Senior Client Security Expert
Who We Are
At OKX, we anticipate that technology will shape the future. Our establishment in 2017 marked the beginning of revolutionizing global systems through advanced digital asset exchange, Web3 portal, and blockchain ecosystems. We transform the financial landscape by providing diverse and sophisticated products, solutions, and tools. With a user base exceeding 50 million across 180 countries, OKX enables individuals worldwide to delve into the realm of Web3. Through an array of innovative products and services, coupled with a steadfast dedication to innovation, OKX envisions a financially inclusive world bolstered by blockchain and decentralized finance.
Exemplifying innovation in thinking, working approach, and product development, we also embody social responsibility by actively engaging in public welfare activities. With over 3,000 employees globally, diversity and inclusivity are fundamental to creating lasting industry value. Join us in shaping the future!
About the Opportunity
We are in search of an experienced Client Security Expert to enhance our team. In this role, you will lead the design, development, and enhancement of client threat detection products in Development Security and Environmental Security realms. Playing a pivotal role in the team, you will drive the Security Development Lifecycle strategy, ensuring products' security from design to deployment phases. By collaborating closely with the team, you will analyze underground economy trends, crafting security solutions customized for the mobile environment. This role offers a platform to demonstrate your technical abilities in a challenging, innovative setting, thereby contributing to client security advancements.
What You’ll Be Doing
Engage in formulating and executing the Client Security Development Lifecycle to safeguard products during various phases.
Establish security management processes for client components, perform security testing, including code audits and vulnerability scanning, to guarantee security and stability.
Develop and upkeep client threat detection products such as malicious code detection, behavioral analysis, and vulnerability scanning.
Stay abreast of underground economy trends, continuously enhancing security solutions against emerging threats.
Work closely with the team in product planning, design, and implementation to meet security requirements.
Undertake mobile software engineering tasks, ensuring security and optimizing product performance.
Explore the latest technologies in client security, offer technical support and training to the team.
What We Look For In You
Bachelor's degree or higher in Computer Science, Information Security, or related fields is desired.
Five or more years of relevant experience in client security, with a focus on security product development.
Proficiency in mobile software engineering, reverse engineering techniques, and apt knowledge of mobile security issues.
Sound understanding of the underground economy, expertise in malicious code analysis and behavioral characteristic recognition.
Experience in product development and adept with Security Development Lifecycle and related tools.
Excellent teamwork and communication skills to collaborate effectively on security initiatives.
Eagerness to learn about new technologies and adapt to the ever-evolving security landscape.
Perks & Benefits
Competitive total compensation package
Learning and Development programs with Education subsidy
Team building programs and company events
Wellness and meal allowances
Comprehensive healthcare coverage for employees and dependants
Exciting additional perks to be revealed during the hiring process!
Tech Business Development Partner (Web & Mobile Apps / Web3 Future - 15% Revenue Share)📉
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.
Founding Technical Partners for Oferli – Elite Web & Mobile Development Team🌐
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
Senior Blockchain Engineer - Low-Latency Execution Infrastructure (HyperEVM / Hyperliquid)
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.
Blockchain Engineer ‑ Copy-Trade Protocol at Zignaly
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? 💥☠
Earn $300-$1000/week - 50% Comission (crypto offers)
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