Are you an experienced engineer who thrives on solving complex system architecture challenges? Fast-growing international tech company in Tokyo is looking for a Senior Software Engineer to lead the transition from a core monolith to a scalable Service-Oriented Architecture. In this role, you will act as a technical lead shaping architectural strategy, driving domain boundaries, and selecting the modern tech stack to support rapid Asian market expansion. Key Responsibilities Tech Stack Selection: Evaluate and choose modern, statically-typed languages for future services, prioritizing type safety, concurrency, and developer experience. Domain & Technical Leadership: Partner with product managers to refine technical specifications, define domain boundaries, mentor engineers, and set engineering standards. High-Reliability Engineering: Design scalable database schemas and distributed workflows that ensure transaction integrity, payment consistency, and high availability. DevOps & Observability Culture: Drive a "you build it, you run it" culture by implementing zero-downtime deployment strategies, CI/CD pipelines, and robust monitoring. Requirements Statically-Typed Languages: Demonstrated experience with languages such as Go, Kotlin, Scala, Rust, or C#, including async/concurrency paradigms. SOA & Monolith Refactoring: Proven background designing SOA/microservices while maintaining and refactoring monolithic codebases. Database Scalability: Hands-on experience with scalable storage and database solutions (e.g., AWS Aurora, Cassandra). CI/CD & Observability: Practical experience with CI/CD tools (GitHub Actions, CircleCI) and monitoring/logging stacks (Datadog, Grafana, Prometheus). Communication & Ownership: Fluent written and verbal communication skills in English with an entrepreneurial, problem-solving mindset. Nice-to-Have Experience with Ruby and Ruby on Rails. Japanese language proficiency. Benefits Commuting allowance: paid in accordance with company regulations Full social insurance (employment, workers' compensation, health, and pension) Saturdays, Sundays and national holidays Annual paid vacation: 10 days at the time of employment Year-end and New Year vacations: 6 days from December 29 to January 3
Altera Consulting Co., Ltd. is a Tokyo-based consulting firm specialized in Digital Transformation (DX) and Artificial Intelligence (AI). We help organizations build and strengthen their technology, data, and AI capabilities to unlock growth, efficiency, and long-term competitiveness.
Our team brings together expertise in business consulting, engineering, product, design, data, AI, and project management. With this diverse skill set, we partner with clients to deliver end-to-end transformation solutions, from strategy to execution.
By applying agile and lean principles and integrating AI into real-world workflows, we’ve helped organizations of all sizes (from startups to global enterprises) adapt, innovate, and thrive.
The pace of change is only accelerating. Industries everywhere are being disrupted, and success depends on how quickly businesses can adopt new technologies and modern ways of working. At Altera, we make transformation practical, scalable, and tailored to your needs, so you can focus on creating value while staying future-ready.
🌍 OUR SERVICES:
1. Altera Consulting – DX & AI Consulting
We design and implement digital and AI solutions across systems, processes, and people to drive measurable business outcomes.
2. Altera Connect – Consultant on Demand
Flexible, on-demand access to skilled experts who can fill capability gaps and accelerate projects without long hiring cycles.
3. Altera Recruiting – Recruitment Services
Helping companies in Japan secure top talent, from digital project managers to AI engineers, leveraging our deep industry network and trusted relationships.
At Altera Consulting, we don’t just advise, we partner with you to build stronger, smarter, and more resilient organizations for the digital & AI era.
