Principal Full Stack Software Engineer

We are looking for a highly experienced, hands-on Principal Full Stack Software Engineer to lead the design, modernization, and delivery of enterprise Direct Marketing digital platforms.

This role will play a key part in shaping scalable, secure, and innovative solutions that support customer-facing services, Direct Marketing agencies, partner channels, call center operations, customer acquisition, lead management, and servicing capabilities.

Key Responsibilities

• Lead solution architecture, technical design, and modernization roadmap activities across Direct Marketing platforms and related digital ecosystems.
• Convert business needs into scalable, secure, and maintainable technology solutions aligned with enterprise architecture, security, compliance, and operational standards.
• Drive end-to-end full stack engineering across front-end, back-end, APIs, integrations, databases, cloud platforms, DevOps, CI/CD, testing, deployment, and production support.
• Remain actively hands-on through coding, troubleshooting, code reviews, performance tuning, quality improvement, and complex technical issue resolution.
• Lead AI and Generative AI initiatives from PoC and pilot phases through production implementation, including the design and implementation of AI agents, agentic workflows, personalization, predictive analytics, agent-assist capabilities, content automation, conversational AI, and Copilot solutions.
• Partner effectively with business stakeholders, product owners, architects, project managers, vendors, and engineering teams, while communicating complex technical concepts clearly to both technical and non-technical audiences.

Requirements: Please describe the required competencies, including experience, skill sets, etc.

Required Experience and Skills

• 10+ years of software engineering experience in enterprise-scale environments, with a strong track record of leading full stack development and technical solutioning.
• Proven experience designing and delivering digital platforms for customers, Direct Marketing agencies, partners, call center operators, and internal business users.
• Strong hands-on engineering capability across solution design, coding, testing, deployment, production support, root cause analysis, performance tuning, security remediation, and complex issue resolution.
• Deep technical expertise in full stack development, solution architecture, system design, React/Angular/Vue.js, .NET/Java/Node.js/Python, APIs, integration, cloud platforms, databases, CI/CD, DevOps, security, performance, and scalability.
• Hands-on experience designing and implementing AI/ML, Generative AI, AI agents, agentic workflows, conversational AI, or Copilot-based solutions from PoC and pilot phases through production implementation; experience with Microsoft Copilot, Azure AI Services, Azure OpenAI/OpenAI, MarTech, CRM, CDP, marketing automation, or similar platforms is preferred.
• Ability to work effectively in Agile, global, and cross-functional environments; cloud, AI, or architecture certifications are a plus.
• Business-level English and Japanese communication skills are required; Japanese proficiency equivalent to JLPT N2 or above is expected.

Key Competencies: Technical leadership, full stack engineering, solution architecture, AI/Generative AI implementation, AI agent development, hands-on delivery, platform modernization, structured problem solving, stakeholder engagement, and business/technology alignment.

Success Profile: The ideal candidate is a senior technical leader who can set architectural direction, drive AI-enabled innovation, and personally contribute to high-quality software delivery for modern digital solutions supporting customers, Direct Marketing agencies, and call center operations.