Software Engineer – Authentication

Eleven Eleven

Software Engineer developing AWS serverless integrations connecting hotel WiFi platform with PMS and loyalty programs. Collaborating with cross-functional teams to enhance guest authentication and services.

Posted 6/5/2026full-timeRemote • 🇺🇸 United StatesMid-LevelSenior💰 $135,000 - $150,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudDynamoDB.NETSOAPSQL

About the role

Key responsibilities & impact

Build and maintain AWS serverless integrations that connect our captive portal WiFi platform with hotel Property Management Systems (PMS) and loyalty programs worldwide
Develop, test, and maintain AWS Serverless applications (C# / .NET) that connect our platform with third-party PMS and loyalty APIs
Implement SQS-triggered message processing pipelines that handle guest inquiry, room charge, configuration, and loyalty enrollment work units
Integrate with third-party REST, SOAP, including OAuth2/Cognito authentication flows, token caching, and credential management via AWS SSM Parameter Store
Build and maintain DynamoDB data models for device configuration, session caching, and authentication token storage
Write comprehensive unit tests using mocking frameworks
Leverage AI-assisted development tools to accelerate development, improve code quality, and automate repetitive tasks
Collaborate with other development, product management, and UX team members to turn user stories into performant, scalable capabilities within the ecosystem
Troubleshoot production issues across distributed serverless architectures
Participate in code reviews and contribute to consistent patterns across the team's portfolio of integrations
Identify and incorporate security requirements in the software development lifecycle, including PII handling, data obfuscation, and secure credential storage

Requirements

What you’ll need

3+ years of professional software engineering experience
Experience reading and writing SQL
Proficiency in C# and .NET (experience with .NET 8 or recent versions preferred)
Experience building and deploying AWS Lambda functions or similar serverless architectures
Working knowledge of AWS services: SQS, DynamoDB, API Gateway, SSM Parameter Store, Step Functions, CloudWatch
Experience consuming and integrating with RESTful APIs, including OAuth2 authentication flows
Solid understanding of software design patterns, dependency injection, and writing testable code
Familiarity with Git, CI/CD pipelines, and Infrastructure-as-Code (CloudFormation or SAM preferred)
Experience writing unit tests with mocking frameworks
Experience with AWS networking
Comfort using AI coding assistants (e.g., GitHub Copilot, Cursor, Claude) as part of daily development workflow
Proven experience shipping product as part of an Agile team
Strong desire to help a successful company scale existing cloud-based services while also being a significant contributor to the development of new integrations

Benefits

Comp & perks

medical
dental
vision coverage
401(k) plan
attractive paid time off policy

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

C#.NETAWS LambdaSQLDynamoDBSQSRESTful APIsOAuth2software design patternsunit testing

Soft Skills

collaborationtroubleshootingcode reviewAgile methodologyproblem-solvingcommunicationscalability focussecurity awarenessuser story interpretationdevelopment workflow