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Software Engineer, Backend Systems

Open 32d North AmericaFull-time

Backend engineer at Fullstack, a startup building a unified crypto trading front end, working on risk/liquidation engines, blockchain state machines, and low-latency REST/WebSocket APIs. Core stack is Rust and Tokio; the role is on-site in San Francisco 5 days per week.

API Blockchain Distributed Systems Docker REST +2 skills

185K – 300K $

SME Tax Manager, Madrid

Open 134d EuropeContract H-1B sponsor history

Company Founded by CPAs, tax attorneys, and engineers, Taxbit is the leading innovator automating global tax reporting for the digital economy. Taxbit's AI-enabled platform streamlines compliance related to digital…

AI Alteryx Automation Business Development Business Intelligence +5 skills

62K – 120K €

Forward Deployed Engineer, Madrid

Open 134d EuropeFull-time H-1B sponsor history

Hybrid forward-deployed engineer role at Taxbit, split evenly between client-facing work (technical pre-sales guidance, demos, owning end-to-end enterprise integrations) and core platform engineering. Day to day involves advising clients, building demos and integrations, and shipping platform features with TypeScript, Node.js, and React on AWS.

Agile AI API Automation AWS +18 skills

Marketing Designer

Open 32d On-siteNorth America

Junior–mid level marketing designer at fomo, a crypto trading app, working in-person at the SoHo, NYC office. Day to day: turning brand and product direction into shipped creative across digital, social, paid, and experiential channels, primarily using Figma and Adobe Creative Suite.

Adobe Creative Suite Figma Typography

100K – 160K $

AI Automation Engineer

Open 32d LATAMFull-time

Ripio (a leading Latin American crypto company) is hiring an AI Automation Engineer based in Argentina to work full-time with a staff area: automating manual processes and building LLM-powered agents, bots, and internal tools integrated with Slack, internal APIs, and third-party services, deployed end-to-end with CI/CD. Backend experience (Go/Java/Python) and hands-on agent-building experience are

AI API Automation Blockchain CI/CD +4 skills

Product Owner

Open 33d RemoteEurope

Citron is hiring a Crypto Processing Product Owner/Head of Product to own and prioritize the product backlog, run agile ceremonies, and write specs for crypto payment flows (integrations, custody, transactions), collaborating with engineering, design, compliance, finance, and external partners.

Acceptance Criteria Agile Analytics API Blockchain +6 skills

Growth Data Analyst

Open 32d On-siteAPAC

Growth Data Analyst at Bithumb, a Korean cryptocurrency exchange, working on-site in Seoul (Gangnam) to plan and analyze data-driven projects that increase trading activity. Day-to-day: analyzing customer journeys and churn signals, designing A/B tests, validating exchange policies via correlation analysis, building KPI dashboards, and automating analysis/reporting with AI tools.

Fullstack Engineer / AI Engineer for BRAIINS MANAGER

Open 32d HybridEuropeContract

Fullstack/AI engineer building Braiins Manager, the cloud platform for remote management of Bitcoin mining fleets, owning features end to end (NestJS/TypeScript, PostgreSQL, Redis, Kafka/BullMQ, gRPC, Angular/React, a Rust daemon, Kubernetes) plus developing the company's internal LLM agent platform (MCP, retrieval, orchestration, evals). Prague office or fully remote.

Accessibility AI Angular API Cloud +23 skills

Senior Product Manager, Transact

Open 80d North AmericaSenior

Lead product strategy and execution for Auth, a high-demand crypto/stablecoin account-linking service that enables secure fund transfers between exchanges/wallets and partner platforms.

API Blockchain CI/CD Fintech Jira +2 skills

Senior Software Engineer - Go

Open 33d RemoteEurope, North AmericaSenior

Senior engineer building and optimizing high-throughput, low-latency Go services for QuickNode's blockchain RPC infrastructure. Day to day: architecting distributed systems, owning delivery through production, improving uptime/latency, and debugging complex production issues.

API Blockchain Developer Experience Distributed Systems Web3

Senior Software Engineer - Go & Rust, Blockchain Infrastructure

Open 33d RemoteEurope, North AmericaSenior

Senior engineer at QuickNode designing, building, and operating high-throughput blockchain infrastructure in Go and Rust. Day to day: owning distributed systems from architecture through production, improving reliability, performance, and security, debugging production failures, and mentoring engineers.

API Blockchain Distributed Systems Networking Observability +2 skills

Quant Trading Analytics Engineer

Trading Analytics Developer on Crypto.com's Quant Trading team, building robust data pipelines, analytics, and AI tooling that bridge high-performance crypto trading systems with modern AI capabilities. Core stack: Python/Java on Linux, cloud, Kafka, Spark, and AI platforms. Hybrid or remote work supported.

AI Analytics Cloud Data Analytics Data Pipelines +5 skills

Senior Full Stack Engineer (Top Market Maker)

Open 33d HybridUKSenior

Senior full stack engineer at a digital-assets trading firm in London, owning features end-to-end across backend services, real-time APIs and React interfaces for traders and clients. Preferred stack is React + Go (Python also considered), deployed on AWS with CI/CD and strong security practices.

API Authentication AWS CI/CD Observability +3 skills

Software Engineer, Trading Product

Open 82d North AmericaFull-time

Build experimental trading products on the Aptos blockchain, including APIs, indexing services, and data pipelines for scalable trading infrastructure.

AI API Blockchain Data Pipelines DeFi +2 skills

150K – 250K $

Full Stack Engineer

Open 33d On-siteMENA

Full stack engineer at crypto payments company Oobit building end-to-end features across a React Native mobile app, React web frontend, and Node.js/NestJS backend APIs. Day to day includes shipping tested code, debugging production issues, and using AI coding tools like Cursor or Copilot.

AI API Claude Code Git JavaScript +7 skills

Remote Blockchain Backend Engineer - Scale Secure Systems

Open 33d RemoteAfrica

Fully remote Blockchain Backend Engineer role: design and deploy backend services, optimize blockchain protocols, and help shape system architecture for blockchain products. Core focus areas are distributed systems, cryptography, and scalable backend development.

Blockchain Cryptography Distributed Systems

Media Buyer Facebook/Google/TikTok/Telegram/Tabula (Crypto/Nutra/Біла вертикаль)

Open 88d RemoteWorldwide

Media Buyer runs paid ad campaigns on Facebook, Google, TikTok, Telegram, and Tabula to drive traffic and conversions for crypto and nutraceutical products, using proprietary CRM tools.

Technical Product Manager (Hardware Security & IP)

Open 102d RemoteEuropeC-level

A Technical Product Manager for Hardware Security & IP bridges hardware/software/firmware teams to define and prioritize cryptographic security solutions (e.g., post-quantum algorithms) in RISC-V-based MCUs, translating technical specs into product roadmaps and customer-driven requirements.

CI/CD Cryptography Embedded Software Firmware GitLab

HYDRAX DIGITAL ASSETS PTE. LTD.

RegTech AI Engineer: Production ML & Data Pipelines

AI Engineer at Hydrax Digital Assets in Singapore designing, deploying, and operating AI systems for compliance, onboarding, and operations in a regulated financial environment — building production-grade data pipelines and end-to-end ML workflows with Python, orchestration frameworks, vector stores, and model APIs.

AI API Machine Learning Python Regulatory Compliance

Eclipse Trading

Network Engineer

Open 130d On-siteAPAC

Designs, secures, and troubleshoots enterprise networks for a proprietary trading firm, focusing on Cisco switches, FortiGate firewalls, and data center infrastructure across Hong Kong, Shanghai, or Sydney.

AI BGP Ccna CCNP Cisco +13 skills