Senior Back-End Engineer, DeFi Wallet
Paris, France
Full time
Office
Compensation is not specified
Role
Backend Engineer
Description
DESCRIPTION
Blockchain.com is the forefront software platform for digital assets globally. We are seeking Kotlin and Solidity Developers with expertise in blockchain protocols and EVM networks. As a backend engineer on the DeFi team, you will be involved in a variety of projects, such as enhancing our non-custodial wallets network support and developing smart contracts. Additionally, you will be tasked with integrating third-party vendors supplying data for crypto tokens, DApps, and DAOs and centralizing logic from wallet clients into backend services.
In the role of a Senior Back-End Engineer, your responsibilities include leading technical discussions, influencing the approach, and advocating for best engineering practices to positively impact the team's development.
RESPONSIBILITIES
- Develop robust, reliable software to manage multiple networks and support our expanding range of products and users
- Collaborate with an engineering team dedicated to maintaining high standards and deploying secure and high-performing systems
- Engage directly with multiple blockchains in the core of Blockchain.com's solution
- Utilize open source technologies like Docker, Kafka, and MySQL
- Prioritize security in all aspects of the work
- Collaborate with interdisciplinary teams to consistently deliver high-quality products
- Optimize existing systems for scalability, extensibility, and performance while creating reusable, modular code for various Blockchain.com products
REQUIREMENTS
- Integrity, the most essential quality for this role
- Proficiency in Typescript, Solidity, and ideally Kotlin/JVM
- Experience with Blockchain technologies, particularly EVM or non-EVM chains and defi protocols
- Strong motivation, self-driven, and enthusiastic about cryptocurrencies
- Comprehensive understanding of blockchain systems and ideally prior experience working closely with one
- Ability to navigate novel challenges and curiosity to learn new technologies
- Advocacy for best engineering practices, proficiency in multiple programming languages, and a practical approach to solving complex problems
- Commitment to high levels of test coverage, technical documentation, and effective monitoring
- Accountability for all assigned projects
COMPENSATION & BENEFITS
- Competitive salary based on experience and equity in a leading company
- Prime office location in Paris with mandatory on-site work for four days per week
- Work from Anywhere policy
- Opportunity to play a significant role and progress in a rapidly expanding technology company within an emerging industry
- Unlimited vacation policy, inclusive of performance-based bonuses paid in cash
- Company-issued Apple equipment
Skills Required
Blockchain.com
Website
www.blockchain.comCompany size
Not specified
Location
United States
Description
Not specified
ghed santos
Founding Head of Engineering
San Francisco, USA
San Francisco, USA
Full time
Remote
About The Project:The project is a venture-backed stealth mode project having raised $2 million and building a Social Intelligence Engine designed to power smarter, faster crypto trading. We're combining advanced data infrastructure and real-time intelligence to unlock new trading possibilities. About the Role:We're looking for a tech-savvy, investor-facing leader with an engineering background to represent us on the frontlines. This is not a research role it's about amplifying our voice, building relationships, and being the bridge between our technology and the world. Key Responsibilities:1）Represent us externally at hackathons, pitch events, conferences, and investor meetings.2）Be our lead evangelist clearly explaining our tech vision to both technical and non-technical audiences.3）Drive fundraising efforts with compelling presentations, clear strategy narratives, and investor Q&A.4）Partner closely with engineering/product to demo the platform, shape the roadmap, and turn market feedback into action. Requirements:1）Strong engineering background (AI, blockchain, data infrastructure, or similar).2）Proven experience in investor-facing roles, including fundraising and pitching.3）Excellent presentation and communication skills, with a track record of representing projects publicly.4）Experience participating in or leading hackathons, demos, and tech events.5）Understanding of consumer behavior data in gaming and apps is a plus.6）Familiarity with Web3, crypto, and developer communities. Compensation:Competitive salary + equity + team token + and performance-based incentives.
Payment in Crypto
Velora
NFT Lore Weaver/Character Architect (Web3 Storytelling Expert)
Dubai, United Arab Emirates
Dubai, United Arab Emirates
Full time
Remote
We seek a crypto-proven storyteller to craft NFT characters that shape our multichain MMO economy. Your lore will live on-chain, your creations will trade like assets, and your ideas will govern factions across 11+ blockchains.
