Frontend Engineer (JavaScript/ReactJS) - Captcha & SmartID

ABOUT CLIENT

Our client is a top company in internet services and digital content

JOB DESCRIPTION

Improve and expand services
Create and execute Captcha SDK
Carry out research on CAPTCHA technologies using AI

JOB REQUIREMENT

At least 4 years of front-end development experience using ReactJS, Next.js, JavaScript, and HTML/CSS
In-depth knowledge of JavaScript and core web technologies
Practical experience in cross-browser and cross-device development
Enthusiasm for discussing frontend system stability and scalability
Strong grasp of asynchronous request handling, AJAX, Node.js, and SSR
Understanding of data structures, algorithms, and distributed service architecture
Familiarity with front-end performance optimization and debugging tools (e.g., Chrome, Safari DevTools)
Proficiency in CI/CD pipelines and unit testing frameworks
Proven track record of collaborating across multiple teams to deliver high-quality products
Prior experience in developing SDKs or CAPTCHAs, or a strong willingness to learn
Familiarity with integrating code obfuscation and protection techniques into client-side applications
Background in developing video content platforms, especially short-form or media-rich services
Experience working on large-scale, high-traffic frontend systems

WHAT'S ON OFFER

Work-life balance: Access to offices in central locations with flexible working options, as well as increasing annual leave entitlement based on years of service.
Competitive income package: Annual performance reviews and bonus incentives available.
Learning and development opportunities: Budget allocations for language and technology learning, as well as a monthly book budget.
Healthcare plan: Premium health insurance for employee and two family members, annual health checks, and premium gym membership.
Employee engagement activities: Support for team engagement activities within a positive and enjoyable work environment.
Additional benefits: One-time allowance for setting up a home office, as well as work dedication bonuses.

CONTACT

PEGASI – IT Recruitment Consultancy | Email: recruit@pegasi.com.vn | Tel: +84 28 3622 8666
We are PEGASI – IT Recruitment Consultancy in Vietnam. If you are looking for new opportunity for your career path, kindly visit our website www.pegasi.com.vn for your reference. Thank you!

Job Summary

Company Type:

Product

Technical Skills:

Frontend, Javascript, ReactJS

Location:

Ho Chi Minh - Viet Nam

Working Policy:

Salary:

Negotiation

Job ID:

J00775

Status:

Close

Related Job:

Senior Signal Processing Engineer

Others - Viet Nam

Outsource

  • Python

Design and improve rPPG/TOI pipelines using RGB/IR video with motion/illumination compensation. Implement multi-stage preprocessing, denoising, and quality scoring. Examples: adaptive filtering, ICA/PCA variants, color-space transforms, skin ROI stabilization, signal confidence metrics. o Build cross-device normalization strategies and error-bounded estimators. Define biomarker-level acceptance criteria and failure modes for consumer-grade capture. Partner with iOS and ML teams to integrate algorithms into on-device or hybrid pipelines. Produce technical documentation suitable for regulatory-risk positioning and Apple review support. Benchmark report across device models, skin tones, lighting, and motion conditions. Biomarker feature specification sheet with recommended thresholds and confidence bands. A/B results showing improvements in stability, missingness, and downstream inference performance.

Negotiation

View details

Senior Mobile App Development Engineer

Others - Viet Nam

Outsource

  • iOS

Develop and enhance capture flows using TrueDepth, ARKit, AVFoundation, and CoreMotion. Convert algorithm requirements into reliable on-device data collection and frame synchronization. Create user-friendly quality control interface and capture-state instrumentation, including tasks such as lighting checks, face alignment, motion thresholds, occlusion detection, and retake prompts. Improve latency, thermal behavior, and battery usage for 10-second diagnostic-style capture. Ensure data privacy and compliance with privacy regulations in telemetry. Create technical documentation for the use of specific APIs and data handling for Apple's internal use. Build a modular capture SDK layer with feature flags and logging capabilities. Develop a cross-device performance matrix and tuning guide. Integrate deterministic quality control gates to minimize noisy biomarker outputs in the capture process.

Negotiation

View details

Senior Software Engineer, Machine Learning

Ho Chi Minh - Viet Nam

Product

  • Machine Learning

Building and maintaining high-scale ML pipelines using big data technologies (Spark, BigQuery, Delta Lake), writing reliable, testable, and maintainable production-ready code. Leveraging modern ML platforms like Vertex AI or Databricks to orchestrate workflows and optimizing models for both batch/offline training and real-time/streaming inference with a focus on low latency. Gaining a deep understanding of specific domain challenges (e.g., fraud detection, location spoofing) to engineer better features and network-level intelligence that go beyond algorithms. Championing best practices in software engineering, including CI/CD, automated testing, code reviews, and documentation to ensure ML systems are built to software engineering standards, not just research scripts. Acting as a technical lead for projects, defining milestones and ensuring on-time delivery, mentoring Data Scientists on engineering best practices, and collaborating with other engineers to integrate models into the wider platform.

Negotiation

View details