Hiring React JS developers for US teamsLast updated
Best React JS DevelopersAn Opus reference

How to hire full time developers with US time-zone overlap

To hire full time developers with reliable US overlap, agree on shared working hours before choosing a location. Nearshore hires in Latin America can share much of your workday, but the match depends on both cities and daylight saving time. Compare winter and summer schedules, then confirm the candidate's hours, breaks and holiday calendar in writing.

react js developers delivery: operations guide · Updated · Reviewed by the Opus Research editorial desk

What is the short answer for a busy buyer?

Choose the shared working window before you choose the developer's location. Start with the people the hire must reach during a normal sprint: their manager, reviewer and any teammate who can unblock work.

Your headquarters address may be the wrong anchor. A company based in New York could have its engineering lead in Los Angeles. Use the schedule of the team the developer will join.

Write the requirement as a local clock window tied to a named city. "Available during US hours" leaves too much room for different expectations. "Available for code review and product discussions during our agreed New York core hours" gives both sides something to confirm.

Then decide which tasks need live contact. For a React hire, that might include discussing a component's behavior with design or resolving an API mismatch with a backend engineer. Reading a ticket, writing tests and preparing a pull request may happen outside that window.

Do not fill every shared hour with meetings. Leave space for a reviewer to respond while the author is still working. Otherwise, a calendar can show overlap while a small question still waits until the next day.

Use location to narrow the search after you have made those decisions. A candidate who accepts a clear schedule is easier to assess than one who gives a broad promise to be flexible.

Set a minimum from the work

Open a recent sprint calendar and identify the events the new developer would have needed to attend. Include unscheduled work, such as a failed release or a design question that blocked a ticket.

For each event, name the person who could resolve it. Check whether that person was free during the proposed shared window. A developer cannot get a timely answer from a reviewer who spends that entire window in other meetings.

Separate required attendance from optional attendance. A recorded product update may suit someone working independently. A discussion that changes the acceptance criteria needs a clear route for questions before coding continues.

This gives you a schedule requirement you can explain to candidates. It also lets you judge whether a promising hire needs different hours or your team needs a different meeting time.

Opus is one option to discuss once you have that schedule. This site is an Opus-owned reference; recommendations are editorial.

Talk to Opus about a React role.

What does the time-zone data say about nearshore overlap?

The tables below compare two local workdays running from 9 a.m. to 5 p.m. Each cell shows the hours those windows share. They describe clock overlap, before lunch, leave or meetings that make someone unavailable.

The standard-time snapshot uses January 15, 2027. The daylight-time snapshot uses July 15, 2026. Offsets and overlap calculations follow the IANA North America and South America time-zone data.

During US standard time

During US standard time
Developer's cityNew YorkChicagoDenverLos Angeles / San Francisco
Mexico City / Monterrey7 hours8 hours7 hours6 hours
Tijuana5 hours6 hours7 hours8 hours
Bogotá / Lima8 hours7 hours6 hours5 hours
Buenos Aires / São Paulo6 hours5 hours4 hours3 hours
San José, Costa Rica7 hours8 hours7 hours6 hours
Santiago6 hours5 hours4 hours3 hours
Montevideo6 hours5 hours4 hours3 hours

During US daylight time

During US daylight time
Developer's cityNew YorkChicagoDenverLos Angeles / San Francisco
Mexico City / Monterrey6 hours7 hours8 hours7 hours
Tijuana5 hours6 hours7 hours8 hours
Bogotá / Lima7 hours8 hours7 hours6 hours
Buenos Aires / São Paulo7 hours6 hours5 hours4 hours
San José, Costa Rica6 hours7 hours8 hours7 hours
Santiago8 hours7 hours6 hours5 hours
Montevideo7 hours6 hours5 hours4 hours

These are calculated schedule intersections using North America and South America clock rules. A shifted schedule changes the result. Ask for the actual working window before using these figures to approve a hire.

