Senior Packet Core Engineer

United States /
Technology – Telecom /
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.

As part of the Engineering Telecom Group and reporting to the Head of Telecom, your primary responsibility will be the design, deployment, configuration and maintenance of 2G/3G/4G/5G core network elements, such as STP/DRA, IWF, HLR, HSS, MME, PGW, SGW, IWF, OCS, PCRF, etc. You will also learn and be exposed to the API and HTTP side of our product (called BrandVNO) as well as our Business Intelligence product (BrandIQ) which marries our modern telecom stack with an amazing user experience for packing mobility services into our customers’ core product simply by using our API’s.

Key responsibilities :

    • To act as a Subject Matter Expert (SME) in all 3G/4G/5G mobile Packet Switched (PS) network elements like PGW, GGSN, MME, ePDG, SGSN and other Packet Core elements.
    • Making recommendations for improvements in all aspects of the core functions and elements.
    • Configuration and software version management of the assigned mobile core network elements.
    • Supporting management of the relevant mobile core network element vendors.
    • Supporting Roaming & Carrier Relations to implement new roaming and wholesale implementation, including IREG testing.
    • Providing support to Pre-Sales (Solution Architects) through peer-review of proposed solutions to customer.
    • Working with Solution Architects and the Head of Telecom to work into High Level Design (HLD) documentation.
    • Convert HLD into LLD and specific core element changes to implement customer specific solution.
    • Support the Network Operations Centre (NOC) with live wholesale customer support, including both proactive and reactive identification / troubleshooting and resolution of issues of packet core issues.
    • Developing skills and expertise across the infrastructure components and new technologies.

Key Qualifications

    • Bachelors or Master’s degree in Computer Science or Engineering.
    • Minimum of 5-8 years working in the telecommunications industry designing, integrating and managing Packet Switched network propositions for e.g. a NEP or carrier / MNO / MVNO.
    • Minimum of three years of systems integration, management and/or technical support of mobile core network components.
    • Demonstrable experience of managing & configuring Packet Switched network elements including GGSN, P-GW, SGSN, S-GW, PCRF & MME.
    • Circuit Switched (CS) network elements, interfaces and messaging for both 3G/WCDMA and 4G/LTE networks, including IMS CSFB and PCRF.
    • Voice SIP / RTP, ISUP and voice convergence technologies, including IMS (including VoLTE and VoWiFi).
    • IP networking, including IPv4 and IPv6, VPN IPSec and Point-to-Point (e.g. to CCNA standard).
    • In-depth knowledge of data core network architecture (including MNO and MVNO / MVNE infrastructure architecture) as well as network topology, including ability to describe the key elements of a mobile network and understand how the components function and interact as well as how mobile data sessions work.
    • Experience of capacity management and dimensioning of all Packet Core network nodes
    • Be able to derive call flows and interactions of each core element as required by each customer solution.
    • In-depth understanding of 3GPP, ITU-T and ANSI standards.
    • Understanding of roaming agreements and IR.21, including IREG testing.
    • RADIUS and Diameter for both signalling and charging scenarios.
    • Trouble shooting and fault detection. Proactive and preventative maintenance.
    • IP and SS7 network security.
    • Familiarity with BSS platforms and provisioning systems.
    • Successful track record of designing compelling technical solutions based on commercial needs of the customers.

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