Oscilar

Sr./Staff JavaScript Developer - Web SDK (Brazil)

Oscilar
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6 months ago
Remote, BrazilSenior / Staff+
H1B Sponsor

Responsibilities

  • Lead development and maintenance of a high-performance Web SDK that collects and analyzes browser and device data.
  • Design algorithms for device fingerprinting and behavior-based insights from gestures, keyboard interactions, and mouse interactions.
  • Build and maintain automated cross-browser testing, continuous integration, continuous delivery, and release processes.
  • Optimize SDK performance and resource usage across browsers and devices.
  • Embed data privacy and security principles into the SDK’s design and implementation.
  • Conduct code reviews, mentor junior engineers, and promote maintainable, documented code.
  • Collaborate with product managers, designers, QA engineers, and other cross-functional teams.
  • Drive browser-based solutions for risk, fraud detection, and device analytics.

Requirements

  • Bachelor’s degree in computer science, software engineering, or a related field, or equivalent experience.
  • At least 8 years of web development experience, including at least 3 years building and maintaining SDKs.
  • Proficiency in JavaScript, TypeScript, Git, and modern build tools such as Webpack, Babel, or Rollup.
  • Extensive experience designing and maintaining Web SDKs or libraries for data collection, tracking, or analytics.
  • Deep understanding of browser environments, browser APIs, browser-related data, and cross-browser compatibility.
  • Knowledge of data privacy, encryption, hashing, and obfuscation techniques.
  • Understanding of server-side technologies and APIs for data retrieval and storage.
  • Proven open-source contributions or relevant work showcased on platforms such as GitHub.
  • Preferred experience with AI-driven analytics, risk systems, fraud prevention technologies, JavaScript SDKs, gestures, interaction data processing, or high-scale distributed environments.

Benefits

  • Remote-first culture with work-from-anywhere flexibility.
  • 100% employer-covered comprehensive health, dental, and vision insurance for employees and dependents in the US.
  • Unlimited PTO policy.
  • Regular team events and offsites in a family-friendly environment.
  • Professional development and learning opportunities.
  • Competitive salary and equity packages, including a 401(k).

Tech Stack

Categories

Oscilar

About Oscilar

201-500 employees

Oscilar powers real-time risk decisioning across fraud, credit, and compliance with a single, unified solution. Our no-code AI Risk Decisioning™ platform leverages agentic AI and advanced signal processing to analyze complex data, detect anomalies, and automate mission-critical decisions with speed and precision. Built by the team behind risk systems at Google, Meta, Uber, Citi, and J.P. Morgan, Oscilar combines deep technical expertise with cloud-native architecture to deliver scalability, transparency, and regulatory-grade performance.