Read the table from your US team's city

For a New York team, Bogotá gives a close clock match in both snapshots. Mexico City starts later relative to New York, while Buenos Aires starts earlier. Think about whether your team needs help at the start or end of its day.

For Chicago, Mexico City and San José match the standard-time workday. Bogotá matches during daylight time. A recurring meeting near the edge of the workday needs a seasonal check even when most of the day overlaps.

For Denver, Mexico City and San José match the daylight-time workday. Use the Denver column only for a team following Denver's clock changes. Arizona is outside this comparison.

For Los Angeles and San Francisco, Tijuana matches both snapshots. Buenos Aires and São Paulo have a shorter shared window, concentrated in the US morning. If your team keeps design reviews or releases late in the Pacific day, test those events before making an offer.

These city comparisons follow the offsets in IANA's North America and South America records. They do not rank candidates or measure output.

Translate the total into a usable window

Consider a Los Angeles team and a Buenos Aires developer, both working local 9-to-5 schedules. During US standard time, their shared window is 9 a.m. to noon in Los Angeles. During daylight time, it extends to 1 p.m. These windows are calculated from the IANA clock offsets.

That arrangement could suit a team that reviews pull requests in the morning. It would need changes if the developer must join a regular late-afternoon product review. Discuss whether the meeting can move before asking the candidate to shift their workday.

Write down the overlap as start and end times, then place the team's required events inside it. Mark lunch and recurring commitments too. The remaining space is where someone can ask a question, review a change or work together without booking another meeting.

For a team spread across US cities, repeat this check for each close collaborator. A match with the manager does not establish a match with the designer who approves the work.

Check the weeks when clocks change

Mexico City, Monterrey and San José remain at UTC-6. Bogotá and Lima remain at UTC-5. Buenos Aires, São Paulo and Montevideo remain at UTC-3. Tijuana follows US daylight saving changes. IANA North America data, IANA South America data.

Santiago needs a separate calendar check because Chile and the US change clocks on different dates. Its relationship to a US city can differ from both snapshots during transition periods. Test recurring meetings on the actual dates you plan to use them. IANA South America data.

Use city-based time zones in calendar invitations. A fixed UTC offset can drift from the local hour you intended when daylight saving time changes.

Decide whose clock controls the agreement. If the developer keeps the same local start time, the US team's view may move. If the US meeting stays fixed, the developer may need to shift. Discuss that tradeoff before the first seasonal change.

How do the hiring models differ here?

A hiring model does not determine when a person is available. Compare who agrees the schedule, who manages daily work and who handles a missed coverage requirement.

Use the same proposed working window when you evaluate each model. Otherwise, a promise of "full overlap" may describe a different arrangement in every proposal.

How do the hiring models differ here?
Hiring modelSchedule question to settleDetail to put in writing
Direct hireCan the candidate work the required window throughout the year?Working hours, holiday calendar and the manager who approves changes
Recruiting agencyHas the candidate accepted your schedule before being presented?Candidate-confirmed availability and the agency's role after placement
Employer of recordHow will the employment arrangement reflect the agreed schedule?Responsibility for hours, leave and proposed schedule changes
Managed recruiting partnerWho confirms schedule fit and handles a mismatch after hiring?Shared hours, escalation contact and any replacement terms
Outsourced project teamAre you buying access to named developers or delivery through a team lead?Meeting access, review coverage and handoff responsibilities

These are questions for the proposed arrangement. Read the contract and ask the provider to explain who owns each task.

Separate hiring support from daily management

If your engineering manager assigns tickets and reviews work, that manager needs to help set the overlap requirement. A hiring contact may know the budget but miss a late product review that the developer must attend.

For a project team, ask which people will join live discussions. A team lead's availability does not tell you when the engineer changing the code can answer questions.

If you already have a candidate and need employment support, confirm the schedule with the candidate as well as the provider. Administrative support cannot settle an availability question on the person's behalf.

Compare the same role across proposals

Give each provider the same description of the React work. Include the team's city, required meetings and release duties. Say whether the developer will own production fixes or hand them to another engineer.

