Summary: Sateliot is seeking a Senior Protocol Stack & Network Automation Engineer to define, evolve, and operate the end-to-end protocol stack connecting space links/RF ground systems, ground stations, and terrestrial + cloud networks. Highlights: 1. Opportunity to work in the challenging New Space & Telecommunication sector 2. Be part of a fast-growing startup with a global reach 3. Join a driven team passionate about continuous learning and professional growth **WHO ARE WE?** Sateliot is a Barcelona\-based Startup in the New Space sector, becoming the **first satellite telecommunications operator** that will provide **global and continuous connectivity** to all the elements that will make up the massive Internet of Things **(IoT) universe under the 5G protocol**. In order to do so, Sateliot is launching a **constellation of last generation nanosatellites**, located at low altitude that act as mobile towers. Sateliot is the perfect complement for large telecommunications companies by providing them with the necessary infrastructure where terrestrial technologies do not arrive. **YOUR MISSION** We’re looking for a Senior Protocol Stack \& Network Automation Engineer to define, evolve, and operate the end\-to\-end protocol stack connecting space links/RF ground systems, ground stations, and terrestrial \+ cloud networks. This role is for someone with exceptionally strong networking fundamentals (from first principles), hands\-on space/RF protocol stack experience, and a maker mindset—someone who loves building lab setups, validating assumptions, and turning complex networking/protocol problems into repeatable, automated solutions **YOUR MAIN FUNCTIONS** ###### **Own the Space Ground IP protocol stack (core accountability)** * **Define and document the protocol stack across space links, ground systems, ground station networks, and IP/cloud environments.** * **Work hands\-on with space protocol stacks and their operational implications, including CCSDS\-based stacks (e.g., AOS, PUS) and DVB\-S2 with ground\-segment adaptation (e.g., GSE or equivalent patterns used in real systems).** * **Design and implement approaches to map / bridge / encapsulate / translate between stacks and networking domains (space ground station IP), including constraints like MTU/fragmentation, latency/jitter, loss, ordering, and retransmission behavior.** * **Partner with Ground/Space/Software teams to ensure protocol choices are implementable, testable, and operable.** ###### **Build and operate reliable networks (vendor\-agnostic)** * **Design and operate routing, segmentation, and secure connectivity across the full path.** * **Own core network domains:** + **Routing: BGP, routing policy, convergence/failure modes** + **Switching: VLANs, L2/L3 boundaries, redundancy patterns, Spanning Tree and loop prevention** + **Security: firewalls, NAT, ACLs, segmentation, VPN concepts (as needed)** + **Troubleshooting: packet/flow\-level analysis, asymmetric routing, MTU issues, misconfigurations, performance anomalies** * **Confidently trace end\-to\-end flows across ground infrastructure cloud, explaining what each hop/layer is doing and why.** ###### **Automation\-first, maker\-driven delivery** * **Replace manual processes with automation: config\-as\-code, templating, validation checks, rollout/rollback workflows, drift detection.** * **Build labs to reproduce issues and validate protocol\-stack changes before rollout.** * **Produce clear docs/runbooks and raise the operational bar through repeatability and guardrails.** **REQUIREMENTS** * Space protocol stack experience (required): proven ability to work with and reason about space protocol stacks such as CCSDS\-based stacks (AOS, PUS), and to translate/bridge those into IP networking environments. * Deep networking fundamentals with hands\-on experience configuring and troubleshooting real networks (vendor\-agnostic). * Strong working knowledge of BGP, switching \+ STP, firewalls, NAT, and practical troubleshooting. * Automation mindset: you actively avoid repetitive manual work and build repeatable workflows (scripts, pipelines, config validation, etc.). * Maker mentality: you enjoy building labs, experimenting, and proving designs with real setups. **NICE TO HAVE** * **AWS networking knowledge: Transit Gateway, complex multi\-account routing, route propagation strategies, hybrid connectivity patterns at scale.** * **Programming/scripting: Python preferred (or equivalent). The ability to read code comfortably is a big plus.** * **Infrastructure/network automation tooling (e.g., Terraform/Ansible), CI/CD for network changes, automated tests/verification.** * **Network observability experience (logs/metrics/traces) and building actionable dashboards/alerts.** **WHAT YOU’LL FIND WHEN WORKING AT SATELIOT:** You will be part of one the fastest\-growing start\-ups in Spain with global reach along getting into the challenging world of New Space \& Telecommunication. Our culture is based on embracing openness by welcoming multicultural talent, being respectful with everybody and being open to exchange ideas. We are also committed to a healthy lifestyle by helping our team balance their work and personal life and also by providing them facilities for healthy habits. We are a driven team with big goals, that seek for people who are genuinely passionate about their work and that also want to keep learning and getting better personally and professionally! **WHAT DO WE OFFER?** * Full time permanent Contract * Hybrid Work Model * Schedule flexibility * Flat and transparent organizational structure * Buddy Program to help you with your integration during your first month * Flexible compensation package: Tax benefits with ticket restaurant, transportation and kindergarten, training programs. * We promote good physical and mental health, with a Health insurance, Fresh fruit in the office and the possibility of sharing the cost of bicycle transport or gyms. * Work in a dynamic, multidisciplinary and multicultural environment that will allow you to boost your professional career * To be part of a strong, international, friendly and motivated team, where you can progress both personal and professionally * The chance to be part of one of the most exciting and disruptive space projects in Europe