{"id":2738878,"url":"https://alion.io/job/okx-senior-staff-engineer-dex-trading-system","title":"Senior / Staff Engineer, DEX Trading System","company":{"id":76,"name":"OKX","domain":"okx.com","url":"https://alion.io/company/okx","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":89,"open_postings":313,"ghost_share":0.102,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":91,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Singapore"],"countries":["SG"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"DeFi","optional":false},{"name":"Java","optional":false},{"name":"Smart Contracts","optional":false}],"status":"live","first_seen_at":"2026-10-16T15:49:05Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-25T21:45:25Z","board_verified":true,"closed_at":null,"days_open":9,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":8},"description":"OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa\nWho We Are\nAt OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom.\nOKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves.\nAcross our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.\nAbout the Opportunity\nWe are looking for a seasoned backend engineer to design, build, and scale the backend systems powering OKX’s DEX trading products.You will own critical parts of the trading lifecycle-from quote discovery and order management to transaction submission, execution tracking, and reconciliation. Working closely with product, frontend, smart contract, and infrastructure teams, you will deliver secure, reliable trading experiences across multiple blockchain ecosystems.This is a hands-on engineering role with meaningful architectural ownership and opportunities to grow into technical leadership.\nWhat You’ll Be Doing \nDesign and develop backend services for quote aggregation, order management, transaction orchestration, and execution tracking.\n\nBuild reliable integrations with DEX protocols, liquidity sources, blockchain RPC providers, and indexing services.Define clear order and transaction state models, with robust handling of retries, duplicate requests, partial failures, and recovery.\n\nEnsure trading services remain reliable under high concurrency, traffic spikes, and degraded external dependencies.\n\nImplement appropriate rate limiting, concurrency controls, resource isolation, and graceful degradation.\n\nOptimize database access, transaction boundaries, caching, and asynchronous processing.Establish monitoring, alerting, load testing, and incident-response practices for critical trading flows.\n\n Support trading workflows across multiple blockchain ecosystems.Handle transaction submission, confirmation tracking, failed or dropped transactions, and chain reorganizations.\n\nBuild data synchronization and reconciliation mechanisms to maintain consistency between backend records and on-chain execution.\n\nTranslate product requirements into practical technical designs and production-ready services.\n\nOwn features through implementation, testing, rollout, and post-launch operation. \n\nWhat We Look For In You\n5+ years of professional backend engineering experience, including ownership of production systems.\n\nStrong proficiency in Java and its backend ecosystem.Solid understanding of concurrency, distributed systems, relational databases, caching, and messaging systems. \n\nExperience building high-availability services and diagnosing performance or reliability issues in production. \n\n Understanding of blockchain transactions, smart contract interactions, and common DeFi trading mechanisms.\n\nAbility to independently drive a feature from technical design through production deployment.Strong ownership, sound engineering judgment, and effective cross-functional communication. \n\nPerks &Benefits\nCompetitive total compensation package\n\nL&D programs and Education subsidy for employees' growth and development\n\nVarious team building programs and company events\n\nWellness and meal allowances \n\nComprehensive healthcare schemes for employees and dependants \n\nMore that we love to tell you along the process!\n\nNotice:\nAll official OKXvacancies are published on this website.While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated. If in doubt, please apply directly through our official careers website.\nInformation collected and processed as part of the recruitment process of any job application you choose to submit is subject to OKX's Candidate Privacy Notice.","description_format":"text","description_chars":4373,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Company events"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["DeFi","Crypto Exchanges","Cryptocurrencies","Crypto Wallets"],"lifecycle":[{"event":"open","at":"2026-10-16T20:01:59Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":8,"expected_fill_days":91,"reasons":["conf:3","velocity","win:early","comp:brand"],"computed_at":"2026-10-25T05:49:26Z"},"pay":null,"html_url":"https://alion.io/job/okx-senior-staff-engineer-dex-trading-system","json_url":"https://alion.io/job/okx-senior-staff-engineer-dex-trading-system.json","meta":{"generated_at":"2026-10-26T01:14:13Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":1669,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":76},"rest":"https://alion.io/mcp/rest/get_company?id=76"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fokx-senior-staff-engineer-dex-trading-system"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fokx-senior-staff-engineer-dex-trading-system"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fokx-senior-staff-engineer-dex-trading-system"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/okx-senior-staff-engineer-dex-trading-system\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fokx-senior-staff-engineer-dex-trading-system"}]}