JavaScript Development Services

JavaScript Experts. From First Commit to Full Scale

React, Node.js, and NestJS solutions powering platforms across fintech, healthcare, eCommerce, and beyond.

Why Choose Us

JavaScript depth across every product layer

We've shipped JS across countless projects in fintech, healthcare, eCommerce, and sports: on time and on budget.

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End-to-End JS Expertise

From React and Next.js on the front end to Node.js and NestJS on the back end, our teams deliver cohesive, high-performance JavaScript across the entire stack.

Rapid Delivery, Zero Corners Cut

Our nearshore teams move fast without sacrificing quality. We ship clean, maintainable code and participate fully in your Agile ceremonies from day one.

Seamless Integration

We specialize in connecting JavaScript applications to complex APIs, third-party services, legacy systems, and cloud architectures built on AWS and Azure.

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Our Proven Track Record

Delivering Results

Financial Services
IFI Network

Designed and built a white-label banking-as-a-service platform from scratch that connects businesses with minority-owned banks—now tracking toward the user and investment milestones needed for a strategic exit.

Agency
DirectAvenue

Built the DA Apollo media buying platform from the ground up using a modern cloud-native stack, empowering a data-driven TV agency to plan, optimize, and attribute campaigns at scale.

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Mastering the JavaScript Universe

Deep expertise across frameworks, tools, and runtimes.

Front End Frameworks

Expert-level React and Next.js development, including server-side rendering, component libraries, state management, and pixel-perfect UI built to design specs.

Backend & API

We build scalable Node.js and NestJS backends with REST and GraphQL APIs, integrating with databases like PostgreSQL, MySQL, and MongoDB for reliable data delivery.

DevOps & CI/CD

Automated testing with Jest and Cypress, containerized deployments via Docker, and streamlined CI/CD pipelines on AWS and GitHub Actions are core to our delivery model.

State & Data Management

Deep experience with Redux, MobX, Apollo Client, and Prisma to keep JavaScript applications fast, predictable, and maintainable as they scale across teams and features.

Why First Factory

The Competitive Difference

For more than 25 years, we have partnered with companies to accelerate go-to-market, improve user outcomes, and deliver tangible business results.

Time Zone Alignment

Costa Rica is 1–2 hours behind Eastern Time. No 12-hour lag, no async-only collaboration. Our teams communicate in real time and attend your standups live.

Security Posture Built In

SOC 2 Type 2 certified. Full MDM device management. Background checks for every hire. Dedicated full-time IT Security Officer. Your IP is protected.

Design + Engineering Under One Roof

Our Costa Rica design team handles UX/UI for client projects, keeping design and development tightly coordinated. There are no handoff gaps or delays iterating.

No Long-Term Lock-In

No minimum contract length on resources. We require written notice to ramp down based on contract terms. You scale based on your needs, not our revenue targets.

Our Guarantee

If  you're unsatisfied — for any reason — at any point during the first 30 days of your project, you can walk away on the spot. No penalties, no questions asked.

25+
Years of experience
175+
Full-time employees
3+ years
Average client tenure
5X
Inc. 5000 Honoree
Engagement Models

Your needs, your way of working.

The right engagement model reduces risk, accelerates delivery, and lowers total cost.

Staff Augmentation

Dedicated full-time engineers who become a natural extension of your team, working in your time zone and integrating into your existing workflows.

Handpicked for ideal fit
Complete transparency
Your team may interview candidates
Engineering Manager oversight
Adapts to your processes
100% committed to you
40hrs per week, billed hourly
30-Day Satisfaction Guarantee
Scrum Teams

Self-organizing, collaborative teams who deliver high-quality software in two-week sprints with complete transparency and regular stakeholder engagement.

Complete project management
Engineering architecture
Scalable engineering team
QA Resources
Pick & choose Agile ceremonies
Exceptional communication
Seamless integration with your team
Flexibility to pivot as needed
Milestone-Based Projects

Fixed-price custom development with guaranteed pricing, clearly defined scope, and dedicated project management from concept to post-launch support.

Clear up front scope defined
Fixed price, billed in 3 installments
Fully independent team
Complex challenges tackled first
High transparency & alignment
Structured UAT window
Post-release support
Easy transition to maintenance
Specialized Services

Assisting you with strategy, implementation, and maintenance

We offer packages that help you achieve business outcomes and provide long-term product support.

Consulting

Expert guidance to evaluate software solutions, compare build vs. buy options, and optimize your development processes through strategic analysis and recommendations.

Service Contracts

Ongoing maintenance and support agreements available as fixed-price annual contracts or hourly arrangements with specific SLAs tailored to your post-launch needs.

Frequently asked questions

Everything you want to know clearly explained

How does your 30-day guarantee work exactly?

We offer a 30-day satisfaction guarantee. If you’re not satisfied with our work at the end of the first 30 days, you can replace a resource or ramp down the project without being charged.

Do you do fixed-price projects?

Yes. Fixed-price engagements are available when scope and timelines are clearly defined. These are often used for pilots, discovery phases, or well-scoped initiatives.

How quickly can you start working on our product?

We can typically assemble a product team within 2 to 6 weeks depending on your specific requirements. For urgent needs, we often have resources available to begin discovery and ideation work even sooner. A Product Discovery Sprint can frequently begin within days of agreement.