Senior / Staff Backend Software Engineer

ExpiWellJodhpur, IN

10 hours ago

Job description

Senior Backend Developer (Nest.JS - AWS - Mongo - Apollo GraphQL)

Required skills :   Nest.JS, MongoDB, AWS, Apollo GraphQL.

Company Description

At ExpiWell, we are transforming how organizations gather real-time, in-the-moment insights about human experiences. Our Experience Sampling Methodology (ESM) platform and mobile apps replace outdated survey methods, allowing organizations to capture dynamic and contextual data. Trusted by leaders in HR, Product & CX, Healthcare, and Academia, ExpiWell enables the collection of engagement, emotion, and behavior information through geofencing-triggered surveys and multimedia data capture. We aim to enhance research and promote a greater understanding of the human condition.

Position Overview :

We're seeking an experienced Senior Backend developer to modernize and extend our ExpiWell research platform API using NestJS and Apollo GraphQL, AWS and MongoDB Atlas architecture. The main server will be serving a native IOS and and Android Application as well a modern unified React Native app that is currently in development.

Key Responsibilities :

Migrate legacy API endpoints from Express to NestJS v11 with full TypeScript typing.
Build RESTful APIs , WebSocket gateways, and background job systems. -Improve out AWS infrastructure to a more modern VPS. AWS certification a huge plus. - Redesign our MongoDB architecture to better align with global customers. - Apollo GraphQL certificate training in Parts 1 to 4. (must complete)
Implement authentication, payment processing, and real-time messaging features.
Write comprehensive unit tests (Jest) and maintain >

80% code coverage

Design and document APIs using Swagger / OpenAPI specifications.

Review and validate AI-generated code for quality, security, and best practices

Implement AWS integrations (S3, SES) and third-party services (SendGrid, Stripe, Twilio)

Required Skills

Technical Stack

Expert-level NestJS (v11+) with dependency injection, guards, interceptors, pipes

Advanced TypeScript (v5.7+) with generics, decorators, and type safety patterns -

Apollo GraphQL basic 1-4 certificate training. Free training provided by Apollo Odyssey.

MongoDB with Mongoose ODM and complex aggregations

Testing : Jest, unit testing, E2E testing, test coverage strategies

RESTful API design and versioning strategies

WebSocket / Socket.IO for real-time features

AWS Services : S3, SES, CloudWatch

Git workflow with conventional commits and PR reviews

AI-Assisted Development

Experience using AI coding assistants (Claude code VSCode CLI)

Ability to write effective prompts for code generation

Strong code review skills to validate AI-generated code

Understanding of when to trust AI vs. manual implementation

Familiarity with AI-assisted testing and documentation

Nice to Have

React / Next.js experience

Redis for caching and distributed locking

Stripe payment integration

Twilio SMS / voice integration

Puppeteer / headless browser automation

Sentry error monitoring

Docker containerization

Experience with research / survey platforms

What Makes You Great for This Role

You can rapidly prototype features using AI assistance while maintaining code quality

You understand modern backend architecture (microservices, event-driven, CQRS)

You write clean, maintainable code that follows SOLID principles

You're comfortable working with large codebases and legacy migration

You proactively write tests and documentation

You can debug complex issues across multiple services

You stay current with JavaScript / TypeScript ecosystem trends

Project Context

You'll be working on a research platform that powers mobile experience sampling studies. The API handles :

Survey delivery and response collection

Real-time participant messaging

Payment / incentive distribution

Media upload and transcription

Geofencing and sensor triggers

Anonymous survey participation

Development Environment

Framework : NestJS v11 monorepo with shared libraries

Package Manager : pnpm

Code Quality : ESLint v9, Prettier, TypeScript

Testing : Jest v30 with coverage reporting

AI Tools : Claude Code CLI for development assistance

Deployment : AWS infrastructure

How to Apply

Submit your application with :

1. Resume highlighting NestJS and TypeScript projects

2. GitHub and profile

3. Brief description of your experience with AI coding tools.

What We Offer :

Fully remote, flexible work setup

Supportive, collaborative global team

Opportunities for long-term growth and increased responsibility

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Senior Software Engineer Backend • Jodhpur, IN