Backend Engineer

Job Overview:

We are seeking an experienced JavaScript Reverse Engineer with deep expertise in reverse engineering obfuscated JavaScript code and bypassing modern web security techniques. This role requires a strong background in both JavaScript and Python, as well as advanced knowledge of browser automation and fingerprinting bypass techniques.

Key Responsibilities:

• Reverse engineer and deobfuscate JavaScript code and APIs for web scraping.
• Bypass popular anti-bot solutions such as Akamai, Datadome, Incapsula, Cloudflare and PerimeterX.
• Work with fingerprinting bypass methods, including TLS and Canvas fingerprinting.
• Reverse engineer and bypass JS Virtual Machine Protection (VMP) techniques.
• Implement custom Captcha solving solutions, utilising frameworks such as YOLO v8 or EfficientNet.
• Employ advanced browser automation techniques to optimise performance while bypassing web fingerprinting methods.
• Work with network engineering principles and have an in-depth understanding of the TCP/IP stack.
• Utilise MITM (Man-in-the-Middle) techniques to inspect and analyse Android app network traffic for scraping purposes.
• Leverage Python for scripting, automation, and integration with reverse engineering tasks.

Required Skills and Qualifications:

• 5+ years of experience with JavaScript and Web Scraping.
• Proven expertise in reverse engineering obfuscated JavaScript code and APIs.
• Strong knowledge of bypassing anti-fingerprinting techniques, including TLS and Canvas fingerprinting.
• Prior experience in overcoming anti bot solutions like Akamai, Datadome, Incapsula, and PerimeterX.
• Adequate understanding of JavaScript Virtual Machine Protection (JS VMP).
• Experience with custom Captcha solving solutions such as YOLO v8 or EfficientNet.
• Expertise in browser automation for efficient bypass of fingerprinting.
• Solid foundation in network engineering, with deep knowledge of the TCP/IP stack.
• Experience in using MITM techniques to inspect network traffic, especially for Android apps.
• Proficiency with containerisation and orchestration tools like Docker and Kubernetes.

Preferred Qualifications

• Experience working with security research and web vulnerability assessments.
• Familiarity with web scraping ethical guidelines and best practices.
• Strong collaboration skills and ability to work in an agile team.

• Python knowledge: object-oriented programming: inheritance, abstract classes, dataclass, dependency injection, design patterns: comand-query, repository, adapter, hexagonal architecture, swagger/Open API, flask, connexion
• Experience on AWS services: lambda, ecs, sqs, s3, dynamodb, auroradb
• Experience with following libraries boto3, behave, pytest, moto, localstack, docker
• Basic knowledge about terraform, gitlab ci
• Experience with SQL DB

Your Opportunity

• Own and drive business features into tech requirements
• Design & develop large scale real time server side systems
• Quickly create quality prototypes
• Staying updated on emerging technologies
• Ensuring that all deliverables adhere to our world class standards
• Promote coding best practices
• Mentor and develop junior developers in the team

Required Experience:

• 4+ years of relevant experience as described below
• Excellent grasp of Core Java, Multi Threading and OO design patterns
• Experience with Scala, functional, reactive programming and Akka/Play is a plus
• Excellent understanding of data structures and algorithms
• Solid grasp of large scale distributed real time systems
• Prior experience on building a scalable and resilient micro service
• Solid understanding of relational databases, NoSQL databases and Caching systems
• Good understanding of Big Data technologies such as Spark, Hadoop is a plus
• Experience on one of AWS, Azure or GCP

Who you are :

• You have excellent and effective communication and collaborative skills
• You love problem solving
• You stay up to date with the latest technologies and then apply them in real life
• You love paying attention to detail
• You thrive in meeting tight deadlines and prioritising workloads
• Ability to collaborate across multiple functions

Education:

Bachelor’s degree in Engineering or equivalent experience within the field

Required Knowledge and technical skills:
- Expert level experience designing and building web services using Java
- Hands on experience in frameworks like struts , springs, hibernate
- Experience with multiple database platforms
- Experience with high volume, mission critical applications
- Experience building distributed systems at Internet scale
- Knowledge of commonly used design patterns
- Prior experience building internet platforms from the ground up
- Understanding Microservices patterns and architectures, enterprise design and industry best practices.

Required Qualities/ personal skills:
- Strong written and verbal communication skills
- Strong interpersonal skills and time management skills
- Strong analytical and troubleshooting skills
- Experience working in an Agile environment
- Experience working in a fast-paced delivery environment

Demonstrated experience in Development, unit test application modules based on specified design using PHP, AngularJS, NodeJS, HMTL5, CSS, J2EE/DB2 technologies using Agile Methods