Senior Blockchain Engineer at Startup Talents

Paris, Ile-de-France, France -

Full Time

Start Date

Immediate

Expiry Date

09 Jan, 26

Salary

240000.0

Posted On

11 Oct, 25

Experience

10 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Blockchain Development, TypeScript, Rust, Go, C++, Smart Contracts, Blockchain Ecosystems, Databases, Data Pipelines, Blockchain Security, Cryptography, Consensus Models, APIs, Indexing, Monitoring, Collaboration

Industry

Staffing and Recruiting

Description

Voici un poste à distance. A Crypto wallet security infrastructure provider are looking for a Senior Blockchain Engineer (Paris, EU or US based). They develop the most secure wallet-as-a-service infrastructure in Web3 : an API-first wallet management system, ideal for applications and organizations seeking to provide secure access to all blockchains through a single integration). APIs and SDKs were designed for wallet programmability and efficient implementations, enabling fast deployments, smart automation flows, as well as granular sets of permissions and policies via secure authentication credentials. They are on the way to become the leading wallet infrastructure for the multi-trillion-dollar digital asset industry. The company is SOC-2 certified, employs 30 people across 6 countries and has raised over $20M since creation with prestigious investors. Their solution is used and trusted by major international corporations. They are looking for a Senior Blockchain Engineer to design, develop, and scale the components that connect our platform to every blockchain network. You’ll work on indexing, data pipelines, and integrations across major networks, while also building smart contracts and analysis tools that make the company's wallet platform faster, more reliable, and easier to integrate. This role is both hands-on and strategic : you’ll improve our blockchain services, our indexing and monitoring infrastructure, and ensure our integrations remain secure and resilient under real-world financial workloads. MISSIONS Design and implement blockchain indexers, data pipelines, and integrations. Develop and maintain smart contracts with a focus on security and performance. Build APIs and services that expose onchain data for wallets and financial apps. Troubleshoot indexing issues, resolve performance bottlenecks, and ensure reliability. Collaborate with product and research to prioritize new blockchain integrations. Contribute to CI/CD, monitoring, and observability for blockchain services. Document systems, share knowledge, and support technical discussions with partners. Profil 8+ years of software engineering experience, with 2+ in blockchain development. Strong in TypeScript, plus ideally one systems language (Rust, Go, C++). Proven experience building blockchain indexers, explorers, or related tooling. Skilled in designing and auditing smart contracts (EVM and non-EVM a plus). Familiar with multiple blockchain ecosystems, both public (Ethereum, Solana, Cosmos, etc.) and private (Besu, Canton, R3 Corda, etc.). Expertise with databases (PostgreSQL, DynamoDB, NoSQL) and data pipelines. Strong understanding of blockchain security, cryptography, and consensus models. Clear communicator with experience collaborating across product and infrastructure. Informations contractuelles Contract : Permanent role (Hybrid remote) in Paris (France) or other EU countries or US (EST times) Remote first company : flexibility to work fully remotely or at an office location of your preference within the European Union. Salary: 160 to 240k USD (or 190 K€) per year on a full-time permanent work contract. Equity: 150-300 stock options vested over 4 years with a one-year cliff. Work essentials: MacBook Pro, iPhone, AirPods, screens, headsets, AirPods, and cables are provided on Day 1 . Training and coursework in Crypto, Blockchain, Security, code, Coding languages and other topics are paid for on-demand to encourage personal and professional growth. Events: fully funded attendance at fintech, blockchain, or related conferences. Teams retreats/meetups/seminars/conferences all around the world to get to meet in-person and foster meaningful connections. Benefits: healthcare and life insurance, retirement plan, sponsored transportation, gym, lunch card, home office equipment, and other perks. Recruitment process : Video call with COO/CTO (30mn). Cognitive and personality tests (45mn). Take home Coding Test in language of your choice Gooup Focus interviews : code review/Architecture review/Security fundamentals/culture fit (30mn x 4). Final interview with Management.

Responsibilities

Design and implement blockchain indexers, data pipelines, and integrations. Develop and maintain smart contracts with a focus on security and performance.