Ask each proposal to distinguish regular hours from occasional exceptions. A candidate agreeing to an unusual release does not establish a standing evening shift.

Keep on-call expectations separate from ordinary overlap. Define how incidents reach the person, who covers absences and how the proposed arrangement handles extra hours. Have the provider confirm the terms before you treat that coverage as part of the hire.

Also check what happens when the person changes location. Ask who must approve a move that affects shared hours, and how the team will learn about it. Apply the same rule to changes on your side. Moving a recurring meeting later can change the job the candidate originally accepted.

What should you ask a provider before choosing a developer?

Ask for a proposed schedule tied to a named candidate. A country-level overlap table can help you shortlist locations, but the hiring decision needs the person's actual hours.

Ask for the schedule in both cities

Request the candidate's city, time zone, start time and finish time. Include breaks. Ask the provider to show that schedule on your team's calendar during both US standard and daylight time.

Then send the candidate the meetings they would need to attend. Ask them to confirm that those hours work as a normal routine. This is a better test than asking whether they are comfortable with "US hours."

Use these questions in the interview:

  • Which hours can you consistently reserve for this team?
  • What changes when the US clocks move?
  • Are any required meetings outside your proposed workday?
  • How would you flag a schedule conflict before it affects delivery?
  • If you work from another location, how will you keep the agreed coverage?

Treat the answers as part of role fit. Resolve a conflict before the offer, while you can still adjust a meeting or reconsider the schedule.

Test overlap against a real React task

Choose a task similar to the work the hire will own. For example, use a form change that needs a design decision and an API response update.

Walk through the handoffs. Who answers a question about validation? Who reviews the component? When can the backend engineer discuss an unexpected response?

Ask the candidate how they would leave the task ready for review before signing off. A useful handoff might include the pull request, test results and the exact decision still needed.

This exercise tests how the candidate uses shared time. It also exposes a team problem: the new hire may be available while the required reviewer is booked all afternoon.

For a senior hire, include ownership questions. Ask how they would keep a release moving when a teammate is absent, and when they would stop to seek approval. Avoid rewarding a promise to remain online indefinitely.

Agree on response expectations

Shared hours should not imply that every message needs an instant answer. Tell the candidate which channel carries urgent blockers and where routine questions belong. Name the person who decides whether an issue can wait.

Agree on how the developer signals focused work during the shared window. Your team should know when to expect a reply without requiring constant chat activity.

Use the same expectations for existing teammates. If the developer must respond to a blocked review, the reviewer should also know when they need to respond. Record who takes over when either person is absent.

At sign-off, ask for enough context that another engineer can continue. That includes what changed, what passed, and what still needs a decision. A status message that only says "in progress" leaves the next person guessing.

Check holidays before setting release dates

A shared clock does not guarantee a shared working day. Ask which public-holiday calendar applies to the hire and how approved leave appears on the team's calendar.

The Opus LatAm holiday planner can help you compare dates. Confirm the calendar for the actual hire before committing a release or customer deadline.

Keep a backup reviewer for work that must move during an absence. If the developer owns a release step, document how someone else can perform it.

Do not solve holiday gaps by assuming the hire will work through them. Ask the provider how the proposed arrangement handles holiday work and agree on coverage beforehand.

Put the agreement somewhere the team can use

Record the schedule in the role requirements, offer documentation and shared team calendar. Keep the wording consistent.

Include the controlling city time zone and explain what happens when clocks change. Name who approves a recurring schedule change and how much notice the team expects.

After the hire starts, review whether the agreed window actually supports the work. Look for pull requests waiting overnight, missed decisions and meetings that repeatedly run beyond the developer's day.

If those problems appear, examine meeting placement and reviewer availability before asking for more hours. A longer window will not fix a handoff that nobody owns.

Where does Opus fit for a US engineering team?

Opus reports: "Every Opus placement works with US timezone overlap." Treat that as the starting point for a candidate-specific schedule. Ask which hours the finalist will share with your team and how that window changes across the year.

