We're Hiring

We are looking for a Senior Backend Tech Lead to join our infrastructure team. In this role, you will design, develop, and maintain backend systems to drive product scalability and performance. You will work with a range of technologies, including Python, Java, SQL, REST APIs, and cloud services, with deployments in both cloud and on-prem environments. You will collaborate closely with engineers, product managers, and other stakeholders to build new features and optimize existing systems to meet business demands.

Responsibilities:

• Own and maintain core backend services that support millions of daily operations.
• Collaborate with cross-functional teams to deliver high-quality features using Agile methodologies.
• Ensure backend infrastructure is scalable and efficient, leveraging cloud services for server deployment.
• Optimize system performance for both cloud and on-prem deployments.

Skills and Qualifications:

• 10+ years of experience with Java and Python; prior Tech Lead experience is required (5yr+).
• Proven experience in developing and supporting high-scale systems.
• Expertise with cloud platforms (AWS, GCP, Azure) and server deployment.
• Experience with on-premise deployments is a plus.
• Strong background in working with large database environments, preferably PostgreSQL.
• Familiarity with Agile development practices.
• Ability to take ownership of tasks, driving them from concept through production.
• Strong communication skills in English, both written and verbal.
• Proficiency with frameworks like Spring, Hibernate (or similar).
• Experience with FastAPI, Pydantic, SQLAlchemy (or similar).
• Familiarity with task queues and real-time solutions such as Celery, Redis, Sentry (or similar).
• Previous experience in a tech startup is a plus.
• Passion for DevOps is a plus.

**This role is full-time from our Israel office**

• Job Title*
  Select a positionSr Backend Tech LeadSystem Engineer
• Job Location*
  Job LocationNew York, NYHod HaSharon, Center District, Israel
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AppCard is seeking a Senior Systems Engineer with strong expertise in Linux systems, infrastructure automation, and TCP/IP–based network troubleshooting, supporting production environments and customer-facing POS integrations.

This is a hands-on operational role responsible for system reliability, automation, and advanced incident resolution across Linux infrastructure, POS networks, and data pipelines. The role works closely with Engineering, Product, Customer Success, and Support to ensure platform stability and an excellent customer experience.

Responsibilities:

• Administer, monitor, and troubleshoot Linux-based production and customer-facing systems supporting POS integrations
• Design, implement, and maintain Ansible-based automation for configuration management, deployments, and system consistency
• Diagnose and resolve TCP/IP protocol–level issues, including routing, connectivity, latency, packet loss, and network performance problems
• Troubleshoot POS environments, including store networks, on-prem systems, and data transmission between POS, edge devices, and cloud services
• Act as an escalation point for complex or recurring incidents, performing root-cause analysis and driving long-term remediation
• Perform database troubleshooting, including SQL querying, data validation, and basic performance analysis
• Collaborate with Engineering on incidents involving infrastructure, configuration, or application-level defects
• Use monitoring and observability tools to identify, analyze, and resolve system and performance issues
• Document system architecture, operational procedures, runbooks, and customer-facing technical guidance
• Build and maintain internal and external technical knowledge bases
• Manage multiple concurrent issues while providing clear, timely communication to customers and internal stakeholders
• Participate in off-hours and weekend on-call rotations for mission-critical systems

Requirements:

• Bachelor’s degree in Computer Science, Information Technology, or a related field (or equivalent experience)
• Strong hands-on experience with Linux system administration in production environments
• Proven experience with Ansible for automation and configuration management
• Solid understanding of the TCP/IP protocol stack and hands-on troubleshooting at the protocol level
• Experience supporting or integrating with POS systems or retail technology environments
• Working knowledge of databases, including SQL querying and troubleshooting
• Familiarity with system monitoring, logging, and alerting tools
• 3+ years of experience in Systems Engineering, Technical Operations, or advanced Technical Support roles
• Strong analytical and problem-solving skills
• Excellent written and verbal communication skills with a customer-first mindset
• Highly organized and able to manage multiple priorities in a fast-paced environment

Nice to have:

• Experience using Grafana for monitoring, dashboards, and operational visibility
• Experience working with Salesforce, particularly in support, case management, or operational workflows
• Exposure to IoT, edge devices, or distributed retail environments
• Scripting experience (Bash, Python)

* This position requires off hour support and weekends *

**This role is full-time from the office in NYC**

Salary Range: $70,000 – $85,000

• Job Title*
  Select a positionSr Backend Tech LeadSystem Engineer
• Job Location*
  Job LocationNew York, NYHod HaSharon, Center District, Israel
• Name*
  First Last
• Email*
• Upload Resume*
  Accepted file types: pdf, doc, docx, Max. file size: 100 MB.
• Message
• Comments
  This field is for validation purposes and should be left unchanged.

Δ