Full Stack Engineer

Mastek; Dadri; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Mastek is seeking a capable full-stack engineer to develop features across the stack using React/Redux on the frontend and Python/FastAPI on the backend. You will design REST APIs, work with relational and NoSQL databases, and ensure secure handling of healthcare data.

You will collaborate with product, design, and QA teams, participate in CI/CD via GitLab, and apply observability practices to diagnose production issues. Experience with Docker and cloud/observability tools is valued.

Qualifications

• Experience with React front-end and Python back-end web services.
• Proficient in PostgreSQL and MongoDB.
• Experience writing automated tests for frontend and backend.
• Strong Git collaboration.
• Solid CS fundamentals and system design basics.

Responsibilities

• Build features across the stack using React/Redux and Python/FastAPI.
• Design and integrate REST APIs with rate limiting, retries, and idempotency.
• Model and query data across MongoDB, PostgreSQL, and Elasticsearch.
• Work with Kafka streams for cross-service communication.
• Write unit and integration tests (Jest, React Testing Library, pytest).
• Debug production issues using observability tools (OpenTelemetry, NewRelic).
• Collaborate with product, design, QA; contribute to CI/CD with GitLab and Docker deployments.
• Apply secure coding practices for healthcare data.

Skills

React

Redux

Python

FastAPI

Django

PostgreSQL

MongoDB

Elasticsearch

Git

System design

Data structures

Testing

Tools

Docker

Grafana

OpenTelemetry

NewRelic

LangChain

RAG pipelines

Job description

• Build features across the stack: React/Redux on the frontend, Python/FastAPI services on the backend
• Design and integrate REST APIs, including rate limiting, retries, and idempotency for external integrations
• Model and query data across MongoDB, PostgreSQL, and Elasticsearch as needed
• Work with Kafka based event streams for cross-service communication
• Write unit and integration tests on both ends of the stack (Jest/React Testing Library on frontend, pytest on backend)
• Debug and triage production issues across the stack, using observability tools (OpenTelemetry, NewRelic) to find root cause
• Collaborate with product and design on features, and with QA on test coverage
• Contribute to CI/CD pipelines (GitLab CI) and Docker based deployments
• Apply secure coding practices, given the platform handles healthcare data

Required skills

• Working knowledge of React (hooks, state management with Redux) and a Python web framework (FastAPI or Django)
• Comfortable working with both relational (PostgreSQL) and NoSQL (MongoDB) databases
• Experience writing automated tests on both frontend and backend
• Proficient with Git and collaborative workflows
• Strong CS fundamentals: data structures, algorithms, and system design basics

Good to have

• Experience with Kafka or other event streaming/message queue systems
• Experience with LLM/AI tooling: LangChain, RAG pipelines, or agent frameworks
• Familiarity with Docker and containerized deployments
• Familiarity with observability tooling (OpenTelemetry, NewRelic, Grafana)
• Exposure to multi-cloud storage SDKs (AWS, Azure, GCP)
• Healthcare interoperability background (FHIR, HL7, EHR integrations such as Epic or Cerner) - not required, general distributed systems thinking matters most