Software Test Engineer-EDGE-TO-CLOUD & Mobile/WEB

Centum T&S India is a Business unit of Centum Electronics Group offers a wide range of electronic and embedded systems design engineering services to Global Customers to help them realize complex products and sub systems. Centum T&S India (CAI) is an Electronics Design Centre of Excellence, designing for mission critical projects in Aerospace/Space, Transportation, Medical Electronics, Dfense Electronics etc. It has other design centres in France, USA, Canada & Germany.

The ideal candidate is a self-motivated, multi-tasker, and demonstrated team-player. You will be responsible for the delivery of the items assigned to you with quality and should interact with cross functional team and resolve the problem. You should excel in working with global stakeholders and have outstanding communication and leadership skills and report to the Project Manager.

What You'll Do

• Hybrid testing: Exploratory for usability/edge cases + robust automation for regression and continuous testing.
• Edge device & data transfer: Validate firmware, secure boot & OTA with rollback, sensor correctness, power/thermal; test store and forward, ordering, de duplication, and integrity across offline/online transitions.
• Mobile edge gateway: Verify multi WAN (cellular/Wi Fi) behavior, APN/VPN, bandwidth/jitter tolerance; enforce systemd/journald health, watchdogs, cgroups, and remote diagnostics.
• Cloud & APIs: Contract & functional tests (OpenAPI/JSON Schema; consumer driven contracts).
• API load/performance: steady/spike/soak/chaos; p95/p99 latency & error budgets; idempotency & pagination under load; versioning compatibility.
• Multi tenant isolation, authZ/authN (RBAC/ABAC), throttling, blue/green/canary + rollback.
• Web & Mobile apps:
• Automation with Playwright (web) and Appium (mobile); cross browser/device matrices.
• Offline/poor network behavior, background sync, deep links, push notifications, WCAG accessibility, and UI under load validations.
• Connectivity protocols: MQTT (QoS 0/1/2, retained, LWT, session expiry), CoAP, HTTP/HTTPS; impairment injection (loss/jitter/bandwidth caps) and recovery.
• Performance & resilience (end to end): Reconnect storms, broker/node restarts, partial region loss; verify back pressure, graceful degradation, and recovery within target RTO/RPO.
• Observability & CI/CD: Embed API/UI/perf suites in pipelines with quality gates; publish dashboards (latency, traffic, errors, saturation), traces, and correlated logs for RCA; track flake rates & trends.

Key values, beliefs, and attitudes

• Results-orientation: Focus on Customers, provide quality deliverables on time, within estimated effort with high quality.
• Assure endtoend quality from edge devices & gateways through secure cloud ingestion & APIs to web/mobile apps. Deliver riskbased strategy, automation, and performance/security/resilience programs wired into CI/CD.
• Characteristics for a design engineering services business: establish trust, responsive to change/adaptability; learn continuously, proactive, positive & joyful.

Who You Are?

• 5 to 14 years

  in QA for IoT/distributed/cloud systems with strong Linux fundamentals.
• Proven

  Python

  automation and

  web/mobile

  test development; handson

  MQTT & API load/perf

  at scale.
• Experience integrating tests into

  CI/CD

  with blocking thresholds, artifacts, and dashboards.

• Languages:

  Python (PyTest/Robot), TypeScript (Playwright), Bash; Appium (Python/JS bindings).

• Protocols & networking:

  MQTT, CoAP, HTTP/HTTPS; TLS/mTLS, OAuth2/OIDC/JWT; Wireshark/tcpdump; tc/netem for shaping; mitm for negative testing.

• Edge/Linux:

  systemd/journald, logrotate, cgroups, watchdogs, secure update; serial/USB tooling for device bringup.

• Cloud & containers:

  Docker/Podman, Kubernetes/OpenShift; API gateways; streams/queues (Kafka/AMQP/MQTT bridges); timeseries/document/relational/object stores; backup/restore validation.

• Automation & API tools:

  PyTest, Robot, Playwright, Appium, Postman/Newman, REST Assured; OpenAPI/JSON Schema; Pact (consumer contracts).

• Performance & chaos:

  k6

  , JMeter, Gatling; MQTT load (mqttcli/mosquitto/paho); Toxiproxy, tc/netem for impairment; capacity/headroom analysis.

• Security:

  OpenSSL/cfssl, cert rotation/pinning, WAF/ratelimit tests, secrets management, SAST/DAST awareness.

• Observability:

  Prometheus/Grafana, ELK/Loki, OpenTelemetry + Jaeger/Tempo.