Senior .NET/AWS Cloud Engineer - OpenSearch

Compunnel Inc.; New York (NY); Hybrid; USD 110,000 - 193,000; Part time

Job summary

Compunnel, Inc. in New York, NY is seeking a Senior .NET AWS Developer to design and build scalable cloud-native applications using C#, .NET Core/6/7/8. You will implement microservices, REST APIs, and event-driven patterns, with hands-on AWS services and OpenSearch/Elasticsearch for search-driven features.

The role emphasizes search optimization, data ingestion, and integration with AI-powered capabilities, including LLMs and RAG concepts, in a fast-paced Agile environment.

Qualifications

• Proficient in C#, .NET Framework/Core and modern .NET versions (6/7/8).
• Strong microservices, REST APIs, and event-driven architecture expertise.
• Hands-on AWS experience (Lambda, API Gateway, SQS/SNS, Step Functions, S3, RDS).
• OpenSearch and/or Elasticsearch for scalable search solutions.
• Experience designing search solutions, indexing, and data ingestion pipelines.
• Familiar with cloud-native architectures and distributed systems.

Responsibilities

• Design and develop scalable cloud-native apps using C#/.NET in AWS.
• Build search-driven applications with OpenSearch/Elasticsearch integrations.
• Optimize search performance and data ingestion pipelines.
• Contribute to AI-powered capabilities with LLM/RAG concepts when applicable.

Skills

C#

.NET Framework

.NET Core

.NET 6/7/8

Microservices

REST APIs

Event-driven

Distributed systems

OpenSearch/Elasticsearch

AWS services

Search-driven apps

Query optimization

AI/LLMs (pref)

RAG (pref)

Tools

Docker

Kubernetes

AWS Bedrock

Job description

.NET AWSDeveloper w/ OpenSearch/Elasticsearc

New York, New York

09/04/2026

Contract

Active

Job Description:

Job Summary

The Senior .NET Developer will design and develop scalable, cloud-native applications using C#, .NET Framework, .NET Core, and modern .NET versions. The role requires strong expertise in microservices, REST APIs, event-driven architecture, distributed systems, and AWS services, along with mandatory hands-on experience with OpenSearch or Elasticsearch. The developer will build search-driven applications, optimize search performance, develop cloud integrations, and contribute to AI-powered application capabilities. Generative AI experience is preferred, particularly with LLMs, RAG, AWS Bedrock, Agentic AI, prompt engineering, and vector databases.

Required Qualifications

• Strong experience with C#, .NET Framework, .NET Core, and .NET 6/7/8.

• Strong expertise in Microservices Architecture, REST APIs, and Event-Driven Architecture.

• Hands-on experience with AWS services including Lambda, API Gateway, SQS, SNS, Step Functions, S3, and RDS.

• Experience designing and developing scalable cloud-native applications.

• Strong understanding of distributed systems and API integrations.

• Minimum 2+ years of hands-on experience with OpenSearch and/or Elasticsearch.

• Experience designing search solutions and developing search integrations.

• Experience implementing indexing strategies and data ingestion pipelines.

• Experience with query optimization, performance tuning, and search relevance tuning.

• Experience building search-driven applications.

Preferred Qualifications

• Experience with Large Language Models (LLMs).

• Experience with Retrieval-Augmented Generation (RAG).

• Experience with AWS Bedrock.

• Experience with Agentic AI.

• Experience with prompt engineering.

• Experience with vector databases.

• Experience with Docker and Kubernetes.

• Experience building AI-powered search and recommendation systems.

• Experience working in Agile/Scrum environments.

• AWS certification such as Solutions Architect, Developer, or DevOps Engineer.