Responsibilities:
- Design dynamic NFTs with traits tied to DAO votes, token prices & player behavior
- Embed DeFi mechanics into character backstories (e.g., liquidity pools as "magic reservoirs")
- Collaborate with devs to implement ERC-6551 narrative systems
Requirements:
- Shipped 2+ NFT collections (>1 ETH volume) – share contract addresses
- Fluency in Web3 concepts (MEV, bonding curves, ERC-721A)
- Active in NFT communities (Discord roles as proof)
Rewards:
- 3-7% royalties from your NFT sales
- Governance over plotlines via Lore DAO
- 0.5% of all in-game trades involving your work
Responsibilities:
- Design dynamic NFTs with traits tied to DAO votes, token prices & player behavior
- Embed DeFi mechanics into character backstories (e.g., liquidity pools as "magic reservoirs")
- Collaborate with devs to implement ERC-6551 narrative systems
Requirements:
- Shipped 2+ NFT collections (>1 ETH volume) – share contract addresses
- Fluency in Web3 concepts (MEV, bonding curves, ERC-721A)
- Active in NFT communities (Discord roles as proof)
Rewards:
- 3-7% royalties from your NFT sales
- Governance over plotlines via Lore DAO
- 0.5% of all in-game trades involving your work
Payment in Crypto
Velora
DevOps Engineer
Singapore
Singapore
Full time
Remote
Mission: Fortify sovereign infrastructure for a player-owned economy where downtime = lost kingdoms.
Responsibilities:
Architect zero-downtime multichain ops (Arbitrum/BASE rollups, fraud-proof autoscaling)
Design self-healing node clusters that counter NFT minting DDoS attacks in <5ms
Embed on-chain circuit breakers to halt exploits before they drain $CORE liquidity
Turn Discord FUD storms into infra stress metrics via custom LLM pipelines
You’re a Fit If:
You’ve slashed gas costs by 30%+ in past DeFi/GameFi projects (prove it)
Your idea of “monitoring” includes MEV bot behavior and DAO vote latency
You’ve built systems where “chaos testing” means simulating chain splits during PvP wars
You see player rage-quits as a critical infrastructure metric
Compensation:
Base + % of rescued gas fees (paid in $CORE)
NFT “Backbone” Pass (permanent % of protocol revenue)
DAO voting power scaled to uptime milestones (*99.99% SLA = veto rights*)
Responsibilities:
Architect zero-downtime multichain ops (Arbitrum/BASE rollups, fraud-proof autoscaling)
Design self-healing node clusters that counter NFT minting DDoS attacks in <5ms
Embed on-chain circuit breakers to halt exploits before they drain $CORE liquidity
Turn Discord FUD storms into infra stress metrics via custom LLM pipelines
You’re a Fit If:
You’ve slashed gas costs by 30%+ in past DeFi/GameFi projects (prove it)
Your idea of “monitoring” includes MEV bot behavior and DAO vote latency
You’ve built systems where “chaos testing” means simulating chain splits during PvP wars
You see player rage-quits as a critical infrastructure metric
Compensation:
Base + % of rescued gas fees (paid in $CORE)
NFT “Backbone” Pass (permanent % of protocol revenue)
DAO voting power scaled to uptime milestones (*99.99% SLA = veto rights*)
Payment in Crypto
Velora
3D Motion Designer
Dubai, United Arab Emirates
Dubai, United Arab Emirates
Full time
Remote
Vision At Legends of Velora, we don’t just build games—we forge living, player-owned realities. As a 3D Motion Designer, you won’t just animate assets—you’ll define the kinetic soul of a cross-chain MMO where every movement, transition, and effect feeds into a thriving player-driven economy. Your work will be the visual pulse of a decentralized world, seen by thousands of players across OpenSea, Blur, and beyond.
