Staff Backend Engineer: Build Trusted Onchain Infrastructure

aavelabs; Madrid; On-site; EUR 90,000 - 130,000; Full time

Job summary

Aave Labs is hiring a Staff Backend Engineer to build the backend infrastructure behind Aave App, a consumer savings app that makes onchain financial products simple, secure, and intuitive.

The role focuses on the systems between blockchain protocols and consumer experiences, including accounts, wallet services, transaction orchestration, indexing, and APIs for mobile and web clients. You'll own a broad technical area with high ownership and turn ambiguous goals into reliable production systems.

Qualifications

• 6+ years of backend engineering experience with ownership of complex production systems.
• Strong backend programming skills; Rust is highly desirable, with Go, C++, or Java also acceptable.
• Experience building distributed, event-driven, or data-intensive systems with reliability and performance requirements.
• Strong knowledge of API/GraphQL design, PostgreSQL or another relational DB, caching, queues, and observability.
• Experience with blockchain systems, particularly transaction signing, key-management flows, wallet infrastructure, and onchain lifecycles.
• Strong judgement around threat modelling, sensitive data, and operational risks of systems handling financial value.

Responsibilities

• Design, build, and operate backend services for Aave App across onboarding, funding, savings, withdrawals, portfolio data, and customer communications.
• Build transaction-orchestration and indexing services that safely prepare, submit, monitor, and reconcile onchain activity across its full lifecycle.
• Integrate with smart contracts, RPC providers, account infrastructure, payment partners, and other external services, designing for degraded dependencies and partial failure.
• Lead technical reviews for high-value systems and improve testing, observability, alerting, incident response, and deployment practices across the backend codebase.
• Work closely with mobile, web, product, design, protocol, security, data, and operations teams to deliver coherent consumer experiences.
• Raise the engineering standard through hands-on delivery, pragmatic architecture, clear documentation, and review that helps other engineers grow.

Skills

Backend engineering

Distributed systems

API/GraphQL design

Security and risk management

Observability

Tools

Rust

Go

C++

Java

PostgreSQL

Caching

Message queues

GraphQL

Kafka

ClickHouse

RPC providers

Job description

Aave Labs is hiring a Staff Backend Engineer to build the backend infrastructure behind Aave App, a consumer savings app that makes onchain financial products simple, secure, and intuitive.

The role focuses on the systems between blockchain protocols and consumer experiences, including accounts, wallet services, transaction orchestration, indexing, and APIs for mobile and web clients. You'll own a broad technical area with high ownership and turn ambiguous goals into reliable production systems.