23 Ofertas de React en Costa Rica

Experience Remote done Right. Over 20 years of remote experience, all 500+ staff are 100% remote and we still grow vibrant relationships, provide exceptional opportunities for career growth while working with stellar clients on ambitious projects

What we're working on:

Enterprise companies turn to us to help them launch innovative digital products that interact with hundreds of millions of customers, transactions and data points. The problems we solve every day are real and require creativity, grit and determination. We are building a culture that challenges norms while fostering experimentation and personal growth. In order to grasp the scale of problems we face, ideally, you have some exposure to Logistics, FinTech, Transportation, Insurance, Media or other complex multifactor industries

Requirements

• 10+ years of professional experience (A technical assessment will be required)
• Extensive experience with Javascript, React, Redux, Websockets, Async/Await
• Proven track record of managing teams and projects effectively
• Ability to create clean, modern, testable, well-documented code
• Advanced English fluency, verbal and written
• Professional, empathic, team orientated
• Problem solver, proactive, go-getter

Why Lumenalta is an amazing place to work at

At Lumenalta, you can expect that you will:

• Be 100% dedicated to one project at a time so that you can innovate and grow.
• Be a part of a team of talented and friendly senior-level developers.
• Work on projects that allow you to use leading tech.

The result? We produce meaningful outcomes for our clients that break barriers in their industries.

The job is 100% remote, please make sure you have a comfortable office setup at your desired work location.

Lumenalta is committed to hiring exceptional talent from a wide variety of diverse backgrounds. If you share our values and enthusiasm for digital transformation, we encourage you to apply

What's it like to work at Lumenalta?

Acuity Knowledge Partners is a leading provider of high-value research, analytics and business intelligence to the financial services sector. The company supports over 520 financial institutions and consulting companies through a team of over 6,000 subject matter experts who work as an extension of the clients' teams based out of various global delivery centers.

We EMPOWER our clients to drive revenues higher. We INNOVATE using our proprietary technology and automation solutions. We enable our clients to TRANSFORM their operating model and cost base.

Key Responsibilities

A candidate needs to interact with the global financial clients regularly and will be responsible for final delivery of work including:

• Develop and maintain scalable web applications using
• Lead the design and development of advanced front-end features using
• Collaborate with product managers, designers, and backend engineers to deliver seamless user experiences.
• Architect scalable and maintainable front-end solutions.
• Conduct code reviews and mentor junior developers.
• Optimize applications for speed, scalability, and responsiveness.
• Ensure adherence to accessibility, security, and performance standards.
• Stay current with emerging technologies and propose innovative solutions.

Candidate Profile

• 4+ years of recent experience in front-end development with
• Bachelor's or master's degree in computer science, Engineering, or related field.
• 4+ years of professional front-end development experience.
• Experience working in Agile/Scrum environments.
• Strong problem-solving and debugging skills.
• Excellent communication and leadership abilities
  .

Technical Skills

• Expertise in
  and its core principles.
• Advanced JavaScript
  and
  TypeScript
  proficiency.
• Strong understanding of
  HTML5
  ,
  CSS3
  , and
  SASS/SCSS
  .
• Experience with
  state management libraries
  like Redux, Zustand, Recoil, or Context API.
• Deep knowledge of
  React Hooks
  ,
  Custom Hooks
  , and
  Component Lifecycle
  .
• Familiarity with
  
  or other SSR frameworks.
• Experience with
  RESTful APIs
  ,
  GraphQL
  , and
  WebSockets
  .
• Proficiency in
  unit testing
  and
  end-to-end testing
  using tools like Jest, React Testing Library, Cypress, or Playwright.
• Experience with
  CI/CD pipelines
  and tools like GitHub Actions, GitLab CI, or Jenkins.
• Familiarity with
  containerization
  (Docker) and
  cloud platforms
  (AWS (S3, Lambda), AZURE).
• Understanding of
  Web Performance Optimization
  techniques (lazy loading, code splitting, etc.).
• Familiarity with
  design systems
  (e.g., Storybook,
  Material UI
  , Chakra UI, Tailwind CSS).

Date Opened

09/23/2025

Job Type

Full time

Industry

Technology

Remote Job

This is a remote position.

We are looking for a talented Frontend React Developer to join our team and build high-quality, scalable, and maintainable web applications. The role requires strong React expertise, solid front-end fundamentals, and a good understanding of modern development practices.

