Senior Software Engineer (Developer Tooling)

TL;DR: We’re seeking a platform-minded software engineer to build and own the developer-facing tools that sit at the heart of how engineers integrate with Cloudsmith.

About Cloudsmith

Cloudsmith is building the operating system for the modern software supply chain.

We run a global, fully managed, multi-tenant SaaS platform that helps organizations, from startups to Fortune 500 companies, secure, govern, and distribute software artifacts at scale.

Worldwide, our customers use Cloudsmith as a critical infrastructure control plane for CI/CD, developer workflows, security controls, compliance, and software distribution, supporting 30+ formats and ecosystems across languages, containers, and operating systems.

We recently raised our Series C to accelerate Cloudsmith 2.0: deeper artifact intelligence, stronger policy and provenance, faster package-aware delivery, and infrastructure built for engineering teams, as well as the modern AI-driven software factory.

By developers, for developers: we care about craft, architecture, and enterprise scale.

The Role

In this role, you'll be responsible for building and maintaining the tools that many of our customers use every single day - in some cases, they're the only part of Cloudsmith that those engineers ever touch. That means the CLI, Terraform provider, MCP integration, IDE extensions, and more. These are durable, platform-grade interfaces that need to evolve carefully and responsibly alongside the core Cloudsmith platform - built to last, and owned for the long term.

You'll work closely with Customer Success, Solutions Engineering, and real external customers to make sure what you build reflects how developers actually work in the wild.

If you love building tools that other engineers rely on, think carefully about interface design and ergonomics, and get satisfaction from making complex things feel simple - this role is for you.

Key Responsibilities

- Build and maintain Cloudsmith's developer-facing integrations : including the CLI, Terraform provider, MCP server, and IDE/LSP extensions, treating them as first-class platform products.
- Design interfaces that stand the test of time: You'll think carefully about versioning, backwards compatibility, and the downstream impact of every change you ship, because thousands of engineers will have these tools embedded in their workflows.
- Own the full software development lifecycle for your work: from design and development through testing, release, and long-term support - aligned with Cloudsmith's engineering standards and practices.
- Stay close to the platform: You'll work in lockstep with the broader engineering organization to ensure developer tooling keeps pace with platform evolution, and surface any integration concerns early.
- Turn customer feedback into durable solutions: Working with Solutions Engineering and Customer Success as internal stakeholders, you'll translate real-world pain points into general-purpose tooling improvements that scale across the entire customer base.
- Champion developer experience: You'll bring strong opinions about what makes a CLI, SDK, or IDE plugin a joy to use, and advocate for the user - the software engineer - at every step.
- Contribute to a culture of automation: If something can be automated - testing, releases, validation, the works - you'll help make it so.

Required Experience, Qualities & Skills

- Experience: 3+ years of professional software engineering experience, with a track record of shipping and maintaining production-grade software.
- Strong API and interface design instincts: You understand the cost of a breaking change, know how to version things sensibly, and design with the consumer of your interface front of mind.
- Proficiency in at least one strongly-typed language: (Go, Python, TypeScript, or similar) and comfort picking up others as needed. Cloudsmith's CLI and tooling surface spans multiple languages and environments.
- Security awareness: You understand secure coding practices, and you're comfortable thinking about how credentials, tokens, and access patterns flow through the tools you build.
- Familiarity with CI/CD ecosystems and modern DevOps toolchains: the environments your tools will live in.
- Clear, confident written communication: You can write a well-reasoned RFC, a sensible changelog, and a README that developers actually read.
- A genuine empathy for other engineers as users: You've felt the frustration of a bad CLI or a confusing SDK, and you bring that lived experience into how you build.

Nice to have:

Hands-on experience building or contributing to developer-facing tooling - CLIs, SDKs, Terraform providers, language server protocols, IDE extensions, or similar. You don't need to have built all of these, but you should feel at home in this ecosystem.

Experience with AI-assisted development tools and workflows, and an interest in how they’re reshaping the way engineers build software.

