Fujisawa, Japan · Backend & AI
Good software starts with good people.
Topis Mos is a team of senior Japanese software engineers in Fujisawa. We work with US startups and agencies as their development partner, with our focus on backend systems and AI.
Mos
- Based in Fujisawa, Japan
- Experience 7+ years, senior engineers
- Main focus Backend and AI
Who we are
Friends and colleagues, building software from Fujisawa.
We’re Topis Mos, a team of Japanese software engineers based in Fujisawa, Japan. We’re friends as well as colleagues, and we hold bachelor’s and master’s degrees in computer science from the Shonan Institute of Technology.
Each of us is a senior engineer with more than seven years of experience. Our core is backend engineering and AI, and we work across the whole stack when a project needs it.
We also do AI training work: creating, reviewing and evaluating the data used to train and test large language models. That work keeps us close to how models actually behave.
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Craft
Our foundation
Senior engineers with more than seven years of experience across frontend, backend, AI and blockchain.
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People
Our strength
A close team of friends and colleagues with computer science degrees from the Shonan Institute of Technology.
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Trust
Our promise
Clear communication and honest estimates, so you always know where your project stands.
Our way
Technology matters.
The people behind it matter more.
Four ideas from Japanese working culture shape how we work.
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ものづくり
Monozukuri Craftsmanship
Pride in making things well, including the parts nobody sees: clear data models, tests, and code the next engineer can read.
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改善
Kaizen Continuous improvement
Small, steady improvements over big rewrites. Every release should leave the product a little better than the last.
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報連相
Hō-ren-sō Report, contact, consult
Regular updates, early warnings and shared decisions, so nothing is a surprise across time zones.
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おもてなし
Omotenashi Anticipating needs
Thinking ahead for the people we work with, and for the people who will use what we build.
What we do
Backend and AI at the core. The full stack when you need it.
We join your team as senior engineers, or take a product from first idea to launch.
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Backend engineering
Main focusAPIs, data models, integrations and the services your product runs on.
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AI and LLM applications
Main focusProducts and features built on large language models, from first prototype to production.
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Full-stack products
Frontend and backend together, so one team owns the whole product.
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Blockchain development
Blockchain-based applications and the backend services around them.
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AI training and evaluation
Creating, reviewing and evaluating the training and evaluation data behind large language models.
How we work
A clear path from first call to launch.
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Discover
We learn your goals, users and constraints, and agree on what success looks like.
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Design
We plan the architecture and scope the first release with you.
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Build
We build in short cycles and share progress at every step.
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Launch
We ship, watch how it performs, and keep improving it.
Across the Pacific
Two sides of the Pacific. One shared project.
We’re in Fujisawa, Japan, working with startups and agencies across the United States.
- Fujisawa 藤沢 Japan Standard Time (UTC+9)
- US Pacific Seattle, San Francisco, Los Angeles
- US Central Chicago, Austin
- US Eastern New York, Boston, Miami
Contact
Let’s build something good together.
Tell us about your product, your team and where you need help. We’d be glad to talk it through.
- Book a call
- 30 minutes on Calendly (opens in a new tab)
- Pick a time that suits you; it shows in your time zone.
- Location
- Fujisawa, Kanagawa, Japan
- 神奈川県藤沢市