Design and implement scalable backend services and APIs for cryptocurrency swapping.
Build routing and aggregation logic for swap execution across multiple liquidity sources.
Integrate on-chain and off-chain data sources (RPC nodes, indexers, third-party APIs).
Biti Pro is a company building core backend systems for cryptocurrency swapping and DeFi aggregation. They are a small team focused on high-performance, scalable services.
Design and build core systems for our new product from scratch.
Build low-latency, high-reliability services that interact directly with Solana's transaction and block building pipeline.
Own critical infrastructure: order routing, execution, real-time market data, and position management.
Jito builds the market layer of Solana, providing execution, capital, and incentive infrastructure for the network's onchain economy. They are a small, profitable company with a lean, high-density team that values ownership, fast execution, and technical excellence.
Design, build, and maintain scalable distributed backend systems powering platform and product capabilities.
Own backend services end-to-end, from architecture to monitoring, while collaborating with product and engineering peers.
Build and evolve Web3 platform backend components, including protocol integrations and blockchain network support.
Zerion builds backend systems for Web3 infrastructure, powering API and wallet products trusted by 50+ top crypto brands. They have a fully remote team with strong ownership and high code quality, processing over 3.1B requests and supporting 1.7M+ active funded wallets.
Design highly reliable services capable of handling significant traffic fluctuations.
Monitor backend performance, identify bottlenecks, and implement effective optimizations.
Collaborate with cross-functional teams to solve complex technical challenges.
We are a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries and have a flat, innovative culture that values collaboration and autonomy.
Design and implement new features within the Data Product space, including trust-minimized off-chain computation and aggregation of external data in blockchain environments.
Own end-to-end delivery of data products that power the largest market share of DeFi by total value secured.
Build core products with Smart Contracts using Solidity, Move, and Rust.
Chainlink is the industry-standard oracle platform bringing capital markets onchain and powering the majority of decentralized finance. The company has enabled tens of trillions in transaction value and fosters a collaborative, autonomous engineering culture.
Design and implement high-performance components in Rust, C++, or Go for the DEX engine and protocol runtime.
Build low-latency pipelines for order execution, event propagation, and state updates, optimizing concurrency and memory layout.
Investigate and resolve performance bottlenecks using profiling and benchmarking, driving system design decisions for senior candidates.
Nexus is the engine for verifiable finance, building a blockchain designed to embed the global financial system into one compounding system. Headquartered in San Francisco with a growing presence in Buenos Aires, the cross-continental team is backed by leading investors and works with more than 100 partners.
Own backend solutions end to end, from understanding business problems to production deployment.
Design and evolve services for performance, scale, resilience, and data integrity.
Diagnose production problems, address root causes, and share knowledge across the team.
Trading212 enables everyone to build wealth by creating exceptional trading and investing products. Serving over 6 million clients with more than €38 billion in assets under management, the company values high standards, high velocity, and engineering ownership.
Own backend solutions end to end, from problem definition through production.
Design and evolve services for performance, scale, resilience, and data integrity.
Work closely with product and engineering colleagues to turn complex requirements into simple, durable solutions.
Trading212 enables everyone to build wealth by reinventing trading and investing through exceptional products. They serve over 6 million clients with over €38 billion in assets, fostering a culture of high standards, high velocity, and ownership.
Build and maintain backend services for our LLM gateway, including routing, rate limiting, and observability.
Contribute to sandboxing and isolation infrastructure for safe agent-generated code execution.
Write high-performance backend code in Go, Rust, or async Python, supporting Kubernetes-based platform services.
AZX accelerates positive impact in critical industries through AI transformation. Founded in 2024 and profitable from the start, we work with category leaders in real estate, energy, logistics, and utilities.
Design and improve high-volume transaction broadcasting pipelines and wallet infrastructure for scalability.
Manage transaction lifecycle, including detection, retry, rebroadcast, and recovery of stuck transactions.
Build reliable cross-chain and DeFi integrations handling non-atomic multi-step journeys and swap execution.