Your Mission
Craft immersive animations that make blockchain interactions feel alive—trading, battling, and exploring across Chain Worlds
Design motion systems where NFT assets evolve based on ownership history, market value, and in-game achievements
Develop real-time procedural effects tied to on-chain data (gas fees, liquidity pools, DAO votes)
Collaborate with WebGL engineers to push Three.js to its limits, ensuring buttery performance across browsers and devices
Own the full motion pipeline—from concept to implementation—with zero corporate bureaucracy
What You Bring
A portfolio showcasing real-time 3D animations (games, interactive experiences, or Web3 projects)
Mastery of After Effects, Blender, or Maya + experience with game engines (Unity/Unreal) or WebGL frameworks
A haсker mindset—ability to prototype motion systems that react to live blockchain data
Obsession with player psychology—you know how subtle motion cues influence trading behavior
Bonus: Any experience with NFT animation, generative art, or on-chain asset pipelines
Why This Isn’t Just Another Job
Your animations become economic events—rare NFT effects can spike trading volume
No "revisions for the CEO’s nephew"—creative freedom backed by a DAO
Revenue share in $CORE + NFT royalties for signature effects
Build the standard for Web3 motion design—your work will be copied across chains
The Velora Edge
A custom WebGL engine built for zero-lag, cross-chain gameplay
37,000+ early adopters waiting to experience your creations
No App Store gatekeepers—your art reaches players directly, censorship-free
Your Mission
Craft immersive animations that make blockchain interactions feel alive—trading, battling, and exploring across Chain Worlds
Design motion systems where NFT assets evolve based on ownership history, market value, and in-game achievements
Develop real-time procedural effects tied to on-chain data (gas fees, liquidity pools, DAO votes)
Collaborate with WebGL engineers to push Three.js to its limits, ensuring buttery performance across browsers and devices
Own the full motion pipeline—from concept to implementation—with zero corporate bureaucracy
What You Bring
A portfolio showcasing real-time 3D animations (games, interactive experiences, or Web3 projects)
Mastery of After Effects, Blender, or Maya + experience with game engines (Unity/Unreal) or WebGL frameworks
A haсker mindset—ability to prototype motion systems that react to live blockchain data
Obsession with player psychology—you know how subtle motion cues influence trading behavior
Bonus: Any experience with NFT animation, generative art, or on-chain asset pipelines
Why This Isn’t Just Another Job
Your animations become economic events—rare NFT effects can spike trading volume
No "revisions for the CEO’s nephew"—creative freedom backed by a DAO
Revenue share in $CORE + NFT royalties for signature effects
Build the standard for Web3 motion design—your work will be copied across chains
The Velora Edge
A custom WebGL engine built for zero-lag, cross-chain gameplay
37,000+ early adopters waiting to experience your creations
No App Store gatekeepers—your art reaches players directly, censorship-free
Payment in Crypto
Velora
Game Tester – Shape the Future of Web3 Gaming
Dubai, United Arab Emirates
Dubai, United Arab Emirates
Full time
Remote
Vision At Legends of Velora, we’re not just testing bugs—we’re stress-testing the boundaries of player-owned economies. As a Game Tester, you won’t just report glitches—you’ll safeguard a living, breathing multichain universe where every exploit found is a crisis averted for thousands of players and millions in digital assets.Your MissionHunt down bugs like a PvP rogue—except your targets are broken quests, unbalanced economies, and blockchain sync failuresStress-test player-driven systems—from NFT breeding mechanics to cross-chain arbitrage—before they go liveDocument exploits with forensic detail, then help design permanent fixes (not just quick patches)Play daily like a hardcore degenerate—but with a spreadsheet in hand tracking every edge caseBecome the voice of sanity—challenge designers when "innovative" ideas would wreck the in-game economyWhat You BringA ruthless eye for detail—you spot UI misalignments that others ignoreDeep gaming experience—especially in MMOs, strategy games, or play-to-earn titlesBasic understanding of blockchain transactions (gas fees, wallet interactions, etc.)Data-driven mindset—you don’t just say "this feels wrong," you prove it with numbersPassion for breaking things—then explaining exactly how to rebuild them strongerWhy This Isn’t Just Another QA JobYou protect real money—glitches here can tank NFT values or disrupt six-figure marketsDirect access to devs—no "ticket black holes," your reports trigger immediate actionEarly access to alpha builds—test unreleased Chain Worlds before players even know they existProfit from your finds—major bug discoveries earn bonuses in $COREThe Velora EdgeA custom engine with 10x more moving parts than typical Web3 gamesNo corporate red tape—if you find a critical bug at 3 AM, you can wake up the lead devYour work directly impacts OpenSea listings, DAO votes, and live economic events
Payment in Crypto