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Backend Engineer – Real-Time Communications

EZAIXMalappuram, Kerala, India

2 days ago

Job description

Location : Remote (India)

Type : Full-time
Seniority : SDE II–III

Eligibility : IIT candidates only (B.Tech in progress or completed). Self-learners who love to upskill are welcome—but IIT status is mandatory.

Why this role

Help build resilient back-end services that power real-time communications analytics and automation at scale. You'll design APIs, process streaming data, and integrate with voice / telephony and cloud services to deliver low-latency, high-reliability experiences.

What you'll do

Design and ship backend APIs (Django / DRF), background / async jobs (Celery / RQ), and secure integrations with external services.

Build and optimize real-time data pipelines for call / quality metrics; own observability, tracing, and SLOs (p95 / p99).

Troubleshoot SIP / VoIP issues using packet captures and logs; automate analysis where possible.

Containerize workloads with Docker, contribute to CI / CD, and collaborate on cloud deployment (Azure / AWS).

Apply distributed-systems patterns (idempotency, retries, backoff, circuit breakers) for scale and fault tolerance.

Model data in PostgreSQL and MongoDB; tune indexes / queries; maintain migration discipline.

(Good-to-have) Prototype AI / ML features for analytics, anomaly detection, and conversational agents.

What you'll bring (must-have)

Python & Django : RESTful APIs, authentication / authorization, background tasks, testing, and performance tuning.

Networking fundamentals : TCP / IP, DNS, TLS, HTTP / 2; practical debugging with Wireshark; familiarity with NetFlow / SNMP.

Telephony domain : SIP signaling, RTP / RTCP, call flows, PSTN / VoIP basics; exposure to SBCs.

Cloud & DevOps : Working knowledge of Azure / AWS, Docker; Kubernetes exposure is a plus; comfort with CI / CD and secrets management.

Distributed systems : Microservices, event-driven design (queues / streams), horizontal scaling, resilience patterns.

Databases : Hands-on with PostgreSQL and MongoDB (schema design, indexing, migrations, backups / restore).

Mindset : Ownership, bias to automate, clear writing, and a product quality bar that values reliability and latency.

Nice to have

Kubernetes (Helm), IaC (Terraform / Bicep), metrics / log stacks (Prometheus / Grafana / ELK), OpenTelemetry.

Experience with Microsoft Graph / 365 ecosystems, webhooks, or real-time comms SDKs.

Practical AI / ML : time-series anomaly detection, clustering, or LLM-powered workflows.

90-Day success profile

30 days : Ship a well-tested Django service with one external integration; add dashboards / alerts for core SLOs.

60 days : Deliver an automated SIP call-flow parser or PCAP → insights tool; reduce a p99 latency or error budget hot spot.

90 days : Lead a small initiative end-to-end (design → deploy → postmortem), document runbooks, and mentor a junior dev.

What we offer

Impact on critical, high-scale real-time systems.

Autonomy, fast feedback loops, and a builder culture.

Competitive compensation; remote-first with flexible hours aligned to IST.

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Backend Engineer • Malappuram, Kerala, India

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