Senior Engineer: AWS Serverless & MongoDB Specialist

LegalAndGeneral; Wales; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Bonus plan

Share schemes

Pension

Life assurance

Healthcare

Holiday entitlement

Family leave

Electric car scheme

Employee discounts

Sustainable offices

Job summary

Legal & General is seeking a highly skilled Senior Software Engineer to design, build, and evolve cloud-native platforms. You will own end-to-end delivery of high‑quality software, with a strong emphasis on AWS serverless technologies and MongoDB.

You’ll shape technical direction, reduce complexity and debt, and continuously improve how we engineer, deliver, and operate services in an Agile environment. Mentoring engineers and collaborating with stakeholders are key parts of the role.

Qualifications

• Strong expertise in modern software engineering, including clean code, clean architecture, design patterns, distributed systems, microservices, and cloud-native application design.
• Proven experience delivering serverless solutions on AWS, with hands-on use of services such as Lambda, API Gateway, ECS, and infrastructure-as-code using CloudFormation and serverless frameworks.
• Deep, practical experience with MongoDB, including schema design, performance optimisation, and advanced aggregation pipelines, alongside a solid understanding of SQL and other NoSQL data stores.
• Extensive experience building and maintaining large-scale systems using TDD, automated testing, CI/CD pipelines, and containerisation, with a clear emphasis on reliability and operational excellence.
• A strong security-first mindset, with real-world experience in secure application development, web and API security, threat modelling, and compliance in cloud environments.
• Demonstrated ability to solve complex technical problems, make sound architectural decisions, navigate ambiguity, and balance immediate delivery needs with long-term system health.
• Significant experience working in Agile environments (Scrum, Kanban), contributing to effective planning, prioritisation, dependency management, and continuous improvement across teams.
• A natural technical leader and communicator who can mentor others, facilitate technical discussions, collaborate effectively with non-technical stakeholders, and positively influence team culture and outcomes.

Responsibilities

• Own the design and delivery of high-quality software across features and services.
• Building and operating cloud-native, serverless applications on AWS with security and performance in mind.
• Lead by example with clean code and architectural best practices.
• Identify and address technical debt to improve maintainability and operability.
• Define and influence test strategies focusing on security, accessibility, usability, resilience.
• Perform and lead code reviews to improve design and quality.
• Drive continuous improvement in processes, tooling, and ways of working.
• Mentor engineers and promote collaboration and knowledge sharing.
• Keep pace with emerging cloud and data technologies and share insights.
• Ensure solutions support fair customer outcomes aligned with policies.

Skills

Cloud-native design

Serverless architecture

Security-first mindset

Agile teamwork

Tools

MongoDB

AWS (Lambda, API Gateway, ECS)

CloudFormation

Serverless frameworks

CI/CD

Docker/Kubernetes

Job description

Legal & General is seeking a highly skilled Senior Software Engineer to design, build, and evolve cloud-native platforms. You will own end-to-end delivery of high‑quality software, with a strong emphasis on AWS serverless technologies and MongoDB.

You’ll shape technical direction, reduce complexity and debt, and continuously improve how we engineer, deliver, and operate services in an Agile environment. Mentoring engineers and collaborating with stakeholders are key parts of the role.