Senior Blockchain Backend Engineer

**APEING Labs is building the next generation of on-chain trading and liquidity market intelligence infrastructure across perps, prediction markets, and high-velocity crypto assets. Our goal is not to ship features — it’s to build infrastructure and intelligence layers that users and partners depend on.**

**This role is for engineers who think from first principles, care deeply about performance and correctness, and want to work on systems where latency, data integrity, and scale actually matter.**

**The Role**

**We’re looking for a Senior Blockchain Backend Engineer with deep experience in Web3 infrastructure, DeFi systems, and backend architecture. You’ll be responsible for designing and building mission-critical backend services that power real-time trading, data aggregation, and execution across multiple on-chain environments.**

**You will work closely with founders and senior engineers to make architectural decisions that define the platform long-term.**

**What You’ll Work On**

- **High-performance backend services for on-chain trading**
- **Blockchain data ingestion, indexing, and aggregation pipelines**
- **RPC integrations and abstraction layers (Solana / EVM)**
- **Execution, routing, and state-sync systems**
- **Real-time market data, analytics, and user state**
- **Secure key management, secrets, and infra-level safeguards**
- **APIs and services that must be fast, reliable, and correct**

**Key Responsibilities**

- **Design and implement scalable backend architectures for Web3 products**
- **Build and maintain blockchain-native services with a focus on performance**
- **Own data integrity, correctness, and fault tolerance**
- **Collaborate with frontend, product, and infra teams to ship production systems**
- **Make thoughtful tradeoffs between speed, safety, and scalability**
- **Write clean, well-documented, and maintainable code**
- **Identify bottlenecks, failure modes, and long-term risks before they happen**

**What We’re Looking For**

**Required:**

- **6+ years of backend engineering experience**
- **Strong experience with blockchain / Web3 / DeFi systems**
- **Deep understanding of backend fundamentals (APIs, databases, concurrency, caching)**
- **Experience with high-throughput, low-latency systems**
- **Proficiency in one or more backend languages (Go, Rust, TypeScript, Python, etc.)**
- **Experience working with cloud infrastructure and CI/CD pipelines**
- **Strong systems thinking and problem-solving skills**

**Strong Plus:**

- **Experience with Solana and/or EVM chains**
- **Experience building indexers, data pipelines, or RPC services**
- **Familiarity with trading systems or financial infrastructure**
- **Security-first mindset (keys, secrets, access control)**
- **Experience in early-stage or high-ownership environments**

**Who This Role Is For**

- **Engineers who own systems, not tickets**
- **Builders who care about long-term architecture, not hacks**
- **People who want real responsibility and influence**
- **Those comfortable working with ambiguity and high standards**

**This is not a junior role, and not a place to coast.**

**Why Join**

- **Build foundational infrastructure in a fast-growing Web3 space**
- **High ownership and direct influence on technical direction**
- **Work with an ambitious team focused on execution and quality**
- **Competitive compensation based on experience and impact**
- **Opportunity to help shape a category-defining platform**

**To apply:**

**Please include:**

- **Your background in blockchain / backend systems**
- **Links to GitHub or relevant technical work (if available)**
- **A brief note on what kind of systems you enjoy building**