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IO Tech Solutions Limited

Flutter Developer

Open 15d RemoteNorth America

A senior Flutter developer role leading core module development for Web3 wallet mobile applications, including setting technical standards, CI, and mentoring the team. Core stack is Flutter/Dart with native Android/iOS and blockchain familiarity; requires 5+ years mobile and 2+ years Flutter experience plus Mandarin fluency.

Agile Android Blockchain CI/CD Dart +3 skills

Jr. Software Engineer

Open 19d RemoteNorth AmericaFull-timeJunior

Fully remote junior software engineer at Optimum, a Web3 startup building a blockchain data acceleration network powered by RLNC. You'll prototype product ideas with the CTO and CPO, benchmark them against competitors, and iterate quickly using full-stack skills (Go, React/TypeScript) and AI coding tools like Claude Code and Cursor.

AI API Blockchain Claude Code Networking +5 skills

Smart Contract Developer

Open 15d RemoteNorth AmericaContract

Remote Smart Contract Developer (open only to applicants in Asian countries) building Solidity smart contracts for Energi's cross-chain bridge connecting Wanchain and Polygon to the Energi blockchain. Day-to-day work includes protocol implementation, security hardening (reentrancy/replay protection), testing, gas optimization, and documentation; salary is paid in crypto (50% NRG with an 18-month h

Blockchain Cryptography Ethereum EVM SEO +2 skills

IO Tech Solutions Limited

Senior Java Engineer - Liquidity Platform

Open 15d RemoteAPACSenior

A Senior Java Engineer joins the Strategy Service team on a crypto exchange's Liquidity Platform, developing and maintaining high-performance trading infrastructure — microservices, a core strategy engine, and APIs — with a focus on scalability, resiliency, and security.

API CI/CD Docker GraphQL Java +7 skills

IO Tech Solutions Limited

Senior React Native Developer

Open 15d RemoteAPACSenior

A senior mobile engineer who designs, builds, tests, and maintains cross-platform mobile applications in React Native across the full SDLC — from architecture through deployment and monitoring — while optimizing performance, conducting code reviews, and mentoring junior developers.

Agile Cryptocurrency Fintech Java Jest +6 skills

IO Tech Solutions Limited

Software Engineer (WFH)

Open 15d RemoteAPAC

Hong Kong SAR China

Backend engineer building the core of a cryptocurrency trading platform: Java-based trading infrastructure, RESTful/WebSocket APIs for market data and order execution, and a high-concurrency 7x24 trading system. Stack centers on Java, Spring Boot/Cloud, MyBatis, Redis, Kafka, and Elasticsearch.

API Business Development Cloud Design Patterns Elasticsearch +10 skills

Pt Inertia Utama (Member Of Dexa Group)

Senior Blockchain Backend Engineer (Hybrid)

Open 15d HybridAPACSenior

PT Inertia Utama (part of Dexa Group) in Tangerang, Indonesia is hiring a Senior Backend Engineer with a blockchain specialization to design robust APIs, scale backend systems, and build blockchain-enabled applications, ensuring performance, security, and data integrity across distributed services in a hybrid work setup.

DevOps Engineer with Blockchain Experience ONLY

Open 15d RemoteAPACFull-time

Remote senior DevOps engineer (Asia-based) who designs, deploys, and optimizes AWS infrastructure for Energi's blockchain, working with Docker/Kubernetes, GitLab CI/CD, and IaC tools like Terraform and Ansible, plus security monitoring. Salary is paid 50% in NRG and 50% in ETH, with the NRG portion locked for 18 months.

Ansible AWS Blockchain CI/CD Cryptocurrency +13 skills

Senior AI Engineer

Open 16d RemoteLATAM, North AmericaFull-timeSenior H-1B sponsor history

Senior, hands-on AI engineer at Jeeves, a stablecoin-native corporate banking platform, owning end-to-end finance workflows (e.g. invoice-to-payment, expense review, reconciliation): designing production LLM pipelines, agentic systems and RAG, plus evals, monitoring and audit trails. Stack includes Python, LLM APIs (Anthropic/OpenAI), vector databases, PostgreSQL and cloud.