Key Responsibilities

• React: Build and maintain scalable, reusable UI components and applications.
• React Router: Implement client-side routing and smooth navigation flows.
• React Query: Manage server state, data fetching, and caching.
• TypeScript: Write clean, type-safe, and maintainable code.
• Testing (Jest + Testing Library): Create and maintain unit and integration tests for components and logic.
• Cloud Native (AWS): Apply AWS services and cloud deployment best practices.

• Frontend Basics:

• Strong knowledge of HTML5, CSS3, and JavaScript (ES6+).

• Experience with responsive design and cross-browser compatibility.
• Understanding of UI/UX principles and ability to collaborate with designers.

• Proven experience building web applications with React and TypeScript.
• Solid foundation in HTML, CSS, and JavaScript.
• Familiarity with state management, routing, and API integration.
• Experience with testing frameworks (Jest, Testing Library).
• Knowledge of cloud environments (AWS) is a plus.
• Strong problem-solving skills, attention to detail, and a passion for clean code.

• Continuous training program
• Talks and workshops on personal and professional growth
• Organizational team building events
• Rewards
• Social Responsibility committee
• Wellness Subsidy
• PTO's
• Developer's day celebration
• Birthday off
• Monthly kudos
• Holiday celebration day off
• 70+ Partnerships with restaurants, hotels, hiking groups, fitness, stores, medical services, psychology services, dental services, universities, pet supply services, pet medical pharmacy chains, events, and car services.

We are looking for a
React Native Engineer
to join our fast-paced, dynamic environment.

You will play a key role in modernizing mobile applications by converting legacy Android apps into high-performance React Native apps for both Android and iOS. This is a unique opportunity to leverage AI-assisted tools to accelerate delivery, ensure cross-platform consistency, and focus on delivering innovation at scale.

Our client operates in the technology space and is currently evolving its mobile app ecosystem. This project includes rewriting an existing oral history collection app, building new features, and creating a new field audits app—delivering a unified, efficient, and maintainable cross-platform experience.

Location:
Must reside and have work authorization in Latin America.

Availability:
Must be available to work with significant overlap with Mountain Standard Time (MST).

*The Ideal Candidate Has: *

• BS/MS in Computer Science, Engineering, or related field with 6+ years of professional software development experience.
• 4+ years of proven React Native experience in production-grade mobile applications.
• Strong mobile development experience for both iOS and Android platforms.
• Expertise in JavaScript/TypeScript and modern front-end development practices.
• Hands-on experience leveraging AI-assisted tools to enhance development productivity.
• Ability to develop performant, scalable, and maintainable mobile applications.
• Strong collaboration skills to work closely with design, product, and engineering teams.
• Excellent communication skills in English (C1 preferred, strong B2 may be considered).

*Key Responsibilities: *

• Rewrite existing Android apps into React Native while ensuring feature parity and optimal performance.
• Collaborate with the engineering team to integrate AI-assisted tooling for efficient migration and development.
• Build and ship new features post-migration to expand the Oral Gen app's capabilities.
• Design and develop a new field audits application from scratch using React Native.
• Ensure seamless and scalable deployment across iOS and Android platforms.
• Work with product and design teams to implement intuitive, user-friendly interfaces.

Senior React Native Engineer – LATAM (Remote)

We're looking for a Senior React Native Engineer to join an AI-powered platform that's transforming construction. From planning to execution, the platform makes work seamless for teams in the field and in the office.

This is initially a 3-month contract with the potential to become a long-term engagement for the right candidate.

You'll take ownership of building high-quality, performant, and scalable mobile apps , collaborate with a remote team, and help shape the future of the platform. If mentoring and guiding best practices excite you, this is your chance to make an impact.

What We're Looking For:

• 4+ years of mobile development experience, strong in React Native
• Proficient in JavaScript/TypeScript and modern mobile architectures
• Experience with REST APIs and third-party integrations
• Comfortable working remotely and independently
• Strong problem-solving skills and good English communication

Nice-to-Have:

• CI/CD pipelines experience
• Android/iOS native development knowledge

Why You'll Love This Role:

• Work on a cutting-edge platform redefining construction with AI
• Fully remote
• Competitive pay with the potential to convert to full-time

If this sounds like a fit, apply now —we're excited to hear from you

Explore the Nearsure experience

Join our close-knit LATAM remote team:
Connect through fun activities like coffee breaks, tech talks, and games with your team-mates and management.

