Senior Network Systems Engineer

Senior Network Systems EngineerLocation: St Louis, MO | OnsiteEmployment Type: ContractDuration: 6-12 monthsPay: $50/hrAbout: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 DetailsSeniority: Senior engineer, ordinarily 8 or more years of relevant hands-on experience. Mission: Design, build, and support the network behavior required to move live customer traffic between paired systems without disrupting persistent connections.Core responsibilitiesDesign and troubleshoot Layer 2 and Layer 3 network flows.Support IP movement, routing, failover, traffic draining, and recovery.Analyze TCP connection and socket behavior during maintenance and failure scenarios.Perform packet-level diagnostics and root-cause analysis.Partner with proxy developers on stateful traffic movement and connection preservation.Participate in integration, performance, resiliency, and production-readiness testing.Required skillsStrong hands-on Layer 2 and Layer 3 networking.TCP/IP, socket behavior, routing, ARP/GARP, VLANs, NAT, and high-availability patterns.Linux networking and systems troubleshooting.Wireshark, tcpdump, or equivalent packet-analysis tools.Practical experience with resilient or active-active network services.Preferred experienceFortinet, Cisco, F5, HAProxy, NGINX, Envoy, or similar technologies.Financial transaction, telecom, network-appliance, or other mission-critical environments.Linux kernel networking, eBPF, or low-level network diagnostics.Employment PracticesVLink 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.