At AVSystem, we are a Polish-based company behind a telco industry-leading Unified Management Platform (UMP) product allowing Communication Service Providers automatic setup, upgrades, and monitoring of millions of their client routers.We are seeking a dedicated Backend & Integration Engineer with a programming and networking background. Your role will focus on: Writing code & configuring our platform to customize it to our customers’ needs Cooperating directly with our customers during delivery and post-delivery support Key Responsibilities: Writing code and platform configuration during project delivery Write project-specific code in our platform GUI to facilitate router configuration Implement REST APIs (servers & clients) integrations with external systems Configure our platform GUI to display, monitor and report on router KPIs Report to Solution Architect and work with Software Engineers (code reviews) Post-delivery technical support Support integrations you've implemented, work with 1st & 2nd lines of support teams to diagnose, troubleshoot, and resolve issues effectively and promptly Ensure documentation & knowledge transfer to customer & support teams Customer accounting - work hands-on with customers via support portal, mails, calls Qualifications: Fluency in programming is a must Bachelor’s degree in Information and Communication Technology (preferred) or Software Engineering / IT / Electronics and Telecommunications Proficient in at least one programming language (Python preferred) Willing to learn in-house Scala-based functional language Experience in writing REST API integrations (both client & server-side) Familiarity with networking concepts: firewalls, IP, WLAN, TCP/UDP, HTTP(S), SNMP Basic Linux system administration skills such as gathering logs, executing scripts, familiarity with CLI tooling (curl, ssh, ss, tcpdump, traceroute, ping) Professional experience in Software Engineer role Fluent in English (B2/C1) Personality: You’re a rapid learner, analytical, and detail-oriented, excelling in solving complex problems independently within evolving requirements You are comfortable and effective in communicating directly with customers, adept at listening and clarifying their needs and expectations You’re capable of managing deadline pressures & context-switching to progress on multiple projects during a week [Nice to have] Experience in network-related role with integrated multi-system environments [Nice to have] Past positions in telecom domain (ACS, NMS, OSS, BSS know-how) What we offer: You’ll have a chance to deepen your expertise in maintenance to help us shape the way we deliver & support critical applications for telecommunications companies You’ll help us grow a leading technology IoT / device management company that creates software used by tier-1 telcos (e.g. Orange, Vodafone, AT&T, TMobile) around the world and makes Internet connection possible for millions of end-users Some usual stuff:  Kitchen full of snacks and treats (including Good Lood ice cream) Car parking area and bike room Multisport card, medical care Relaxed work atmosphere – no dress code, no open space Come join the best!