Mobile Core Engineer

United States /
Technology – Telecom /
/ Remote
OXIO is the first NeoTelco. We are building the world’s largest, most accessible, and insightful Telecom network. Our platform empowers anyone to spin up their own carrier from a browser, scaling and supporting you as you scale your network to millions of users.

We ensure that users and devices are connected, and stay connected wherever they go: Cross- country, carrier, or cellular technology. We help them pay less for mobile data. This technology is provided through our Carrier-as-a-Service platform: BrandVNO, a fully customizable telecom service. In addition, we enable clients of our service to extract the value from telecom data - enriching their customer experience, business intelligence, and product understanding in the many markets in which we operate.

Key responsibilities :
As part of the mobile core team, you will take care of our cloud mobile platform; you will have the following responsibilities:
- Configuration of STPs, DRAs, HLR/HSS, SMSC, SGSN, GGSN/PGW, SBC, etc. Along with the team, you will be responsible for being able to manage all equipment on our network.
- Using dashboards (and building new ones) to clearly and quickly discover issues and patterns
- Accountable and responsible to follow the communications procedures in place when handling an incident. Communication is both internal within our company and external to our third-party providers.
- Drive the implementation of telecom interconnection in relationship with our providers
- Maintenance, troubleshooting, security audits, and emergency response
- Wireshark tracing of critical infrastructure to debug issues
- Occasional on-call requirements

Key Qualifications
At least 10 years’ experience in the core network domain with a mobile networks
- Holding a BSc degree in Telecommunication or Computer Science (post-graduate studies are a bonus) 10+ years core telecommunications network experience
- 10+ years of experience with SS7, Sigtran, Diameter, Packet Switched (GGSN/PGw, GTP, GRX, IPX, etc.)
- Circuit switched communications protocols such as SS7 (including SCCP, TCAP, MAP and CAMEL phases 1 to 4), SCTP (SIGTRAN), Diameter, including ability to design and configure voice and messaging flows
Voice SIP / RTP, ISUP and voice convergence technologies, including IMS (including VoLTE and VoWiFi)Knowledge (general) in Voice Mail, IVR and PBX systems / softphones (secondary)
- Hands on with sniffers, Wireshark and testing tools in advanced mode
- Hands on with Linux/Unix based systems (you can find your way around a linux shell)
- Understanding of 3GPP, ITU-T and ANSI standards
- Understanding of roaming agreements and IR.21, including IREG testing
- Online Charging System (OCS) and CAMEL in billing and call control
- Strong writing and documentation skills are needed to develop reports
- Adaptability and responding to change
- Be able to work under pressure
- You are fluent in English (written and spoken)
- Ready to work on morning/afternoon shifts
- Good interaction with external customers and internal teams

Nice to have
- 2+ years scripting experience (Python, Bash, etc.)
Our culture and team

At OXIO, we put our people first. Some of our core values and approaches include:

- Creating a fun environment that empowers you
- Thinking about how to do things better, not how its been done
- Show up for your team, be early, don’t whine or complain without a solution (Pete Carrol) 
- Everything has a DRI (Directly Responsible Individual) – ownership and accountability matter
- OKR’s at the bottom should reflect OKR’s at the top
- Don’t get stressed about the future not happening fast enough: you alone can help change it
- You have the power to change one of the most important and dominant industries in modern times
- Management must lead by example with work ethic, empathy, and high expectations
- Our success is built on our unique and disruptive products, provided not only to our enterprise customers, but also to their own customer base
- We are a diverse and inclusive organisation that values diverse points of view and opinions. We believe in empowering individuals, but also realize that team collaboration drives our business forward
- OXIO has a strong technology centric culture, starting with our CEO who has led 2 startups in the space into successful exits.
- Our organization is distributed with Headquarters in New York City and offices in Montreal, Mexico City and Sao Paulo
- Being global and distributed, English fluency ensures we can all communicate, but we place importance on understanding and embracing cultural diversity.


- Be a sub-100 team member at a fast growing start-up
- Have a big impact relative to a small role in larger tech organization
- Mentorship and improvement opportunities
- Career path and growth in individual contributor (IC) tracks as well as management tracks
- Competitive healthcare benefits according to country
- Competitive compensation and a stock option incentive program to ensure long term alignment within the company
- International organization that enables you to work across boundaries, travel to different locations, and enjoy the dynamics of a rapidly growing startup