{"id":2280617,"url":"https://alion.io/job/a1-bulgaria-network-api-developer","title":"Network API Developer","company":{"id":312367,"name":"A1 Bulgaria","domain":"a1.bg","url":"https://alion.io/company/a1-5","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":"middle","employment_type":null,"work_mode":"on_site","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":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"DNS","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"Go","optional":false},{"name":"gRPC","optional":false},{"name":"Java","optional":false},{"name":"Kong","optional":false},{"name":"Kubernetes","optional":false},{"name":"MPLS","optional":false},{"name":"Node JS","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"TCP/IP","optional":false},{"name":"Apache Kafka","optional":true},{"name":"Azure DevOps","optional":true},{"name":"CI/CD","optional":true},{"name":"GitHub Actions","optional":true},{"name":"JavaScript","optional":true},{"name":"Jenkins","optional":true},{"name":"RabbitMQ","optional":true},{"name":"Swagger","optional":true}],"status":"live","first_seen_at":"2026-09-23T09:48:55Z","employer_posted_date":null,"last_verified_at":"2026-09-23T09:48:55Z","board_verified":false,"closed_at":null,"days_open":23,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":23},"description":"Strength. Care. Growth\n\nDid you know that A1 Bulgaria is working on international projects as well?\n\nOur wide portfolio has long past the telecom services, and we are now offering digital solutions to millions of corporate, public, and private customers.\n\nState-of-the-art technology, the latest innovations, and extremely talented professionals in various areas help us deliver the best-in-class products, services, and customer experience.\n\nYou’ll know A1 Bulgaria is the right place for you if you are driven by:\n\nOpportunities to learn and build your career.\n\nMeaningful work in a stable and fast-paced company.\n\nDiversity of people, projects, and platforms.\n\nA supportive, fun, and inspiring place to work.\n\nWould you like to join us?\n\nBorislav Kosatev is looking for a new team member.\n\nWe are looking for a skilled Network API Developer to design, develop, and maintain scalable APIs that power network services and integrations. You will work closely with network engineers, backend developers, and product teams to build robust interfaces that enable seamless communication across systems.\n\nYour daily routine would include:\n\nDesign and develop RESTful and/or gRPC APIs for network services.\n\nIntegrate APIs with telecom/network infrastructure (5G, LTE, MPLS, SDN, etc.).\n\nBuild scalable, secure, and high-performance backend services.\n\nCollaborate with network engineers to translate network capabilities into APIs.\n\nImplement API versioning, documentation, and lifecycle management.\n\nEnsure high availability, reliability, and monitoring of APIs.\n\nTroubleshoot performance issues and optimize system performance.\n\nWrite clean, maintainable, and well-tested code.\n\nWe’ll know you can make it if you have:\n\nBachelor’s degree in Computer Science, Telecommunications, or related field.\n\n3+ years of experience in backend/API development.\n\nStrong experience with Python, Java, Go, or Node.js.\n\nSolid understanding of REST APIs, microservices architecture.\n\nExperience with API gateways and management tools (e.g., Kong, Apigee).\n\nKnowledge of network protocols (TCP/IP, HTTP, DNS).\n\nFamiliarity with containerization (Docker, Kubernetes).\n\nExperience working with cloud platforms (Azure, AWS, or GCP).\n\nStrong problem-solving and debugging skills.\n\nNice to Have\n\nExperience in telecom environments (5G Core, IMS, OSS/BSS).\n\nKnowledge of OpenAPI/Swagger specifications.\n\nFamiliarity with event-driven systems (Kafka, RabbitMQ).\n\nUnderstanding of network automation and SDN/NFV.\n\nCI/CD pipeline experience (GitHub Actions, Azure DevOps, Jenkins).\n\nOur gratitude for the job done will be eternal, but we’ll also offer you:\n\nInnovative technologies and platforms to “play” with.\n\nModern working environment for your comfort.\n\nFriendly, ambitious, and motivated teammates to support each other.\n\nThousands of online and in-person learning opportunities to grow.\n\nChallenging assignments and career development opportunities in multinational environment.\n\nAttractive remuneration package.\n\nFlexible working schedule and opportunity for home office.\n\nNumerous additional goodies, including, but not limited to free A1 services, discounts, health insurance and services, sports center, childcare, team and family events, etc.\n\nYou want to learn more? See us in action in our A1 Blog.\n\nSounds good? Apply now!\n\nOnly shortlisted candidates will be contacted.","description_format":"text","description_chars":3354,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Flexible schedule","Health insurance","Home office"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Smartphones"],"lifecycle":[{"event":"open","at":"2026-10-11T11:16:15Z"}],"visa":[],"liveness":{"score":44,"band":"fade","label":"Fading","p_open":0.85,"p_active":0.697,"p_room":0.75,"age_days":23,"expected_fill_days":27,"reasons":["seen:23","velocity","win:late"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/a1-bulgaria-network-api-developer","json_url":"https://alion.io/job/a1-bulgaria-network-api-developer.json","meta":{"generated_at":"2026-10-17T09:08:03Z","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":12045,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":312367},"rest":"https://alion.io/mcp/rest/get_company?id=312367"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fa1-bulgaria-network-api-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%2Fa1-bulgaria-network-api-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%2Fa1-bulgaria-network-api-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/a1-bulgaria-network-api-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fa1-bulgaria-network-api-developer"}]}