Principal Software Engineer developing scalable backend systems for Walmart's Digital Out of Home platform. Leading architecture, mentoring engineers, and guiding technical direction across thousands of retail locations.
About the role
- Unix/Linux Specialist troubleshooting OS, app, and code issues for enterprise clients. Diagnosing problems in complex client stacks and collaborating with engineering teams in Cluj-Napoca.
Responsibilities
- Perform deep Unix/Linux troubleshooting across production environments, including complex, multi-tier application stacks;
- Read, understand, and analyze application source code to: Trace application flows and execution paths;
- Identify logical flaws, performance bottlenecks, and potential bugs;
- Correlate code behavior with system-level symptoms.
- Troubleshoot software systems end-to-end, spanning: Operating system and process-level issues;
- Application runtime behavior;
- Configuration, dependencies, and integrations.
- Diagnose and resolve complex incidents, including emergency escalations, after-hours calls, and weekend support rotations;
- Develop and maintain internal diagnostic, automation, and support tools, primarily using Python and shell scripting;
- Participate in complex system upgrades, migrations, and environment changes, ensuring stability and minimal downtime;
- Understand and troubleshoot networking concepts including TCP/IP, DNS, load balancing, firewalls, and service connectivity;
- Quickly absorb and support application-level infrastructure knowledge across multiple client environments;
- Collaborate closely with engineering, operations, and customer-facing teams to improve platform reliability and operational excellence.
Requirements
- Expert-level Unix/Linux knowledge with strong hands-on troubleshooting experience
- Ability to read, understand, and reason about source code written in common backend languages (Python; C# / .NET Core)
- Solid understanding of application architecture and execution flows
- Proven ability to identify logical errors, misconfigurations, and potential bugs by correlating logs, metrics, code, and system behavior
- Strong troubleshooting methodology and systems thinking, with a bias toward root-cause analysis rather than workarounds
- Working knowledge of networking fundamentals and distributed systems concepts
- Experience operating in high-pressure, customer-impacting environments.
Benefits
- Medical Insurance MedLife
- Learning & Development
- Unlimited Microsoft training & certifications
- Sports benefit
- Bonuses and gift cards
- Meal vouchers
- Extra vacation days/annual leave
- Yearly bonuses based on the company’s performance
- Incentive Units/Shares Plan
Job title
Job type
Experience level
Salary
Not specified
Degree requirement
No Education Requirement
Tech skills
Location requirements
JA
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