{"id":1573820,"url":"https://alion.io/job/threema-senior-rust-engineer-80-100","title":"Senior Rust Engineer (80–100%)","company":{"id":454542,"name":"Threema","domain":"threema.com","url":"https://alion.io/company/threema-2","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Schema","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["CH"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":117000,"max_usd":206000,"period":"year","method":"role_seniority_country_cell","sample_n":21},"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Rust","optional":false},{"name":"Linux","optional":true}],"status":"live","first_seen_at":"2026-09-28T19:55:44Z","employer_posted_date":"2026-09-30","last_verified_at":"2026-10-13T22:18:10Z","board_verified":true,"closed_at":null,"days_open":17,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":17},"description":"Threema is the world’s best-selling secure messenger for both private users and businesses. Since 2012, we have been working tirelessly to ensure that our users can communicate freely without worrying about their privacy. Our growing user base includes millions of private customers and thousands of businesses and organizations from all over the world.\nWe are growing and looking for a new team member to join as a\nSenior Rust Engineer Backend (80-100%)\nThe Role\nWe’re looking for a senior engineer to help design and build the core services behind our messaging backend. You will work on the systems that handle message delivery, real-time presence, and end-to-end encryption at scale. Most of our backend is written in Rust, and we’re expanding it further.\nYou will join a small team of engineers who care about correctness, performance, and keeping things simple. Expect to write production code, review other people’s code, and have a say in architecture decisions from day one.\nWhat You Will Do\nDesign and build backend services in Rust that handle high-throughput, low-latency messaging traffic\n\nWork on core infrastructure: message queues, delivery guarantees, connection handling, and storage layers\n\nDebug and optimize systems under real production load, not just in benchmarks\n\nReview code and mentor other engineers on Rust patterns and systems design\n\nTake ownership of a service end to end, from design through deployment and maintenance\n\nWhat We’re Looking For\nMore than ten years of professional software engineering experience, with at least two years writing Rust in production\n\nSolid understanding of concurrency, memory management, and systems programming\n\nExperience with distributed systems: what happens when a network partitions, a node dies, or a queue backs up\n\nComfort working close to the metal when needed, whether that’s networking, storage engines, or protocol design\n\nExperience in working on scalable, low-latency, high-throughput systems\n\nGood communication skills: you will need to explain trade-offs to people who don’t write Rust\n\nA degree in computer science or equivalent experience; we care more about what you’ve shipped than where you studied\n\nNice to Have\nExperience with async Rust (Tokio or similar)\n\nBackground in messaging protocols, telecom, or real-time systems\n\nContributions to open source Rust projects\n\nExperience with encryption or security-critical systems\n\nWhat We Offer\nA young, motivated team with straightforward communication\n\nFlexible working hours, option to work from home up to two days per week\n\nOption to work from anywhere for two weeks per year\n\nOption to take unpaid leave\n\nYou can choose your own hardware (macOS or Linux)\n\nPublic transportation discount or parking space (electric car charging available)\n\nFree use of fitness room, including a fitness trainer once a month\n\nProfessional massage once a month\n\nInternal German or English courses\n\nA great coffee machine ;-)\n\nRegular company events and aperitifs\n\nThe good feeling of contributing to the effective protection of the privacy of millions of people\n\nPlace of work: Pfäffikon SZ (Greater Zurich Area)\nStart date: Immediately or by agreement\nHave we sparked your interest?\nWe believe that diverse teams build better products. We welcome and encourage applications from people of all backgrounds, and perspectives. Your unique experience is an asset, and we’d love to hear from you.\nApplications sent via email cannot be considered. Please use the official “Apply” button below so we don’t accidentally miss your resume in our crowded inboxes.\nFor agencies: we are filling this role directly and do not accept unsolicited candidate profiles.","description_format":"text","description_chars":3669,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Company events","Flexible schedule"],"hiring_locations":[{"name":"Switzerland","iso":"CH","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Exhibitions","Security Compliance"],"lifecycle":[{"event":"open","at":"2026-10-01T09:06:13Z"}],"visa":[],"liveness":{"score":77,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":0.9,"age_days":16,"expected_fill_days":35,"reasons":["conf:31","win:mid"],"computed_at":"2026-10-15T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/threema-senior-rust-engineer-80-100","json_url":"https://alion.io/job/threema-senior-rust-engineer-80-100.json","meta":{"generated_at":"2026-10-15T20:52:39Z","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":31679,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"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":454542},"rest":"https://alion.io/mcp/rest/get_company?id=454542"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fthreema-senior-rust-engineer-80-100"},{"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%2Fthreema-senior-rust-engineer-80-100"},{"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%2Fthreema-senior-rust-engineer-80-100"},{"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/threema-senior-rust-engineer-80-100\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fthreema-senior-rust-engineer-80-100"}]}