Platform Engineer

Platform Engineer

STS Digital (stsdigital.io) is a leading regulated digital asset trading firm specialising in OTC trading and market making. While trading is headquartered in Bermuda, technology development is provided by a vibrant global technology team.

We are seeking a Platform Engineer to join the Platform team. This role owns and operates the core cloud infrastructure, developer tooling, and automation that underpin the company's engineering operations. It's a hands-on engineering role — you'll build and run infrastructure as code, improve CI/CD and developer experience, eliminate operational toil through automation, and help the team put AI/LLM tooling to work across our platforms and workflows. You'll play a key part in maintaining the reliability, security, and scalability of a mission-critical trading platform.

The role reports to the Platform Team Lead. English is the company language.

Responsibilities

• Build, operate, and maintain cloud infrastructure across AWS (EKS, EC2, networking, IAM).
• Develop and maintain Infrastructure as Code (Terraform), configuration management, and environment automation.
• Build and improve CI/CD pipelines and deployment workflows in collaboration with engineering teams.
• Own system monitoring, logging, alerting, and operational health checks.
• Participate in incident response, troubleshooting, and remediation.
• Write and maintain tooling, automation, and internal services to improve reliability and developer experience.
• Identify and eliminate operational toil through code rather than manual process.
• Use AI/LLM tooling to accelerate engineering work and integrate it into internal platforms and workflows where it adds value.
• Apply security best practices across infrastructure, and support patching, access reviews, and operational controls.
• Maintain documentation, runbooks, and platform standards to support reliability and consistency.

Qualifications & Experience

Essential

• 5+ years' total experience in software engineering.
• Of these, 3+ years in a Platform, SRE, or Infrastructure Engineering role, with demonstrated ability to own and drive work independently (scope problems, make decisions, deliver with minimal oversight).
• Hands-on production experience with Kubernetes and containerised workloads (deploying, operating, and troubleshooting, not just familiarity).
• Strong AWS experience across core services (EKS, EC2, networking, IAM).
• Practical Infrastructure as Code experience with Terraform.
• Experience building and maintaining CI/CD pipelines — GitHub Actions preferred, or equivalent (GitLab CI, Jenkins, etc.).
• Real, demonstrable coding ability — able to write, read, and maintain non-trivial code, not just glue scripts. (Go, .NET/C#, or Python a strong bonus.)
• Comfortable using AI tools in day-to-day engineering work (coding assistants, agentic workflows, etc.) and doing so effectively.
• Strong troubleshooting skills and a pragmatic, service-oriented mindset.
• Fluent in English, both written and spoken.

Desirable

• Working knowledge of AI/LLM tooling beyond end-user consumption — e.g. building or integrating with LLM APIs, agent frameworks, RAG pipelines, MCP servers, prompt/eval tooling, or self-hosted model infrastructure.
• Exposure to SRE practices: monitoring, logging, alerting, and incident management.
• Knowledge of security fundamentals in cloud and enterprise environments.
• Experience supporting fast-paced engineering or financial services / trading teams.
• Some exposure to corporate IT / end-user systems (Office 365, Entra, identity and access management) — occasional support of these is part of the role, but it's a small slice, not the focus.

Our Tech Stack

• Infrastructure: AWS (EKS, EC2), Terraform
• CI/CD & Version Control: GitHub, GitHub Actions
• Backend: C#, Python
• Frontend: React
• Databases: PostgreSQL, DynamoDB

Why Join Us

This role offers the opportunity to work on the core infrastructure and systems that underpin a mission-critical digital asset trading platform. You will collaborate closely with engineering, trading, and security teams, gain deep exposure to cloud infrastructure and modern AI-enabled engineering practices, and play a key role in ensuring the reliability, security, and scalability of a growing technology organisation.