Integration Software Engineer

Why should you join us?AVSystem is the company behind the Unified Management Platform (UMP) – a solution used by Tier-1 telecom operators such as Orange, Vodafone, AT&T and T-Mobile. Our software enables automatic configuration, upgrades and monitoring of millions of routers worldwide.This role has real impact. You won’t be building internal tools or proof-of-concepts — you’ll deliver solutions that run in production environments at global scale.As an Integration Software Engineer, you will:combine software engineering with real networking environments,work directly with customers and see the results of your work,develop expertise at the intersection of backend development, integrations and networking,collaborate closely with domain experts (Senior Engineers, Product Owners, Solution Architects) from the very beginning,learn and use our Scala-based functional DSL designed for large-scale device management.This role is a strong fit if you want to:understand systems end-to-endtake ownership of production-grade integrationsgrow toward Solution Architecture, system integrations, or telecom/IoT domainsWhat does the day-to-day work look like?Your work combines development, system integration and project collaborationIn practice, you will:write project-specific code (Python and our in-house functional language)implement and integrate REST APIs (both client and server side)configure UMP for specific customer deploymentswork with routers and external systemsanalyze logs and troubleshoot issues (Linux CLI, tcpdump, curl, ssh)collaborate with Solution Architects and Software Engineers (including code reviews)support your integrations after delivery together with 1st and 2nd line support teamsWork distribution typically looks like:40–50% development and configuration30–40% integrations and troubleshooting10–20% direct customer communication (calls, emails, support portal)The pace can be project-driven — especially around delivery milestonesWho is this role NOT for?You may not enjoy this role if:you prefer pure backend development with no customer interactionyou don’t like troubleshooting production issues and analyzing logsyou’re uncomfortable taking responsibility for live system integrationsyou’re looking for a fully remote role (Kraków onsite / hybrid preferred)networking topics (IP, TCP/UDP, firewalls, SNMP) don’t interest youyou expect close managerial guidance and step-by-step instructionsThis team operates with a high level of autonomy. There is no micromanagement here — and no one will “hold your hand.”From the beginning, you’ll be expected to:take ownership of your integrationsmanage your work independentlyproactively seek information and solutionsunderstand the purpose behind what you’re building — not just execute tasksIf you thrive in environments with strong structure, constant supervision and clearly predefined paths, this may not be the right fitBut if you value autonomy, ownership and understanding the bigger picture — you’ll likely feel at home!What do you need to succeed?Strong programming skills (Python preferred)Experience with REST APIs (client and/or server side)Understanding of networking fundamentals (HTTP(S), TCP/IP, WLAN, firewalls)Basic Linux administration skills (log analysis, CLI tools, ssh, tcpdump)English proficiency (B2/C1)Willingness to learn our Scala-based functional DSLNice to have:Professional experience as a Software EngineerExperience in multi-system integration environmentsTelecom domain exposure (ACS, NMS, OSS, BSS)What does the recruitment process look like?Intro video-call with HR (45 min) – expectations, background, role context + basic technical checkTechnical and managerial interview [combined] (~3h) – programming, APIs, networking fundamentals + project discussion and working styleFinal decision and feedbackThe whole process usually takes 2–3 weeksCome and work with the best!