Senior DevOps Engineer

Railsr; City Of London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading fintech innovator is seeking a Senior DevOps Engineer to enhance AWS infrastructure and support engineering teams. The role involves managing CI/CD pipelines and implementing security measures within a collaborative environment. Ideal candidates will have AWS experience and strong scripting skills, contributing to a dynamic culture dedicated to innovation and inclusion.

Benefits

Competitive remuneration package

Generous benefits

Flexible working environment

Qualifications

• 2–5 years working with AWS services, ideally including Lambda, Fargate, Aurora.
• Hands-on experience with Terraform and/or Serverless Framework.
• Practical experience building CI/CD pipelines.

Responsibilities

• Operate and troubleshoot production systems in AWS.
• Maintain and improve CI/CD pipelines.
• Implement security best practices.

Skills

AWS services experience

Familiarity with Terraform

CI/CD pipelines with GitHub Actions

Debugging and scripting skills

Networking basics knowledge

Tools

Docker

Terraform

AWS CodeBuild

Job description

Senior Devops Engineer

About Railsr

In May 2025, Equals Money and Railsr, two established fintech innovators with complementary strengths, came together. This strategic merger unites Equals’ proven expertise in currency and payments with Railsr’s powerful embedded finance and card-issuing technology. Together, we’ve created a next-generation financial services platform with the scale, infrastructure, and agility to serve customers across industries and borders.

Backed by regulated infrastructure and advanced payments technology, we’re delivering seamless, scalable solutions with the personal service and trusted experience our customers rely on.

The Opportunity

We’re looking for a senior-level DevOps Engineer to join an existing team who will be hands-on running and improving our AWS platform, supporting engineering teams, and helping make our systems more secure and reliable. You’ll work primarily with Lambda, Fargate, Aurora, VPC and Security Hub, maintain IaC (Terraform, Serverless), and support CI/CD (GitHub Actions, CodeBuild/CodeDeploy). This is a practical, collaborative role — you’ll be solving day-to-day operational problems while helping plan and deliver longer-term improvements.

Your Responsibilities

• Operate and troubleshoot production and staging systems in AWS (Lambda, Fargate, Aurora, VPC).
• Maintain and improve CI/CD pipelines using GitHub Actions and AWS CodeBuild/CodeDeploy.
• Author and update Terraform and Serverless configs; review pull requests for infrastructure changes.
• Respond to incidents, follow runbooks, participate in root-cause analysis and implement fixes.
• Work with engineers to onboard services to the platform and provide practical guidance on deployments, observability and cost.
• Implement security best practices: IAM hygiene, Security Hub findings, secrets management and least-privilege changes.
• Build and tune monitoring, alerts, logging and tracing to reduce noise and catch real issues early.
• Automate repetitive tasks (backups, health checks, tidyups) and keep runbooks and docs current.

Your Profile

Attitude & Behaviours

• Collaborative team player who fits into an existing engineering team — shares knowledge, asks questions, and helps peers.
• Takes ownership for services they touch; pragmatic about shipping improvements incrementally.
• Comfortable learning on the job and seeking mentorship when needed.
• Communicates clearly and respectfully during incidents and in day-to-day work.
• Security- and reliability-minded: prefers small, testable changes that reduce risk.

Skills & Experience

• 2–5 years working with AWS services, ideally including Lambda, Fargate (or ECS), Aurora (or RDS), VPC and IAM.
• Hands-on experience with Terraform and/or Serverless Framework for infrastructure as code.
• Practical experience building CI/CD pipelines — GitHub Actions plus familiarity with CodeBuild/CodeDeploy or equivalents.
• Good debugging and scripting skills (Bash, Python, or similar) and comfort with containers/Docker.
• Familiarity with monitoring/observability tools (CloudWatch, X-Ray, or comparable) and writing meaningful alerts.
• Solid understanding of networking basics (subnets, security groups, routing, NAT) and security principles.
• Experience with incident response, postmortems and maintaining runbooks.
• Nice to have: AWS certifications (e.g., AWS Certified DevOps Engineer or Solutions Architect) and experience with cost optimisation and database ops for Aurora.

What we can offer you

• Purpose - Help make amazing embedded finance experiences accessible to everyone and transform global financial services.
• Career - Build your career in an innovative, adventurous and inclusive environment where everyone has the opportunity to make a difference and develop their skills.
• Reward - Competitive remuneration package with generous benefits and the potential to be rewarded with equity.
• People - Work with talented, passionate and supportive people from all over the world in a flexible, hybrid environment with trust and mutual respect at its heart.

Our Values

The environment at Railsr is fast-paced, exciting, and dynamic, underpinned by a clear set of values that drive a healthy and successful culture.

• Ambition - for our company, colleagues and ourselves and the freedom and expectation to own it.
• Trust - which we give freely and expect in return.
• Curiosity - with our minds open to fresh thinking in the constant pursuit of improvement.
• Customer Obsession - ensuring that everything we do is with the customer in mind, we succeed when they succeed.

If you are eager to join a fast-paced, collaborative and inclusive company and contribute to shaping its future, this is the role for you to make a difference.

Diversity, Inclusion & Belonging

Our global team is amazing, with over 150 colleagues spread across multiple countries and more than 15 languages spoken, we empower them to bring great ideas, drive new plans and help make Railsr a fantastic place to work. We’re proud of how well our diverse mix of people collaborate and are fully committed to continuing to make diversity, equity and inclusion part of everything we do.

Our flat structure encourages open communication, to ensure that all voices, opinions and ideas are heard and considered. At Railsr we’re all striving towards a common goal, and are passionate about creating an inclusive and rewarding working environment where everyone can be their best self.

Railsr is an equal opportunities employer and we actively encourage all applications. Whilst we strive to ensure our recruitment process is fully accessible to all applicants, please contact us on [e-mail] if you would like to discuss any specific requirements.