Solutions Engineer – SS7 Signalling, IP Routing

Skylo

Solutions Engineer enabling Skylo’s direct-to-device satellite connectivity through Diameter signaling and IP routing. Translating MNO profiles into production interconnects and validating live traffic.

Posted 8/20/2026full-timeEspoo • 🇫🇮 FinlandSeniorLeadWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in mobile-core signaling and telecom solutions engineering, with a strong focus on Diameter configuration, IP interconnect fundamentals, and protocol analysis. Proven ability to manage change control, documentation, and operational configurations in a live production environment.

Highest-signal resume keywords

Mobile-Core SignalingDiameter ConfigurationIP Interconnect FundamentalsWireshark Protocol AnalysisChange Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Diameter RoutingDRA/DEA ConfigurationS6a/S6d/SGd ProtocolsIR.21/RAEX Data TranslationFirewall/ACL CoordinationNIDD TroubleshootingAutomation with PythonInfrastructure as CodeNetwork Testing FrameworksSS7/MAP Experience

Soft Skills

CollaborationDocumentationProblem-SolvingAttention to DetailAdaptability

Tools & Technologies

WiresharkDNS/ENUMIPX/GRX NetworksNetwork Engineering ToolsConfiguration Management Tools

Industry Keywords

Telecom Solutions EngineeringRoaming InterconnectNetwork OperationsInterconnect IP AddressingChange-Control Practices

Tech Stack

Tools & technologies

DNSIoTPythonRealm

About the role

Key responsibilities & impact

Design and configure signaling, DRA/DEA routing, peers, connections, realms, Diameter identities, GT mappings, and point-code mappings
Translate MNO IR.21/RAEX inputs into accurate, version-controlled operational configurations
Plan interconnect IP addressing and coordinate DNS/ENUM, APN, realm resolution, firewall/ACL, and IPX peering changes
Own end-to-end IREG-side testing for network registration, attach sequences, S6a/S6d authentication, SGd SMS, and NIDD where applicable
Analyze Wireshark signaling traces and resolve failures across Skylo, IPX providers, and partner MNOs
Collaborate with Skylo IPX partners and MNO IPX teams to isolate routing and configuration issues
Establish change-control, peer-review, rollback, and documentation practices
Create LLD documents for every interconnection
Partner with Network Engineering, NOC, Security, Product, and external MNO technical teams through go-live and stabilization
Turn MNO profiles into production-ready Diameter connectivity and validated live traffic

Requirements

What you’ll need

10+ years of hands-on experience in mobile-core signaling, roaming interconnect, telecom solutions engineering, or network operations
Deep technical Diameter experience, including DRA/DEA configuration, realm routing, peer management, and S6a/S6d/SGd protocols
Strong IP interconnect fundamentals, including DNS/ENUM, routing, security controls, and firewall/ACL coordination over IPX/GRX networks
Advanced protocol analysis skills with the ability to read Wireshark traces to independently diagnose signaling failures
Proven experience translating complex IR.21/RAEX data into operational configurations and executing structured IREG validation
Disciplined approach to change management, documentation, configuration integrity, and live production risk
Preferred: NB-IoT NTN, NIDD, MME registration troubleshooting, SS7/MAP, STP, or IoT roaming experience
Preferred: Hands-on experience with Signalling & IP configuration in Core network
Preferred: Automation experience using Python, APIs, infrastructure as code, or network testing frameworks
Willingness to work onsite three days a week in Espoo, Finland
Ability to collaborate across multiple time zones and with global teams

Benefits

Comp & perks

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
Flexible approach to work
Equal opportunity and inclusive workplace