Application Guide

How to Apply for Senior Back-End Developer (Node/Express.js)

at Worldly

🏢 About Worldly

Worldly stands out as the leading impact intelligence platform, providing real supply chain data to businesses worldwide. Working here means contributing to sustainability and transparency in global commerce, with a mission-driven team and a remote-first culture focused on LATAM talent.

About This Role

As a Senior Back-End Developer, you'll architect and build the core APIs and data systems that power Worldly's impact intelligence platform. Your work will directly enable companies to measure and improve their environmental and social impacts, making this role both technically challenging and socially impactful.

💡 A Day in the Life

Your day might start with a stand-up meeting with your distributed team, followed by coding on a new API endpoint for supplier data. You'll review a colleague's pull request, then dive into optimizing a database query based on telemetry data. Afternoon could involve a design discussion for a new feature, ending with writing tests and documentation.

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Interview Prep

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🎯 Who Worldly Is Looking For

  • A seasoned back-end engineer with 7+ years of experience, who has deep expertise in TypeScript, Node.js, and Express.js for building complex, secure APIs.
  • Proficient in both relational (PostgreSQL, MySQL) and NoSQL (MongoDB) databases, with strong data modeling skills to design efficient schemas for diverse data types.
  • Passionate about code quality: writes clean, testable code, participates in code reviews, and uses profiling/telemetry to optimize performance.
  • Comfortable working remotely in LATAM time zones, with strong communication skills for collaborating with a distributed team.

📝 Tips for Applying to Worldly

1

In your resume, highlight specific projects where you designed and scaled RESTful APIs using TypeScript and Express.js, including database schema decisions.

2

Tailor your cover letter to mention your experience with both relational and NoSQL databases, as Worldly likely handles diverse data from supply chains.

3

Showcase any work related to security best practices (e.g., authentication, authorization, data protection) since the platform deals with sensitive impact data.

4

If possible, include links to GitHub repos or code samples demonstrating clean, well-documented TypeScript/Node.js code with tests.

5

Mention any experience with performance optimization (profiling, caching, query tuning) as the role emphasizes application performance.

✉️ What to Emphasize in Your Cover Letter

['Emphasize your 7+ years of back-end development experience, specifically with TypeScript, Node.js, and Express.js.', "Highlight your expertise in data modeling for both SQL and NoSQL databases, and how you've designed schemas for complex domains.", "Express enthusiasm for Worldly's mission of driving supply chain sustainability and how your technical skills can contribute.", 'Mention your experience with code reviews, testing, and writing maintainable code, aligning with their collaborative culture.']

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🔍 Research Before Applying

To stand out, make sure you've researched:

  • → Explore Worldly's website to understand their impact intelligence platform and the types of data they handle (e.g., carbon emissions, labor practices).
  • → Read their blog or news section to learn about recent partnerships or product updates related to sustainability.
  • → Check their engineering blog or any public talks by their team to understand their tech stack and culture.
  • → Look into how their platform integrates with other systems (e.g., ERP, supply chain software) to anticipate API design needs.

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 Design a RESTful API endpoint for a supply chain impact metric, including database schema and error handling.
2 How would you optimize a slow query in PostgreSQL? Walk through profiling and indexing strategies.
3 Explain your approach to securing a Node.js API (e.g., authentication, input validation, rate limiting).
4 Describe a time you had to refactor a legacy codebase. How did you ensure backward compatibility?
5 Given Worldly's data, how would you design a data model to track carbon emissions across multiple suppliers?
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⚠️ Common Mistakes to Avoid

  • Don't ignore the requirement for TypeScript proficiency; if you lack experience, gain some before applying.
  • Avoid applying without tailoring your resume to highlight back-end work; generalist or front-end focused resumes will be overlooked.
  • Don't neglect to mention remote work experience or LATAM time zone availability; it's a key requirement.

📅 Application Timeline

This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.

Typical hiring timeline:

1

Application Review

1-2 weeks

2

Initial Screening

Phone call or written assessment

3

Interviews

1-2 rounds, usually virtual

✓

Offer

Congratulations!

Ready to Apply?

Good luck with your application to Worldly!

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