Say goodbye to micromanagement
We champion autonomy, open communication, and respect for diversity as our core values.

Your well-being matters:
Our People Care team is here from day one to support you with everything from time-off requests to wellness check-ins.

Plus, our Accounts Management team ensures smooth, effective client relationships, so you can focus on what you do best.

Ready to grow with us?

Here's what we offer you by joining us

Competitive USD salary – We value your skills and contributions

100% remote work – While you can work from anywhere, you're always welcome to connect with teammates and grow your network at our coworking spaces across LATAM

Paid time off – Take the time you need according to your country's regulations, all while receiving your full salary. Rest, recharge, and come back stronger

National Holidays celebrated – Take time off to celebrate important events and traditions with loved ones, fully embracing your culture.

Sick leave – Focus on your health without the stress. Take the necessary time to recover and feel better.

Refundable Annual Credit – Spend it on the perks you love to enhance your work-life balance

Team-building activities – Join us for coffee breaks, tech talks, and after-work gatherings to bond with your Nearsure family and feel part of our vibrant community.

Birthday day off – Enjoy an extra day off during your birthday week to celebrate in style with friends and family

About the project:

As a
Staff Fullstack React/C# Engineer
, you will be part of a team working to build secure systems for the client ecosystem. You will pursue continuous improvement to help our client achieve its mission: Powering the world's fitness and wellness businesses and connecting them with more consumers, more effectively, than anyone else.

How you'll contribute

Collaborate closely with Product, Design, and QA to iterate on the design, implementation, and deployment of our product.

Build and maintain backend systems and applications.

Seek different perspectives and solicit honest feedback.

Practice engineering best practices (e.g., automated testing, code reviews, proper monitoring).

Take delight in delighting our users.

Care about our studio partners and want to help them grow their business.

This would make you the ideal candidate

Bachelor's Degree in Computer Science, Engineering, or a related field.

8+ Years of experience building backend services with an object-oriented language such as C#.

8+ Years of experience working with designing and architecting backend services.

8+ Years of experience working with designing and working with Microservice architecture.

Solid experience with monitoring (such as New Relic or Kibana).

Familiarity with SDLC, programming design patterns, and Agile methodology.

Experience reviewing new feature impact on an application and recognizing potential risks.

Migrating from monolith to microservices.

Experience working with AWS.

Advanced English Level is required for this role, as you will work with US clients. Effective communication in English is essential to deliver the best solutions to our clients and expand your horizons.

What to expect from our hiring process

1. Let's chat about your experience

2. Impress our recruiters, and you'll move on to a technical interview with our top developers.

3. Nail that, and you'll meet our client - your final step to joining our amazing team

At Nearsure, we're dedicated to solving complex business challenges through cutting-edge technology and we believe in the power of tailored solutions. Whether you are passionate about transforming businesses with Generative AI, building innovative software products, or implementing comprehensive enterprise platform solutions, we invite you to be part of our dynamic team

We would love to hear from you if you are eager to make an impact and join a collaborative team that values creativity and expertise.

Let's work together to shape the future of technology

Apply now

By applying to this position, you authorize Nearsure to collect, store, transfer, and process your personal data in accordance with our Privacy Policy. For more information, please review our Privacy Policy. )

What we're looking for?

Our client, a global firm of IT professional services is looking for a skilled Senior .NET/React developer.

In this role, you'll be instrumental in designing and building scalable, high-performing web applications using .NET and React.

IMPORTANT: this position is open only for candidates based in COSTA RICA.

Key Responsibilities:

• Work closely with the Technical Team Lead and Senior Developers within your team and respond to their guidance and support.
• Attend and contribute to sprint ceremonies including planning sessions, stand-ups and retrospectives.
• Understand our client complex business domain and be comfortable with the existing code-based solutions.
• Ensure that the acceptance criteria of user stories are met and failures in QA are limited.
• Produce high quality code using Test Driven Development.
• Embrace exposure to new architectures, cloud-based infrastructures, microservices and modern ways of working.
• Be able to diagnose issues via debugging, logging and tools like 
  NewRelic
  .
• Must be able to be self-learn and be motivated to understand code written by others.
• Ability/willingness to work with a remote team with minimal cross-over.
• Able to work with business users to identify and resolve production issues.

