Design and implement scalable backend services and APIs for a high-performance crypto wallet.
Manage databases (PostgreSQL, MongoDB) and implement caching with Redis for optimized performance.
Deploy applications on cloud platforms and collaborate with frontend developers to ensure seamless integration.
Solflare is a fast-growing crypto wallet providing a powerful gateway to Web3, securing over $20 billion in digital assets with 4 million monthly active users. With a team of nearly 150 people across offices in Croatia, Serbia, and remote globally, Solflare fosters a culture of curiosity, grit, and accountability, encouraging bold challenges and ego-free collaboration.
Own transaction processing platform infrastructure for signing and settlement flows, including service design and operational health.
Design data models, API contracts, and retry/backoff logic; write RFCs relied on by Banking and Blockchain engineers.
Define production readiness with SLOs, alerting thresholds, and runbooks; lead incident response and postmortems.
The Cari Network builds blockchain-based payment systems for real-time digital money movement across finance and digital assets. As a pre-launch startup, we are creating new financial infrastructure bringing cash on chain through tokenization.
Work on features to increase speed and functionality of trading infrastructure, including new algorithms and exchange integrations.
Play an active role in executing system architecture and roadmap, collaborating with Product Management.
Grow to become an expert in entire trading systems and use deductive reasoning to solve complex problems.
sFOX is a full-service prime dealer that unites liquidity from over 30 exchanges and OTC desks. Founded in 2014, the company is backed by prominent investors and has a rapidly growing team.
Implement components across the on-chain transaction lifecycle, including calldata construction, signing requests, and nonce management.
Build new features within the institutional custody signing pipeline, including submission paths and asynchronous transaction handling.
Write comprehensive automated tests for backend services and smart contracts, and participate in an on-call rotation.
Cari is building blockchain-based payment infrastructure that enables real-time, 24/7 movement of digital money across traditional financial institutions and the digital asset ecosystem. As a pre-launch startup, they offer a remote-first environment with close collaboration from an experienced founding and engineering team.
Build and maintain distributed systems for custody of digital assets, including cash, coins, NFTs, and staking.
Lead medium-to-large projects, breaking down tasks, estimating scope, and ensuring code quality and testing.
Collaborate cross-functionally, mentor team members, and share knowledge to avoid single points of failure.
Anchorage Digital builds a digital asset platform for institutions to participate in crypto through custody, staking, and trading. Founded in 2017, it has over 600 employees and is valued over $3 billion, with a culture focused on security and inclusion.
Build a durable, multi-source ingestion pipeline that connects to external sources, transforms and deduplicates events, and routes them to specialized stores.
Develop a web application for visualizing and querying data, including interactive views.
Design a data access layer spanning relational, graph, and analytical stores, respecting each engine's strengths.
Founded in 2019, Reveal is a startup delivering software tools and intelligence for operators in remote, extreme environments. They provide a tactical intelligence platform for defense and security missions, and are scaling their team to meet the demands of modern warfare.
Develop and maintain backend services and APIs in Go
Design and optimize PostgreSQL schemas and queries for high-volume data
Build reliable orchestration and integration layers across internal and third-party systems
Oneleet is a security and compliance platform that helps companies build, manage, and monitor cybersecurity programs and achieve compliance standards such as SOC 2 and ISO 27001. Having raised a $33 million Series A, we are rapidly growing with a team of experienced security professionals and a culture of autonomy and impact.
Develop and maintain backend APIs and business logic using Node.js, TypeScript, and Express.
Build scalable solutions for transactional systems and API integrations.
Support frontend experiences with React Native and Next.js when needed.
The company builds scalable digital products for financial and rewards-based experiences. It operates as a remote-first startup with a global team and a culture focused on innovation, ownership, and professional growth.
Design and evolve mission-critical APIs for a modern developer platform.
Build secure, scalable backend services using TypeScript, Node.js, and modern frameworks.
Collaborate with engineers across teams to deliver reliable systems that improve developer experience.
Jobgether is a platform that uses AI-powered matching to connect candidates with job opportunities. They focus on efficient, objective hiring processes and are part of a network of partner companies.
Develop frontend and backend features for Akash Console
Build and maintain public APIs and SDKs for partners
Work on automated tests and CI/CD automation
Akash Network is developing the world’s first decentralized cloud computing marketplace, enabling any data center to become a cloud provider by offering unused compute cycles. They are a remote-first, distributed team of open source and blockchain developers from leading technology companies.
