Backend Engineer Indexer

Web3 Foundation; Singapore; On-site; SGD 80,000 - 120,000; Full time

Job summary

A leading blockchain technology company in Singapore is seeking a Senior TypeScript Engineer to design, build, and operate backend systems that power its Web3 products. The ideal candidate will have strong expertise in TypeScript, PostgreSQL, and experience with blockchain data indexing. This role offers competitive compensation and opportunities to influence the Web3 ecosystem.

Benefits

Competitive compensation

Ownership opportunities

Collaborative work environment

Qualifications

• Strong proficiency in TypeScript and Node.js backend frameworks.
• Deep knowledge of PostgreSQL and database management.
• Experience building and operating indexers in production environments.
• Solid understanding of observability metrics and troubleshooting.

Responsibilities

• Design, build, and operate production-grade blockchain indexers.
• Develop and maintain backend APIs and services for structured blockchain data.
• Optimize ingestion throughput, data accuracy, and scalability.

Skills

TypeScript

Node.js backend frameworks

PostgreSQL

Blockchain data indexing

System observability

Tools

Docker

The Graph

NATS

Job description

Position Overview

You will be a Senior TypeScript Engineer responsible for designing, building, and operating backend systems and indexers that power Startale’s suite of Web3 products - including our wallet and other on-chain applications.

Your primary focus will be on developing production-grade indexers that ingest, transform, and serve blockchain data for use across Startale’s platforms. You’ll design systems that are scalable, reliable, and maintainable under real-world conditions - ensuring our products have access to accurate, low-latency on-chain data.

This is a senior, hands-on engineering role requiring strong backend fundamentals, deep familiarity with blockchain data models, and experience operating complex systems in production. You’ll work closely with product, protocol, and infrastructure teams to deliver data services that underpin seamless Web3 experiences.

Key Responsibilities

• Design, build, and operate production-grade blockchain indexers using TypeScript and modern frameworks.
• Develop and maintain backend APIs and services that provide structured blockchain data to Startale’s products.
• Model and manage relational data with PostgreSQL, ensuring efficient schema design and query performance.
• Use and extend indexing frameworks (e.g., The Graph, Subsquid, or custom-built solutions) to support diverse on-chain data needs.
• Ingest and process blockchain events, transactions, and states into consistent, queryable datasets.
• Build and maintain monitoring, alerting, and observability tools for indexer and service reliability.
• Collaborate with cross-functional teams to design data pipelines and integration layers for on-chain applications.
• Continuously optimise ingestion throughput, data accuracy, and scalability under production workloads.

Requirements

TypeScript Backend Development

• Strong proficiency in TypeScript and Node.js backend frameworks (e.g., NestJS, Fastify, Express).
• Proven experience developing and maintaining production backend systems.

Relational Database Expertise

• Deep knowledge of PostgreSQL - schema design, indexing strategies, and query optimisation.
• Experience managing database consistency and schema migrations in production.

On-Chain Data Indexing (Production Experience Required)

• Demonstrated experience building and operating indexers in production environments.
• Strong understanding of blockchain data indexing patterns (event sourcing, block scanning, incremental sync).
• Ability to rapidly build, deploy, and scale indexers using frameworks like The Graph, Subsquid, or equivalent.
• Experience handling indexer reliability challenges - reorgs, resyncs, scalability, and performance tuning.

Operational Excellence

• Solid understanding of observability (metrics, logs, traces) and system health monitoring.
• Comfortable diagnosing and resolving production issues in distributed systems.

Big Bonus

• Experience with real-time data streaming technologies (Kafka, NATS, or similar).
• Familiarity with ETL pipelines and incremental sync architectures.
• Experience containerising and deploying services using Docker.
• Knowledge of Web3 infrastructure or blockchain node APIs.
• Contributions to open-source indexing or blockchain tooling projects.

Why Join Us

• Build core infrastructure powering Startale’s Web3 wallet and ecosystem applications.
• Work on systems that bridge cutting-edge blockchain data with real user experiences.
• Collaborate with world-class engineers in a technically ambitious, high-impact environment.
• Competitive compensation, ownership opportunities and a direct role in shaping the Web3 data layer.