Infrastructure QA & Security Engineer
Full time
Remote
Compensation is not specified
Role
QA Engineer
Description
Overview Are you an experienced Infrastructure and DevOps Engineer who is skilled in optimizing performance and technical excellence? We are seeking two individuals to join our team and play a critical role in our development and expansion. As a Senior Infrastructure and DevOps Engineer, you will be responsible for ensuring optimal performance and stability for our Openmesh platform during its next phase of expansion.
About us For the past 3 years, we have been building a decentralized data infrastructure for crypto and Web 3.0, providing access to reliable and immutable data without a middleman. We believe that access to unedited information is a fundamental right in a free and democratic society. Our infrastructure and technology stack are open-source and governed by an open-source community.
Responsibilities
- Ensuring compatibility and effective integration with third-party services through the development of APIs.
- Designing and developing scalable APIs that can handle increasing workloads and evolving user demands.
- Conducting security testing to identify vulnerabilities and implementing robust security measures.
- Collaborating with cross-functional teams to identify performance bottlenecks and optimize API responsiveness.
- Improving the scalability and performance of existing APIs in collaboration with the development team.
- Implementing best practices and coding standards to elevate our APIs to institutional-grade standards.
- Staying current with industry trends and incorporating advancements into our API strategies.
Qualifications
- Bachelor's degree in Computer Science, Software Engineering, or a related field (advanced degree preferred).
- Proven experience in successful API development and architecture.
- Proficiency in various API integration methods and technologies.
- Strong understanding of scalability principles and strategies in API design.
- Familiarity with performance testing tools and methodologies.
- Solid knowledge of security networks and data protection practices.
- Experience with version control systems (e.g., Git) and agile development methodologies.
- Excellent problem-solving skills and ability to troubleshoot complex API-related issues.
- Effective communication skills, both written and verbal, with the ability to collaborate across teams.
About OPEN Data and Infrastructure Day We are hosting OPEN Conference and Hackathon as an annual event to bring together developers, data scientists, entrepreneurs, regulators, and corporations to discuss and educate about the disruptive impact of Web3 compared to traditional internet systems. Our goal is to raise awareness about the need to address the problem of concentrated power over our data and IT technologies. We aim to provide valuable insights into the challenges and opportunities in the next generation of the internet, Web 3.0.
Why is decentralization important and urgent? Trusting centralized systems and handing over control of our future is risky. When someone has access and control over a massive resource, there's a potential for misuse. From the commercial use of our data, we've seen how big Web2 corporations can exploit it. Web 3.0 presents an opportunity and responsibility for us to build better technologies that focus on decentralization and the empowerment of individuals. The OPEN conference is an open platform to challenge ideas and build technologies, infrastructures, and standards across Web3.
Skills Required
Openmesh Network
Website
www.openmesh.networkCompany size
Not specified
Location
United States
Description
Not specified
SADR B
Tech Business Development Partner (Web & Mobile Apps / Web3 Future - 15% Revenue Share)📉
Remote, USA
Remote, USA
Part time
Remote
Hi, I'm Sadr B | CEO,Oferli , the founder behind Oferli. We are an upcoming tech venture officially launching in the first week of August...🌐
About Oferli:
Oferli is an innovative tech venture officially launching in the first week of August. We specialize in delivering high-quality Web and Mobile App Development services, with Web3 integrations and solutions planned for the near future.
As a cutting-edge startup, we give ourselves a unique financial and operational advantage by using cryptocurrency for our project payments, ensuring fast, secure, and borderless transactions. Our core technical team is already fully established and based in the US, and we have a dedicated professional workspace set up to manage our operations smoothly.
We are now looking for a driven, professional, and serious Business Development Partner to join us right from the ground floor and grow with us from day one.
What You Will Do:
Lead our business development, client outreach, and sales strategy for our web and mobile app services.
Handle client calls, meetings, and presentations (fluency in English is required).
Collaborate closely with our US-based technical team to turn client requirements into successful tech projects.
Help position Oferli for our upcoming Web3 expansion.
Build strong, long-term commercial relationships and help scale Oferli from launch onward.
What We Are Looking For:
A serious, professional mindset with a strong passion for tech startups and business growth.
Excellent communication and negotiation skills in English (fluent or native).
Someone ready to commit from the ground up as a true long-term partner, not just a short-term contractor.
Familiarity with crypto payments and the Web3 space is a strong plus.
Compensation Structure:
This is a foundational partnership role. You will earn a 15% revenue share on every project that comes into the company. As we grow together, you grow with us.
How to Apply:
If you are ready to launch something big with us this August, send us a brief message detailing your background, why you want to join Oferli, and how you plan to drive our business development.
About Oferli:
Oferli is an innovative tech venture officially launching in the first week of August. We specialize in delivering high-quality Web and Mobile App Development services, with Web3 integrations and solutions planned for the near future.
As a cutting-edge startup, we give ourselves a unique financial and operational advantage by using cryptocurrency for our project payments, ensuring fast, secure, and borderless transactions. Our core technical team is already fully established and based in the US, and we have a dedicated professional workspace set up to manage our operations smoothly.
We are now looking for a driven, professional, and serious Business Development Partner to join us right from the ground floor and grow with us from day one.
What You Will Do:
Lead our business development, client outreach, and sales strategy for our web and mobile app services.
Handle client calls, meetings, and presentations (fluency in English is required).
Collaborate closely with our US-based technical team to turn client requirements into successful tech projects.
Help position Oferli for our upcoming Web3 expansion.
Build strong, long-term commercial relationships and help scale Oferli from launch onward.
What We Are Looking For:
A serious, professional mindset with a strong passion for tech startups and business growth.
Excellent communication and negotiation skills in English (fluent or native).
Someone ready to commit from the ground up as a true long-term partner, not just a short-term contractor.
Familiarity with crypto payments and the Web3 space is a strong plus.
Compensation Structure:
This is a foundational partnership role. You will earn a 15% revenue share on every project that comes into the company. As we grow together, you grow with us.
How to Apply:
If you are ready to launch something big with us this August, send us a brief message detailing your background, why you want to join Oferli, and how you plan to drive our business development.
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
futur pulse
Earn $300-$1000/week - 50% Comission (crypto offers)
Part time
Hybrid
I am looking for serious closer/affiliate to sell a proven digital product
Offers :
product price :$97
Your cut : 50% ( $48 per sale )
Paid same day in USDT after proof of sale
Why this converts: Beginner friendly "make money" angle
Clear outcom: generate 150+ USDT in 24h
no subcription/no API cost
Ready- to use- landing page
Your role:
Promote your link
Close deals ( Dms,network,clients)
Product : lead generation tool ( Google maps ) packaged as a "cash systeme" already tested strong-demand
Number close
5 sales/day = $240 day no cap
Looking for motivated sellers only .
Send "Ready" to get started
Offers :
product price :$97
Your cut : 50% ( $48 per sale )
Paid same day in USDT after proof of sale
Why this converts: Beginner friendly "make money" angle
Clear outcom: generate 150+ USDT in 24h
no subcription/no API cost
Ready- to use- landing page
Your role:
Promote your link
Close deals ( Dms,network,clients)
Product : lead generation tool ( Google maps ) packaged as a "cash systeme" already tested strong-demand
Number close
5 sales/day = $240 day no cap
Looking for motivated sellers only .
Send "Ready" to get started
Payment in Crypto