Staff Front-end Engineer (f/m)

Status
Paris, France
Full time
Hybrid
Compensation is not specified
Role
Frontend Engineer
Description

We are dedicated to democratizing access to digital assets and ensuring their security on a global scale. Ledger, established in 2014, serves as a leading platform for digital assets and Web3 technology. Our Ledger Nanos are responsible for safeguarding over 20% of the world's crypto assets. With headquarters in Paris and Vierzon, we also have operational bases in the UK, US, Switzerland, and Singapore, boasting a diverse team exceeding 700 professionals. Ledger innovates a range of products and services that empower individuals and businesses to securely transact, store, exchange, expand, and manage crypto assets. One of our core offerings is the Ledger hardware wallets which have already captured a market of over 7 million units across 200 countries.

At Ledger, we espouse the values of Pragmatism, Audacity, Commitment, Trust, and Transparency, shaping a dynamic work environment for our team members. Achieve insight into our company culture by listening to testimonials from our staff.

Ledger has introduced Ledger Live, an application designed for managing blockchain-based assets. Developed using React.js technology, this application avails support for multiple blockchains, including coins and NFTs. Additionally, it facilitates integration with DApps and offers an SDK for seamless collaboration with third parties. The interface, backed by our hardware wallets, allows users to efficiently manage their crypto assets. Various dedicated teams collaboratively work on distinct aspects of this software application.

In line with our ambitious growth plans, we are seeking a Staff Front-End Engineer to join the Wallet Experience business unit. Operating within the Live Hub squad, your central responsibilities will revolve around constructing and upkeeping the UI flows for portfolio and account management.

Main Responsibilities:

  • Embrace full ownership of desktop and mobile Ledger Live Applications development from a technical viewpoint.
  • Engage in active collaboration with developers, QA specialists, designers, and product professionals within the Ledger Live teams.
  • Demonstrate initiative by proposing and implementing technical solutions.
  • Develop features employing best practices encompassing unit to end-to-end testing methodologies.
  • Participate in conducting thorough code reviews.
  • Uphold the quality standards of Ledger's UI/UX framework.
  • Foster mentorship opportunities and drive technological progress within the team, ensuring the establishment of high standards.
  • Devote your efforts entirely to Open Source projects accessible through our monorepo.

Required Skills:

  • A seasoned software development professional with a minimum of 10 years of relevant experience.
  • A naturally inquisitive mindset coupled with a positive attitude conducive to team collaboration.
  • Strong competence in JavaScript and TypeScript.
  • Proficiency in [React.js] development, along with a knack for navigating development tools and libraries.
  • Sound understanding of effective testing strategies.
  • Good knowledge of UI/UX practices intertwined with software development.

Desirable Skills:

  • Familiarity with React Native and Electron.
  • Exposure to Web3 topics and technical stack.
  • Prior experience managing a repository of shared components.

Benefits Include:

  • Equity options to align employees with the company's growth trajectory.
  • Hybrid work policy offering flexibility.
  • Organized company events and casual social gatherings.
  • Comprehensive health insurance coverage, including medical, dental, and vision care.
  • Facilities for personal development, coaching, and fitness programs.
  • Generous annual paid leave, in addition to national holidays and RTT days.
  • Access to premium office equipment and high-quality gadgets.
  • Transport reimbursement scheme for preferred modes of commuting.
  • Employee discount available on our range of products.

We uphold our commitment to being an equal opportunity employer, fostering a inclusive workplace environment devoid of discrimination based on gender, ethnicity, religion, sexual orientation, social status, disability, or age.

Skills Required
Avatar
Ledger
Company size
Not specified
Location
United States
Description
Not specified
Status

