{"id":2239323,"url":"https://alion.io/job/bitcoin-suisse-senior-custody-developer","title":"Senior Custody Developer","company":{"id":54274,"name":"Bitcoin Suisse","domain":"bitcoinsuisse.com","url":"https://alion.io/company/bitcoin-suisse","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"onlyfy","truth_index":null},"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":"structured","locations":["Bratislava, Slovakia"],"countries":["SK"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":48000,"max_usd":81000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":21},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Agile","optional":false},{"name":"Apache Kafka","optional":false},{"name":"Bitcoin","optional":false},{"name":"Rest API","optional":false},{"name":"Staking","optional":false},{"name":"Azure","optional":true},{"name":"Azure DevOps","optional":true},{"name":"C#","optional":true},{"name":"CI/CD","optional":true},{"name":"Git","optional":true},{"name":"JavaScript","optional":true},{"name":"Jenkins","optional":true},{"name":"React.js","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-09-30T00:00:00Z","employer_posted_date":"2026-09-30","last_verified_at":"2026-10-14T09:23:06Z","board_verified":true,"closed_at":null,"days_open":14,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":14},"description":"Bitcoin Suisse is the Swiss crypto-native pioneer and trusted gateway to crypto asset investing. As the leading crypto financial service provider in Switzerland, we operate across the most relevant crypto exchanges and provide brokerage, custody, staking and other crypto-related services at the forefront of technical innovation. We are as dedicated to our clients as we are passionate about cryptocurrencies and the underlying blockchain technology. We make things happen and have helped to shape the crypto and blockchain ecosystem in Switzerland as a driving force in the development of the ‘Crypto Valley’. Bitcoin Suisse is headquartered in Zug with offices in Copenhagen, Vaduz and Bratislava and targets (ultra-) high-net-worth private individuals and institutional clients.\nSenior Custody Developer\nJoin Our Crypto Custody Team\nAt the heart of Bitcoin Suisse is our Custody division, where we are dedicated to safeguarding digital assets with the highest standards of security and innovation. Our team builds and maintains the Bitcoin Suisse Vault-our proprietary, highly secure custody system-which supports over 20 blockchains and a wide variety of transaction types. In addition to powering our internal operations, the Vault is also used directly by our clients, giving them trusted access to their assets.\nWe also interface with leading third-party custody solutions, integrating external systems with our own to offer clients flexible, best-in-class storage options while maintaining seamless interoperability across the broader crypto ecosystem.\nOur Custody team is responsible for managing all client cryptocurrency deposits and withdrawals. This critical function connects with numerous systems across Bitcoin Suisse-as well as with external partners-using both synchronous communication (e.g., REST APIs) and asynchronous messaging (Kafka) to ensure secure, reliable, and efficient operations.\nIf you're passionate about building secure, scalable systems in the evolving world of digital assets, we'd love to hear from you.\nAbout the Role:\nWe are seeking a highly skilled Senior Developer with a strong background in .Net programming and hands-on experience with different architectural patterns to join our Custody team.\nIn this role, you will be responsible for designing, developing, and maintaining robust and scalable applications to support and enhance our various operational domains. You will be a part of a cross-location development team and work closely together stakeholders in various domains in an event driven and distributed system landscape.\nYou will have the following responsibilities\nLead the development of robust, scalable, and secure enterprise-grade applications \nEnsure code quality through reviews, mentorship, and the establishment of coding standards \nCollaborate with cross-functional teams across multiple locations to deliver innovative solutions \nContribute to the improvement of test automation processes \nWhat you bring along:\nRequired Skills & Qualifications\nStrong background in .NET, and modern software development practices \nAbility to explain complex concepts simply and work collaboratively in a team \nAbility to work collaboratively in a fast-paced, agile environment \nExcellent communication skills in English \nExperience in blockchain, cryptography orhighly secure systems \nPreferred Qualifications\n Familiarity with CI/CD tools (e.g., Azure DevOps, Jenkins) and version control systems (e.g., Git). \nExperience with frontend development in Typescript and React \nExperience with micro services and message driven architecture \nWhat we offer:\nExpertise: Work with crypto native experts\nCulture: Positive and supportive team culture that relies on common goals, ambitions and values \nActivities: Regular team events and activities \nOwnership: High level of autonomy and responsibility \nFitness: Multisport Card\n Location: Office location in the new Bratislava downtown (Jurkovičova tepláreň)\nHome Office\n Workation: Enjoy the flexibility of working across designated EU countries, with up to 20 days a year to combine work and travel","description_format":"text","description_chars":4094,"description_truncated":false,"requirements":{"experience_years_min":null,"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":["Home office"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Cryptocurrencies"],"lifecycle":[{"event":"open","at":"2026-10-11T01:02:48Z"}],"visa":[],"liveness":{"score":71,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.792,"p_room":0.9,"age_days":14,"expected_fill_days":23,"reasons":["conf:2","win:mid"],"computed_at":"2026-10-14T06:34:16Z"},"pay":null,"html_url":"https://alion.io/job/bitcoin-suisse-senior-custody-developer","json_url":"https://alion.io/job/bitcoin-suisse-senior-custody-developer.json","meta":{"generated_at":"2026-10-14T10:28:11Z","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":12218,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-15T00:00:00Z"}},"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":54274},"rest":"https://alion.io/mcp/rest/get_company?id=54274"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fbitcoin-suisse-senior-custody-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%2Fbitcoin-suisse-senior-custody-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%2Fbitcoin-suisse-senior-custody-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/bitcoin-suisse-senior-custody-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fbitcoin-suisse-senior-custody-developer"}]}