Telecommunications Engineer

MARQUIS TECHNOLOGIES PRIVATE LIMITED; Fatih; On-site; TRY 240,000 - 360,000; Full time

Job summary

Marquistech in Istanbul, Turkey, is seeking a senior field/test engineer to conduct pre-launch and field testing for mobile devices, including smartphones, IoT, and FWA routers. You will evaluate performance across 5G/4G networks and validate carrier requirements.

You will analyze KPIs, drive testing across RF environments, and collaborate with R&D to optimize handset and network features. A strong background in RF, protocol analysis, and hands-on tooling is essential, along with experience in

Qualifications

• Bachelor’s or Master’s degree in Telecommunications, Wireless Communication, or related field.
• 5+ years of experience in mobile device testing, chipset validation, and network optimization.
• Hands-on experience with 5G, LTE, VoLTE, VoNR, SRVCC, and IMS technologies.
• Strong knowledge of RF engineering, network optimization, and protocol analysis.
• Expertise in testing tools like QXDM, QPST, Nemo Outdoor, Wireshark, and JIRA.
• Ability to debug and analyze network issues related to interference, handovers, coverage, and data throughput.

Responsibilities

• Conduct pre-launch and field testing for mobile devices.
• Analyze network KPIs, coverage, throughput, call drop rate, handovers, and VoNR-MOS performance.
• Test and validate new features for mobile chipset platforms such as Qualcomm, MediaTek, and Spreadtrum.
• Execute end-to-end device validation, ensuring compliance with carrier and vendor requirements.

Skills

5G

LTE

VoLTE

VoNR

IMS

RF engineering

Protocol analysis

Network optimization

Debugging

Handovers

Education

Bachelor’s or Master’s degree in Telecommunications, Wireless Communication, or related field

Tools

QXDM

QCAT

QPST

Nemo Outdoor

Nemo Analyzer

NetAct

Wireshark

JIRA

Job description

Marquistech is an integrated Telecom domain company offering business value through innovative and cost-effective service delivery models to customers worldwide. Marquistech provides services for Mobile Handset Application Development and Testing. Marquistech has expanded its development and test service to global markets. The company’s field test and application development division has been successfully delivering CDMA and GSM field test services and new application development since 2005. Field testing is carried out across Asia Pacific (APAC), Middle East Africa (MEA), South-East Asia Pacific (SEAP) & Middle-East North Africa (MENA), Latin America, Saudi, Dubai, South Korea, UK, Australia.

URL: www.marquistech.com

Location: Instanbul (Turkey)

Job Description:

Conduct pre-launch and field testing for mobile devices, including smartphones, FWA (Fixed Wireless Access) routers, and IoT devices.

• Perform stationery and mobility tests for 5G/4G LTE/VoLTE/VoWiFi/5G across different network conditions.
• Analyze network KPIs, coverage, throughput, call drop rate, handovers, and VoNR-MOS performance.
• Test and validate new features for mobile chipset platforms such as Qualcomm, MediaTek, and Spreadtrum.
• Execute end-to-end device validation, ensuring compliance with carrier and vendor requirements.

Field & RF Optimization

• Conduct drive testing, log analysis, and troubleshooting of degraded KPIs for LTE/5G networks.
• Perform network benchmarking, RF tuning, and parameter optimization for improving performance.
• Work on interference analysis, cell selection/reselection, handover performance, and protocol validation.
• Optimize antenna configurations, coverage planning, and network deployment strategies.

Software & Firmware Testing

• Flash and verify new firmware builds for mobile devices, tablets, and IoT products.
• Debug issues related to network registration, voice/data performance, handover failures, and UI glitches.
• Use tools like JIRA, QXDM, QPST, Nemo Outdoor, Wireshark, and NetAct for bug tracking and log analysis.
• Test software compatibility, regression testing, and application performance across different platforms.

Testing Tools & Protocols

• Hands-on experience with:
  • QXDM, QCAT, QPST, Nemo Outdoor, Nemo Analyzer, NetAct, Wireshark, and spectrum analyzers.
  • DCAP, KPI Reporter, WebNei, Web Element Manager, and network simulators.
• Analyze LTE and 5G NR protocol stack, including SRVCC, CSFB, Inter-RAT handovers, and carrier aggregation.
• Test IP networking protocols, including IPv4/IPv6, SIM lock, PIN lock, and security protocols.
• Provide detailed test reports, recommendations, and troubleshooting support to R&D and development teams.
• Assist in long-term network planning and feature validation for telecom operators.

Required Skills & Qualifications:

• Bachelor’s or Master’s degree in Telecommunications, Wireless Communication, or related field.
• 5+ years of experience in mobile device testing, chipset validation, and network optimization.
• Hands‑on experience with 5G, LTE, VoLTE, VoNR, SRVCC, and IMS technologies.
• Strong knowledge of RF engineering, network optimization, and protocol analysis.
• Expertise in testing tools like QXDM, QPST, Nemo Outdoor, Wireshark, and JIRA.
• Ability to debug and analyze network issues related to interference, handovers, coverage, and data throughput.