More Full-time Jobs

Show more

Developer Relations Coordinator

Full time
Remote
The Nervos Community Catalyst (NCC) is an organisation supported by the Common Knowledge Base Association (CKBA). It aims to strengthen productivity in the CKB community through a range of initiatives. Its work focuses primarily on developers, but may also support other productive activities, such as content creation and community activism.
For further information, see the NCC website and announcement post.
Job Description
The Developer Relations Coordinator (DevRel Coordinator) oversees, tracks and coordinates developers participating in the CKBuilders and Build on CKB programmes. The DevRel Coordinator is the main point of contact for new builders working through CKB and Fiber documentation, helping them find relevant resources and connecting them with DevRel or other technical contributors when needed.
The DevRel Coordinator also maintains close relationships with developers participating in NCC programmes and helps coordinate communication and support between these builders and CKB developer teams. The role also involves highlighting selected developer contributions to the wider community through social media.
The DevRel Coordinator is a full-time contractor and reports to the NCC Director through regular meetings.
Key Responsibilities
Track and engage with active CKBuilders, CKBuilder alumni and Build on CKB members, maintaining regular communication and following up on project progress and support needs.
Redesign and maintain the CKBuilder project tracker.
Improve the visibility and presentation of developer activity across NCC programmes.
Act as the first point of contact for developers with questions, directing them to appropriate resources or connecting them with DevRel and other technical contributors when needed.
Provide constructive feedback on developer ideas and projects within the scope of the role.
Develop developer engagement strategies on CKBoost and design campaigns where appropriate.
Review weekly reports submitted by CKBuilders and follow up on progress or issues where needed.
Showcase developer activity through social media posts.
Contribute strategic input on NCC's positioning.
Optional Additional Responsibilities
The following responsibilities may be added for higher remuneration:
Represent NCC at regional CKBuilder events, where feasible.
Manage developer payroll.
Person Specification
Essential
Strong written communication skills.
Professional approach.
Proactive work ethic.
Strong organisational skills.
Ability to respond to queries within a reasonable timeframe.
Background in computer science.
A sound technical understanding of blockchain and CKB.
Highly Desirable
Bilingual in English and Chinese.
Familiarity with the CKB ecosystem, documentation, tooling and development teams.
Experience working with developers or coordinating technical projects and contributors.
Ability to solve problems and design solutions where needed.
Understanding of the crypto industry and wider technology and market trends.
Experience using AI tools.
Desirable
Ability to work asynchronously.
Payment in Crypto
3,000-5,000
Monthly
See details

Founding Technical Partners for Oferli – Elite Web & Mobile Development Team🌐

Remote, USA
Remote, USA
Part time
Remote
I am Sadr, CEO of Oferli. We are building a high-performance, elite technical team, and I am looking for 5 to 10 dedicated founding technical partners to join me in this mission.
​The Vision:
Oferli is a 100% decentralized ecosystem. While we are rooted in Web3, our expertise spans across professional web and mobile application development. We are not just another agency; we are crafting the next generation of digital solutions. Our goal is to set a new standard for excellence, transparency, and decentralization.
​What I am looking for:
I am building a professional, senior-level "Elite Team." I am looking for partners who are truly passionate about the vision—not just short-term gains. By combining our individual expertise and portfolios, we will establish Oferli’s collective professional reputation.
​Requirements:
​Proven Expertise: You must be a senior-level professional. Please provide your portfolio showcasing your best work in web and mobile development.
​Commitment: This is a founding partnership. We are looking for those who believe in the mission and are ready to tackle complex challenges together.
​Professionalism: We operate with high standards. Communication and efficiency are key.
​How We Work:
​Collaboration: We use professional, secure channels for all communications. Qualified candidates will be contacted via email to be invited to our private workspace on Notion to align on our roadmap and launch our upcoming projects.
​Decentralized Operations: We leverage Web3 tools for collaboration and compensation, maintaining a fully decentralized environment.
​Growth: We are launching with a core team of at least 5 founding partners, scaling to 10, to deliver high-impact results for our clients.
​Application Process:
If you are a senior professional ready to build a world-class, decentralized ecosystem, apply here on LaborX. Qualified candidates will be contacted via email for further professional vetting and onboarding.
​Let’s build the future, together.
​Sadr B
CEO, Oferli
Payment in Crypto

Senior Blockchain Engineer (Cosmos SDK & IBC)

Hong Kong
Hong Kong
Full time
Remote
Merklio is expanding its cross-chain orchestration layer. We are building a sovereign app-chain (Rollup-style) that aggregates liquidity from multiple L1s via IBC. We need a Blockchain Engineer to design, implement, and maintain our Cosmos-based chain.
Expectations:
Design custom modules (x/staking, x/rewards, x/merkl)
Implement IBC light clients and relayers
Optimize block time and state pruning
Write comprehensive unit & integration tests (Go test)
Build CLI tools for validators and delegators
Monitor node health and network upgrades
Collaborate with the research team on MEV-resistant ordering
Maintain chain upgrades (v1 → v2) with migration scripts
Write technical documentation for external validators
Nice to have:
Experience with Avalanche Subnets or Polkadot Substrate
Knowledge of HSM and key management
Open-source contributions to Cosmos SDK or related repos
Chinese+English language proficiency
Payment in Crypto
7,000-10,000
Monthly
See details

