Principal Engineer - OSS Testing

Role & responsibilities

Design, build, and maintain automated test suites for OSS services provisioning and

service activation, fault management, performance management, configuration

management, and network/service inventory.

Own end-to-end and integration testing across OSS microservices and the interfaces to

the NTN core, gateways, and network elements.

Validate service assurance flows — alarm handling, event correlation, KPI/performance

collection, and SLA monitoring.

Build and extend test automation frameworks (API, service, and data-layer) and wire

them into CI/CD so quality gates run on every change.

Validate integrations and data flows between OSS systems and network elements,

including API contracts, event/message flows, and data consistency.

Define test strategy and coverage for new OSS features, working with engineers and

product from design through release.

Investigate failures across distributed systems — trace issues through logs, message

queues, and databases, and drive them to root cause.

Contribute to non-functional testing (performance, resilience, data integrity) for

high-throughput provisioning and monitoring flows.

Mentor engineers on test design and quality practices, and help raise the bar for the

team.

What you'll bring

5+ years in QA / test engineering, with meaningful time testing telecom OSS systems

(provisioning/activation, fault or performance management, service assurance, or

network inventory).

Strong test automation skills in Python and/or Java, with frameworks such as pytest,

TestNG, REST Assured, or Selenium.

Solid API testing experience (REST, Postman/Newman) and comfort validating contracts

between services.

Working knowledge of SQL and relational databases, and experience validating data

across systems.

Experience testing microservices and event-driven architectures (e.g., Kafka or similar

messaging).

Hands-on with CI/CD pipelines (GitLab CI, Jenkins, or similar) and integrating automated

tests into them.

Strong debugging instincts across distributed systems and a habit of driving issues to

root cause.

Clear communicator who can work across engineering, product, and network teams

spanning multiple time zones.

Nice to have

Familiarity with 3GPP / NTN or cellular core network concepts (5G core, network

functions, service activation).

Exposure to TM Forum Open APIs or standard OSS reference models (FCAPS, service

assurance frameworks).

Experience with network monitoring, alarm/event correlation, or telemetry pipelines.

Performance and load testing experience (JMeter, k6, Gatling, or Locust).

Containers and orchestration (Docker, Kubernetes) and cloud platforms (AWS or GCP)

Preferred candidate profile

Perks and benefits