{"id":2446426,"url":"https://alion.io/job/gtsx-senior-defi-trading-systems-engineer","title":"Senior DeFi Trading Systems Engineer","company":{"id":4423086,"name":"GTS","domain":"gtsx.com","url":"https://alion.io/company/gtsx","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"iCIMS","truth_index":null},"role":"Web3","role_family":"Web3","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":225000,"max":275000,"currency":"USD","period":"year","gross":null,"usd_annual":275000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"DeFi","optional":false},{"name":"MEV","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Solidity","optional":false},{"name":"Arbitrum","optional":true},{"name":"JavaScript","optional":true},{"name":"Rust","optional":true},{"name":"TypeScript","optional":true},{"name":"Uniswap","optional":true}],"status":"live","first_seen_at":"2026-10-13T13:39:43Z","employer_posted_date":"2026-10-13","last_verified_at":"2026-10-20T12:46:46Z","board_verified":true,"closed_at":null,"days_open":7,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":7},"description":"Overview\nGTS is seeking a Senior DeFi Trading Systems Engineer to help build and scale our decentralized finance trading infrastructure. In this role, you will work closely with quantitative traders, researchers, and engineers to design, develop, and optimize high-performance trading systems supporting automated market making, liquidity provision, and on-chain execution across decentralized exchanges and protocols. The ideal candidate combines deep C++ engineering expertise with hands-on institutional DeFi experience and a strong understanding of smart contracts, AMM mechanics, and blockchain execution. This is an opportunity to solve complex technical challenges at the intersection of quantitative trading, low-latency systems, and decentralized markets, while directly contributing to the evolution of GTS's trading capabilities.\nResponsibilities\nBuild and extend the firm’s C++ trading infrastructure for DeFi, including automated trading, liquidity provision to AMMs, position management, and rebalancing, in coordination with traders, researchers, and engineers.\nOptimize system performance, build analytics for system reliability, trade reconciliation, transaction cost analysis (TCA), and risk monitoring within the firm’s existing frameworks\nAnalyze on-chain transactions across DEXs, contract behavior, permissions, and execution requirements.\nInvestigate and evaluate new protocols in collaboration with traders, researchers, and engineers.\nQualifications\n3+ years of C++ programming experience in institutional systems.\nPrevious institutional DeFi software-engineering experience, including building production DeFi market-making or other performance-sensitive systems.\nStrong understanding of AMMs, including pricing, liquidity ranges, position behavior, fees, and execution costs.\nHands-on Solidity programming experience, with the ability to read, test, and debug smart contracts and reason about EVM execution, transaction failures, permissions, and upgrade mechanisms.\nUnderstanding of on-chain execution nuances such as transaction ordering and MEV related execution risks.\nExperience working with traders and researchers in translating systematic trading models into production-ready systems.\nPreferred experience:\nExperience with other programming languages commonly used across the DeFi space (Rust, TypeScript/JavaScript, etc…) is a plus\nPrevious experience working with Uniswap v4 and its architecture, including PoolManager, PositionManager, hooks, flash accounting, and liquidity positions.\nExperience with EVM-compatible ecosystems and L2 networks (Arbitrum, X Layer, HyperEVM, etc…).\nExperience supporting market-making, CEX/DEX arbitrage, cross-venue execution, or additional DeFi protocols such as lending, derivatives, and vaults.\nExperience with handling performance-critical RPC or node infrastructure, private transaction submission, bundles, or other chain-specific execution tooling.\nGeneral experience developing smart contracts, participating in security reviews, or building execution-simulation and backtesting infrastructure\nWe're proud to employ leading talent in the industry and work to ensure our employees enjoy a high quality of life.\nPlease note: The use of AI tools during interviews is strictly prohibited, unless explicitly agreed upon.\nIn accordance with New York City's Pay Transparency Law, the base salary range for this role is $225,000 to $275,000. Base salary does not include other forms of compensation or benefits. \nBenefits:\nCore Benefits: Medical, Dental, and Vision coverage with generous employer contribution for employees and dependents. 401k match.\nPerks: Daily Meal Allowance, Equinox Corporate Membership Rate, Snacks, Office Game Room, Casual Dress.\nHybrid Work Policy: 4 Days a Week in office, Fridays can be worked from home.\nAll qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, age, national origin, or protected veteran status, and will not be discriminated against on the basis of disability.\nUnsolicited resumes:\nWe do not accept unsolicited headhunter and agency resumes and will not pay fees to any third-party agency or company that does not have a signed agreement with GTS.","description_format":"text","description_chars":4259,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["401k plan","Hybrid work"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["DeFi"],"lifecycle":[{"event":"open","at":"2026-10-13T13:39:43Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":6,"expected_fill_days":27,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-20T05:45:00Z"},"pay":{"stated_usd_annual":275000,"is_top_pay":true},"html_url":"https://alion.io/job/gtsx-senior-defi-trading-systems-engineer","json_url":"https://alion.io/job/gtsx-senior-defi-trading-systems-engineer.json","meta":{"generated_at":"2026-10-20T14:21:34Z","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":16117,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-21T00:00:00Z"}},"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":4423086},"rest":"https://alion.io/mcp/rest/get_company?id=4423086"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgtsx-senior-defi-trading-systems-engineer"},{"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%2Fgtsx-senior-defi-trading-systems-engineer"},{"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%2Fgtsx-senior-defi-trading-systems-engineer"},{"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/gtsx-senior-defi-trading-systems-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgtsx-senior-defi-trading-systems-engineer"}]}