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Innovation Endeavors

(Senior) Core Engineer / Developer



Software Engineering
Espoo, Finland
Posted on Saturday, February 10, 2024

Location: Espoo, Finland

Role Type: Full Time

Skylo Technologies is a global NTN service provider based in Mountain View, CA, offering a service that allows smartphone and IoT cellular devices to connect directly over existing satellites. Skylo works with existing satellite operators, network operators, and device makers to provide subscribers an anywhere, anytime connectivity solution that seamlessly roams between terrestrial and satellite networks. Skylo's focus is on enabling connected services for people outdoors and connected workflows for machines at work across critical industries such as agriculture, maritime, logistics, mining, and others, in addition to mass-market consumer devices.

Skylo Technologies is hiring a Core Engineer. This person will be part of the team responsible for designing, enhancing and maintaining Skylo NTN Core Network. The right candidate will combine a depth of technical knowledge with a passion for creating novel software solutions.


  • Design, implement, maintain and enhance a 3GPP compliant NTN Core Network solution for Skylo’s hybrid (cellular+satellite) network deployments
  • Design Core features to optimise Skylo’s network to increase capability and efficiency for IoT and consumer applications
  • Coordinate features and enhancements development with partners
  • Support and enhance Core elements such as Diameter Routing Agent (DRA)
  • Interfacing with Core Network vendors to identify and resolve technical issues
  • Support Network Engineering and Operations
  • Inculcate accountability and ownership within the team - YBYO (You build it, you own it!) by promoting robust design, development and documentation practices


  • The successful candidate will have a solid grasp of the entire product development life cycle, from initial concept and requirements elicitation all the way through deployment and maintenance
  • Hands-on experience with EPC (Evolved Packet Core) components such as MME, HSS, SGW & PGW
  • Hands-on experience with EPC interfaces such as S1, S6a, S5, S8, SGi, SGd & SGs
  • Good understanding of SCEF (Service Capability Exposure Function)
  • Good understanding of 3GPP Control Plane Cellular IoT
  • Good understanding of Non-IP and IP data paths through an EPC
  • Hands-on development experience in one or more of the following technical areas:
    • C/C++
    • Virtual Machines
    • Docker, Kubernetes
    • Troubleshooting with EPC components in a live network
  • Bachelor's or Master’s in Communications Engineering, Computer Science or equivalent
  • Five or more years work experience in LTE/5G Core Network domain
  • You are proactive and have a hands-on approach to work assignments

What we offer:

With employees working across three continents, Skylo is 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 of additional benefits. such as:

  • Competitive compensation packages including a stock option based equity program
  • Benefits including a 401k plan
  • An unlimited PTO policy and the opportunity to temporarily work from abroad
  • Unique opportunity to participate in developing and running world’s first software-defined direct-to-device satellite network and service
  • Access to world-class team and talent across tech domains: software, hardware, chipsets, telecom, satellite and network virtualization
  • Open, transparent, inclusive culture that blends the Silicon Valley, Nordic and South Asia characteristics