Senior It Infra Engineer – Linux & Networking (Kollam)

About Firstsource: Firstsource Solutions Limited, an RP-Sanjiv Goenka Group company (NSE: FSL, BSE:, Reuters: FISO.BO, Bloomberg: FSOL:IN), is a specialized global business process services partner, providing transformational solutions and services spanning the customer lifecycle across Healthcare, Banking and Financial Services, Communications, Media and Technology, Retail, and other diverse industries. With an established presence in the US, the UK, India, Mexico, Australia, South Africa, and the Philippines, we make it happen for our clients, solving their biggest challenges with hyper-focused, domain-centered teams and cutting-edge tech, data, and analytics. Our real-world practitioners work collaboratively to deliver future-focused outcomes. Job Description: Role Overview: We are seeking an experienced Voice AI Infrastructure & Integration Engineer to own the platform reliability, observability, and telephony integration for our LLM-native voice agent. You will build the monitoring and tracing stack that gives full visibility into every call, own the call recording pipeline that satisfies FDCPA compliance, scale the orchestration runtime across container infrastructure, and integrate with telephony providers for SIP trunking, call routing, and audio stream handoff. Key Responsibilities: Observability, Logging & Monitoring Design and implement the full-stack observability pipeline using OpenTelemetry, Datadog, and ELK Stack — distributed traces, structured logs, and real-time metrics across every layer. Instrument the voice pipeline to emit per-turn telemetry: STT latency, LLM inference time, guardrail check duration, TTS first-chunk latency, and total round-trip time. Build alerting rules for latency SLA breaches, guardrail trigger rate spikes, STT/TTS error rates, and telephony drop rates. Create operational dashboards for real-time call volume, concurrent sessions, and per-vendor health. Call Recording & Compliance Own the call recording pipeline: capture full-duplex audio and per-turn transcripts, store in S3 / Azure Blob with FDCPA-compliant retention. Integrate with the QA & audit portal (MaestroQA / EvaluAgent) for call playback, AI-assisted scoring, and compliance flag review. Ensure PCI-DSS compliance for stored audio: redact Apply on Kit Job: kitjob.in/job/4mnqbl