L3 Support Engineer
Barcelona, Spain
Full time
Office
Compensation is not specified
Role
QA Engineer
Description
About Keyfactor
Our goal is to establish a connected society based on trust, with a focus on identity-first security for both machines and humans. Keyfactor is a trusted partner for over 1,500 global companies, dedicated to enabling digital trust at scale. Recognized as a Best Place to Work, our incredible team drives our culture of growth.
Location: Spain; Barcelona
Experience Level: Mid-level
Job Function: Engineering
Employment Type: Full-Time
Industry: Computer & Network Security
Summary
The role of L3 Support Engineer is crucial for ensuring high customer satisfaction levels. This position requires a blend of strong technical expertise and the ability to navigate complex customer situations efficiently. Key objectives include:
- In-depth understanding of Keyfactor product architecture
- Familiarity with Public Key Infrastructure and certificate management in relation to Keyfactor offerings
- Promote collaboration within the software support and development teams
This role is predominantly based in our Barcelona office, offering a hybrid work model and flexible practices. Applicants must possess valid Right to Work authorization in Spain.
Responsibilities
- Collaborate with support and engineering teams to troubleshoot and resolve intricate software issues.
- Effectively manage and prioritize the L3 support queue.
- Engage in customer meetings to diagnose and rectify software-related concerns.
- Replicate complex customer environments to identify and troubleshoot issues. Proficient in Windows and Linux OS with the ability to extract pertinent information.
- Analyze source code, internal structure, and customer scenarios to pinpoint root causes and aid in issue resolution. Capable of debugging and coding in .NET languages.
- Document issues and contribute to internal documentation.
- Address performance issues along different data paths in various environments.
- Offer technical expertise in testing, deploying, and upgrading Redtrust software applications
- Contribute to new product development, customer training, and other support-related activities
- Available to be part of the 24/7 support service rotation
Minimum Qualifications and Skills
- Extensive experience in enterprise software
- Proficiency in .NET programming environments
- Working knowledge of both Cloud-based and On-premises setups
- Advanced skills in Windows and network protocols (TCP/IP)
- Strong analytical and problem-solving capabilities
- Excellent technical acumen with exceptional problem-solving abilities and multitasking skills
- Customer-centric approach with commitment to high availability
- Familiarity with communication protocols, software APIs, Active Directory, and PowerShell scripting
- Preferably acquainted with both Linux and Mac environments
- Strong grasp of Public Key Infrastructure (PKI) principles
- Background in IT/SW Engineering/Computer Science or related fields is advantageous
Compensation
Salary will be based on experience.
Culture, Career Opportunities, and Benefits
We foster a culture of continuous improvement, providing daily challenges and avenues for personal and professional growth. Balancing autonomy with structure, we create an entrepreneurial environment promoting creativity and innovation. Some initiatives that define our culture include:
- Dedicated days off on Second Fridays every month
- Comprehensive benefits for you and your dependents, covered by the company (US)
- Generous paid parental leave (US)
- Employee-focused ambassadors through Key Contributors & Culture Committees
- Commitment to diversity, equity, inclusion, and belonging, supported by the Keyfactor Alliance Program
- Various well-being resources, wellness allowance, and mindfulness app memberships
- Global Volunteer Day, nonprofit matching, and volunteer days off
- Unlimited time off (US) and competitive leave policies globally
- Regular talent development and cross-functional meetings for professional growth
- Scheduled All-Hands meetings followed by team gatherings
Core Values
Our core values shape our business operations and guide our team members:
- Trust: Upholding transparency and trust in our interactions and partnerships
- Customers: Prioritizing customer interests and security as our key focus
- Innovation: Committing to staying ahead of the innovation curve
- Agility: Thriving in dynamic environments and adapting to change
- Respect: Emphasizing respect, diversity, inclusivity, and empathy
- Teamwork: Achieving common goals through cohesive collaboration
Keyfactor is a proud equal opportunity employer, including veterans and individuals with disabilities.
REASONABLE ACCOMMODATION: Applicants with disabilities seeking accommodations can contact Keyfactor’s People team to arrange the same.
Skills Required
Keyfactor
Website
www.keyfactor.comCompany size
Not specified
Location
United States
Description
Not specified
Adrian Cole
Project Manager — Web3 / SaaS
Remote, USA
Remote, USA
Full time
Remote
About WalletFunnel
WalletFunnel is a Web3 analytics and attribution platform built to help crypto projects understand which marketing channels, campaigns, and influencers actually generate valuable on-chain users.
We connect marketing activity with wallet actions such as wallet connections, deposits, transactions, volume, revenue, and ROI.
About the Role
We are looking for a proactive Project Manager to join WalletFunnel and help coordinate product development, marketing, operations, and communication between team members.
You will work closely with developers, designers, marketing specialists, and management to keep projects organized, deadlines clear, and execution moving forward.
