Senior Blockchain Engineer, Moonshot

Alchemy; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

Alchemy is hiring for a backend-focused engineer to take ambiguous blockchain infrastructure ideas from concept to working systems. You will define hypotheses, design experiments, and prototype across blockchain clients, RPC, indexing, and transaction layers.

Read specifications, run benchmarks, and assess security, costs, and operational impact while guiding production rollout and post-launch fixes. You will read protocol specs and code, build reproducible benchmarks, and communicate results

Qualifications

• Experience taking ambiguous engineering problems from idea to working prototype.
• Hands-on knowledge of at least one blockchain and its lifecycle.
• Strong software engineering skills for backend or distributed systems.
• Ability to read unfamiliar code and form testable hypotheses.
• Experience designing reproducible performance benchmarks and profiling.
• Evidence of careful reasoning about correctness and security.
• Product judgment: explain who needs a

Responsibilities

• Identify developer or infrastructure problems that could justify a new blockchain capability or product, working with engineering, Product, and customer-facing teams.
• Define each experiment’s hypothesis, success criteria, constraints, and time limit before building.
• Prototype across the layers the problem requires: blockchain clients, RPC, indexing, transaction infrastructure, backend services, or smart contracts.
• Read protocol specifications and implementation code, then test assumptions with reproducible benchmarks and failure cases.
• Evaluate developer or operational value alongside technical feasibility, security, operating cost, and the effort required to support the system.
• Take validated ideas through production design, testing, rollout, observability, and operational documentation with partner teams.
• Write concise recommendations to continue, change direction, or stop, supported by the experiment’s results.
• Participate in production support and incident response for the systems you ship. Own monitoring, runbooks, and fixes after launch.

Skills

Blockchain knowledge

Backend development

Distributed systems

Code comprehension

Performance benchmarking

Security reasoning

Product judgment

Job description

About

AlchemyAlchemy is the Web3 infrastructure and developer platform that powers millions of users and the world’s most innovative blockchain applications. From enabling $1+ trillion in financial transactions worldwide to scaling L2s and enabling DeFi, Alchemy provides the infrastructure and tools developers need to build reliable, scalable, and accessible experiences.Trusted by companies like JPMorgan, Stripe, Visa, Franklin Templeton, Nike, and backed by a16z, Coatue, Silver Lake, Lightspeed, and Stanford University, Alchemy is building the foundational layer for a decentralized and AI-enabled Web3 ecosystem. For more information, visit alchemy.com.

The Role

Take new blockchain infrastructure and product ideas from an uncertain problem to a working system. You will help choose what to test, build the smallest experiment that answers the important questions, and turn promising results into production software.You should enjoy reading protocol specifications and unfamiliar code, talking to developers, and building enough to find out whether an idea is useful. You are also willing to stop an experiment when the evidence does not support it.

What You Will Do

• Identify developer or infrastructure problems that could justify a new blockchain capability or product, working with engineering, Product, and customer-facing teams.
• Define each experiment’s hypothesis, success criteria, constraints, and time limit before building.
• Prototype across the layers the problem requires: blockchain clients, RPC, indexing, transaction infrastructure, backend services, or smart contracts.
• Read protocol specifications and implementation code, then test assumptions with reproducible benchmarks and failure cases.
• Evaluate developer or operational value alongside technical feasibility, security, operating cost, and the effort required to support the system.
• Take validated ideas through production design, testing, rollout, observability, and operational documentation with partner teams.
• Write concise recommendations to continue, change direction, or stop, supported by the experiment’s results.
• Participate in production support and incident response for the systems you ship. Own monitoring, runbooks, and fixes after launch.

What We Are Looking For

• A track record of taking ambiguous engineering problems through working prototypes and production delivery.
• Deep hands-on knowledge of at least one blockchain: its execution model, transaction lifecycle, state, finality, and failure behavior.
• Strong software engineering skills and experience building backend or distributed systems.
• The ability to read unfamiliar code and specifications, form a testable hypothesis, and design an experiment that can disprove it.
• Experience designing reproducible performance benchmarks and using profiling to distinguish CPU, memory, storage, and network bottlenecks.
• Evidence of careful reasoning about correctness and security, especially where mistakes affect funds or chain state.
• Product judgment: explain who needs a