There are 70.1 million Hispanic people in the United States, 21% of the population, according to the Census Bureau's 2025 estimates. About 44.9 million people aged five and older speak Spanish at home. If your product serves those users, or serves customers in Latin America, a developer who reads Spanish can catch problems your monolingual team will ship without noticing.
Most engineering roles don't need Spanish at all, though. The mistake teams make is adding "bilingual preferred" to every job post, which shrinks the pool and screens for the wrong thing. Start by working out whether the role actually needs it.
Key Takeaways
- Spanish matters when engineers work on Spanish-language product surfaces, with Spanish-speaking users or ops teams, or on localization.
- For most backend and infrastructure work, English is the only language that affects output. Don't filter on Spanish there.
- Latin America is the natural pool: senior engineers who work in Spanish daily and in English with US teams.
- Screen both languages in live conversation. Self-reported levels on a resume are not reliable.
When Spanish Actually Matters
Your product has Spanish-language users. Translating strings is the easy part. The hard part is everything around the strings: names with two surnames that break a `first_name` / `last_name` form, addresses that don't fit a US schema, date and number formats, Spanish text that runs longer than the English and breaks a button. A developer who uses Spanish every day spots these in code review. A translator working from a spreadsheet does not.
Your users want support in their language. In a global survey of 8,709 consumers, CSA Research found 76% prefer product information in their native language, and 75% are more likely to buy again when customer care is in their language. That study covers consumers in 29 countries, not US Hispanics specifically, so treat it as direction rather than a US number. If your engineers build the support tooling, help center, or in-app messaging, Spanish helps them build it right.
You run operations in Latin America. Payments with local processors, compliance documents from a regulator in Mexico City, vendor APIs whose docs are only in Spanish, an ops team in Bogota filing bugs. An engineer who can read the source material directly saves a translation step on every ticket.
Your team is already in Latin America. If some of your engineers are nearshore, a bilingual lead who can move between English with the US team and Spanish with the local team makes the whole group faster.
When It Doesn't
A data pipeline, a Kubernetes migration, or a payments ledger with no user-facing text runs in English: code, docs, tickets, and meetings. Requiring Spanish for that work gets you nothing and cuts out strong candidates. Keep it off the requirements list.
Where to Find Them
The obvious pool is Latin America. Instituto Cervantes counts about 520 million native Spanish speakers worldwide, and senior engineers across Mexico, Colombia, Argentina, Peru, and Chile work in Spanish locally and in English with US clients. The question in Latin America is English level, which varies a lot by country and person. Our guide to hiring LATAM developers covers how to check it.
US-based bilingual engineers exist too, and they cost what US engineers cost. Pew Research reports that the share of US Latinos who speak Spanish at home fell from 78% in 2000 to 68% in 2024, so heritage speakers vary a lot in written and technical Spanish. Don't assume it. Test it.
How to Screen Both Languages
| What to test | How | What good looks like |
|---|---|---|
| Technical English | Live system-design conversation in English | Explains trade-offs clearly, asks clarifying questions, handles interruptions |
| Written English | Async PR description or design note | A reviewer on your team understands it without follow-ups |
| Technical Spanish | 10 minutes of the same conversation in Spanish, led by a Spanish speaker | Can describe the system, a bug, or a user problem naturally |
| Localization sense | Show a signup form and a receipt; ask what breaks for a user in Mexico | Mentions names, addresses, dates, currency, text length |
Run the English part as a normal technical interview. Our guide to remote technical interviews covers the setup. Then switch languages partway through. The switch tells you a lot, because it tests whether the candidate can hold the same technical conversation in both, which is what the job will ask of them.
A Concrete Version
A US lending startup is launching a Spanish version of its app for customers in Texas and California. It needs a senior frontend engineer.
The first job post says "bilingual required" and gets 40 applicants, six of whom pass the technical screen. The team rewrites the post: senior React engineer, strong English, working Spanish for a Spanish-language launch. They add the localization exercise to the screen.
The candidate they hire, based in Lima, flags three things in her first week: once the app switched to a generic Spanish locale, the income field displayed thousands with periods and then rejected its own formatted value, the ID step asks for a Social Security number with no path for customers using an ITIN, and two error messages were machine-translated into something a Mexican customer would read as rude. None of these were in the translation vendor's scope. All three would have hurt conversion at launch.
The Honest Counterpoint
A bilingual engineer can't replace real localization work. Legal disclosures, marketing copy, and anything regulated should go to a professional translator and a native reviewer for the target market. Mexican, Caribbean, and South American Spanish differ, and an engineer from Buenos Aires won't catch every regional issue for a Puerto Rican audience.
Watch for the opposite failure too. If you pick the bilingual candidate over a stronger engineer because of language, you've optimized the wrong thing. For most roles, engineering skill comes first and Spanish is a tiebreaker.
Frequently Asked Questions
Should I require Spanish for all roles on a Spanish-language product?
No. Require it for engineers who touch user-facing text, forms, support flows, or Latin American integrations. Backend and infrastructure roles on the same product rarely need it.
How do I test Spanish if nobody on my team speaks it?
Use a Spanish-speaking engineer from a partner, a trusted contractor, or your staffing provider to run a 10-minute technical conversation in Spanish. Keep it technical, not conversational.
Where are bilingual senior developers easiest to find?
Latin America, where senior engineers work in Spanish daily and many work in English with US teams. Screen English as carefully as you screen skill. See interview questions for a senior engineer for the technical side.
The Bottom Line
Decide whether the role needs Spanish before you write the job post. If it does, test both languages in a live technical conversation. If it doesn't, leave it off. Ruzora sends a vetted shortlist of senior LATAM engineers within 72 hours. See available engineers or request a shortlist.
Roberto Espinoza is CEO of Ruzora, which helps US startups hire pre-vetted senior LATAM engineers, with a vetted shortlist in 72 hours. See available engineers.