Smart Contract Engineer (Solidity / Rust)

Hong Kong
Hong Kong
Full time
Remote
Merklio is building a modular settlement layer for institutional staking. We are looking for a Smart Contract Engineer who will own the core vault contracts, liquid staking tokens, and reward distribution mechanisms.
Expectations:
Design and deploy upgradeable proxy contracts (UUPS)
Write high-assurance tests with invariant testing (Foundry)
Implement access control (Ownable2Step, roles)
Integrate with Chainlink Automation and CCIP
Write Natspec docs and deployment scripts
Participate in internal security reviews and bug bounties
Optimize storage layouts to reduce gas costs by >15%
Collaborate with the research team on novel staking mechanisms
Nice to have:
Experience with LayerZero or Hyperlane
Published audit reports or contest wins (Code4rena / Sherlock)
Knowledge of ZK-proofs (basic)
Chinese language proficiency
Payment in Crypto
8,500-12,000
Monthly
See details

Senior Blockchain Engineer - Low-Latency Execution Infrastructure (HyperEVM / Hyperliquid)

Full time
Remote
 
 
we’re looking for a senior blockchain engineer to build low-latency execution infrastructure around hyperevm and hyperliquid-related trading systems.
 
this is not a frontend or dapp role. the focus is on real-time execution systems, chain-native infrastructure, and market-aware backend engineering where latency, ordering, and state correctness directly impact execution outcomes.
 
you will work on systems that operate under noisy, adversarial, and highly dynamic conditions, including delayed or missing websocket events, rpc inconsistencies, transaction lifecycle complexity, state desynchronization, retries, and recovery logic.
 
core responsibilities include building and maintaining realtime blockchain data pipelines, websocket and rpc streaming systems, execution orchestration layers, liquidity-aware routing logic, transaction lifecycle management, and integration with orderbook and market data systems.
 
we are specifically looking for engineers who think in systems rather than features. meaning understanding how data flows through pipelines, how state evolves over time, how failures propagate, and how to design systems that recover automatically without manual intervention.
 
areas of work include:
 
- realtime blockchain data ingestion
- mempool-aware execution flows
- transaction lifecycle handling
- execution sequencing and routing
- websocket and rpc infrastructure
- state synchronization systems
- liquidity and orderbook integration
- performance and latency optimization
 
you should be comfortable working with distributed systems, asynchronous event processing, and latency-sensitive backend architectures.
 
strong experience in one or more of the following areas is highly relevant:
 
- exchange infrastructure
- trading systems
- execution engines
- blockchain indexers
- realtime event systems
- arbitrage systems
- rpc/node infrastructure
- defi backend systems
- low-latency backend engineering
 
preferred technical stack:
 
- typescript / node.js
- go
- rust
- python
- postgres
- clickhouse
- redis
- kafka or similar messaging systems
- docker
- linux environments
- evm rpc internals
- websocket infrastructure
 
ecosystem familiarity:
 
- ethereum, arbitrum, base, optimism, bsc
- hyperliquid / hyperevm
- foundry
- ethers.js / viem
- geth / erigon / nethermind
- dex and amm mechanics
- liquidity math, slippage, gas strategy, routing logic
 
this role is not suitable for:
 
- frontend-only developers
- nft or basic dapp experience only
- tutorial-level web3 developers
- candidates without production systems experience
 
we value engineers who have built real systems where correctness, latency, and reliability matter under load. we care less about buzzwords and more about concrete systems you have personally built and operated.
 
ideal candidates can clearly explain:
 
- system architecture decisions
- bottlenecks and tradeoffs
- failure modes and recovery strategies
- latency considerations in real systems
- production debugging experience
 
working style:
 
- remote
- async-first
- low bureaucracy
- high ownership
- engineering-driven team
- direct technical communication
 
we strongly prefer practical engineering depth over polished presentation. if you have built or worked on systems involving realtime data, trading infrastructure, blockchain execution, or latency-sensitive backend systems, please include details of those systems when applying.
 
Payment in Crypto
6,000-13,500
Monthly
See details