Senior .NET Engineer

Komodo Consulting; Lisbon (AR); Hybrid; USD 70,000 - 105,000; Full time

Job summary

Komodo Consulting seeks a Senior .NET Engineer to design and implement microservices on .NET 8, focusing on scalability and clean architecture. You will build event-driven workflows with AWS SNS/SQS and integrate LLMs with Python-based AI logic, bridging .NET backends with AI capabilities.

You will develop real-time data pipelines using AWS Data Firehose/Streams, ensure code quality with unit/integration tests, and collaborate with SRE to deploy via GitHub Actions and Terraform.

Qualifications

• Deep expertise in C# and .NET Core / .NET 8.
• Hands-on experience building cloud-native applications on AWS.

Responsibilities

• Design and implement high-performance microservices using .NET 8, with a focus on scalability and clean architecture.
• Build and refine asynchronous, event-driven workflows using AWS SNS/SQS, ensuring data consistency and system resilience.
• Lead the technical integration of Large Language Models (LLMs) into core applications, bridging .NET backends with Python-based AI logic.
• Collaborate on the design and development of high-throughput data pipelines using AWS Data Firehose and Data Streams for real-time processing.
• Uphold high code quality standards through unit and integration testing using xUnit and WireMock.
• Work closely with SRE teams to deploy services via GitHub Actions and manage cloud infrastructure through Terraform.
• Leverage AI-assisted tooling such as GitHub Copilot and ChatGPT to accelerate delivery while maintaining rigorous oversight of code security and efficiency.

Skills

C# & .NET

Event-driven arch

LLMs & Python

Unit testing

DevOps

English B2+

Redis caching

Tools

AWS SNS/SQS

AWS S3

AWS ECS

Terraform

Docker

GitHub Actions

OpenAI API

Job description

Komodo Consulting is a technology and strategy firm specializing in Digital Transformation. Operating in Portugal and Poland, we provide IT Consulting & Nearshore services. We support both public and private sector organizations through two main areas:

- Consulting — with a focus on strategy, investment analysis, and digital process improvement;

- IT Team Augmentation — helping clients scale and strengthen their tech teams.

The Project

We are seeking a Senior .NET Engineer to work on a project for a Technology Company.

You will have the following responsibilities:

• Design and implement high-performance microservices using .NET 8, with a focus on scalability and clean architecture;
• Build and refine asynchronous, event-driven workflows using AWS SNS/SQS, ensuring data consistency and system resilience;
• Lead the technical integration of Large Language Models (LLMs) into core applications, bridging .NET backends with Python-based AI logic;
• Collaborate on the design and development of high-throughput data pipelines using AWS Data Firehose and Data Streams for real-time processing;
• Uphold high code quality standards through unit and integration testing using xUnit and WireMock;
• Work closely with SRE teams to deploy services via GitHub Actions and manage cloud infrastructure through Terraform;
• Leverage AI-assisted tooling such as GitHub Copilot and ChatGPT to accelerate delivery while maintaining rigorous oversight of code security and efficiency.

You need to have the following skills/experience:

• Deep expertise in C# and .NET Core / .NET 8, including strong knowledge of the framework's internals;
• Hands-on experience building cloud-native applications leveraging AWS services, including SNS, SQS, S3, and ECS;
• Strong understanding of Event-Driven Architecture and distributed systems patterns such as Pub/Sub, Competing Consumers, and Idempotency;
• Proven experience with Redis or Valkey for caching, state management, and performance optimization;
• Experience or demonstrable interest in working with LLMs and Python, including RAG systems or OpenAI/Anthropic API integrations;
• A test-first mindset with solid experience in unit and integration testing practices;
• Familiarity with DevOps tooling including Docker, GitHub Actions, and Terraform;
• English proficiency at B2 level or above, with confidence communicating and collaborating in a fully English-speaking work environment.

Location

Lisbon, Hybrid 2x a week at the office.