Senior Software Engineer

Lorien; Greater London; Hybrid; GBP 60,000 - 93,000; Full time

Benefits offered by this job

Bonus scheme

Job summary

Lorien is seeking a Senior Software Engineer in London to join a growing team. The role focuses on designing, building and supporting cloud-native solutions on AWS with a strong emphasis on ownership and end-to-end delivery.

The candidate will work primarily in the UK time zone, collaborating with stakeholders and engineering peers to produce reliable, scalable systems. The role is hybrid, with two days on site.

Qualifications

• Strong AWS expertise with production experience.
• Ability to own technical delivery end-to-end.
• Experience collaborating with Product Owners and Architects.
• Independent work within UK business hours.

Responsibilities

• Design, build, and support cloud-native applications on AWS.
• Own technical delivery from discovery through implementation and support.
• Collaborate with Product Owners, BAs, Architects and engineers to shape solutions.
• Contribute to architecture across distributed systems and event-driven setups.
• Build Infrastructure as Code using AWS CDK and other IaC tools.
• Improve reliability, scalability, observability, and efficiency.
• Mentor engineers and drive pragmatic, business-aligned solutions.

Skills

AWS

Infrastructure as Code

End-to-end delivery

Stakeholder communication

Independent work

Tools

AWS CDK

Terraform

Job description

Full Time - London - Hybrid - Two days a week on site

Up to £93k with a 15% bonus.

Overview

We're looking for a Senior Software Engineer to join a growing engineering team, focused on designing, building, and supporting cloud-native solutions on AWS

This role is ideal for a strong Senior Individual Contributor who enjoys owning technical delivery end-to-end, working closely with stakeholders, and driving solutions from concept through to production.

The successful candidate will operate as the primary engineering presence in the UK time zone, making strong communication, ownership, and accountability essential

While software engineering experience is important, the specific language or runtime is less critical than deep AWS knowledge, Infrastructure as Code experience, and the ability to operate independently

Responsibilities

Design, build, and support cloud-native applications and services on AWS

• Own technical delivery from discovery and solution design through implementation, deployment, and ongoing support
• Work closely with Product Owners, Business Analysts, Architects, and Engineering teams to shape solutions and refine requirements
• Contribute to architectural decisions across distributed and event-driven systems
• Build and maintain Infrastructure as Code using AWS CDK and other IaC tools
• Improve system reliability, scalability, observability, and operational efficiency
• Act as a trusted technical partner for stakeholders during UK business hours
• Support production systems, incident response, and continuous improvement activities
• Mentor engineers through technical guidance and best-practice sharing
• Drive pragmatic solutions that balance business needs and technical excellence

AWS Expertise

Strong hands-on experience with AWS services such as

• LambdaAPI
• Gateway Event Bridge
• SQS
• SNS
• Dynamo
• DBCloud
• WatchIAM
• Step Functions
• ECS / Fargate
• Infrastructure as C
• odeAWS CDK (highly desirable)
• TerraformCloud
• Formation Infrastructure automation and deployment pipelines
• Distributed systems
• Event-driven architectures
• MicroservicesAPI design and integrations
• Monitoring and observability
• Resilience and fault tolerance
• Strong ownership mindset
• Experience operating as a Senior Individual ContributorAgile delivery experience

What We're Looking For

We're particularly interested in engineers who can demonstrate:

• Ownership and accountability for technical delivery
• AWS CDK experience
• Confidence working directly with stakeholders
• The ability to influence technical decisions without formal management responsibility

Nice to Have

• Financial Services, Insurance, or other regulated industry experience
• Experience with AI-assisted engineeringtools
• Experience with Amazon Bedrock, MCP, or modern AI platforms
• Experience leading cloud migrations or platform modernisation initiatives