We are seeking a 2nd Line Support Engineer who will provide application support to our customers. You will collaborate with customers and internal teams to offer 2nd line support, manage technical customer issues within Service Level Agreements (SLAs), configure the application to meet customer business use cases, ensure the quality of our knowledge base, and provide feedback to product teams.Your primary focus will be on supporting the Unified Management Platform (UMP), which is a flagship product of AVSystem targeted at telecoms. It enables automatic setup, upgrades, and monitoring of all client routers and other network devices.Once you're in the role you willManage customer issues related to the configuration and integration of the UMP application as the 2nd line of supportEnsure and maintain high satisfaction of our clientsCooperate with customers via Jira Service Management / remote meetings to solve 1st line escalations requiring application logic reconfiguration to ensure customer business use-cases are fulfilledTroubleshoot whether issues are located in our application or within surrounding systemsCooperate with project management and product teamsEscalate and cooperate in finding solutions with 3rd line of support in product teamsPerform application reconfiguration delegated by project managersProvide insightful feedback on missing tooling to project managers, development / site reliability engineering teamsEnsure high quality of our knowledge basePrepare, test and document work-around procedures and customer specific procedures for execution in the 1st and 2nd line of supportIdentify and improve the insufficient application documentation areasMaintain project documentation and update it with changes introduced in the support periodWork in a single shift (CET, business working hours)After several months of onboarding, take extra-paid 24/7 on-call support duties to handle 1st line escalations for critical application-logic related issues incoming outside of regular office hours in PolandWhat makes you an ideal candidate3+ years of professional experience in similar positionsFluency in English (B2, C1 nice to have)Good understanding of networking protocols, network principles and technologies inter-dependencies (application, OS, routers, IP, PKI, firewalls, API, LAN, WLAN, HTTP(S), TCP/UDP, DNS, DHCP)Good Linux system administration level skills such as gathering logs, executing scripts, hands-on experience in Linux CLI tooling (ip, systemctl, curl, ssh, tcpdump, traceroute, ping, systemctl etc.)Very good troubleshooting skills and attention to detailsPersonalityYou are Customer and Customer’s goals orientedYou’re able to work in context-switching situations, you are diligent and take responsibility to ensure progress on multiple issues at the same timeYou’re analytical, so over time you’ll be able to solve harder problems on your own and give feedback on missing tools / documentation for recurring problemsBonus points forBachelor’s degree in engineeringCCNA+ level network understandingUnderstanding of complex multi-server architectures with load balancers, MongoDB, device management protocols, and REST API automation with external toolsExperience in IT monitoring software – admin or userWhy work with usYou’ll have a chance to deepen your expertise in maintenance to help us shape the way we support critical applications for telecommunications companiesYou’ll help us grow a leading Polish IoT / device management company that creates software used by tier-1 telcos (e.g. Orange, Vodafone) around the world and makes Internet connection possible for millions of end-usersMany career paths and employee development optionsTransition to Project Manager role (application-level design / planning / deployment in the context of customer business use-case)Technical specialization (supporting our Site Reliability Engineers by working on optimizing our monitoring infrastructure and basic system administration)Some usual stuffFlexible working hours and fully remote work after onboardingKitchen full of snacks and treats (including Good Lood ice cream)Multisport cardMedical careCar parking area and bike roomA relaxed work atmosphere – no dress code, no open space!