{"id":4019620,"url":"https://alion.io/job/rootstocklabs-senior-protocol-engineer","title":"Senior Protocol Engineer","company":{"id":686417,"name":"RootstockLabs","domain":"rootstocklabs.com","url":"https://alion.io/company/rootstocklabs","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Web3","role_family":"Web3","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"unspecified","remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Bitcoin","optional":false},{"name":"Java","optional":false},{"name":"Rollup","optional":false},{"name":"Rollup","optional":false},{"name":"Rust","optional":false},{"name":"Docker","optional":true},{"name":"Ethereum","optional":true},{"name":"Grafana","optional":true},{"name":"JavaScript","optional":true},{"name":"Prometheus","optional":true},{"name":"Solidity","optional":true}],"status":"live","first_seen_at":"2026-11-10T13:05:08Z","employer_posted_date":"2026-11-10","last_verified_at":"2026-11-11T10:03:49Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"ABOUT THE ROLE\nWe are looking for a Senior Protocol Engineer to join our Rollup team. This is a hands-on, full-time engineering role focused on building and scaling our Bitcoin-secured Layer 2 rollup on Rootstock. This is a protocol role: you’ll work directly on the chain on topics such as sequencing, block derivation, consensus and finality, bridge and proof system. You will join a small team of senior engineers with high ownership. You will design, build, test and operate core components, and you will take part in the technical decisions of the project.\nKEY RESPONSIBILITIES\nDesign, build and maintain core protocol components: execution and consensus clients, sequencer, block derivation and batch submission to the parent chain.\nWork on the bridge and the proof system: deposits, withdrawals, cross-layer messages and state validation.\nMaintain a large open source codebase: learn how its parts work together, make changes that are safe for a live network, and keep the code easy to evolve.\nReview code, write design docs and RFCs, and take part in architecture decisions.\nTest and debug a distributed system: unit to adversarial tests, local devnets, reorgs, node desync and performance problems.\nDeliver and operate releases on public chains: upgrades, hard forks, monitoring and incidents, etc.\nCollaborate with Product, DevOps and Security to plan and ship each release.\nWHAT YOU BRING\nMust have\n5+ years of professional software engineering, with at least 2 years in blockchain core or protocol development (node clients, consensus, etc.).\nSolid production experience in mainstream languages (for example Go, Rust or Java).\nDeep knowledge of blockchain internals and the EVM: consensus, P2P networking, state and storage, transaction lifecycle, JSON-RPC, etc.\nExperience working effectively in large codebases you did not write.\nAI-assisted development is a core part of your work, while owning what you deliver.\nAutonomy and ownership: you help define the work, not only execute assigned tasks.\nGood English, spoken and written, since the team is international and remote.\nNice to have\nProfessional experience with Go and/or Rust.\nHands-on experience with Ethereum Layer 2 rollups (optimistic or ZK).\nUnderstanding of rollup design: sequencing, data availability, derivation, finality, etc.\nContributions to open source blockchain clients or rollup stacks.\nExperience with fault proof systems or validity proofs.\nKnowledge of Bitcoin and EVM compatible chains.\nExperience with Docker, cloud providers, Prometheus and Grafana.\nAble to read and review Solidity (bridge and system contracts).\nROOTIES BENEFITS\nAt RootstockLabs, we don’t just offer a job, we offer a community. Here’s what you can expect when you join us:\nCompetitive compensation package and unique benefits designed to support your growth and well-being.\n100% Remote Work from Europe & Latin America, with access to global CoWorking spaces.\nWork-Life Balance: Paid vacation and sick leave days\nContinuous Learning: Access to training programs, language courses, and learning sponsorship annually.\nUnique Projects: Work with cutting-edge blockchain technology in a global, diverse team.\nABOUT ROOTSTOCKLABS \nRootstockLabs is a key contributor to Rootstock, Bitcoin's Financial Infrastructure for lending, yield, and onchain capital markets. We build and commercialize the institutional infrastructure that turns Bitcoin into productive capital.\nWhat we do: Develop and commercialize Bitcoin-backed lending, tokenized real-world assets, and onchain financial strategies\nWho we work with: Leading custodians, asset managers, and financial institutions\n Why it matters: Rootstock is secured by 80%+ of Bitcoin's hash power and has run with 100% uptime since 2018 (bringing Ethereum-style programmability to the world's hardest money).\n Proof it works: 200+ dApps live on Rootstock, from BTCFi protocols like Sushiswap and Oku to institutional names like Mercado Bitcoin, Animoca Brands, and Paystand","description_format":"text","description_chars":3976,"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":[{"language":"English","level":"All levels","optional":false}]},"benefits":["Continuous learning"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Financial Services","Cryptocurrencies","Blockchain Infrastructure"],"lifecycle":[{"event":"open","at":"2026-11-10T14:30:40Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":35,"reasons":["conf:0","win:early"],"computed_at":"2026-11-11T05:49:22Z"},"pay":null,"html_url":"https://alion.io/job/rootstocklabs-senior-protocol-engineer","json_url":"https://alion.io/job/rootstocklabs-senior-protocol-engineer.json","meta":{"generated_at":"2026-11-11T11:16:07Z","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":19576,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":686417},"rest":"https://alion.io/mcp/rest/get_company?id=686417"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Frootstocklabs-senior-protocol-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Frootstocklabs-senior-protocol-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Frootstocklabs-senior-protocol-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/rootstocklabs-senior-protocol-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frootstocklabs-senior-protocol-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4019620}},{"tool":"search_jobs","arguments":{"company":"rootstocklabs.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4019620},"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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