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Who You Are
You catch problems before they explode-testing edge cases and degraded paths others overlook so production fire drills can be prevented. You care deeply about the tools you use and create, shaping the internal frameworks and pipelines your team depends on. Your work validates millions of real-time customer interactions every day, from web to telephony platforms, and you're always growing through peer reviews, knowledge sharing, and mentoring. You thrive in flexible, human-centered environments where hybrid collaboration and sustainable engineering aren't just buzzwords, but the way you work. If you love building robust, high-throughput test platforms as much as we do, we'd love to hear from you!
At Vail, our QA Engineering team is deeply technical - we don't just validate features, we build the frameworks and infrastructure that test real-world signaling flows, analyze media quality, and run performance tests that mimic millions of live voice and web sessions. We're engineers at heart, with a QA-first mindset and a passion for building robust, scalable systems that reveal issues before our customers do.
As a Software Engineer, Test & Infrastructure II, you will be doing both English and Spanish QA testing of call flows and writing automated test cases.
Please note: This position requires fluency in both English and Spanish.
Required Spanish proficiency: C1 CEFR or higher (or equivalent). You must be able to understand and evaluate complex spoken and written Spanish, identify linguistic and localization issues in call flows, and accurately validate Spanish-language user experiences.
What You'll Do

• Design and Extend Automation Frameworks: Build maintainable, modular test infrastructure in Python, Perl, Java, or Ruby that adapts to evolving APIs and systems.
• Develop Advanced Test Suites: Own automation for complex functional, integration, and regression scenarios across distributed microservices and telephony systems.
• Validate Real-Time Systems: Contribute to test harnesses that validate signaling flows (SIP, RTP, SDP, WebRTC) and API transactions under varying network conditions.
• Enhance CI/CD Integration: Implement, optimize, and maintain automated test pipelines in Jenkins or similar systems, including containerized and Kubernetes-based environments.
• Collaborate Across Disciplines: Partner with developers, QA peers, and DevOps engineers to ensure tests are integrated early in the release cycle and deliver meaningful insights.
• Analyze Failures & Root Causes: Use log aggregation tools, packet captures, and dashboards (e.g., Kibana, Grafana) to diagnose failures and improve coverage or resiliency.
• Contribute to Test Data & Metrics: Work with SQL and NoSQL databases to generate and validate test data, interpret automation results, and measure performance.
• Mentor & Share Knowledge: Help guide junior engineers in automation practices, framework design, and debugging strategies.
• Drive Continuous Improvement: Identify gaps in test coverage, reliability, and efficiency-propose and implement technical solutions that raise QA maturity.

Qualifications - We encourage you to apply if you think your experience may be a match, even if you do not meet all of the qualifications.

• Education: Bachelor's degree in Computer Science/Engineering or a related field, or equivalent experience
• Experience: Typically, 2-5 years in software development, test automation, or QA infrastructure engineering.
• Spanish proficiency: C1 CEFR or higher (or equivalent).
• Programming Skills: Strong proficiency in one or more of Ruby, Java, C#/.NET, C++, Perl, Python, or JavaScript
• Frameworks & Tools: Experience with JUnit, TestNG, PyTest, RSpec, Cucumber, or equivalent automation frameworks.
• CI/CD & Containers: Working experience with Jenkins (or similar), Docker, and basic Kubernetes workflow (jobs, pods, Helm charts).
• Systems Knowledge: Familiarity with distributed architectures, API testing, and network-level debugging.
• Telecom/Media (Preferred): Exposure to SIP/SDP/RTP, WebRTC, or similar signaling and media systems.
• Databases: Solid understanding of SQL and NoSQL databases for data-driven testing.
• Analytical Skills: Strong problem-solving mindset, able to triage and isolate issues across multiple layers of the stack.
• Collaboration: Experience in Agile environments; comfortable contributing to cross-functional sprint work, code reviews, and retrospectives.

$89,400 - $116,400 a year
The base salary range provided is determined by market data matched to the job description and the level of the position, based in our industry and the Chicagoland area. We often consider candidates who do not meet all the qualifications listed in the job description (i.e., more or less years of experience, etc.). Therefore, an offer for this position may differ from the base salary range provided depending on the qualifications/skills of the candidate. In this case, an updated pay scale would be provided.
Who We Are
At Vail, we believe in the unique power of voice interactions to create more expressive, more intimate, and more efficient interpersonal interactions. Using Vail technology, we make millions of voice interactions better every day. We process around 10% of all toll-free call traffic in the U.S.; 1 in 10 times, when someone calls a customer support hotline, Vail is routing or interacting with that call.
We are rapidly growing across multiple dimensions, including our customer base, the scope of products we offer, and the size of our team. Now is the right time for a strong candidate to join and grow with us. We have a supportive culture where employees are encouraged to achieve both personal and team goals because we believe growth leads to both business impact and personal fulfillment.
We offer competitive compensation and affordable benefits with flexibility and choice to meet individual and family (including Domestic Partnerships) needs, including:

• Multiple medical, dental, and vision plan options
• Company-paid life insurance, short and long-term disability
• 401(k) savings plan with company match (50% on first 6% of employee contribution)
• 35 days total annual PTO
• Annual Bonus Program
• Paid maternity and paternity leave
• Relocation allowance
• Employee referral bonus
• Gym membership
• Technical and Professional Development stipend

We are striving to implement and sustain an inclusive and equitable work environment for all employees by sourcing underrepresented groups and continually empowering those individuals within our organization to further enrich Vail's communication solutions. We recognize that equitable and unique individuals benefit our teams' problem-solving, innovation, and development efforts.
Our offices are located in Deerfield and Chicago, IL. Interviews and onboarding are conducted in our offices when possible. We observe a hybrid work format that provides employees with the flexibility to collaborate with team members based on business needs.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.