Nexus Corporation
Lead Software Engineer
Skills
1 month ago
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Important information
Contract type:
Permanent
Location:
Tokyo, Japan
Work mode:
Onsite
Published on:
10 September 2026
What they need
Position: Lead Engineer (FinTech Platforms)
Overview Our client is seeking an experienced Lead Engineer to drive technical initiatives and oversee system operations for high-scale payment and marketing services. As their product offerings expand, our client is building a stronger engineering team to enhance system stability and user experience. In this role, you will take ownership of existing systems, make key architecture and code-level decisions, guide junior engineers, and lead future system modernizations while collaborating closely with project managers, product managers, and business stakeholders.
Responsibilities
- Technical Leadership & Architecture: Drive technical decisions, guide architecture design, review code, and provide hands-on technical mentorship to engineers across multinational development teams.
- System Operations & Modernization: Oversee the operation and maintenance of high-availability, high-scale platforms while leading plans for system replacement and version upgrades.
- Execution & Delivery: Partner with project managers to drive development deliverables that align with quality standards, deadlines, budgets, and scope.
Mandatory Qualifications
- 5+ years of software development experience covering end-to-end service lifecycles (design, release, and operations).
- 3+ years managing/maintaining the same system, with proven experience leading teams through system upgrades or major architectural renewals.
- Strong schedule management, task planning, and cross-team coordination capabilities.
- In-depth technical knowledge of RDBMS, Redis, Kafka, Kubernetes, RESTful APIs, and high-availability architecture design.
- Practical experience designing, developing, and optimizing scalable web applications with Java and Spring Boot.
Desired Qualifications
- Hands-on experience with cloud platforms (Azure), Docker, CI/CD pipelines, and performance testing.
- Demonstrated experience acting as a Tech Lead or leading development teams.
Work Environment
- Team Structure: Collaborative environment with a flat, cross-cultural team structure composed of internal engineers and external vendor partners.
- Tech Stack: Java, JavaScript, Python, Go, MySQL, Redis, MongoDB, Git, Linux, Azure, Kubernetes, and RESTful APIs under Agile/Waterfall methodologies.
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