Cultural Values We're Looking For

At Cloudsmith, our values shape how we make decisions every day. Here's what we mean by that in the context of this role:

Automate everything. We believe that if it can be automated, it should be. You'll apply this to your own work - releases, testing pipelines, validation - and help raise the bar for the whole team.

Collective ownership. You'll take responsibility for what you build long-term, respond when things break, and treat the entire platform as something you have a stake in - not just your corner of it.

Transparency. We share what's working and what isn't, openly. You'll be honest about tradeoffs, flag problems early, and communicate progress in a way that keeps stakeholders - internal and external - genuinely informed.

Bias for action. We believe in pragmatism first, perfection later. You'll know when to move quickly with a good solution rather than waiting for an ideal one, and you'll build the kind of instincts that make that call reliably.

Just better. We believe everything can and should be improved upon. You'll bring a continuous improvement mindset to your work - questioning defaults, proposing refinements, and raising the bar without being precious about it.

Customer collaboration. We stay close to the people who use what we build. You'll treat customer feedback as a genuine input to your work, and care deeply about the experience of the engineers on the other side of your tools.

Impact & Opportunity

This role offers the chance to directly shape the developer experience for one of the most critical layers in the software supply chain. As a member of a newly established squad with a clear mandate and growing capacity, you'll have meaningful influence over the tools, standards, and culture from day one. From startups to Fortune 500 companies, your work will directly impact how organizations control and secure their software supply chains.

Growth & Development

This is a foundational hire for a new squad, which means the growth ceiling is high. As the team matures and the scope of the roadmap expands, there is a clear pathway for growth.

For engineers who love the craft and want to go deeper, there's a natural progression toward a senior or staff engineering track - owning architectural decisions, mentoring newer engineers, and shaping the technical direction of developer tooling as a platform capability.

Benefits, Location & Work Environment

Note: You must be based in Ireland or the United Kingdom and have the right to work independently without requiring sponsorship.

Headlines

- A highly competitive compensation package, including pre-IPO equity.
- Comprehensive private healthcare plans.
- Generous annual leave and flexible working practices to suit your lifestyle.
- A professional development budget for conferences and training.
- Regular (monthly-ish) travel may be required for team meetings.
- Regular (quarterly-ish) travel may also be required for events and customers.

Health and Wellness

Regardless of your location, we deeply care about the health and wellness of our staff and their families; a sustainable pace is important to us. In addition to generous annual leave (PTO), we offer health and well-being benefits and flexible, family-friendly work policies.

Personal Growth

You will have an enormous opportunity to learn new skills alongside your colleagues, and your continued professional development is essential to us because it's important to you. We will support you with budgets for equipment, training, books, conferences, travel, and certifications. The more powerful you become, the better for all of us.

Facilities

Cloudsmith is headquartered in Belfast, Northern Ireland, with fully-equipped office space that’s open 24/7. We use our H.Q. regularly for activities like working sessions, team planning, meet-and-greets, and sometimes other group activities. We also hold company off-sites in Belfast twice a year, featuring guest speakers and team activities. Many Cloudsmithers work remotely, so we rely on our online collaboration tools; Slack, Google Docs, Linear, and other popular collaboration tools are how we work.

About Equal Opportunity

Cloudsmith is an equal opportunity employer, proud to nurture a diverse workplace that welcomes applications from individuals of all races, genders, and ethnic groups. We do not discriminate based on age, religion, sexual orientation, citizenship status, military service, or health conditions. We will not tolerate discrimination of any kind within our workforce.

The Final Word

We’re looking for someone who has a passion for their craft, a collaborative attitude, and a desire to build a product customers love. We are critical infrastructure built by developers for developers, and we are building the world’s software supply chain platform and ecosystem. We want to hear from you if you are excited to build the edge networking layer that powers software delivery at a global scale—balancing thoughtful design with real-world constraints—to leave a lasting impact on the software industry from today until IPO and beyond.