national origin, gender, age, religion, actual or perceived disability, veteran status, actual or perceived sexual orientation, genetic information or any other protected status. 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