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The world still has coverage blind spots. You could help eliminate them at Skylo. Skylo has pioneered a standards-based approach to satellite connectivity. We connect smartphones and IoT devices directly to satellites. No special hardware, no entirely new networks. Just billions of existing devices, suddenly reachable anywhere on Earth. We're not building toward this future. We're already in it. Our direct-to-device service is live on millions of activated devices across five continents, covering more than 72 million square kilometers, in partnership with leading satellite operators, mobile network operators, Tier-1 chipset makers, and OEMs worldwide. And we're just getting started. At the heart of it all is Skylo's commercial NTN vRAN: a 3GPP standards-based, cloud-native platform that seamlessly bridges terrestrial and satellite networks. It's the infrastructure that makes true anywhere, anytime connectivity possible. When you join Skylo, you'll work at the intersection of three markets reshaping how the world stays connected: mass-market consumer devices, automotive, and industrial IoT. Enabling people outdoors and critical workflows in the world's most remote places. This is a rare chance to work on technology that matters, at a company that's already proving it works This role is based in Espoo, Finland, one of Skylo's core engineering hubs and fastest-growing sites. You'll work onsite three days a week as part of a team that's scaling quickly. You will collaborate with a high-velocity, global team spanning multiple time zones. About The Role Every Mobile Network Operator (MNO) onboarding timeline ends at a critical technical test gate. We are hiring an automation-oriented Senior IREG & Network Test Engineer to own that gate—from initial attach and authentication through SGd, MAP, SMS, IP NIDD, and roaming sign-off. You will replace manual, partner-dependent execution with a repeatable test strategy, a scalable testing environment, and an automated regression pipeline. Responsibilities Develop Test Strategy: Define the comprehensive IREG test strategy, pass/fail metrics, network tracing protocols, and official sign-off processes for each partner MNO. Execute Roaming Validation: Run end-to-end roaming testing across network registration, attach sequences, S6a/S6d authentication, SGd SMS-over-NAS, and IP/NIDD data paths. Optimize for NTN: Execute the standard GSMA-defined Roaming test suite while ideating and introducing custom validation test cases built specifically for NTN (Non-Terrestrial Networks). Build Automation Harnesses: Build and maintain an automation test harness and lab capable of running core GSMA and Skylo-specific routing scenarios consistently. Trace Analysis: Analyze Diameter/SS7 traces along with device and network logs to cleanly isolate configuration issues across Skylo, IPX, and MNO domains. Defect Management: Turn production and onboarding failures into repeatable regression test cases, managing defects through root cause analysis, remediation, and retesting. Portfolio Metrics: Publish clear test coverage, validation cycle-time, defect rates, and market-readiness dashboards for the onboarding leadership team. Cross-Functional Partnering: Coordinate closely with internal Signaling, Routing, Billing, NOC, and Product teams, as well as external IPX vendors and MNO test squads. Required Qualifications 5+ years of hands-on experience in roaming validation, mobile core operations, interconnect routing, IREG testing, or telecommunications network testing. Strong understanding of Diameter routing and relevant SS7/MAP concepts (including S6a/S6d, SGd, and roaming authentication/registration flows). Advanced protocol troubleshooting skills with experience reading Wireshark traces to diagnose failures involving multiple external parties. Proven experience designing automated telecommunications testing frameworks using Python (or comparable languages) integrated with modern CI/CD practices. Complete fluency handling IR.21/RAEX data profiles, PLMN structures, IMSI records, and TADIG codes. Preferred Qualifications Practical experience with NB-IoT, NTN satellite architectures, NIDD data paths, or cellular device-lab environments. Familiarity with IMSI Tracing tools, carrier-grade Diameter/SS7 diagnostic platforms, Jira, and Confluence. Direct experience integrating network signaling validation with TAP/BCE billing verification. What We Offer This is a once-in-a-lifetime opportunity to help build and run the world's first commercial, live direct-to-device satellite network. You'll work alongside a world-class team spanning software, hardware, chipsets, telecom, satellite, and network virtualization, some of the most sought-after expertise in the industry. And you'll do it inside a culture that's open, transparent, and inclusive, shaped by the best of Silicon Valley, Nordic, and South Asian ways of working. Benefits With employees working across three continents, Skylo is proud to be an equal opportunity employer dedicated to building an inclusive and diverse workforce. Our worldwide and inclusive culture encourages a flexible approach to work, and we also offer an attractive range benefits such as: Competitive compensation packages Occupational Healthcare and Health and Life Insurance E-passi including, wellness, culture, lunch and commuting benefit Phone & Internet allowance Individual learning & development budget for further personal and professional development EEO STATEMENT Skylo is an equal-opportunity employer and we celebrate diversity. We do not discriminate based on race, religion, color, ancestry, national origin, caste, sex, sexual orientation, parent or caregiver status, political affiliation, gender, gender identity or expression, age, disability, medical condition, pregnancy, genetic makeup, marital status, or military service consistent with applicable federal, state, and local laws. We are also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. Please let us know if you need assistance or accommodation due to a disability.
Here's how to pick the right one and stand out in your application.
144.883Jobs
31.687IN
81%EN
That number is real. WorkMundi's database shows 144,883 open engineer roles across the world. India has the most with 31,687 jobs, followed by the United States with 30,084. If you just finished reading one job ad and felt paralyzed by choice, you're not alone—but this scale is actually an advantage. It means you can afford to be selective.
Start by geography and language. The majority of engineer ads—117,837 of them—have the job posting text written in English. Use that as one filter, but remember: the ad text language tells you nothing about whether the role actually requires you to speak English day-to-day. Read the job description carefully. Then check which countries have the volume you're targeting. Singapore, Poland, and Australia round out the top five after India and the US.
Next, learn who's hiring. Accenture has posted 2,801 engineer roles. andurilindustries, speechify, and jobgether are also actively recruiting. If you're applying to one of these names, research their hiring patterns and interview style before you apply. That homework pays off.
When you interview, expect the question every engineer hears: 'Tell me about a time you had to debug a problem that wasn't in your job description.' Have a specific story ready—not a general one. Name the tools, the deadline pressure, and what you learned. Hiring managers listen for whether you see problem-solving as part of the role itself, not a favour.