Senior Backend Engineer (TypeScript) - Digital Asset Super App "Startale App"
Startale Group is an onchain-finance company building products that bring digital assets, stablecoins, and blockchain applications to users and institutions. Its offerings include Startale App, a digital-asset superapp, and Startale USD (USDSC), a U.S. dollar stablecoin.
About Startale Group
Startale Group develops an onchain-finance ecosystem spanning consumer and institutional use cases. Its Startale App enables users to hold, swap, earn, and spend digital assets, access onchain mini apps, and collect rewards. The company also issues Startale USD (USDSC), a U.S. dollar stablecoin built on M0 and backed by short-term U.S. Treasuries, and provides developer resources for building within its ecosystem. It supports partners building mini apps and works with institutions on tokenized capital-markets and stablecoin initiatives.
Skills
About the Role
You will own the backend architecture and implementation behind Startale App, a digital asset super app used by 170,000 monthly users and growing toward millions. You will design, build, and operate scalable production APIs and backend services, high-performance distributed systems handling large-scale traffic, data pipelines, background workers, and event-driven architectures. You will build blockchain integration and indexing systems that ingest and process on-chain data, design efficient database schemas, optimize complex queries, and ensure long-term storage scalability. You will diagnose and resolve complex production incidents, performance bottlenecks, and scaling challenges while setting up observability, monitoring, and alerting. You will lead architectural decision-making, including the migration from a monolithic setup to an architecture supporting many features, and you will work daily with both large-scale Web2 systems and Web3 integrations such as wallets, indexers, and DeFi protocols.
Requirements
- 3+ years of professional work experience and advanced English proficiency (English is the official company language); at least 3 of the following requirements
- Experience building and operating backend systems supporting large-scale users and high traffic in production
- Experience technically leading the complexity of bundling many features into one app for a large-scale B2C product
- Knowledge of TypeScript and modern backend frameworks (NestJS, Fastify, Express, etc.)
- Solid understanding of API design, service-oriented architecture, and distributed systems design; ability to ship complex systems from design to production with minimal supervision
- Deep hands-on experience with PostgreSQL (schema design, indexing, query optimization, production database operations)
- Experience building systems that process large volumes of structured and event-driven data
- Experience setting up observability and monitoring, and operating production incident response and scaling
- Willingness and curiosity to quickly learn and absorb unknown domains (blockchain experience not required)
Responsibilities
- Own the backend architecture and implementation centered on Startale App
- Design, build, and operate scalable production APIs and backend services for customer-facing applications
- Build and operate high-performance distributed systems that handle large-scale users and high traffic
- Build and maintain data pipelines, background workers, asynchronous processing, and event-driven architectures
- Build blockchain integration and indexing systems that ingest and process on-chain data for internal services and user-facing apps
- Design efficient schemas, optimize complex queries, and ensure long-term scalability of data storage
- Diagnose and resolve complex production incidents, performance bottlenecks, and scaling challenges
- Set up observability, monitoring, and alerting
Benefits
- Stock option plan
- Hybrid work in Japan or Singapore with conditional fully remote option
- Annual company-wide workation
- Flexible discretionary vacation system