Blockchain Developer, Java

🕒 July 19

🇺🇸 United States – Remote

⏳ Contract/Temporary

🟠 Senior

🔴 Lead

⛓️ Blockchain Engineer

👻 Ghost score 31%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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IntellectEU

WebsiteLinkedInAll Job Openings

201 - 500 employees

💼 Consulting

📦 Logistics

📣 Marketing

💰 Venture Round on 2017-06

Consulting • Logistics • Marketing

IntellectEU is a global technology company that specializes in digital finance innovation and payment modernization. With over 18 years of experience, it provides enterprise-scale solutions in cross-border payments, market infrastructure, and sustainable finance. IntellectEU is known for leveraging blockchain, smart contracts, and digital assets technologies to innovate and provide seamless connectivity between traditional and modern financial systems. It is recognized for its expertise in the financial technology space, working closely with enterprises to create new digital market infrastructure and integrate on- and off-chain payment solutions.

📋 Description

• Own delivery of core backend services supporting wallet operations, asset transfers, transaction orchestration, blockchain integrations, and event-driven workflows at scale within regulated financial environments • Implement and operationalize fault-tolerant, secure, and scalable backend services • Build API-first services integrating blockchain networks, third-party provider solutions, and internal systems with strong consistency guarantees • Implement secure service communications using cryptographic signatures, key management, and zero-trust architecture principles • Operationalize event-driven systems using Apache Kafka and asynchronous messaging patterns • Build highly available, strongly consistent, horizontally scalable services • Implement concurrent and asynchronous processing patterns for multi-threaded workloads • Integrate Web3 SDKs and libraries for on-chain interactions, transaction signing, and state monitoring • Implement structured logging, distributed tracing, metrics, and OpenTelemetry instrumentation • Maintain high test coverage through automated unit, integration, and functional testing frameworks within CI/CD pipelines • Produce and maintain technical documentation, API specifications, and operational runbooks • Collaborate with a Web3 engineering team supporting digital finance and emerging technology solutions

🎯 Requirements

• 7 or more years of software engineering experience building and operating production-grade backend systems in regulated financial or enterprise environments • Experience with blockchain networks, smart contracts, consensus mechanisms, crypto integration, or tokenization platforms • Extensive hands-on proficiency in Java and Spring Boot • Comfort operating across polyglot stacks • Deep expertise in API-first design, RESTful service contracts, and microservices architecture patterns • Strong command of concurrent, multi-threaded, and asynchronous programming models • Proven track record delivering highly available, strongly consistent, and distributed applications • Hands-on experience building event-driven solutions using Apache Kafka • Strong understanding of CI/CD, DevSecOps practices, secure SDLC, and automated security controls • Hands-on experience with OpenTelemetry, distributed tracing, and observability platforms • Strong technical writing skills; demonstrated ability to produce API specs and runbooks • Proven experience using Web3 libraries and SDKs (Web3.js, Ethers.js, or equivalent) • Nice to have: Extensive hands-on proficiency in TypeScript, Node.js, and/or NestJS • Nice to have: Direct experience with Ethereum, Bitcoin, Solana, XRPL, and other distributed ledger technologies • Nice to have: Familiarity with MPC, HSMs, and enterprise key management systems • Nice to have: Experience implementing Zero Trust security architecture end-to-end • Nice to have: Knowledge of tokenization, stablecoins, settlement systems, and digital asset operations • Nice to have: Contributions to open-source blockchain projects or Web3 tooling

🏖️ Benefits

• International experience in a stable company • Innovative, casual, positive, and open work environment • Opportunities for personal and professional development • Chance to change the way the business works in the financial world • 3-month initial contract with prolongation possibility