Qualifications:

• Excellent professional experience of C#, and the .Net Core ecosystem.
• Professional experience with React and test frameworks such as Jest.
• Experience using containerised systems, with some experience with ECS or Kubernetes
• Experience in writing CI/CD pipelines using tools such as GitHub Actions, Tekton, or similar
• Professional experience using JavaScript and TypeScript
• Experience with message-based architecture (SNS/SQS or similar)
• An understanding of relational and NoSQL databases, Postgres and JSON data type preferred
• Test Driven Development
• A good understanding of design patterns and principles e.g. SOLID and GO4 (desirable)
• Experience working in an Agile based project delivery environment
• Ability to refactor code
• Ability to work in a complex and fast-moving domain
• Fluent English.

Desirable

• Familiarity with other data stores, including cloud-based managed offerings
• AWS Cloud (or similar e.g. Azure)
• Experience in building React components based around Bootstrap

Hiring conditions:

• Remote job
• USD payment - contractor hiring modality USD/Hour)

Responsibilities

• Build and maintain high-performance front-end applications using (v13+ App Router), React, and TypeScript.
• Implement server components, client components, and streaming routes for optimal performance and minimal JS delivery.
• Use Tailwind CSS and a component library (e.g., shadcn/ui, Chakra UI) to create consistent, accessible UIs.
• Integrate with RESTful APIs hosted on Azure API Management; leverage server-side data fetching (RSC, Server Actions) for secure and efficient API calls.
• Implement secure authentication and authorization flows with OAuth2/JWT, integrating with Azure AD B2C or equivalent identity providers.
• Protect against client-side vulnerabilities (XSS, injection) using secure patterns and built-in escaping mechanisms.
• Keep dependencies updated and secure with npm audit, Snyk, or similar tools.
• Write and maintain unit tests with Jest/Testing Library and E2E tests with Cypress or Playwright; integrate into GitHub Actions pipelines.
• Participate in PR reviews, mentor junior developers, and guide front-end technical direction (Senior role).
• Collaborate with DevOps on build optimization and Azure deployment strategies (Static, ISR, SSR).
• Document technical approaches, component usage, and security guidelines.

Requirements

Must have:

• Strong experience with , React, TypeScript, and modern React patterns (hooks, context, suspense).
• Experience integrating secure REST APIs and server-side rendering.
• Knowledge of secure authentication (OAuth2/JWT) with Okta or Auth0.
• Familiarity with security best practices and OWASP Top 10.
• Experience with unit and E2E testing frameworks.
• Comfortable with Git workflows and CI/CD (GitHub Actions).

Bonus:

• Experience with React Server Components and Server Actions.
• Azure-optimized deployments using Static Export, ISR, or SSR.

Positions Available:

• 1 Senior, 1 Mid-Level. Senior expected to take a lead/mentor role, review PRs, and help set technical direction as needed.

Objetivo:

Implementar un proceso integral para analizar y registrar con precisión todas las transacciones contables derivadas de las operaciones empresariales, garantizando el cumplimiento estricto de las Normas Internacionales de Contabilidad aceptadas en el país y su correcta integración en el sistema contable.

Nivel académico:

• Bachillerato universitario en computación, ingeniería en sistemas o carrera a fin.

Experiencia:

• 2-4 años de experiencia como front end.
• Programación en Javascript, HTML5, CSS3, Angular y JQuery
• Experiencia en programación orientado a objetos POO. Deseable conocimiento de C# y .Net (Framework y Core)
• Elaborar el front-end respetando los estándares internacionales de la W3C, los lineamientos básicos de usabilidad, diseños responsivos asegurando la adaptación a los diferentes tamaños de pantallas.
• Experiencia con gestión de paquetes en un proyecto Web que utilice NodeJS (NPM)
• Integraciones de api de Google.
• Manejar estándares de la W3C en accesibilidad y código limpio.

Habilidades técnicas:

• Javascript
• Visual Studio
• Angular
• JQuery
• C#
• .Net
• Boostrap
• NodeJs
• Git
• Integraciones Api con Google.

Requisitos adicionales:

• Experiencia trabajando con metodologías ágiles.
• Disponibilidad para laborar de manera híbrida.
• Facilidad de aprendizaje, comunicación y trabajo en equipo.