MoonPay builds the operating system for value movement, enabling crypto, stablecoins, and tokenized assets. With 30M+ customers and 500+ ecosystem partners, the company maintains a high-standards, high-velocity culture and is regulated across multiple regions.
Design highly scalable, mission-critical market data provider services.
Maintain good software quality and test coverage, and participate in code reviews.
Troubleshoot incidents and reported bugs.
Alpaca is a US-headquartered global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, fixed income, and more. The company is backed by $400 million in funding and has a diverse team of 400+ members across multiple countries.
Build and operate Go backend services for key management and signing at scale.
Design and implement cryptographic recovery and trust models for non-custodial wallets.
Work with external auditors, Kubernetes, and distributed systems in a security-critical environment.
Offchain Labs builds the Arbitrum stack, the leading Ethereum scaling solution. They are a well-funded company with $124 million in backing, a small but high-ownership team, and a culture of security-first engineering and collaborative review.
Design and build proprietary advisory services (Block Trading, Portfolio management, IRA) with high quality and performance.
Write code across frontend, backend, databases, and distributed systems, wearing multiple hats in a small team.
Apply deep knowledge of low-latency systems, concurrency, and object-oriented data modeling for scalable architecture.
Alpaca is a US-headquartered global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, and more. With 400+ globally distributed team members and $400 million in funding, they foster a diverse, curious, and empathetic culture.
Design, build, and operate the distributed systems that deliver feature-flag configuration to LaunchDarkly SDKs.
Own and improve the reliability, latency, and scalability of our streaming and polling infrastructure.
Debug and resolve complex production issues while sharing the team's on-call rotation.
LaunchDarkly builds a feature management platform that enables safe and gradual software releases. The company is growing and fosters a humble, open, collaborative culture.
Implement and manage the infrastructure stack to enable the engineering team to ship quickly and effectively.
Proactively identify and eliminate bottlenecks in the devops process to ensure optimal developer velocity.
Maintain Tempo chain reliability, validator infrastructure, and explorer reliability.
Tempo is a layer-1 blockchain purpose-built for stablecoins and real-world payments, born from Stripe and Paradigm. They are a team of crypto-optimists building infrastructure for onchain payments.
You'll contribute to infrastructure scaling to infinitely many apps, improving performance and reliability across backend services.
You'll support observability efforts, help implement SLOs, and build foundational services for next-generation cloud infrastructure.
You'll participate in triage and on-call processes to diagnose issues and implement changes to prevent recurrence.
Bubble is an AI visual development platform that empowers anyone to create software without code, from first-time entrepreneurs to enterprise teams. With over 6 million users in more than 100 countries and a mission to break down barriers to entrepreneurship, the company fosters a collaborative and inclusive culture focused on empowering builders worldwide.
Design and implement highly scalable brokerage systems and microservices.
Collaborate with global teams to enhance the core framework and support multiple languages, currencies, and markets.
Act as incident commander during regional business hours, ensuring proactive 24x7 stability.
Alpaca is a US-headquartered global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, fixed income, and more. With a global team of 400+ members spanning multiple countries, we are deeply committed to open-source contributions and fostering a vibrant community.
Lead the team building Alpaca's algo trading platform, designing and architecting with a hands-on approach while writing code and making critical technical decisions.
Own technical direction, roadmap, delivery, day-to-day execution, code quality, production ownership, and people development for a small engineering team.
Require deep expertise in frontend/backend, databases, distributed systems, and low-latency trading systems, with previous leadership experience.
Alpaca is a global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, and more, serving hundreds of financial institutions across 40 countries. Our team of 400+ globally distributed members spans the USA, Canada, Japan, and beyond, backed by $400 million in funding.
Design and build scalable backend services and APIs for LaunchDarkly's Experimentation product.
Own backend components from discovery through monitoring and continuous improvement.
Collaborate with cross-functional teams to translate customer needs into reliable technical solutions.
LaunchDarkly is a feature management platform that helps developers release software faster and safer. The company fosters a collaborative, respectful, and inclusive culture with a focus on team empowerment.