Principal Software Engineer​/Senior Software Engineer

Senior Software Engineer - GA technologies 仕事概要

【About GA technologies】 At GA technologies (GA), we operate at the intersection of Real Estate and Technology (Prop Tech). Our driving mission is: "Spark excitement and inspiration by fusing technology with innovation to propel the world forward."

【What you’ll do】 We are a leading Prop Tech company innovating traditional processes and enhancing customer experiences within this massive market (over 10% of Japan’s GDP). We are in a pivotal phase, akin to “Online Real Estate 1.0,” defining the future of Prop Tech in Japan and building market-defining products.

• Lead the design and development of systems to solve complex challenges unique to the Japanese real estate industry, such as information asymmetry, analog workflows, and cumbersome contract processes, using technology.
• Develop and enhance algorithms and scalable system infrastructure to achieve optimal real‑time matching of buyers and sellers, leveraging customer and property data.
• Design and build scalable, highly available systems using microservices architecture, cloud‑native technologies (e.g., containers, serverless), etc., to accommodate rapid business expansion and increasing data volumes.
• Collaborate closely with Product Managers, Designers, and business stakeholders to translate business requirements into robust technical solutions, proactively driving the entire process from requirements definition through design, implementation, testing, and release.
• Contribute to operational excellence by ensuring the stable operation of existing systems, monitoring and tuning performance, systematically addressing technical debt, and improving development efficiency through CI/CD pipeline enhancements.
• Lead technical decision‑making for technology selection and architectural design within your domain. Take ownership of improving the team’s technical capabilities and ensuring output quality through rigorous code and design reviews.
• Actively provide technical guidance and mentorship to junior engineers and other team members, fostering the overall growth of the team.

You can check our tech stack at the following URL: (Use the "Apply for this Job" box below).#

Learn More About Our Engineering Team: -9794f

• Experience leading a team of multiple engineers, making key technical decisions, and driving development forward
• Track record of launching new services or products from scratch (0→1), collaborating closely with PMs and designers to deliver customer value
• Long‑term ownership of a single product (2–3+ years), continuously enhancing its value based on user feedback and usage data
• Leadership in making mid‑to‑long‑term technical decisions, including technology selection and architectural design
• Proactive exploration of new technologies, tools, and services, conducting hands‑on validations (PoC), and introducing them into production systems

• Resonates with GA technologies Group’s corporate vision and values.
• Highly motivated learner who continuously acquires new skills and knowledge.
• Comfortable working in a fast‑paced environment and enjoys dynamic changes.
• Able to remain focused on problem‑solving and flexible enough to experiment with various approaches rather than being fixated on specific methods.
• Demonstrates a deep understanding of business domains and genuinely values feedback from users and customers.

8,000,000~ yen per year. Monthly salary: 667,000~ yen (includes fixed overtime allowance for 30 hours: 146,400~ yen ).
* Additional compensation provided for overtime exceeding 30 hours.
* Salary will be determined based on skills and experience.

Remote Work Policy:
In principle, employees are expected to work in the office three days a week and work remotely two days a week. Fully remote work is not permitted; however, if you have personal circumstances that require adjustments to your office attendance frequency, you can consult with us as needed.

Location:

Sumitomo Fudosan Roppongi Grand Tower 40F, Roppongi, Minato‑ku, Tokyo. Nearest Stations:

- Direct access from…