Founding Engineer

Harrington Starr; España; Hybrid; EUR 65,000 - 95,000; Full time

Job summary

Harrington Starr is scouting a Software/Infrastructure Engineer in Spain to own both software development and cloud infrastructure. You will build tooling in Python, deploy AWS resources and shape the architecture while working in a genuinely hybrid startup setting.

You'll take ownership of the environment, improve reliability and performance, and implement CI/CD pipelines. The role suits someone who enjoys hands-on coding as well as designing scalable systems.

Qualifications

• 3–7 years of experience across software engineering, cloud infrastructure or DevOps.
• Hands-on experience with AWS infrastructure and networking.
• Strong Python skills and automation mindset.
• Comfortable working independently and taking ownership.

Responsibilities

• Build Python-based tooling to improve infrastructure operations.
• Design, deploy and manage AWS infrastructure (EC2, VPC, S3, IAM, ECS/EKS).
• Own AWS networking (routing, VPC Peering, Transit Gateway, VPNs, Direct Connect).
• Improve system reliability, scalability, monitoring and performance.
• Build and maintain CI/CD workflows and deployment automation.
• Troubleshoot Linux, cloud infra and networking issues.

Skills

Python

AWS

DevOps

Cloud infrastructure

Tools

Jenkins

GitLab CI

Job description

Software/Infrastructure Engineer | Python / AWS / Crypto | Trading Technology

I'm working with a start-up crypto technology business looking to hire a hands-on engineer who enjoys working across both software development and infrastructure.

What makes this opportunity particularly interesting is that you'll be the dedicated engineer responsible for this area within the team.

Rather than joining an established function, you'll have the opportunity to take ownership of the environment in which you will develop and build tooling, and help shape how these systems are built and operated.

It's a genuinely hybrid position, ideal for someone who enjoys writing code just as much as getting into the detail of cloud architecture, Linux, networking and system performance.

What you'll be working on:

• Building Python-based code to improve infrastructure operations and engineering workflows.
• Designing, deploying and managing AWS infrastructure across EC2, VPC, S3, IAM, ECS/EKS and related services.
• Taking ownership of AWS networking, including routing, VPC Peering, Transit Gateway, VPNs and Direct Connect.
• Improving system reliability, scalability, monitoring and overall infrastructure performance.
• Building and maintaining CI/CD workflows and deployment automation.
• Troubleshooting complex Linux, cloud infrastructure and networking issues.

What we're looking for:

• 3–7 years of experience across software engineering, cloud infrastructure or DevOps.
• Someone who is comfortable being hire number 3 for this start-up.
• Strong Python skills and a genuine interest in building automation.
• Hands-on experience with AWS infrastructure and networking.
• Strong Linux knowledge and confidence troubleshooting production systems.
• Familiarity with CI/CD tools such as Jenkins or GitLab CI.
• Someone comfortable working independently, taking ownership and making technical decisions.

Nice to have:

• Experience within trading, financial services or digital assets.
• Exposure to low-latency or high-performance environments.
• A background combining software development and infrastructure engineering.

Why this role?

You’ll be the go-to engineer for this area of the business, with the autonomy to take ownership, solve challenging technical problems and work across both software and infrastructure.

It’s a great opportunity for someone who enjoys variety, wants to make a visible technical impact and doesn’t want to be limited to a traditional software engineering or DevOps remit.