Staff Solution Engineer

About Coupang

Coupang is dedicated to delivering outstanding customer experiences, consistently inspiring customers to say, “How did I ever live without Coupang?” Originating from a passion to simplify shopping, dining, and daily living, Coupang disrupts the multi-billion-dollar commerce market and maintains a strong reputation as a leading and reliable player in South Korean commerce. Combining a startup mentality with the backing of a large global public company allows Coupang to grow rapidly and introduce innovative services. The company encourages entrepreneurial spirit, driving new initiatives and innovations while fostering daily growth for individuals and teams alike.

Role Overview

As part of the Ecommerce Engineering team, your mission is to create excellent customer experiences, ensure service excellence, and support significant revenue growth. The team builds scalable, extensible architectures to facilitate rapid business expansion, develops high-performance, resilient backend systems to manage growing customer demands, and establishes stable, fault-tolerant mechanisms ensuring superior customer satisfaction. Committed to innovation, the team pursues disruptive products and robust platforms using top talent and cutting-edge technology.

Key Responsibilities

• Conduct thorough web protocol analysis and reverse engineer parameters to enhance solution capabilities.
• Continuously develop and refine device attack and defense techniques while exploring automated adversarial system construction.

Required Qualifications

• Bachelor’s degree or higher in Computer Science, Software Engineering, Information Security, or related disciplines with a minimum of three years practical experience in Android or iOS reverse engineering.
• Proven successful experience in reverse engineering leading websites (e.g., social media, e-commerce, finance), capable of independently performing decompilation and logical analysis.
• Strong logical thinking and problem-solving expertise, with the agility to identify and resolve technical challenges during reverse engineering.
• Information security certifications such as CEH or OSCP, or contributions to open-source reverse engineering tools are advantageous.
• Excellent communication and documentation skills to clearly articulate findings and work collaboratively within the team.

Preferred Skills and Experience

• Proficiency in JavaScript reverse engineering, including Abstract Syntax Tree (AST) analysis using Babel Parser, and familiarity with common JS obfuscation and deobfuscation methods.
• Experience with browser debugging (Chrome DevTools), automation frameworks like Puppeteer or Playwright, and knowledge of Chromium kernel modifications.
• Understanding of web anti-scraping strategies such as browser fingerprinting, TLS fingerprinting, and human-machine verification tools (CAPTCHAs including click/slider CAPTCHA, reCaptcha, Akamai).
• Familiarity with application layer protocols including HTTP and WebSocket, skilled in network packet capture and analysis using tools like Charles and Wireshark.
• Knowledge of encryption algorithms such as RSA, AES, HMAC, and interface signature mechanisms.
• Web security expertise, including experience identifying and exploiting OWASP Top 10 vulnerabilities and understanding of Web Application Firewall (WAF) protections.
• Proficient in programming with Python and Node.js to develop automation tools independently.

Recruitment Process

• The hiring process includes application review, a phone interview, followed by onsite or virtual onsite interviews, and finally an offer.
• The process may vary depending on the position and scheduling requirements.
• Communication regarding interview schedules and outcomes will be sent to the candidate’s provided email.

Additional Information

• This position is open to Singapore Citizens and Permanent Residents only.
• Job postings may close early if openings are filled.
• Coupang reserves the right to withdraw an employment offer if false information is discovered during application.
• Candidates eligible for employment protection (e.g., veterans, persons with disabilities) may receive preferential hiring treatment according to law.
• Job titles and responsibilities might change based on overall candidate experience and will be communicated prior to an offer.
• Hiring may be limited if candidates do not meet legal qualifications for employment.

Privacy Notice

Your personal information will be managed by Coupang in accordance with their Application Privacy Notice.