{"id":3960470,"url":"https://alion.io/job/vivacom-principal-engineer-oss-infrastructure","title":"Principal Engineer — OSS & Infrastructure","company":{"id":55441,"name":"Vivacom","domain":"vivacom.bg","url":"https://alion.io/company/vivacom","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Sofia, Bulgaria"],"countries":["BG"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Linux","optional":false}],"status":"live","first_seen_at":"2026-11-09T11:03:53Z","employer_posted_date":null,"last_verified_at":"2026-11-09T11:03:53Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"You will design the technology estate, build it, and operate it. This is a hands-on senior individual-contributor position, growing into leadership of a small engineering team.\n\nThe benefits of being part of the team:\n\nCompensation package\n\nAttractive salary based on your performance\n\nMonthly food vouchers – €52\n\nDevice voucher – €312\n\nSIM card with an Unlimited plan\n\nNo cap on bonuses under the “Refer a Friend” program\n\nPreferential conditions for Vivacom services for you and your loved ones\n\n Work–Life Balance\n\n 3 extra days if you use up your entire annual paid leave\n\n 1 day off for your birthday\n\n Flexible working hours\n\n Hybrid working model depending on the position\n\n Additional health insurance for you and your family\n\n Co-financed sports card\n\n Discounts at over 100 great places – shops, restaurants, hotels\n\n Not just a job. Growth.\n\n Personal mentor and access to an interactive e-learning platform\n\n A real career development plan\n\nWhat you will do:\n\nDesign the target technical architecture across network systems, inventory, provisioning, integration and infrastructure\n\nBuild and operate the platforms, from implementation through to day-to-day running\n\nConsolidate network inventory and geographic information systems, and lead the data migration\n\nDesign and implement service activation across multiple access equipment platforms\n\nDesign and establish the infrastructure: hosting, networking, identity management, backup and recovery\n\nDefine system integration interfaces and the APIs exposed to wholesale customers\n\nWrite technical requirements for major procurements and lead the technical evaluation of proposals\n\nAct as the organisation’s technical counterpart to equipment vendors and system integrators\n\nLead and develop the engineers who join the team\n\nWhat we are looking for?\n\nAt least 8 years in telecommunications technology, including 3 in a principal, architect or technical lead role\n\nHands-on experience with telecommunications operational systems — network inventory, geographic information systems, service activation or fault management. Advisory, consulting or pre-sales experience alone is not sufficient for this role\n\nWorking knowledge of fibre access technology: GPON, OLT and ONT equipment and associated element management systems\n\nDemonstrated experience of migrating data from legacy systems, including assessment and remediation of data quality\n\nInfrastructure engineering: Linux, virtualisation, cloud and colocation environments, networking, identity management\n\nAbility to specify technical requirements that suppliers can be held to, and to evaluate vendor claims critically\n\nComfortable operating as the sole technical specialist during an early build phase\n\nFluent Bulgarian and English\n\nNice to have:\n\nGeographic information systems in a telecommunications context — outside plant, fibre routes, splice management\n\nSubscriber management technologies: TR-069 device configuration, RADIUS and AAA, particularly in multi-tenant configurations\n\nWholesale or open-access network operations\n\nFamiliarity with TM Forum standards and Open APIs\n\nBecome part of our team!\n\nAPPLY NOW! Click “Кандидатствай” and send your CV by 7th of December 2026.\n\nOnly shortlisted candidates will be invited for an interview.","description_format":"text","description_chars":3262,"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":[]},"benefits":["Flexible schedule","Health insurance","Hybrid work"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Mobile Networks","Broadband"],"lifecycle":[{"event":"open","at":"2026-11-09T11:17:00Z"}],"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":28,"reasons":["seen:0","win:early"],"computed_at":"2026-11-10T05:22:02Z"},"pay":null,"html_url":"https://alion.io/job/vivacom-principal-engineer-oss-infrastructure","json_url":"https://alion.io/job/vivacom-principal-engineer-oss-infrastructure.json","meta":{"generated_at":"2026-11-10T05:22:02Z","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":12518,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-11T00:00:00Z"}},"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":55441},"rest":"https://alion.io/mcp/rest/get_company?id=55441"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fvivacom-principal-engineer-oss-infrastructure"},{"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%2Fvivacom-principal-engineer-oss-infrastructure"},{"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%2Fvivacom-principal-engineer-oss-infrastructure"},{"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/vivacom-principal-engineer-oss-infrastructure\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fvivacom-principal-engineer-oss-infrastructure"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3960470}},{"tool":"search_jobs","arguments":{"company":"vivacom.bg","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3960470},"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. Docs: https://alion.io/developers"}}