Mandatory Experience & Skills

Overall Experience

- 6+ years of backend/software engineering experience, minimum 3 years handson with Node.js/NestJS/Express.js.
- Strong experience building production-grade B2C systems at scale.
- Must have worked on applications with large user bases and high API/transaction volumes.
- Experience with systems where performance, reliability, scalability, and security are critical.
- Proven ability to own backend features endtoend: design, development, deployment, monitoring, troubleshooting.
- Experience working with Agile product engineering teams: Product, Frontend, QA, DevOps, Cloud.

Backend Engineering & Microservices Mandatory

- Strong handson experience with Node.js, Express.js, and NestJS.
- Experience designing REST APIs, microservices, modular service architecture, and domaindriven structures.
- Strong experience in PostgreSQL and MongoDB, including schema design, indexing strategies, query optimisation, transactions, aggregation pipelines.
- Experience with Redis for caching, sessions, queues, and performance acceleration. • Experience building systems with JWT/OAuth2, authentication, authorization, RBAC. • Experience implementing secure coding practices, data validation, sanitisation, and API security.
- Experience integrating thirdparty APIs, SDKs, partners, and external services.
- Experience with message queues, async processing, and distributed patterns (SQS/SNS, event-driven flows).

AWS Cloud Mandatory

Hands-on experience with:

- ECS/Fargate
- API Gateway
- S3
- CloudWatch (logs, alerts, dashboards)
- IAM, VPC, private/public networking
- Load balancers, scaling groups

CI/CD, DevOps & Engineering Practices

- Strong experience with Docker, Git, CI/CD pipelines (GitHub Actions/Jenkins/GitLab).
- Experience with automated testing (unit, integration, contract tests).
- Experience with logging, monitoring, alerting, and production troubleshooting.
- Code reviews, backend design best practices,



and maintaining high engineering standards.

Scale & B2C Experience (Critical Requirement)

Candidates must have experience working on large-scale consumer-facing systems, preferably with:

- Millions of users or large registered user bases.
- High daily/monthly active usage.
- High-volume API traffic and distributed microservices.
- Platforms requiring high availability, low latency, resilience, and robust fault tolerance.
- Experience handling production incidents, performing RCA, and improving platform reliability.

Candidates who have only worked on internal enterprise tools, small apps, prototypes, or low-scale systems should notbe considered.

Preferred Experience

The following would be advantageous:

- Experience with NestJS in large-scale production systems.
- Experience with event-driven architecture and streaming (Kafka/Kinesis/PubSub).
- Experience using AWS SQS/SNS, Step Functions, Lambda, or serverless patterns.
- Experience with API versioning, throttling, rate limiting, and gateway policies.
- Experience with CI/CD on AWS (CodePipeline, ECS blue/green deployment).
- Experience with performance tuning and monitoring tools.
- Experience with domains such as wellness, insurance, fintech, ecommerce, or other highvolume B2C products.
- Experience with caching strategies, horizontal scaling, and distributed locks.
- Experience with security standards (OWASP, encryption, token-based auth).

Key Responsibilities

- Design, develop, and maintain backend services and microservices using Node.js/NestJS.




- Build and optimise REST APIs for high-volume consumer traffic.• Work extensively with PostgreSQL, MongoDB, Redis for schema design, queries, caching, and performance tuning.
- Deploy, monitor, and manage backend services on AWS (ECS, S3, API Gateway, CloudWatch).
- Collaborate closely with Frontend, Product, QA, DevOps, Cloud teams.
- Implement secure coding standards, authentication flows, input validation, and API security.
- Troubleshoot production issues, perform RCA, and implement permanent fixes to improve system reliability.
- Participate in architecture discussions, contribute to design decisions, and maintain high engineering quality.
- Contribute to CI/CD pipelines, testing strategies, monitoring setup, and deployment automation.
- Take full ownership of backend modules from development to production support.

Technical Stack

Primary

- Node.js
- NestJS / Express.js
- PostgreSQL
- MongoDB
- Redis
- REST APIs
- Docker
- AWS (ECS, S3, API Gateway, CloudWatch)
- Git

Preferred

- SQS/SNS
- Step Functions / Lambda
- Kafka / Kinesis
- CI/CD tooling (GitHub Actions, GitLab CI, Jenkins)
- Testing frameworks (Jest, supertest)
- Monitoring tools (CloudWatch, Datadog, New Relic, Sentry)

Candidate Profile

We are looking for an engineer who is:

- A strong hands-on backend engineer, not a people manager.
- Experienced building and scaling high-volume B2C backend systems.
- Able to design robust, reliable distributed services and APIs.
- Strong with databases, caching, and cloud-native architectures.
- Skilled at debugging complex issues in production.
- Comfortable working independently and taking backend ownership.
- Strong at translating business requirements into scalable backend solutions.
- Able to collaborate effectively with product, frontend, QA, DevOps, and cloud teams.
- Focused on reliability, performance, security, and maintainability.

📌 Senior Backend Engineer (Thane)
🏢 SoftPixel Solutions
📍 Thane