Senior C# Engineer - AWS Serverless Services, APIs, Event Driven

Smart Sourcer Limited City of London (EC1A) Permanent Published: 6 hours ago From £75,000 to £80,000 per annum + bonus + benefits

Charing Cross, United Kingdom

2 days ago

Role details

Contract type

Permanent contract

Employment type

Full-time (> 32 hours)

Working hours

Regular working hours

Languages

English

Experience level

Senior

Compensation

£ 80K

Job location

Remote

Charing Cross, United Kingdom

Tech stack

API

Amazon Web Services (AWS)

C Sharp (Programming Language)

Cloud Computing

Continuous Integration

Relational Databases

DevOps

Distributed Systems

Event-Driven Programming

Github

MySQL

Nunit

OAuth

Secure Coding

Software Engineering

Amazon Web Services (AWS)

.NET Core

Grafana

State Machines

Technical Debt

Backend

Integration Tests

Amazon Web Services (AWS)

Functional Programming

Cloudwatch

Api Gateway

Software Coding

REST

Amazon Web Services (AWS)

Terraform

Serverless Computing

Docker

Microservices

Job description

Designing and developing scalable, high-performance REST APIs and microservices using C# and .NET Core.
Building cloud-native applications using AWS services such as Lambda, API Gateway, and S3.
Collaborating closely with Product, DevOps, QA, and Architecture teams to deliver high-quality features within sprint cycles.
Working with Aurora MySQL to design schemas, optimise queries, and ensure performance across distributed systems.
Contributing to event-driven architectures using AWS SNS, SQS, and Step Functions.
Championing a strong testing culture-implementing and maintaining unit and integration tests with xUnit or NUnit.
Leading by example in CI/CD best practices using GitHub Actions and CodePipeline to ensure reliable, automated deployments.
Mentoring junior engineers in coding standards, secure-by-design principles, and system design.
Troubleshooting, monitoring, and optimising distributed systems using AWS CloudWatch and Grafana.
Proactively identifying and resolving technical debt, driving continuous improvement across codebases.

Requirements

5+ years' experience as a back-end engineer with deep expertise in C# and .NET Core, passionate about building robust, elegant APIs.
Strong understanding of microservices and event driven architectures and cloud-first software design.
5+ years' experience with AWS serverless services (Lambda, API Gateway, SQS/SNS, Step Functions, S3).
Proficiency with relational databases-especially Aurora MySQL-and solid data modelling skills.
Knowledge of secure coding practices, authentication/authorisation (OAuth2, JWT), and data protection fundamentals.
Experience implementing and maintaining CI/CD pipelines and Infrastructure as Code (Terraform or AWS CDK).
Comfortable containerising applications with Docker and deploying via ECS/Fargate or EKS.
Committed to testing excellence across unit, integration, and contract testing.
An excellent communicator who thrives in cross-functional collaboration with Product, DevOps, and Architecture teams.
A self-motivated problem solver who mentors others and consistently pushes for engineering excellence.