Agentic AI AI Anthropic API AWS +10 skills

Forward Deployed Engineer

Open 16d RemoteLATAMFull-time H-1B sponsor history

Forward Deployed Engineer at Jeeves, a stablecoin-native banking platform, based in São Paulo (remote with office option). You build and ship ERP/accounting integrations in Python/TypeScript/Go using REST APIs and webhooks, design card, AP and treasury flows across fiat and stablecoin rails, and own the technical path to go-live for complex LatAm enterprise customers.

API Data Pipelines Pre-sales Python Rails +6 skills

Desenvolvedor Java Pleno / Backend Engineer Remoto

Mid-level (pleno) Java backend engineer joining BBChain's financial-asset tokenization squad: building and maintaining services and APIs, translating Brazilian financial-market rules into technical solutions, and collaborating through pairing, code review and continuous feedback. Core tech: Java, backend services and APIs.

Desarrollador Backend .Net Senior – Remoto/Híbrido

Open 16d EuropeSenior

Remote backend engineer for a DeFi/Web3 team: designs and implements secure Ethereum smart contracts (Solidity), builds robust APIs to integrate services with blockchains, and optimizes the scalability and security of decentralized applications using Solidity, Go, Rust, or Node.js.

API Blockchain DeFi Ethereum Node.js +5 skills

Desarrollador Backend Blockchain Senior Remoto

Open 16d EuropeSenior

100% remote senior blockchain backend developer role focused on DeFi and Web3 solutions. The developer designs, develops and implements smart contracts and secure APIs, collaborating with frontend and product teams on scalability and performance, using Solidity, Go, Rust or Node.js.

API Blockchain DeFi Node.js Rust +2 skills

Staff Software Engineer, Web3

Open 136d North AmericaStaff

Join us in building the future of finance. Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of…

AI CAD Cloud Cloud Native Data Modeling +5 skills

200K – 235K CAD

Staff Software Engineer, Web3

Open 136d North AmericaStaff

A senior engineer at Robinhood designs and builds core Web3 systems like Robinhood Chain, tokenization tools, and the Robinhood Wallet, while mentoring teams and driving technical excellence in a high-impact finance environment.

AI Cloud Cloud Native Data Modeling Distributed Systems +4 skills

230K – 270K $

Triple A (M) Sdn Bhd

Hands-on Lead Backend Engineer, Crypto Payments & Ledger

Open 16d APACLead

Triple A is hiring a hands-on Lead/Principal Backend Engineer to own the technical direction of its crypto payments money-movement core (wallets, deposits, payouts, settlement, balances), drive a zero-drift double-entry ledger migration and stablecoin flows, and mentor the backend team while shipping code weekly.

Senior Brand & Visual Designer

Open 16d RemoteSenior

Backpack is hiring a Senior Brand & Visual Designer for a fully remote position, focused on brand and visual design work. The posting shares few details beyond the title and a link to apply.

Full Stack Developer

Open 16d RemoteAPAC

Part-time (20 hrs/week) remote full stack developer for Energi, a proof-of-stake cryptocurrency with smart contracts and DeFi, paying $20/hour plus locked ETH/NRG tokens. Day-to-day work focuses on building the website, web apps, and dApps using React/Gatsby front ends integrated with blockchain tools like MetaMask and web3.

Blockchain Cryptocurrency DeFi Ethereum Go +9 skills

20 – 20 $ / hr

Zortech Solutions

RQ09163 - Full Stack Developer

Open 16d North AmericaContract

Full Stack Developer responsible for designing and maintaining large-scale web applications and data pipelines. The role involves working with Java, Oracle/SQL, React, TypeScript, and NodeJS within a microservices architecture, adhering to public sector standards and accessibility regulations.

Accessibility Agile API Azure Azure DevOps +25 skills

85 – 85 CAD / hr

Product Designer

Open 16d Remote

Backpack is hiring a fully remote Product Designer to work on product design for its web3/crypto platform. The posting shares no further detail on responsibilities, stack, or requirements — just the role title and a link to apply.