Senior Software Engineer; Platform

TL;

DR:
We are looking for a collaborative engineer with a bias for action and a strong focus on delivering customer value. If you are motivated to solve complex systems problems across infrastructure, platform reliability, and backend software, and thrive in an environment where no two weeks look the same, you will find a supportive home at Cloudsmith.

Cloudsmith is transforming how organisations handle software artifacts and secure their supply chains. As a cloud native, multi-tenant platform, we enable organisations to build software better, through best-in-class artifact management and software supply chain security. Our vision is to become the software supply chain itself, powering the future of software delivery.

We are the world's most potent artifact management platform, built by developers for developers. Our platform supports over 30 formats spanning languages, container formats, and operating systems, with enterprise-grade features, including vulnerability and security scanning, world-class policy management and enforcement, and web-scale to handle the Fortune 500. Organizations integrate Cloudsmith as critical infrastructure into their development, deployment, and distribution pipelines, trusting us to protect and accelerate, regardless of scale.

Backed by top-tier investors and on a trajectory toward IPO and beyond, we're building mission‑critical infrastructure that powers software delivery for organisations worldwide. We operate at the cutting edge of cloud‑native technology, tackling complex distributed systems challenges that directly impact millions of developers. Now is an exciting time to join us as we revolutionise how organisations deliver and secure software and help write the next chapter of our rocketship growth story.

As a Senior Software Engineer on the Core Platform team, you'll work across the systems that keep Cloudsmith fast, reliable, and scalable for our global customer base. This is a broad, high‑impact role that sits at the intersection of infrastructure and software engineering. You'll be as comfortable tuning a slow database query or diagnosing a production incident as you are designing and shipping a new platform capability.

You'll need good instincts, strong technical judgement, and the ability to move with confidence in ambiguous situations.

We are one of four engineering teams responsible for building application capabilities and the underlying platform upon which Cloudsmith is founded. We operate in a highly collaborative environment, where people with different skills come together to make things happen. We each contribute to an environment where curiosity, support, transparency, and bias for action reign. We have a modern CI/CD approach, deploying several times per day, and we support a global set of customers who are engineers like us.

The Platform team is cross‑cutting by nature. You won't own a single service in isolation. Instead, you'll work across layers of the stack, from AWS infrastructure through to backend application code, tackling problems that don't always have a well‑worn path. One week might involve investigating a performance regression affecting an enterprise customer; the next, designing changes to how our platform handles authentication or billing at scale.

This is a rare opportunity to work on systems that matter — mission‑critical infrastructure used by some of the world's most demanding engineering organisations — alongside a small, senior team that takes pride in doing things well.

We are cloud‑native, born in AWS, and embrace their services across our platform. Our technology stack includes Python, Django, React, NextJS, ECS, Postgres, Clickhouse, Kinesis, Cloudfront, Flink, Elastic Search, Lambda, Amazon

MQ & Terraform. Tooling includes VS Code, Slack, Linear, Datadog, Notion, Circle

CI & Spacelift.

• Build: Design, build, and ship new features and optimisations for our platform infrastructure

• Resilience: Help keep our systems fast, reliable, and running smoothly at a global scale.

• Collaborate: Work closely with teammates from product, design, and customer success…