{"id":2495687,"url":"https://alion.io/job/mantra-chain-senior-solidity-developer","title":"Senior Solidity Developer","company":{"id":1781443,"name":"MANTRA Chain","domain":"mantrachain.io","url":"https://alion.io/company/mantrachain","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"BambooHR","truth_index":{"grade":"B","score":75,"open_postings":5,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Web3","role_family":"Web3","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"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":"Arbitrum","optional":false},{"name":"CI/CD","optional":false},{"name":"DeFi","optional":false},{"name":"Ethers.js","optional":false},{"name":"Foundry","optional":false},{"name":"Git","optional":false},{"name":"Hardhat","optional":false},{"name":"Layer 2","optional":false},{"name":"Optimism","optional":false},{"name":"Polygon","optional":false},{"name":"Smart Contracts","optional":false},{"name":"Solidity","optional":false},{"name":"Tokenomics","optional":false},{"name":"Web3.js","optional":false},{"name":"Ethereum","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2025-09-10T00:00:00Z","employer_posted_date":"2025-09-10","last_verified_at":"2026-10-16T19:55:27Z","board_verified":true,"closed_at":null,"days_open":401,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":401},"description":"Senior Solidity Developer\nAbout MANTRA\nMANTRA has disrupted the status quo since 2020. As pioneers in the Web3\nrevolution, we've spent years building game changing decentralized protocols\nfocused on empowering communities and democratizing finance.\nOur journey began by fuelling grassroots DeFi activism. But we recognized the need\nto scale impact, bridging the divide between permissionless protocols and\nregulated systems. So we transformed, developing a first of its kind regulated DEX\nthat's rewiring finance on a sovereign blockchain built from the ground up.\nNow as this industry matures, MANTRA aims to connect TradFi with a new,\nblockchain native future. We're rebuilding finance through relentless product\ninnovation.\nThe Role\nWe are looking for a highly skilled Senior Solidity Developer to join our growing team\nand take a leading role in building the next generation of decentralized applications\nand blockchain infrastructure. In this role, you will drive the design, development,\nand deployment of secure, scalable, and innovative smart contracts that power our\necosystem.\nAs a senior member of the team, you will be hands-on in architecting complex\nblockchain solutions, setting technical direction, and ensuring best practices for\nsecurity and performance. You’ll collaborate closely with product managers,\nengineers, and stakeholders to transform ambitious ideas into production-ready\ncode that can support millions of users.\nKey Responsibilities\n- Design, develop, and deploy production-ready smart contracts using Solidity\n- Conduct thorough security audits and implement best practices for smart contract security\n- Optimize gas efficiency and contract performance\n- Integrate smart contracts with frontend applications and oracles etc\n- Lead code reviews and establish development standards\n- Mentor junior developers and provide technical guidance\n- Collaborate with cross-functional teams including product managers and designers\n- Stay current with evolving blockchain technologies and DeFi protocols\nWhat We’re Looking For\n- 5+ years of professional Solidity development experience\n- Deep understanding of EVM internals and fundamentals\n- Extensive experience with smart contract frameworks (Hardhat, Truffle, Foundry)\n- Proficiency in Web3.js, Ethers.js, and blockchain integration\n- Strong knowledge of DeFi protocols, tokenomics, and governance mechanisms\n- Experience with smart contract security practices and common vulnerabilities\n- Familiarity with testing frameworks and automated testing strategies\n- Knowledge of Layer 2 solutions (Polygon, Arbitrum, Optimism)\n- Experience with version control (Git) and CI/CD pipelines","description_format":"text","description_chars":2652,"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":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Cryptocurrencies","Asset Tokenization"],"lifecycle":[{"event":"open","at":"2026-10-14T04:24:09Z"}],"visa":[],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.187,"p_room":0.28,"age_days":401,"expected_fill_days":24,"reasons":["conf:3","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/mantra-chain-senior-solidity-developer","json_url":"https://alion.io/job/mantra-chain-senior-solidity-developer.json","meta":{"generated_at":"2026-10-16T21:50:25Z","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":3059,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"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":1781443},"rest":"https://alion.io/mcp/rest/get_company?id=1781443"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmantra-chain-senior-solidity-developer"},{"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%2Fmantra-chain-senior-solidity-developer"},{"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%2Fmantra-chain-senior-solidity-developer"},{"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/mantra-chain-senior-solidity-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmantra-chain-senior-solidity-developer"}]}