Build and own backend services, infrastructure, and data systems for a leading US trading platform.
Solve complex scalability challenges while gaining deep expertise in U.S. financial systems.
Collaborate with cross-functional teams and maintain high code quality through thorough reviews.
Devexperts works with respected financial institutions, delivering products and tailor-made solutions for retail and brokerage houses, exchanges, and buy-side firms. The company has over 200,000 daily users and offers a culture focused on high performance, low latency, and fault tolerance.
Design, develop, and operate ledger and payments services for accurate crypto and fiat money movement.
Build scalable APIs and data models to support new transaction types while ensuring correctness and auditability.
Partner with cross-functional teams and mentor teammates to deliver production-grade code.
Gemini is a global crypto and Web3 platform founded by the Winklevoss twins, offering secure crypto products in over 70 countries. The publicly traded company emphasizes building diverse teams and fostering an open, fair, and secure cryptoeconomy.
Own the core financial engine including order routing, execution lifecycles, and internal ledgers.
Build resilient, high-throughput infrastructure for scaling from early users to hundreds of thousands of investors.
Take end-to-end operational ownership including monitoring, incident response, and on-call rotations.
Nahc is a seed-stage venture-backed cross-border neobank and retail brokerage built for global investors, bridging financial borders between the US and Asian markets. The company is small and emphasizes absolute trust, rock-solid infrastructure, and high agency for its founding engineering team.
Build backend services and APIs for onboarding, accounts, payments, cards, transfers, rewards, travel, FX, KYC and risk flows.
Design reliable systems that can support real customer transactions, operational workflows and future financial products.
Integrate with internal systems, financial partners, payment providers, AI services and third-party platforms.
BJAK is a mobile-first insurance platform enabling insurance accessible online, and now expanding to spending, saving, investing, and more. Founded in 2019, the company has a global team of over 20 nationalities and seeks talented, driven individuals who work for passion.
Build and maintain web applications for scientific communities and research-focused users.
Develop robust APIs, backend services, and scalable application architectures.
Contribute to Web3 infrastructure initiatives including blockchain features and smart contracts.
A mission-driven company building products at the intersection of technology, science, and decentralized innovation. They are a remote-first, async-friendly team with a small, collaborative culture focused on meaningful global impact.
Build and maintain API integrations with OEMs and energy partners, ensuring reliability and performance.
Improve the connectivity platform by reducing incidents and enhancing observability.
Develop automations and internal tools to streamline integration monitoring and testing.
Enode provides the infrastructure layer that connects and orchestrates energy devices for energy companies. We are a mission-driven startup backed by Y Combinator, Lowercarbon Capital, and Creandum, with a collaborative and supportive culture.
Design and build scalable backend services using Go and Rust.
Develop and maintain multi-source data ingestion pipelines and web applications.
Implement cloud-native deployments and observability practices.
This partner company builds advanced software systems supporting critical operations in complex environments. They offer a collaborative environment with opportunities for professional growth and technical ownership.
Design and build high-performance backend services and APIs for early-stage startups.
Optimize databases, caching layers, and event-driven architectures.
Collaborate with cross-functional teams to align backend strategy with business goals.
SignalFire is a venture capital firm that partners with early-stage startups shaping the future of technology. Our portfolio spans 200+ companies across AI, cybersecurity, healthtech, and fintech.
Develop and maintain high-performance backend services and platform components using Rust.
Design and implement scalable APIs and asynchronous microservices for distributed systems.
Collaborate with Product, DevOps, and Security teams to integrate cybersecurity features and ensure robust, secure solutions.
Exein builds the security layer for a world where physical and digital threats converge, from kernel-level runtime protection on embedded devices to cloud-native platforms. They are a growing company with a culture of technical excellence, continuous learning, and inclusive collaboration.
Design, develop, and maintain scalable backend services, microservices, and RESTful APIs.
Deliver features from initial design through deployment, including testing, code reviews, and production releases.
Mentor junior engineers and contribute to architectural decisions.
Partner company develops modern software products with a focus on building scalable, high-performance backend solutions. Its fully remote engineering team values ownership, technical excellence, and continuous improvement.