Infrastructure Engineer (Latency)

SellSig Inc.; Minnesota; On-site; USD 140,000 - 180,000; Full time

Job summary

Sellsig is building a fast, reliable streaming backbone for customer-facing coaching. We own the cloud infrastructure, from Supabase to Vercel, edge deployments, and the end-to-end delivery of live audio cues.

The team emphasizes latency, observability, and scalable operations across the US, EU, and APAC regions. Join us to own infrastructure and drive incident response with calm, methodical on-call practices.

Qualifications

• 5+ years in infrastructure, platform, SRE, or backend engineering.
• Deep experience with cloud platforms, serverless/edge, containers, and IaC.
• Track record cutting tail latency and running reliable, observable production systems.
• Strong in at least one backend language and comfortable across the stack.
• Calm, methodical approach to on-call and incidents.
• Postgres performance tuning at scale.
• SOC 2 / compliance-aware infrastructure experience.

Responsibilities

• Own and evolve our cloud infrastructure (Supabase, Vercel, edge/serverless) for latency and reliability.
• Build the streaming and queueing backbone that carries live audio and cues end to end.
• Set up observability — metrics, tracing, alerting — so latency and uptime regressions surface fast.
• Lead on regional data residency (US/EU/APAC), scaling, and incident response.
• Harden CI/CD and make safe, frequent deploys the default.

Skills

Cloud platforms

Serverless/edge

Containers

IaC

SRE / backend

Postgres tuning

On-call discipline

Tools

Supabase

Vercel

CI/CD tooling

Observability tooling

Job description

Own the infrastructure that makes sub-second coaching possible — the streaming backbone, regional deployment, observability, and the reliability bar for a product reps depend on live, in front of customers. Speed and uptime are the feature.

What you'll do

• Own and evolve our cloud infrastructure (Supabase, Vercel, edge/serverless) for latency and reliability.
• Build the streaming and queueing backbone that carries live audio and cues end to end.
• Set up observability — metrics, tracing, alerting — so latency and uptime regressions surface fast.
• Lead on regional data residency (US/EU/APAC), scaling, and incident response.
• Harden CI/CD and make safe, frequent deploys the default.

What we're looking for

• 5+ years in infrastructure, platform, SRE, or backend engineering.
• Deep experience with cloud platforms, serverless/edge, containers, and IaC.
• Track record cutting tail latency and running reliable, observable production systems.
• Strong in at least one backend language and comfortable across the stack.
• Calm, methodical approach to on-call and incidents.
• Postgres performance tuning at scale.
• SOC 2 / compliance-aware infrastructure experience.