Top Tech Jobs & Startup Jobs in Los Angeles, CA

Design, develop, benchmark, and maintain high-performance Rust infrastructure extending the EVM with security-focused precompiles and parallel processing. Own complex features through delivery, collaborate across teams, review code, fix bugs, and contribute to open-source crypto infrastructure. Apply expertise in Ethereum execution systems, low-level programming, profiling, memory management, testing, databases, concurrency, and performance optimization.

Build and maintain secure, scalable APIs, backend services, platform infrastructure, and cloud systems for a Web3 wallet infrastructure provider. Responsibilities include designing resilient distributed systems, improving performance and availability, implementing monitoring and security controls, managing releases, writing comprehensive tests, resolving complex issues, documenting solutions, supporting customers, and collaborating across technical and business teams.

Lead the design, development, and launch of secure iOS and Android wallet applications. Own mobile features end to end, refine React Native and cross-platform SDKs, improve performance and architecture, and deliver fintech-grade UX and authentication. Collaborate with product and design, document technical work, review code, and mentor teammates while applying expertise in WebAuthn, passkeys, fintech or blockchain applications, and secure mobile development.

Owns the complete HR and People Operations function for an international, remote-first scale-up. Responsibilities include recruiting, onboarding, performance management, payroll and benefits, employee relations, compliance, offboarding, engagement, retention, compensation, career development, HR systems, and company culture. The role partners with leadership and legal, organizes retreats and internal events, and builds scalable HR processes as the company grows.

Lead development of high-performance Solana validator infrastructure using Rust, with exposure to C-based Firedancer. Refactor and design modular distributed systems, interpret protocol specifications, maintain performant code, automate security testing and benchmarking, participate in architecture discussions and code reviews, and mentor engineers. The role requires deep Solana ecosystem expertise, validator experience with Agave and Firedancer, scalable distributed-systems development, and blockchain security knowledge.

Designs and owns complex Rust infrastructure features for a blockchain security framework, including EVM extensions, security-focused precompiles, parallel processing, performance optimization, benchmarking, testing, debugging, and open-source contributions. Collaborates across teams, supports bug fixes, reviews code, and contributes to technical roadmap decisions. The role requires deep Rust and Ethereum expertise, low-level systems programming experience, and strong knowledge of performance optimization, memory management, and concurrent systems.

Design, build, and operate secure core infrastructure for MPC signers, HSMs, TEEs, distributed databases, and blockchain-connected services. Develop low-level Rust middleware, secure APIs, and networking; optimize performance, reliability, latency, and resource usage; integrate cryptographic protocols into production; and collaborate with infrastructure, security, research, product, clients, and partners.

Own the architecture and operation of backend infrastructure supporting high-volume crypto trading. Build real-time pipelines for order books, trades, and market events; design GraphQL and WebSocket APIs; manage PostgreSQL, Redis, and ClickHouse data systems; optimize latency, caching, schemas, and queries; monitor reliability; debug performance issues; and collaborate with frontend and mobile teams.

Lead the design, development, testing, optimization, monitoring, and maintenance of scalable backend systems and APIs. Build production-grade solutions for blockchain and DeFi use cases, conduct code reviews, document technical processes, troubleshoot complex problems, and mentor junior developers. Collaborate with frontend, product, and design teams while maintaining high availability, security, performance, and code quality across the Node.js and TypeScript technology stack.

Architect and build the Solver framework powering NEAR Intents, including solver competition, quote aggregation, execution workflows, and cross-chain infrastructure. Lead technical design, code reviews, architectural decisions, and globally distributed collaboration while ensuring low-latency, high-throughput performance. Shape solver economics and cryptoeconomic incentives, remain hands-on with coding and prototyping, and address complex distributed systems and blockchain challenges.