Senior Infrastructure Engineer

Over deze functie

Stream powers real-time Chat, Video, Activity Feeds, and AI Moderation for billions of end-users across thousands of apps, processing billions of API requests per month.

This is a full-time job opening based in Amsterdam, Toronto or remote in Europe/EU.

Hybrid policy: applicants based in the Netherlands or relocating here are expected to work in the office in Amsterdam 3 times per week. Exemptions may apply to specific cases.

Relocation and visa sponsorship is possible.

WHAT WILL YOU WORK ON

As a Senior Infrastructure Engineer, you join a small, senior platform team during a period of significant change: an AWS to GCP migration, a move to Kubernetes, and the relocation of 35-40 Postgres shards from managed RDS to self-hosted. This is a hands-on role: you will write code most of the time, own infrastructure decisions independently, and work without the support structures of a large organisation. Success looks like systems that scale predictably under load, cloud spend that falls per unit of traffic, and migrations that land without incident.

Job Responsibilities

- Design, build, and operate infrastructure for high-scale real-time systems handling millions of concurrent connections and billions of monthly API requests.

- Drive Kubernetes work end-to-end: cluster architecture, workload design, and migration of existing services, rather than operating clusters someone else designed.

- Contribute to the AWS-to-GCP migration, including re-architecting workloads for cost and performance rather than lifting and shifting.

- Own cost and efficiency optimisation across cloud infrastructure, identifying levers and measuring outcomes against real spend and utilisation data.

- Write production Go and Python: internal services, platform tooling, and automation that improve how product and SDK engineers deploy, observe, and debug.

- Lead post-migration tuning and capacity planning, closing the loop between architectural decisions and production behaviour.

- Partner with backend, video, and moderation engineers on system design, reliability targets, and tradeoffs that span service boundaries.

- Participate in on-call, incident response, and root cause analysis, turning findings into durable fixes rather than one-off patches.

ABOUT YOU

You have

- 5+ years in infrastructure, platform, DevOps, or SRE engineering, with clear depth in infrastructure over application development.

- Software engineering background: you have built systems, not only configured them. Production coding experience in Go or Python; scripting-only backgrounds are not a fit.

- Kubernetes experience at a meaningful production scale that goes beyond operations: you have driven cluster strategy, designed workloads, or led a migration.

- Demonstrated cloud cost or efficiency optimisation at scale, on AWS or GCP

- Direct experience running high-scale, high-load production systems.

- Strong cloud fundamentals of networking, compute, storage, IAM and the habit of asking why a system behaves as it does rather than accepting defaults.

- Hands-on in a small team: comfortable leading a project and reviewing a PR in the same week, without large-org support structures.

- Active use of AI tooling in your engineering workflow: applied adoption, not familiarity.

Bonus points

- Experience across both AWS and GCP; cloud migration experience between providers is a strong plus.

- Large-scale PostgreSQL knowledge: sharding, replication strategy, or partitioning tradeoffs, ideally self-hosted.

- Background with real-time systems — WebSockets, WebRTC, streaming, or persistent-connection workloads.

- Familiarity with the wider stack: CockroachDB, Redis, Terraform, and a Prometheus-based observability stack.

- Prior experience at an API-first or infrastructure-enabling scaleup.

OUR TECH STACK

At Stream, we use a wide collection of technologies to offer highly optimized and available features to our customers. Here is a shortlist of the technologies that we currently use:

- Go, gRPC, RocksDB, Python

- PostgreSQL, RabbitMQ

- GCP, Puppet

- Grafana, Graphite, ELK, Jaeger

- Redis, Memcached

- Claude Code, Cursor

WHY JOIN STREAM?

- History of success. From Amsterdam to Boulder and Techstars in-between, Stream has raised over $58.25M to build the best Chat Messaging & Activity Feed infrastructure available, with best-in-class support.

- Freedom and endless growth opportunities. As a rapidly growing startup (since 2020 we have gone from 30 to 150 employees), Stream gives you unique personal and professional growth opportunities. The opportunity of true ownership and accountability has a massive impact on your career. These are the things you can rarely experience in huge corporations.

- Be on the front line of progress and innovation. While working with cutting-edge technology, we are passionate about tackling difficult tech problems at scale and creating reusable components for them, empowering engineering teams to ship apps faster, more securely, and with a better user experience.

- They believe in us: Stream is backed by leading VC companies (Felicis Ventures, GGV Capital, 01.Advisors, Techstars, Arthur Ventures), including backers like Dick Costolo (01 Advisors, ex-CEO of Twitter), Olivier Pomel (CEO of Datadog), Tom Preston-Werner (Co-Founder of GitHub), Nicolas Dessaigne (Co-Founder of Algolia), Johnny Boufarhat (Founder and CEO of Hopin).

WHAT WE HAVE TO OFFER YOU

Stream employees enjoy some of the best job benefits in the industry:

- A team of exceptional engineers

- The chance to work on OSS projects

- 28 days paid time off plus paid Dutch holidays

- Company equity

- A pension scheme

- Hybrid work flexibility (3 days in-office)

- A Learning and Development budget

- Commute coverage: NS business card or a company bike

- Fitness stipend

- Bi-weekly in-office chair massages by a professional

- MacBook Pro and peripherals provided

- Healthy…