Front-End Developer – Senior

Code n'App

Front-End Developer working on web applications and games maintenance and improvements. Collaborate with internal and partner clients for agile project delivery.

Posted 7/6/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Front-End Development with a strong focus on HTML5, CSS, and JavaScript/TypeScript, while applying best programming practices and agile methodologies to deliver high-quality, maintainable code. Proficient in state management, real-time communication, and REST API integration, with a solid understanding of front-end architecture principles.

Highest-signal resume keywords

HTML5JavaScriptTypeScriptCSS (Flexbox, Grid, Animations)REST API Integration

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Semantic HTML5Advanced CSSJavaScriptTypeScriptState ManagementWebSocketsServer-Sent Events (SSE)Unit TestingIntegration TestingGit

Soft Skills

Team CollaborationProblem Solving

Tools & Technologies

JestTesting Library

Industry Keywords

Agile MethodologiesObject-Oriented ProgrammingDesign PatternsFront-End ArchitectureClean CodeSOLID Principles

Tech Stack

Tools & technologies

JavaScriptJestTypeScript

About the role

Key responsibilities & impact

The Front-End Developer will participate in a maintenance and improvement project for web applications and games using HTML5, JavaScript and/or TypeScript.
You will have the opportunity to work internally or with partner clients, contributing across the entire lifecycle, from conception to deployment, using agile methodologies to deliver an efficient solution.
We expect this person to:
- Contribute to the project’s success and the team’s growth;
- Know best programming practices for the technologies used;
- Write clean, high-quality, maintainable code;
- Program with an object-oriented approach.

Requirements

What you’ll need

Strong knowledge in:
- Semantic HTML5, advanced CSS (Flexbox, Grid, animations) and JavaScript/TypeScript
- State management in applications with high update frequency
- Real-time communication using WebSockets and/or Server-Sent Events (SSE)
- Consuming and integrating REST APIs, including error handling, authentication and session state management
- Design patterns and front-end architecture principles (clean code, SOLID, componentization)
- Unit and integration testing (Jest, Testing Library or similar)
- Git with a collaborative workflow (PRs, code review, branching)
- Basic back-end knowledge sufficient to communicate with the team and understand API contracts

Benefits

Comp & perks

Flexible hours and remote work options;
No dress code;
Gympass;
Mental health support (in partnership with Psymeet);
Celebration of important dates (your birthday, Code n’ App anniversary, etc.);
Day off on your birthday;
Free access to the Udemy platform;
A great benefits club offering discounts across categories such as food, travel, educational institutions, etc.;
Indica Code referral program – refer a friend and receive a R$500.00 bonus for each hired candidate;
Newborn gift basket;
Financial advisory and education;
Opportunity to join a team of experts with extensive experience to share;
All our positions are open to people with disabilities!