Position: Senior Backend Serverless Developer, Node.js
Company: Intellias
Experience required: 5y
English level: intermediate

Project Overview:

Our client is a leading software and services provider to communications and media companies, is looking for a skilled team to implement a People Services Mobile app for internal usage. The application aims to provide simple and user-friendly digital experience of the corporate services for Customer's employees and contractors.

Responsibilities:

Strong Mid + engineer with real project experience in designing and developing web application backends on AWS Serverless framework components including:

Authentication:
* OAuth2: MS Azure Active Directory.

Main:
* IAM (Roles, Permissions);
* API Gateway (REST APIs);
* AWS AppSync (GraphQL APIs);
* Lambda (Node.js);
* DynamoDB;
* CloudFront + LambdaEdge + S3;
* CloudFormation.

Extra:
* CloudWatch + X-Ray;
* Systems Manager (Parameter Store);
* Key Management Service.

Maybe we will use in Cafeteria:
* SQS;
* SNS;
* Step Functions.

Requirements:
* Clear understanding of Lambda (NodeJS) best practices and optimization, including caching, connection reuse, monitoring/logging, and Lambda MS patterns design;
* Understanding of OAUTH2/OIDC authentication patterns (including Auth Code and token refresh) and JWT token usage;
* Experience in building secure AppSync GraphQL schemas and resolvers for DynamoDB, AuroraSQL, and HTTP 3rd party endpoints;
* Experience in building secure AppSync realtime integrations with consideration to custom authentication based on OIDC tokens;
* Experience in designing and building secure REST APIs in AWS API Gateway with OpenAPI and Swagger for web application clients;
* Knowledge and hands-on experience of DynamoDB data modeling design and query pattern design;
* Experience in design of event driven services, both Synchronous and Asynchronous;
* Experience working with AWS SAM templates for serverless deployments;
* Experience working with GIT repository;
* Experience working as part of a development team within an Agile SDLC scrum process;
* Expected to document and guide detailed design based on HL solution architecture, following best practices and expected optimizations;
* Expected to communicate detail design to developers and help answer questions, make necessary adjustments, and communicate with Solution Architect in case of any challenges or required changes;
* Expected to write unit testing for any developed features;
* Expected to participate in feature demos at the end of each Sprint;
* Expected to work closely with BA and QA team to guide and review test cases;
* Expected to complete code reviews and ensure design compliance on developed features;
* Must be able to independently troubleshoot issues and resolve problems both in code and in work environment.

 Additional experience:
* Familiarity with LambdaEdge and Lambda authenticators a plus;
* Familiarity with Azure Graph API and Azure AD IDP a plus;
* Familiarity with AWS Step Functions;
* Familiarity with TFS on GIT a plus;
* Familiarity with Jira a plus;
* Familiarity with AWS Well Architected Framework.