Senior .NET/C# Backend Developer (AWS Serverless)

TL;DR

Senior .NET/C# Backend Developer (AWS Serverless): Building and optimizing serverless and event-driven backend systems for an international product with an accent on AWS infrastructure, high-performance PostgreSQL, and Web API design. Focus on developing scalable serverless architectures using AWS Lambda, Step Functions, and optimizing complex database queries at scale.

Location: Remote (Must be available during US Eastern Time (EST) business hours)

Company

HeadHunter is a leading recruitment platform and HR technology company.

What you will do

• Develop and maintain backend services using C# and .NET 8+.
• Design and implement serverless and event-driven architectures using AWS services such as Lambda, EventBridge, and Step Functions.
• Build and optimize high-performance Web APIs over HTTP using OpenAPI/Swagger.
• Optimize PostgreSQL database performance, including index design, table partitioning, and query tuning.
• Collaborate daily with an international team using English for all technical communication.

Requirements

• Strong spoken and written English for daily technical communication.
• Strong commercial experience with C# and .NET 8+.
• Hands-on expertise with AWS services (Lambda, IAM, CloudFormation, S3, SQS, SNS).
• Advanced PostgreSQL knowledge, including EXPLAIN ANALYZE and performance tuning at scale.
• Experience with Dapper, Redis, and NoSQL concepts.
• Proficiency with Docker, Git, and PowerShell or Bash scripting.

Nice to have

• Experience with Datadog for system monitoring.
• Knowledge of media-processing tools like FFmpeg, AWS MediaConvert, or SkiaSharp.
• Experience with WebSockets and Azure Cognitive Search.

Culture & Benefits

• Fully remote work arrangement.
• Opportunity to work within an international development team.
• Modern tech stack focus (.NET 8+ and AWS Serverless).
• Flexible work environment provided high-speed internet and timezone alignment.