{"id":3836921,"url":"https://alion.io/job/techchain-talent-software-engineer-rollup","title":"Software Engineer (Rollup)","company":{"id":4476923,"name":"TechChain Talent","domain":"techchaintalent.xyz","url":"https://alion.io/company/tech-chain-talent","size_band":"11-50","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Schema","truth_index":{"grade":"A","score":90,"open_postings":10,"ghost_share":0,"stale_share":0.4,"repost_share":0,"time_to_fill_p50_days":56,"computed_at":"2026-11-07T05:47:08Z"}},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":200000,"max":250000,"currency":"USD","period":"year","gross":null,"usd_annual":250000},"salary_estimate":null,"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Arbitrum","optional":false},{"name":"Ethereum","optional":false},{"name":"Foundry","optional":false},{"name":"Layer 2","optional":false},{"name":"Optimism","optional":false},{"name":"Rollup","optional":false},{"name":"Rollup","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Taiko","optional":false},{"name":"Agile","optional":true},{"name":"JavaScript","optional":true},{"name":"Solidity","optional":true},{"name":"Staking","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-11-03T12:54:03Z","employer_posted_date":"2026-11-03","last_verified_at":"2026-11-07T08:15:07Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"Software Engineer (Rollup)\nLocation: US or Europe\nSalary: $200K - $250K\nAbout the company Our client is building decentralised infrastructure for the Ethereum ecosystem. Their flagship liquid restaking protocol is designed to lower barriers for at-home stakers and counter centralisation risks from existing staking pools. They are also building an Ethereum based rollup that enables credibly neutral transaction sequencing and ensures value flows back to Ethereum’s L1 validators.\nThey are backed by leading crypto VCs, major exchanges and global financial institutions, and are expanding the team with people ready to shape the future of Ethereum’s infrastructure. The role We’re looking for an ambitious Senior Blockchain Engineer and Researcher to play a key role in advancing the company’s Ethereum Layer 2 rollup.\nYour primary focus will be designing and developing smart contracts and execution machines. You’ll build smart contract solutions that aggregate and optimise transaction batches, and re-architect existing rollup solutions to become based. These contracts will power decentralised sequencing and validator reward mechanisms, contributing to a sustainable rollup ecosystem.\nRequirements 4+ years of professional blockchain development experience Extensive experience architecting blockchains and rollups Hands-on experience with Layer 2 solutions such as Arbitrum, Optimism, Taiko or other rollup architectures, with a solid understanding of decentralised sequencing and the Ethereum L2 ecosystem Experience developing secure smart contracts, with a focus on unit and fuzz testing using Foundry Extensive experience with deployment and security best practices Personal attributes Research-oriented mindset with the grit to deliver an exceptional product Open to feedback without ego and hungry to explore new ideas Independent problem solver with a strong sense of ownership, plus solid communication and team skills Nice to have TypeScript and backend development Experience working in a scrum or agile setup","description_format":"text","description_chars":2027,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cryptocurrencies","Financial Services"],"lifecycle":[{"event":"open","at":"2026-11-05T21:20:23Z"}],"visa":[],"liveness":{"score":54,"band":"ok","label":"Likely open","p_open":1,"p_active":0.542,"p_room":1,"age_days":3,"expected_fill_days":56,"reasons":["conf:11","agency","velocity","win:early"],"computed_at":"2026-11-07T05:47:08Z"},"pay":{"stated_usd_annual":250000,"is_top_pay":true},"html_url":"https://alion.io/job/techchain-talent-software-engineer-rollup","json_url":"https://alion.io/job/techchain-talent-software-engineer-rollup.json","meta":{"generated_at":"2026-11-07T08:52:19Z","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":6019,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-08T00:00:00Z"}},"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":4476923},"rest":"https://alion.io/mcp/rest/get_company?id=4476923"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftechchain-talent-software-engineer-rollup"},{"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%2Ftechchain-talent-software-engineer-rollup"},{"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%2Ftechchain-talent-software-engineer-rollup"},{"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/techchain-talent-software-engineer-rollup\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftechchain-talent-software-engineer-rollup"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3836921}},{"tool":"search_jobs","arguments":{"company":"techchaintalent.xyz","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3836921},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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