Senior Backend Engineer, Blockchain Data Platform

Hood L2; San Francisco (CA); Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

Private Health Insurance

Gym Reimbursement

Commuter Benefits

Flexible Time Off

In-Office Group Meals

Learning & Development Stipend

Company Sponsored Conferences & Events

Books & Audiobook subscription

Job summary

Alchemy is hiring a backend-focused engineer to build and operate data systems that turn blockchain activity into developer-friendly data APIs. You will own ingestion, indexing, storage, and API-serving, ensuring data is correct, fresh, and fast to query.

Collaborate with Product and customer-facing teams to ship reliable, scalable data services. You will work on fixing reorganizations, retries, and historical backfills, improving performance and cost, with strong emphasis on observability and

Qualifications

• Independent design, shipping and operation of production backend or distributed data systems.
• Strong programming skills in a production backend language, plus experience with databases, indexing, and query performance.
• Experience reasoning about consistency, partitioning, asynchronous processing, and failure recovery.
• Evidence that you can diagnose a production problem and improve the system beyond the immediate fix.
• Sound API design judgment, including compatibility, pagination, error handling, and data contracts.
• Clear communication and the ability to turn an ambiguous customer problem into a scoped engineering project.

Responsibilities

• Build and operate blockchain ingestion, indexing, storage, and API-serving systems.
• Handle reorganizations, retries, duplicate events, and historical backfills without silently losing or corrupting data.
• Improve query performance and data freshness. Make those properties observable to the team and understandable to customers.
• Extend API capabilities and chain coverage, with tests for differences in chain behavior and data semantics.
• Develop streaming and event-delivery capabilities with explicit guarantees for ordering, replay, and failure recovery.
• Reduce the cost of storing, processing, and serving data through measured changes to architecture and query execution.
• Participate in production support and incident response for the systems you own. Maintain monitoring, runbooks, safe rollouts, and fixes that prevent recurrence.

Skills

Backend development

Databases

APIs design

System reliability

Distributed data systems

Communication

Tools

ClickHouse

Kafka

Job description

Alchemy is hiring a backend-focused engineer to build and operate data systems that turn blockchain activity into developer-friendly data APIs. You will own ingestion, indexing, storage, and API-serving, ensuring data is correct, fresh, and fast to query.

Collaborate with Product and customer-facing teams to ship reliable, scalable data services. You will work on fixing reorganizations, retries, and historical backfills, improving performance and cost, with strong emphasis on observability and