[Remote] Senior SIM Expert (all)

Remote, USA
Posted Jun 12, 2026
Full-time

Note: The job is a remote job and is open to candidates in USA. 1NCE is a pioneering company at the forefront of reshaping the IoT connectivity landscape. As a Senior SIM Expert, you will work directly with the technical team to manage the SIM lifecycle, ensure compliance with specifications, and coordinate with vendors to standardize procedures.

Responsibilities
• SIM/eSIM profile management: Ensure correct parametrization of SIMs in compliance with GSMA and 3GPP specifications to guarantee seamless interaction between SIM, device, and network
• SIM lifecycle ownership: Oversee the entire SIM lifecycle process, from requirement engineering through to operational management
• Vendor coordination: Act as the primary interface to SIM and OTA vendors, standardizing SIM-related procedures across all partners
• Process documentation: Create and maintain clear documentation of technical processes to ensure consistency and transparency
• Project participation: Contribute to development projects that are connected to or reliant on SIM/OTA functionalities
• SIM customization and maintenance: Manage SIM customization, ongoing maintenance, and reprogramming to support operational needs
• Additional responsibilities: Handle handset interaction tracing, AuC security policy, and OTA-related processes

Skills
• Completed studies in Electrical Engineering, Technical Computer Science, or a related field of education
• Approximately 5 years of experience in a similar role, such as Engineering or Roaming
• Strong administrative and IT abilities with a solid background in the telecom industry
• Skilled in SIM card troubleshooting, including the ability to perform SIM, Wireshark, and network traces, provision SIMs, and change IMSIs
• Experienced in eSIM Remote SIM provisioning following GSMA SGP 01/02 standards
• Proficient in working with multi-IMSI applications and creating or updating related procedures
• Capable of liaising effectively with SIM vendors in collaboration with managers
• Experienced in maintaining OTA systems
• Able to perform basic checks on an HLR for SIM card provisioning
• Self-starter mentality, proactive, and confident in taking initiative
• Strong team player with a customer-focused mindset and a confident, competent professional appearance
• Experienced in maintaining OTA systems (preferred, though training can be provided if needed)

Benefits
• 26 Days of paid vacation per Year
• Further professional development - Become part of our international team and an exciting environment that will revolutionise the telecommunications market for IoT
• An exciting environment that will revolutionise the mobile market for IoT with simplicity
• Varied, agile work in a young company with an international team where fun is not neglected
• Short decision-making paths and plenty of room for manoeuvre - with us, you can really get involved and help shape the future
• Trust-based working hours, laptop, mobile phone and the option to work remotely
• Modern office in a central location with drinks, fruit, office snacks, subsidised Urban Sports Club membership and excellent public transport connections

Company Overview
• 1NCE provides IoT software and connectivity platform for connected products to customers managing devices across different countries. It was founded in 2017, and is headquartered in Köln, Nordrhein-Westfalen, DEU, with a workforce of 201-500 employees. Its website is https://1nce.com.

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