{"id":3330931,"url":"https://alion.io/job/bmw-techworks-india-voip-platform-infrastructure-engineer-base","title":"VoIP Platform / Infrastructure Engineer - Base","company":{"id":4445239,"name":"BMW TechWorks India","domain":"bmwtechworks.in","url":"https://alion.io/company/bmw-techworks-india","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career site","truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Pune, India"],"countries":["IN"],"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":"Amazon CloudWatch","optional":false},{"name":"Amazon EC2","optional":false},{"name":"AWS","optional":false},{"name":"AWS Lambda","optional":false},{"name":"Blue-Green Deployment","optional":false},{"name":"CI/CD","optional":false},{"name":"DNS","optional":false},{"name":"IAM","optional":false},{"name":"Least Privilege","optional":false},{"name":"Linux","optional":false},{"name":"Python","optional":false},{"name":"Terraform","optional":false},{"name":"Wireshark","optional":false}],"status":"live","first_seen_at":"2026-10-27T12:04:22Z","employer_posted_date":"2026-10-27","last_verified_at":"2026-10-30T07:20:39Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Product Knowledge (Installation, Configuration, Operations, Maintenance)\n- Asterisk (deep): Strong operational and development-level understanding of Asterisk internals, especially large and complex dialplans with business logic.\n- Dialplan engineering: Ability to design, refactor, and troubleshoot multi-branch call flows, failover paths, and edge-case routing behavior.\n- Call encryption: Practical handling of TLS and SRTP in production, including certificate lifecycle and interop troubleshooting.\n- SBC stack: Solid Kamailio skills for SIP routing/policy and RTPengine operation for media anchoring, NAT traversal, and media security.\nSIP Capture and Troubleshooting\n- PCAP and Wireshark: Confident packet-level troubleshooting for SIP, RTP, SRTP, TLS handshake issues, retransmissions, and one-way audio.\n- Homer SIP capture: Efficient use of capture/visualization to correlate signaling and media events across distributed components.\n- End-to-end call tracing: Ability to correlate identifiers (Call-ID, tags, branch params, dialogs) across Asterisk, Kamailio, and SBC layers.\n(- Test strategy depth: SIP integration tests, regression suites for dialplan logic, and synthetic call monitoring in production-like environments.)\nOperating System and Automation\n- SUSE Linux (LPIC-1 level or higher): Comfortable with package/service management, networking, process control, and system diagnostics.\n- Python (basic): Scripting for automation, validation, and lightweight operational tooling.\n- Cron and shell scripting: Building and maintaining jobs for log rotation, housekeeping, health checks, and routine maintenance tasks.\n- Log and filesystem hygiene: Managing retention, rotation policies, and storage pressure under high call volume.\nNetwork and VoIP Foundations\n- TCP/UDP deep understanding: Behavior under packet loss, reordering, retransmissions, and impact on signaling/media quality.\n- VoIP protocols (deep): SIP, RTP, SRTP, TLS, mTLS, codec negotiation, DTMF transport, NAT and firewall implications.\n- SIP protocol internals (RFC-level): Transaction/dialog state machines, timers, forking, early media, PRACK/100rel, session timers.\n- Network services (deep): DNS behavior (including latency/caching/failover effects), NTP sync relevance for logs/traces, and routing basics.\n- High availability and disaster recovery: Active-active/active-passive design, failover testing, backup/restore drills, RTO/RPO ownership.\nAWS and Infrastructure as Code\n- Core AWS: EC2, VPC, Route 53, Security Groups, CloudWatch, and basic Lambda usage.\n- Resilience testing: AWS FIS basics for controlled fault injection and validation of failover behavior.\n- Secrets and access management: IAM least privilege, secret rotation, certificate/key lifecycle, and auditability.\n- Terraform: Versioned, repeatable infrastructure provisioning and safe change workflows (plan/review/apply discipline).\nDevOps and Reliability (Mandatory for Dev + DevOps Collaboration)\n- CI/CD pipelines: Build, test, security checks, and controlled release promotion.\n- Observability operations: Metrics, logs, traces, and alert tuning to reduce noise and improve incident response.\n- Incident response: Structured triage, rollback decision-making, and post-incident analysis.\n- Release and change governance: Blue-green/canary strategy, maintenance window practices, and backward-compatible migration planning.","description_format":"text","description_chars":3385,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"phd","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Embedded Software & RTOS","Autonomous Driving","Engineering Services","Automotive Software"],"lifecycle":[{"event":"open","at":"2026-10-27T12:04:22Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring 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