Senior Voice SDET: Scale, Reliability & CI/CD

Doist; Wrocław; On-site; PLN 200,000 - 300,000; Full time

Benefits offered by this job

Medical Insurance (Allianz)

Life Insurance (Uniqa)

Glasses Reimbursement

Kafeteria (My Benefit)

Discretionary Time Off (DTO)

Volunteer Time Off (VTO)

Ericsson Care Line

Job summary

Vonage is seeking a Senior SDET IV in Poland to advance the voice test automation framework, covering SIP call flows, chaos testing, and non-functional testing across multiple AWS regions. You will design, implement, and maintain scalable test suites and SIPp scenarios while mentoring SDET engineers and shaping CI/CD practices.

You will collaborate with engineering to ensure reliable deployments, strengthen testability, and improve platform resilience across six global regions, leveraging

Qualifications

• B.S./B.A. degree in Engineering, Computer Science, or related discipline; or technical certification and/or equivalent experience
• Expert-level Python 3 proficiency, with deep experience in pytest (fixtures, markers, parametrize, conftest scoping, session/function/class scope management) and Pydantic models for typed request/response validation
• Deep SIP protocol expertise: INVITE/BYE/ACK/CANCEL flows, SDP negotiation, SIP headers, RTP/SRTP media paths, CDR validation, and SIP-level debugging with tools such as SIPp, Wireshark, or VoIPMonitor
• Proven experience designing and implementing automated test frameworks and suites (smoke, regression, performance, chaos) that measurably reduce defect escape in production
• Hands-on experience with Asterisk and/or FreeSWITCH as components under test in a SIP/VoIP environment
• Strong Kubernetes experience: EKS cluster access (kubectl, Helm, ArgoCD), namespace-level debugging, pod log inspection, and test environment management via Teleport or equivalent
• Solid AWS experience: EC2, S3, SSM Parameter Store, EKS, including programmatic interaction from test code

Responsibilities

• Influence architecture and design reviews with a focus on testability, SIP call flow coverage, performance, and the long-term automation strategy for the voice platform
• Architect and evolve our voice test automation framework, including API client layers, Pydantic-typed service abstractions, pytest fixture hierarchies, and Jenkins seed-based CI orchestration, to support continuous onboarding of new voice features and services
• Build and maintain scalable CI/CD-aligned test suites (smoke, regression, performance, chaos, non-functional) across all supported AWS regions; assess feature impact, close coverage gaps, and own quality gates for production deployments
• Author and own SIPp scenario XML files for complex SIP call simulations: inbound/outbound routing, SIP proxy API validation, emergency calling, domain auth (ACL/dauth), and multi-region failover scenarios
• Lead chaos and non-functional test strategy, designing fault injection scenarios (chaos-mesh, AWS FIS) targeting Asterisk, FreeSWITCH, Couchbase, Redis, PSLB, and INPS to validate platform resilience and failover behavior
• Drive quality operations: track, triage, and escalation defects and enhancements in JIRA; communicate risks, required test hooks, and release readiness to engineering and product stakeholders
• Mentor SDET III engineers in SIP testing, Python framework design, pytest best practices, and Kubernetes-based test environment management

Skills

Python

pytest

Pydantic

SIP protocol

Kubernetes

AWS

Wireshark

SIPp

CI/CD

Education

B.S./B.A. in Engineering or Computer Science

Tools

Jenkins

SIPp

EKS

GitHub Copilot

Job description

Vonage is seeking a Senior SDET IV in Poland to advance the voice test automation framework, covering SIP call flows, chaos testing, and non-functional testing across multiple AWS regions. You will design, implement, and maintain scalable test suites and SIPp scenarios while mentoring SDET engineers and shaping CI/CD practices.

You will collaborate with engineering to ensure reliable deployments, strengthen testability, and improve platform resilience across six global regions, leveraging