Senior Systems/Networks Engineer (Tier 3)

dxFeed is a subsidiary of Devexperts, a globally recognized fintech leader in capital markets technology. As an integral part of this established financial technology provider, dxFeed serves buy-side and sell-side firms worldwide, equipping traders, analysts, quants, and portfolio managers with accurate, real-time market data and insights to power smarter decision-making. We are looking for an experienced Senior Systems/Networks Engineer to join the team. We expect the Senior Systems/Networks Engineer to: Oversee and manage critical server and Unix OS subsystems, ensuring optimal configuration and performance, Maintain network equipment (Cisco), Maintain datacenter facilities (on-prem), Maintain cloud environments (AWS, GCP), Be active on the assistance for developers, participate in SRE/DevOps activities, Collaborate with network and security teams in aligning infrastructure with organizational policies and requirements, Implement and maintain system monitoring, backup, recovery, and automation solutions, Architect, design, install and configure managed installations, cloud-based clusters/networks. Automate cloud and hybrid (on-prem/cloud) platform and systems deployment, including load-based auto-scaling approaches, Be proactive in identifying and troubleshooting problems in testing and production environments (generating solutions and bug reports when required) and monitoring network/systems health and status, and continuously making improvements, Solve critical problems in network environments (multicast routing/latency issues/packet loss/etc) and in Systems, platforms, and data such as: unavailability/ outage/ inconsistency/ misconfiguration/ data delays/ etc.), Diagnose complex issues within network stack, including low-level packet capture and OS system analysis, Be engaged into on-call rotation to ensure 24x7x365 coverage for critical core and customer issues, Provide hands-on guidance and mentorship to junior systems engineers, ensuring quality and timelines, Contribute to documentation, best practices, and process improvements within the project or business unit, Communicate with clients and partner companies’ engineers on technical subjects. Must-have skills: 3+ years of experience in UNIX/Linux administration and/or Networking, Experience in Amazon Compute Cloud, In-depth knowledge of TCP/IP and ISO/OSI stack, Solid experience with networking (routing, switching, IP, TCP, UDP, BGP, EIGRP, VPN, DNS) and Cisco IOS, Knowledge of IP Multicast (RP, PIM, IGMP), Technical knowledge to ensure safe, effective, and efficient changes to the network and systems infrastructure CI/CD and DevOps/SRE activities experience, Proficiency in shell script languages: awk, perl, etc Preferred experience in cluster technologies and high availability systems, Experience in solving complex problems and the ability to handle multiple tasks and projects simultaneously, Strong analysis, investigation, and troubleshooting skills, Good written and spoken English language. Nice-to-have skills: Understanding high-performance, high-throughput, and low-latency network technologies, Knowledge of Java programming language, Experience with CDN architectures, Experience with WAN technologies, Experience with Trading/Exchange/Risk management software usage and management, Experience in working with GIT, Ansible, nginx, haproxy, and similar technologies, Experience with Atlassian software (JIRA, Confluence, etc.). dxFeed employees create the art of FinTech in comfortable working spaces located in modern business centers around the world. Join our team in Porto and enjoy: Work Regime Flexibility benefits: Possibility of hybrid/remote work mode Flexible working hours Work From Anywhere Program Occasional business trips to the US/EU/UK (having a valid passport is a heavy plus) Health and recreation benefits: Fully paid additional wellness days (3 unwell days per year) Medical insurance for the employees and children Reimbursement of fitness Meal allowance Flexpay system Facility benefits: Modern office with new equipment PlayStation, table football, and musical instruments in the office Parking spaces/transport reimbursement Meals in the office Free drinks and snacks Community benefits: Teambuilding activities Corporate parties Football club Music club Speakers' club Free admission to corporate external events Possibility of joining conferences and professional fairs Personal branding development support Professional training benefits: English language courses Local language courses for foreign employees Unlimited access to self-learning platforms Certification opportunities Mentorship Program Social benefits: Parental bonus Pension plan Referral bonus Blood donation paid leave