Principal Full Stack Software Engineer

Description and Requirements
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.
福利厚生
メットライフ生命では、ワークライフバランスと社員の心身の健康を促進する福利厚生を提供しています。社員はフレックスタイム制度、年次有給休暇、特別連続休暇、リフレッシュ休暇等の休暇を利用できます。また、社会保険や団体保険の他、旅行や英会話教室で使える割引も提供しています。柔軟に働けるよう、オフィス勤務と在宅勤務を組み合わせた勤務形態の導入や、短時間勤務制度、また柔軟性のあるドレスコードなども設けています。
Benefits We Offer
MetLife Japan offers a comprehensive benefits package that promotes work-life balance and employee wellbeing. Employees can take advantage of flex time policy and a generous time-off policy, national holidays, annual paid leave, special consecutive leave, and refreshment leave. We also provide full social insurance coverage, a commuting expense reimbursement, group insurance, and discounts on travel and English language lessons. To support work flexibility, employees also have hybrid work options, shortened working hours for parents with children in third grade or below, and a casual dress code.
メットライフについて
メットライフは、グローバルで展開する金融サービス企業です。個人および法人のお客さまがより確かな未来を築けるよう、保険、年金、社員福利厚生給付、資産管理のサポートを提供しています。1868年に創業したメットライフは、世界40以上の市場で事業を展開し、米国、アジア、中南米、ヨーロッパ、中東において業界をリードしています。
メットライフ生命は、日本初の外資系生命保険会社として、1973年2月に国内での営業を開始しました。当社のPurpose「ともに歩んでゆく。よりたしかな未来に向けて。」は、メットライフが誇るグローバルネットワークと世界中のベストプラクティスを活かし、お客さまのニーズに応え、地域社会との信頼関係を築くという信念を表しています。
メットライフは、New Frontier戦略の一環として、AIを活用し、人を中心に据えた未来を築いています。私たちは、AIを活用して顧客へのサービス向上、地域社会への支援、そして働き方の変革を推進していく中で、好奇心、適応力、そして成長意欲を持つ人材を求めています。メットライフにおいて、AIは、人間の判断力、創造性、継続的な改善を支える責任あるパートナーであり、信頼、インクルージョン、そして長期的な価値の構築に貢献しています。About MetLife
About MetLife
MetLife Inc., through its subsidiaries and affiliates (MetLife), is one of the world's leading financial services companies, providing insurance, annuities, employee benefits and asset management to help individual and institutional customers build a more confident future. Founded in 1868, MetLife has operations in more than 40 markets globally and holds leading positions in the United States, Asia, Latin America, Europe and the Middle East.
As part of our New Frontier strategy, MetLife is building an AI-enabled, people-centered future. We're looking for people who bring curiosity, adaptability, and a growth mindset as we use AI to enhance how we serve customers, support communities, and evolve the way work gets done. At MetLife, AI is a responsible partner that supports human judgment, creativity, and continuous improvement while helping us build trust, inclusion, and long-term value.
MetLife Japan began operations in February 1973 as Japan's first foreign-owned life insurance company. Our purpose, "Always with you, building a more confident future," encapsulates our strong commitment to leveraging our global network and best practices worldwide to stand with our customers and build trust with our communities.
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