UltaTechs

Generative AI and SaaS, built in Japan.

生成AIとSaaSを、日本から。

Founded byHiroshi Kaji梶 弘

A small senior team building production AI features and full SaaS products end-to-end — from prototype to production, by the same hands.

Japan·Founded October 2024·5–6 Engineers

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会社概要

About UltaTechs

UltaTechs logo
ULTATECHS

UltaTechs is a Japan-based engineering studio founded in October 2024. A small team of 5–6 engineers builds end-to-end — from generative AI features to full SaaS products — for clients who want to ship real systems, not prototypes.

Founded byHiroshi Kaji·Founder & Team Lead
2024.10
Founded
5–6
Engineers
JP
Based in Japan
2
Core Services

技術力

Skills & Technologies

OpenAIAnthropicLangChainLlamaIndexVercel AI SDKMCPHugging FaceRAGFine-tuning
TypeScriptPythonGoRustSQL
ReactNext.jsTailwind CSSshadcn/uiTanStack QueryFramer MotionStorybookReact Native
Node.jsFastAPIHonotRPCgRPCGraphQLWebSocket
PostgreSQLpgvectorRedisSupabasePrismaDrizzleClickHouseBigQuery
AWSGCPCloudflareVercelDockerKubernetesTerraformGitHub Actions
VitestPlaywrightJestSentryDatadogGrafana

作品集

Selected Work

Anonymized case studies from client engagements. Specifics are under NDA — reach out for references.

Suke

GenAI

AI Assistant Platform

RAG-powered internal assistant for a Japanese enterprise — answers staff questions over thousands of internal documents with citation links and role-based access controls.

PythonAnthropicLangChainpgvectorNext.jsFastAPI
Private engagement

Doku

GenAI

Document Intelligence

Automated document processing pipeline for back-office workflows — extracts structured data from forms, invoices, and contracts with LLM-based validation.

PythonOpenAIFastAPIPostgreSQLAWS
Private engagement

Kotae

GenAI

Customer Support Copilot

AI agent for customer support triage — drafts responses, classifies tickets, and surfaces relevant past cases so human agents can resolve faster.

TypeScriptAnthropicVercel AI SDKNext.jsSupabase
Private engagement

En

SaaS

Recruiting Platform

End-to-end SaaS for a recruiting agency — candidate tracking, AI-powered matching, and dual portals for recruiters and candidates with secure document handling.

Next.jsTypeScriptPostgreSQLPrismaStripeTailwind CSS
Private engagement

Mise

SaaS

Hospitality Operations

Reservation and operations platform for a hospitality client — real-time booking, staff scheduling, multi-location dashboard, and POS integration.

Next.jsTypeScriptPostgreSQLStripeVercelTailwind CSS
Private engagement

Saku

GenAI

Knowledge Search

Semantic search platform over a client's internal data — multi-source connectors, hybrid retrieval, and Japanese-language tuning for high recall on domain content.

PythonpgvectorHugging FaceNext.jsElasticsearch
Private engagement

Oto

GenAI

Call Intelligence

Real-time call analytics for a sales team — speaker diarization, sentiment scoring, and automatic CRM notes generated from each conversation.

WhisperOpenAIPythonFastAPIPostgreSQL
Private engagement

Juku

SaaS

EdTech Platform

Tutoring management SaaS for a Japanese cram school chain — class scheduling, homework tracking, parent progress reports, and integrated payment handling.

Next.jsTypeScriptPostgreSQLStripeResendTailwind CSS
Private engagement

Ichi

SaaS

B2B Marketplace

Wholesale B2B marketplace for a niche industry — listing management, multi-party invoicing, escrow payments via Stripe Connect, and seller analytics.

Next.jsTypeScriptPostgreSQLStripe ConnectTailwind CSS
Private engagement

哲学

Philosophy

AIは道具、人が主役

AI is the tool — people are the protagonist.

UltaTechs builds AI products that amplify how people work, not replace them. Every system we ship is judged by whether it makes the person using it more capable — with reliability, transparency, and the discipline to keep improving as a team.

お問い合わせ

Contact

UltaTechs

Work with us

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