Junior Fullstack Engineer

This role is best suited for a Junior Fullstack Engineer with a solid foundation in web development and a strong interest in backend systems, APIs, and problem-solving. The candidate should be proficient in Ruby, Ruby on Rails, JavaScript, MongoDB, Git, Linux, AWS, testing, debugging, and REST API development, with experience in web scraping, proxies, CAPTCHA solving, or browser technologies being a plus. They should be familiar with developing and maintaining APIs, troubleshooting production issues, reviewing code, deploying applications, collaborating in a remote-first environment, and writing technical documentation and blog posts.

1. How would you design a REST API endpoint in Ruby on Rails for a new search feature?
   Answer: I would follow REST conventions, keep controllers thin, place business logic in service objects or models, validate input, return appropriate HTTP status codes, and write automated tests for the endpoint.

2. What are the advantages of Ruby on Rails for building web applications?
   Answer: Rails provides convention over configuration, built-in ORM, routing, authentication support, and rapid application development while encouraging clean, maintainable code.

3. How does MongoDB differ from a relational database like PostgreSQL?
   Answer: MongoDB is a document-oriented NoSQL database with flexible schemas, making it suitable for evolving data models, while PostgreSQL uses structured relational tables with strong consistency and SQL queries.

4. How would you troubleshoot a customer-reported API issue in production?
   Answer: I would reproduce the issue, inspect logs and monitoring data, identify the root cause, create a fix with tests, deploy safely, and verify that the problem is fully resolved before closing the issue.

5. What makes a good pull request review?
   Answer: A good review checks correctness, readability, maintainability, test coverage, performance, and security while providing constructive feedback that helps improve both the code and the developer.

6. Explain how web scraping works and what challenges are commonly encountered.
   Answer: Web scraping extracts information from websites by making HTTP requests or controlling browsers. Common challenges include dynamic content, rate limiting, CAPTCHAs, anti-bot protections, and changing page structures.

7. How would you improve the performance of an API that has become slower over time?
   Answer: I would profile the application, optimize database queries, introduce caching where appropriate, reduce unnecessary processing, and monitor the impact of each optimization using performance metrics.

8. Describe your Git workflow when implementing a new feature.
   Answer: I create a feature branch, make small well-structured commits, write or update tests, open a pull request for review, address feedback, and merge only after all checks pass successfully.

9. How would you deploy a Rails application to AWS running on Linux servers?
   Answer: I would automate deployment through a CI/CD pipeline, configure environment variables securely, verify database migrations, monitor application health after deployment, and roll back if necessary.

10. Tell us about a technical problem you researched independently and how you solved it.
    Answer: I investigated the issue by reading documentation, experimenting with different approaches, consulting community resources when needed, implemented the most suitable solution, and documented my findings to help the rest of the team.

SerpApi is the leading search data API platform, trusted by companies like Nvidia, Shopify, Perplexity, Adobe, and Samsung to integrate reliable search engine data into their applications. As a Junior Fullstack Engineer, you'll build and maintain APIs, features, and developer tools using Ruby, Ruby on Rails, MongoDB, JavaScript, AWS, and Linux, while contributing to code reviews, troubleshooting, and technical content. This is a fully remote, worldwide role with exceptionally competitive compensation, averaging $232,448 total annual compensation (including profit sharing), flexible working hours, extensive learning support, and a transparent, high-trust engineering culture. If you're eager to grow as a full-stack engineer in a remote-first company that values ownership, openness, and technical excellence, SerpApi is an outstanding place to accelerate your career.