Senior Software Engineer (Data Services)

Alchemy; United States; On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Health insurance

HSA

Flexible time off

Group meals

401k plan

Company retreats

Conferences and events

Gym membership

Commuting benefits

Relocation bonus

Paid parental leave

Home office stipend

Job summary

Alchemy is seeking an experienced backend/data systems engineer to build and operate ingestion, indexing, storage, and API-serving systems for Data Services. You will own end-to-end backend components, improve data quality and freshness, and collaborate with product teams to deliver reliable, scalable data APIs for developers.

You will focus on reducing latency and cost, implementing explicit guarantees for ordering and replay, and driving production-readiness through testing and runbooks.

Qualifications

• Proven track record designing and operating production backend or distributed data systems.
• Strong experience with a production backend language and data stores.
• Ability to turn ambiguous customer problems into scoped engineering projects.
• Sound API design judgment, including pagination and data contracts.

Responsibilities

• Own backend projects from ingestion through serving, ensuring data correctness, freshness and fast queries.
• Collaborate with product and customer teams to translate needs into reliable software improvements.
• Build and operate ingestion, indexing, storage, and API-serving systems.
• Handle retries, reorganizations, and backfills without data loss or corruption.
• Improve query performance and data freshness, with observability for the team and customers.
• Extend API capabilities and chain coverage with robust tests.
• Develop streaming and event delivery with ordering, replay, and failure guarantees.
• Reduce storage/compute costs via architecture improvements and query optimization.
• Participate in production support and incident response with playbooks and safe rollouts.

Skills

Backend programming

Databases

Indexing

Query optimization

Streaming systems

Job description

• Build the systems that turn blockchain activity into data developers can use. Alchemy’s Data Services work includes token, portfolio, and transfer APIs, with streaming in the updated roadmap
• You will own backend projects from ingestion through serving, making data correct, fresh, and fast to query. You will work with Product and customer-facing teams to understand what developers need, then ship improvements and measure their effect on reliability, performance, and cost
• 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
• Within three months:
• You have shipped a customer-facing improvement and can show its effect on data quality, freshness, latency, or cost
• You own a production component, have tested its recovery behavior, and have proposed the next improvement using operational evidence and developer feedback

Benefits

• Health, dental and vision insurance
• HSA
• Flexible time off
• Group meals
• 401k plan
• Company retreats
• Conferences and events
• Gym membership
• Commuting benefits
• Relocation bonus
• Paid parental leave
• Home office stipend

• Evidence that you can diagnose a production problem and improve the system beyond the immediate fixExperience reasoning about consistency, partitioning, asynchronous processing, and failure recovery
• Blockchain experience is helpful, but not required.
• You should be interested in learning how chain behavior affects data correctness
• A track record of independently designing, shipping, and operating production backend or distributed data systems
• Strong programming skills in a production backend language, plus experience with databases, indexing, and query performance
• Clear communication and the ability to turn an ambiguous customer problem into a scoped engineering project
• Sound API design judgment, including compatibility, pagination, error handling, and data contracts
• Developer-facing data APIs, real-time delivery, or large historical datasets
• ClickHouse or other analytical databases; Kafka or similar streaming systems
• Blockchain indexers, EVM logs and traces, finality, or non-EVM data models
• Storage migrations and performance or cost optimization under production traffic