Responsibilities
• Plan and manage projects from idea to launch
• Create tasks, milestones, priorities, and deadlines
• Coordinate developers, designers, marketing, and other team members
• Track progress and identify blockers before they become problems
• Organize workflows using project management tools
• Help improve internal processes and team communication
• Prepare clear project updates and reports
• Make sure deliverables meet requirements and deadlines
• Participate in product planning and feature prioritization
• Help coordinate external contractors and partners when required
Requirements
• 1–3+ years of experience in project management, operations, or a similar role
• Strong organizational and communication skills
• Experience working with remote teams
• Ability to manage multiple tasks and priorities simultaneously
• Understanding of Agile workflows and task management
• Comfortable working with developers and technical teams
• Strong written English
• Independent, proactive, and able to take ownership
Nice to Have
• Previous experience in Web3, crypto, SaaS, fintech, or analytics products
• Basic understanding of blockchain, wallets, DeFi, or crypto marketing
• Experience with startup environments
• Experience working with distributed international teams
What We Offer
• Fully remote position
• Flexible working environment
• Opportunity to work on an early-stage Web3 product
• Direct communication with the founding team
• Opportunity to influence product development and internal processes
• Competitive compensation based on experience
We are looking for someone who does more than simply track tasks. We want a Project Manager who can take ownership, communicate clearly, identify problems early, and help the team move faster.
If this sounds like you, apply with a short introduction about your experience and tell us about one project you managed from planning through delivery
WalletFunnel is a Web3 analytics and attribution platform built to help crypto projects understand which marketing channels, campaigns, and influencers actually generate valuable on-chain users.
We connect marketing activity with wallet actions such as wallet connections, deposits, transactions, volume, revenue, and ROI.
About the Role
We are looking for a proactive Project Manager to join WalletFunnel and help coordinate product development, marketing, operations, and communication between team members.
You will work closely with developers, designers, marketing specialists, and management to keep projects organized, deadlines clear, and execution moving forward.
Responsibilities
• Plan and manage projects from idea to launch
• Create tasks, milestones, priorities, and deadlines
• Coordinate developers, designers, marketing, and other team members
• Track progress and identify blockers before they become problems
• Organize workflows using project management tools
• Help improve internal processes and team communication
• Prepare clear project updates and reports
• Make sure deliverables meet requirements and deadlines
• Participate in product planning and feature prioritization
• Help coordinate external contractors and partners when required
Requirements
• 1–3+ years of experience in project management, operations, or a similar role
• Strong organizational and communication skills
• Experience working with remote teams
• Ability to manage multiple tasks and priorities simultaneously
• Understanding of Agile workflows and task management
• Comfortable working with developers and technical teams
• Strong written English
• Independent, proactive, and able to take ownership
Nice to Have
• Previous experience in Web3, crypto, SaaS, fintech, or analytics products
• Basic understanding of blockchain, wallets, DeFi, or crypto marketing
• Experience with startup environments
• Experience working with distributed international teams
What We Offer
• Fully remote position
• Flexible working environment
• Opportunity to work on an early-stage Web3 product
• Direct communication with the founding team
• Opportunity to influence product development and internal processes
• Competitive compensation based on experience
We are looking for someone who does more than simply track tasks. We want a Project Manager who can take ownership, communicate clearly, identify problems early, and help the team move faster.
If this sounds like you, apply with a short introduction about your experience and tell us about one project you managed from planning through delivery
Payment in Crypto
SADR B
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
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
Marcus Lindberg
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
Zignaly
Blockchain Engineer ‑ Copy-Trade Protocol at Zignaly
Singapore
Singapore
Full time
Remote
Mission:Emit immutable trade clones at the speed of mempools. Engineer on-chain vault + relay contracts that ingest master signals, laser-bridge them across EVM chains, and absorb slippage, MEV, and NFL Sunday-level volatility without exposing followers to liquidation contagion.
Stack & Level Requirements
Solidity 0.8.25+ via Foundry toolchain (Forge, Anvil, Cast) or Rust/Anchor on Solana
Proficiency: Huff / Yul inlines for gas micro-optimisations, EIP-712 signing, EIP-1167 minimal proxies
Cross-layer bridges: LayerZero, Wormhole, CCIP + custom relayers for <2 s finality
MEV-Geth style searchers – understand sandwich mechanics to architect commit-reveal patterned entry pools
Price oracles: Chainlink CCIP-read, Pyth, custom tick-level fallback for sub-$0.05 deviation error in volatility freak events
Security toolkit: Slither, Mythril, Echidna fuzz 1e6 vars/run, invariant bracelets as code
Gas profiling: forge-std Vm for on-chain gas snapshots pre-per-release hook
Hard-Check Trader DNA
⚔️ You have personally executed >$10 k notional on perpetuals & on-chain or cross-margined DeFi strategies with stress traces or Etherscan proof of addr.
⚔️ You’ve felt (or caused) impermanent loss >10 % in a single block.
⚔️ Optional but revered: vault or strategy on DeFiLlama/Apeboard with >$50 k TVL linked to your keys.
