S Software Engineer, Networking (Agent Infra) San Francisco (Remote), CA, US Mid Go Rust C++

ContentBuffer; San Francisco (CA); Remote; USD 140,000 - 180,000; Full time

Benefits offered by this job

Equity

Medical insurance

Flexible PTO

Parental leave

401(k)

Job summary

Baseten is seeking an experienced Software Engineer, Networking (Agent Infra) to design and implement a user-space, VPP-based data plane that connects microVM sandboxes with Baseten services and the internet. You will build multi-tenant overlays across regions, expose the network as a programmable API, and push latency and scalability to the next level.

You’ll work on TLS termination, ingress/egress controls, and L7 proxies while owning sandbox addressing, isolation, and comprehensive

Qualifications

• Production code in Rust, Go, or C/C++.
• Experience with user-space packet processing (DPDK/VPP) or VNF/NFV.
• Experience building multi-tenant networking in production.
• Strong TCP/IP and routing fundamentals.

Responsibilities

• Design and build the user-space, VPP-based data plane connecting microVM sandboxes and Baseten services.
• Develop multi-tenant overlays (EVPN, GENEVE, VXLAN) across regions.
• Expose the network as a programmable API used by the platform.
• Reduce latency and scale agent-to-agent and agent-to-service traffic.
• Build secure ingress/egress, firewalls, and TLS domains.
• Create per-sandbox addressing including IPv6 and network isolation.
• Develop observability for packet paths and end-to-end debugging.
• Collaborate with compute, storage, GPU infra, and datacenter teams.

Skills

Rust/Go/C/C++

Systems programming

TCP/IP routing

Multi-tenant networking

Tools

DPDK

VPP/FD.io

VNF/NFV

Job description

# Software Engineer, Networking (Agent Infra)Full Time computer Remote location\\_on San Francisco (Remote), CA, US Midopen\\_in\\_new Apply on site Opens in a new tab on website.## Job DescriptionABOUT BASETENBaseten powers mission-critical inference for the world's most dynamic AI companies, like Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma, and Writer. By uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing quickly and recently raised our $1.5B Series F https://www.baseten.co/blog/announcing-our-series-f/, led by Altimeter Capital, Conviction Partners, and Spark Capital. Join us and help build the platform engineers turn to ship AI products.THE ROLEEvery agent on Baseten Sandboxes runs in its own microVM. Agents call models, reach tools and APIs, expose services, and more and more often talk to each other. Networking built into today's cloud providers was not designed for very large numbers of isolated machines that suspend, resume, and exchange data constantly.The Agent Infra team builds its own networking stack for sandboxes, designed from the start for that scale. It runs in user space, with VPP (FD.io http://FD.io) as its main data plane technology, and is built from virtualized network functions (VNF/NFV): carrier-grade, low-latency packet processing designed for very large numbers of agents. In September 2026, Baseten acquired Blaxel https://www.baseten.co/blog/blaxel-is-joining-baseten-to-build-the-future-of-agentic-cloud/, whose sandboxes, storage, and networking are the foundation for Baseten Sandboxes https://docs.baseten.co/sandboxes.You'll build multi-tenant virtual private networking that connects each customer's agents and services privately and securely, using modern overlay technologies.We are building a cloud, not just using one. We want engineers who expose the network as a programmable API and write the code, not operators who push router and switch configuration. The team is small and ownership is big: we ship in weeks and months, not multi-year programs.This role is separate from Baseten's GPU-to-GPU networking. Here you'll own how sandboxes connect to each other, to Baseten services, to customer networks, and to the internet.If you've built user-space data planes, virtualized network functions, or multi-tenant cloud networking and want to design one for agents, we'd love to talk.EXAMPLE INITIATIVES- Blaxel is joining Baseten to build the future of agentic infrastructure https://www.baseten.co/blog/blaxel-is-joining-baseten-to-build-the-future-of-agentic-cloud/- Securing the open frontier with NVIDIA OpenShell and Blaxel sandboxes https://www.baseten.co/blog/announcing-carbon/- Baseten Sandboxes documentation https://docs.baseten.co/sandboxesRESPONSIBILITIES- Design and build the user-space, VPP-based data plane that connects microVM sandboxes to each other, to Baseten services, and to the internet- Build multi-tenant virtual private networking and overlays (for example EVPN, GENEVE, VXLAN) across regions- Expose the network as a programmable API that the rest of the platform calls- Cut latency and raise connection scale for agent-to-agent and agent-to-service traffic- Build routing that sends each request to the nearest region and keeps connections working as sandboxes suspend and resume- Build secure ingress and egress for sandboxes, including firewalling, static egress IPs, and custom domains with managed TLS- Build L7 proxies for request inspection, filtering, secret injection, and auditing- Own per-sandbox addressing, including IPv6, and network isolation between tenants- Build observability for the packet path across guest, host, and network, and debug production issues end to end- Work closely with the compute, storage, GPU infrastructure, and datacenter teamsREQUIREMENTS- Experience with user-space packet processing (DPDK, VPP, or similar) or virtualized network functions (VNF/NFV)- Experience building multi-tenant networking in production (VXLAN, GENEVE, VRF)- Experience building a software-defined network, overlay network, or packet-processing data plane in production- You write production code: strong systems programming in Rust, Go, and/or C/C++. Network architects are welcome if they build, not only configure- Experience building cloud networking as the provider, not only consuming a cloud provider's network- Solid grounding in TCP/IP and routing- Experience building or operating proxies, load balancers, or L4/L7 gateways at scale- Experience debugging latency and throughput problems with packet captures, tracing, and profiling- You move fast and like owning a problem end to end on a small teamNICE TO HAVE- Experience with VPP / FD.io http://FD.io, our main networking technology- Experience with GENEVE or VXLAN overlays and EVPN- Linux kernel networking: eBPF/XDP, netfilter or nftables, network namespaces- Familiarity with virtual machine networking: virtio-net, vhost, TAP devices, or networking for Firecracker or Cloud Hypervisor- Experience running IPv6 at scale- Background in telecom user-plane or 5G core networking, or in low-latency trading networks- Experience with multi-region traffic routing, anycast, or BGP- Experience with TLS termination, DNS, and egress security controlsBENEFITS- Competitive compensation, including meaningful equity- (U.S. only) 100% coverage of medical, dental, and vision insurance for employee and dependents- Flexible PTO policy including company wide Winter Break (our offices are closed from Christmas Eve to New Year's Day!)- Paid parental leave- Fertility and family-building stipend through Carrot- (U.S. only) Company-facilitated 401(k)- Exposure to a variety of ML startups, offering unparalleled learning and networking opportunities.Apply now to embark on a rewarding journey in shaping the future of AI! If you are a motivated individual with a passion for machine learning and a desire to be part of a collaborative