With over 1,000 employees working globally, VLink has helped SMBs, and large enterprises achieve their business goals, and gained the trust of Fortune-250 companies. VLink, founded in 2006, is a leading global provider of software engineering services with next-gen technologies and best-in-class talent.

Job Title: Senior Test and Resiliency Engineer

Location: St Louis, MO | Onsite

Employment Type: Contract

Duration: 6-12 months

Pay: $50/hr

About:

VLink, founded in 2006, is a leading global provider of software engineering services with next-gen technologies and best-in-class talent. Our Headquarters are in the U.S, and we have offices in 7+ countries from North America-Europe to APAC, with expansion plans in the Middle East. With over 1,000 employees working globally, VLink has helped SMBs, and large enterprises achieve their business goals, and gained the trust of Fortune-250 companies. VLink is 'Great Place to Work CertifiedTM' and has been a consistent winner as- Best Places to Work in CT. Trust, collaboration, and accountability are the three elements that are at the core of VLink's work culture. We value our professionals, providing comprehensive benefits and the opportunity for growth.

Job Description:

Seniority: Senior engineer or test architect, ordinarily 8 or more years of relevant experience.
Mission: Define and execute the validation strategy for functional behavior, transaction integrity, performance, failover, recovery, monitoring, and production readiness.

Core responsibilities:

• Build end-to-end test plans across representative lab and lower environments.

• Validate traffic movement and persistent TCP connections during planned maintenance and failure scenarios.

• Verify there is no unacceptable message loss, duplication, ordering issue, or customer-visible interruption.

• Execute functional, integration, regression, negative, failover, recovery, load, soak, and capacity testing.

• Validate proxy bypass and return-to-legacy recovery procedures.

• Reproduce defects, analyze logs and packet captures, and partner with developers on root-cause analysis.

• Define test evidence, acceptance criteria, certification results, and operational sign-off inputs.
  

Required skills:

• Resiliency, performance, network, and integration testing.

• TCP/IP and packet-level troubleshooting.

• Automated test frameworks and failure-injection techniques.

• Performance and capacity tools for high-throughput services.

• Strong defect analysis and technical documentation.
  

Preferred experience:

• Financial messaging, ISO 8583, payment switching, telecom, or other high-availability transaction platforms.

• Proxy, load-balancer, network-service, or active-active failover testing.
  

Employment Practices:

VLink is an equal opportunity employer committed to fostering an inclusive environment where diversity is celebrated. All qualified applicants will be considered for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status. Employment is contingent upon successful completion of a background check.

This job application process may use AI-powered tools to assist in screening and evaluating applications based on objective, job-related qualifications. AI is used solely to support the recruitment process and all final hiring decisions are made exclusively by our human recruitment team.

Applicant information will be handled in accordance with VLink's privacy policy.