Responsibilities
Build gas-constrained e2e testnets atop Anvil mainnet fork for every release candidate.
Continuous white-hat review loop – both formal (Certora specs) & red-team bounty (Immunefi).
Coordinate with backend for off-chain signatures (EIP-712 typedData balancers).
Draft governance & upgrade timelocks (OpenZeppelin UUPS).
Be on-call for on-chain incidents (failed Oracle, stuck bridge, keeper tottering). with protocol parameters YAML files.
Soft Enemies – Don’t apply
ifYou only deployed ERC-20 tokens and never** felt liquidation missiles.
You ignore MEV game theory.
Perks / Weapons Cache
Hardware fund: Apple M Max + 64 GB RAM, 10 Gbps fibre hookup.
Personal copy-trading gas allowance 1 k USD monthly – trade openly on testnet, share P&L in public.
Health stipend for red-eye debugging—includes premium dark-coffee & builder-milk.
Additional 1 % of inflation-scheduled supply upon achieving $100 m copy-AUM on ETH L2.
Apply Now
Attach:
Your latest CV.
Etherscan link to your most brutal trading bot / vault (& TVL proof).
GitHub repo (>20 stars) or archived PR of previous audited live contract address.
Recorded deep-dive Loom of <180 s showing circuit breaker you built.
Cut-over: Applications stack-ranked & closed within 7 calendar days or when 3 offers signed—whichever happens first. Ready to ship settlement layer blood sport? 💥☠
Stack & Level Requirements
Solidity 0.8.25+ via Foundry toolchain (Forge, Anvil, Cast) or Rust/Anchor on Solana
Proficiency: Huff / Yul inlines for gas micro-optimisations, EIP-712 signing, EIP-1167 minimal proxies
Cross-layer bridges: LayerZero, Wormhole, CCIP + custom relayers for <2 s finality
MEV-Geth style searchers – understand sandwich mechanics to architect commit-reveal patterned entry pools
Price oracles: Chainlink CCIP-read, Pyth, custom tick-level fallback for sub-$0.05 deviation error in volatility freak events
Security toolkit: Slither, Mythril, Echidna fuzz 1e6 vars/run, invariant bracelets as code
Gas profiling: forge-std Vm for on-chain gas snapshots pre-per-release hook
Hard-Check Trader DNA
⚔️ You have personally executed >$10 k notional on perpetuals & on-chain or cross-margined DeFi strategies with stress traces or Etherscan proof of addr.
⚔️ You’ve felt (or caused) impermanent loss >10 % in a single block.
⚔️ Optional but revered: vault or strategy on DeFiLlama/Apeboard with >$50 k TVL linked to your keys.
Responsibilities
Build gas-constrained e2e testnets atop Anvil mainnet fork for every release candidate.
Continuous white-hat review loop – both formal (Certora specs) & red-team bounty (Immunefi).
Coordinate with backend for off-chain signatures (EIP-712 typedData balancers).
Draft governance & upgrade timelocks (OpenZeppelin UUPS).
Be on-call for on-chain incidents (failed Oracle, stuck bridge, keeper tottering). with protocol parameters YAML files.
Soft Enemies – Don’t apply
ifYou only deployed ERC-20 tokens and never** felt liquidation missiles.
You ignore MEV game theory.
Perks / Weapons Cache
Hardware fund: Apple M Max + 64 GB RAM, 10 Gbps fibre hookup.
Personal copy-trading gas allowance 1 k USD monthly – trade openly on testnet, share P&L in public.
Health stipend for red-eye debugging—includes premium dark-coffee & builder-milk.
Additional 1 % of inflation-scheduled supply upon achieving $100 m copy-AUM on ETH L2.
Apply Now
Attach:
Your latest CV.
Etherscan link to your most brutal trading bot / vault (& TVL proof).
GitHub repo (>20 stars) or archived PR of previous audited live contract address.
Recorded deep-dive Loom of <180 s showing circuit breaker you built.
Cut-over: Applications stack-ranked & closed within 7 calendar days or when 3 offers signed—whichever happens first. Ready to ship settlement layer blood sport? 💥☠
Payment in Crypto
TA Quant
Frontend Developer
Full time
Remote
Create intuitive, responsive user interfaces that deliver exceptional user experiences across our platform. You'll transform designs into pixel-perfect, performant applications while ensuring smooth interactions and real-time data visualization. We're looking for developers who are passionate about user experience, have an eye for design details, and can build complex web applications that handle large datasets efficiently while maintaining responsive, accessible interfaces across all devices and browsers.
Responsibilities:
Build responsive, performant web applications
Implement designs with attention to UX detail
Integrate with backend APIs and manage application state
Ensure cross-browser compatibility and accessibility
Responsibilities:
Build responsive, performant web applications
Implement designs with attention to UX detail
Integrate with backend APIs and manage application state
Ensure cross-browser compatibility and accessibility
Payment in Crypto