Role SummaryWe are hiring a Full Stack Engineer to build and run data-driven web applications end to end: Java/Spring Boot services, React/TypeScript front ends, MongoDB and MySQL data stores, and the web scraping pipelines that feed them. You will own features from data acquisition through API to UI.
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Experience:
3 years
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Location:
Bangalore
• Employment type: Full-time
• Reports to: Technical Lead
• Core stack: Java, Spring Boot, React, TypeScript, MongoDB, MySQL, Web Scraping

Key Responsibilities
• Design, build and maintain RESTful services and microservices in Java and Spring Boot.
• Build responsive, reusable UI components and pages in React with TypeScript.
• Design data models and write productive queries for MongoDB (documents, indexes, aggregation pipelines) and MySQL (schemas, joins, query tuning).
• Build and maintain web scraping and crawling pipelines that collect, clean, normalise and store data from websites and APIs at scale.
• Handle scraping challenges: dynamic JavaScript pages, pagination, rate limits, retries, proxies, and changes to site structure.
• Integrate scraped and third-party data into backend services and expose it through APIs and the UI.
• Write unit and integration tests; take part in code reviews and keep code quality high.
• Monitor, debug and improve the performance and reliability of applications in production.
• Work with product, QA and data teams to turn requirements into shipped features.
• Follow responsible scraping practice: respect robots.txt, site terms and data-privacy rules. Required Skills
• Java: Strong core Java (Java 11+) – OOP, collections, streams,



concurrency, exception handling.
• Spring Boot: REST APIs, Spring Data (JPA and MongoDB), Spring Security, dependency injection, scheduled jobs.
• React: Hooks, component design, state management (Redux, Zustand or Context), routing, form handling.
• TypeScript: Typed components and API clients, interfaces and generics, strict mode.
• MongoDB: Document schema design, indexing, aggregation framework, performance tuning.
• MySQL: Relational modelling, complex SQL, joins, indexes, transactions, query optimisation.
• Web Scraping: Hands-on with Jsoup, Selenium, Playwright or Puppeteer; HTML/DOM parsing, XPath and CSS selectors; handling dynamic pages, proxies, throttling and anti-bot measures.
• General: Git, REST/JSON, HTML and CSS, debugging, clean and testable code (JUnit, Jest). Good to Have
• Python scraping tools (Scrapy, BeautifulSoup) alongside Java-based scraping.
• Message queues and schedulers for crawl jobs (Kafka, RabbitMQ, Quartz).
• Elasticsearch or OpenSearch for search over collected data.
• Docker, CI/CD pipelines (Jenkins, GitHub Actions) and cloud deployment, preferably AWS.
• Next.js or server-side rendering experience.
• Exposure to NLP, LLM-based extraction or data quality checks on unstructured content. Qualifications
• B.
E./B.
Tech/MCA in Computer Science or a related field, or equivalent practical experience.
• 3–6 years of professional full-stack development with Java and React.
• At least one production web scraping or data-collection project you can walk us through.
• Clear written and verbal communication; comfortable owning a feature end to end.

📌 Full Stack Engineer (Bengaluru)
🏢 MOLECULAR CONNECTIONS
📍 Bengaluru