The client chooses the finalist and manages day-to-day work. That makes your engineering manager's schedule requirements part of the hiring decision. Review the working arrangement alongside the Opus hiring process.

Opus charges one flat monthly rate per hire. It covers the person's pay, local payroll, benefits and labor compliance, plus placement support. There is no separate recruiting fee. The rate depends on role, seniority and location. Published dollar rates: Not published. Ask for a written quote for your role. Opus pricing.

For this decision, make the quote and schedule describe the same job. If the role needs late release coverage, include that requirement before reviewing candidates. If a morning shared window is enough, say so rather than asking for a broader shift by default.

Send the React role description with the US team's city and its required meeting times. Add the review workflow and any duties that must happen live.

When you meet a finalist, confirm the schedule directly. Ask them to walk through a normal workday and explain how they would hand off an unfinished task. Compare that answer with the written proposal before you commit.

Talk to Opus about your React hiring schedule.

<!-- Not saved to disk: the workspace is read-only. Actual candidate schedules and holiday coverage still need confirmation. -->

How should I compare time zones before I hire full time developers?

Start with the US city where the hire's closest teammates work. Compare both cities' working hours in winter and summer, then subtract breaks and other unavailable periods. Put the agreed shared window in the role requirements before interviews.

Which nearshore locations fit a New York engineering team?

For matching local 9-to-5 schedules, Bogotá has eight hours of overlap during US standard time and seven during daylight time. Buenos Aires and São Paulo have six and seven, respectively. These are clock-based comparisons before breaks. IANA time-zone data

Which Latin American cities fit a San Francisco or Los Angeles team?

Tijuana shares Pacific clock changes and has eight hours of overlap for matching local 9-to-5 schedules. Mexico City has six hours during US standard time and seven during daylight time. Confirm the candidate's actual schedule before treating either as available working time. IANA time-zone data

Does full-time employment mean a developer works my entire US day?

No. Full-time describes the work arrangement; it does not specify a shared schedule. Agree on start and finish times, breaks, required meetings and any release coverage separately.

How does daylight saving time change overlap with LatAm developers?

When a US city changes its clocks and the developer's city does not, their relative schedules shift. Mexico City does not observe DST. Tijuana follows US DST dates. Check each city instead of assigning one rule to a country. IANA time-zone data

What should a React developer resume or portfolio show about remote work?

Look for examples of code review, written handoffs and work with product or design colleagues. Ask the candidate to explain a blocked task and how they resolved it across schedules. Confirm working hours directly; a resume cannot establish current availability.

How much overlap should I require from a senior React developer?

Set the requirement from the role's dependencies. A developer who pairs with teammates and handles release issues needs shared time for those tasks. A role with well-defined tickets may use more independent work time. Map a real sprint before choosing a minimum.

Should the best React developer's location outweigh their technical skills?

Treat schedule fit as a requirement alongside technical skills. If a strong candidate misses a required meeting window, decide whether the team can move it. Avoid accepting a schedule that depends on routine late-night work the candidate has not agreed to.

Which tools help a React team manage time-zone overlap?

Use a shared calendar with city-based time zones, documented working hours and a clear pull-request handoff. Add holiday calendars and name a backup reviewer. Choose tools your team already uses before adding another scheduling system.

How should we handle public holidays across countries?

Agree on the calendar that applies to each hire and review it before setting release dates. Keep public holidays, approved leave and company closures visible to the team. Assign backup owners for work that cannot wait until the hire returns.

Sources for this entry

  1. IANA time-zone database: North America
  2. IANA time-zone database: South America
  3. Opus LatAm holiday planner
  4. Opus hiring process
  5. Opus pricing

Figures about Opus are company-reported and attributed to Opus. Other figures link to their source.

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Cite this entry

Best React JS Developers. “How to hire full time developers with US time-zone overlap.” Opus Research. Last updated . https://bestreactjsdevelopers.com/time-zone-overlap/

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