Senior Software Engineer - Mobile Reverse Engineer

at  Sauce Labs Inc

ABOUT US:

Sauce Labs is the leading provider of continuous test and error reporting solutions that give companies the confidence to develop, deliver and update high quality software at speed. The Sauce Labs Continuous Testing Cloud identifies quality signals in development and production, accelerating the ability to release and update web and mobile applications that look, function and perform exactly as they should on every browser, operating system and device, every single time. Sauce Labs is a privately held company funded by TPG and Riverwood Capital.

REQUIRED SKILLS:

• Golang + Java or Kotlin
• Reverse engineering and debugging skills (smali code, wireshark, hopper disassembler…)
• Android and/or iOS system internals and communication protocols knowledge (AOSP, Device Owner, MDM profiles, usbmuxd, adb protoco, aapt)
• Linux and Unix based system knowledge, k8s, docker…

EXTRA SKILLS:

• Mobile app development knowledge
• Objective C / Swift knowledge
• DevOps knowledge: docker containers, kubernetes, ansible, terraform
  We are a hybrid workplace that recognizes the importance of flexibility while valuing in-person collaboration and relationship building. As a result, Saucers located near an office location must be able and willing to come into the office. Those hired remotely must be able and willing to travel to an office as required by the specific role.
  Security responsibilities at Sauce: At Sauce, we will commit to supporting the health and safety of employees and properties, partnering with internal stakeholders to learn and act on ever-evolving security protocols and procedures. You’ll be expected to fully comply with all policies and procedures related to security at the department and org wide level and exercise a ‘security first’ approach to how we design, build & run our products and services.
  Sauce Labs is proud to be an Equal Opportunity employer and values diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender identity/expression/status, sexual orientation, age, marital status, veteran status or disability status.
  Please note our privacy terms when applying for a job at Sauce Labs

THE ROLE:

The Mobile Device Infrastructure team is one of the most important core teams in our real device infrastructure product line. It doesn’t only maintain our real device fleet in a healthy state which is essential to our customers, but it also offers services and abstractions used by other teams to interface with the fleet and the individual devices. Both are embodied in complex and challenging problems that require exceptional reverse engineering and backend skills.
Through the gathered knowledge thanks to constant experimentation required to allow us to keep up with the rapidly changing mobile hardware, API and OS landscape, the team is able to play an important role in enabling others by providing best-in-class internal solutions, tools and knowledge, even outside of its business domain.
Being in an ever pivoting team, your responsibilities will change and evolve a lot through time. Nonetheless, we maintain context and scope throughout the lifecycle of a project. This allows for a focused yet fun work environment with plenty of learning opportunities.

As a Senior Reverse Engineer you will:

• Write, maintain and review mobile agents (iOS and Android) and Backend services.
• Hack kernels and patch binaries. Decompile mobile apps and frameworks to patch them and change their default behavior.
• Discover and use hidden mobile OS apis and protocols such as usb or network traffic to leverage it in managing our real device fleet.
• Alter the behavior of mobile devices to adapt them to our lease based use-case.

RESPONSIBILITIES:

• Improve device availability by mitigating device specific issues.
• Optimize device fleet management performance by tweaking device allocation and cleanup processes.
• Enhance system designs and work with architects to address team and system health issues.
• Expose and maintain metrics to ensure data driven decision making.
• Own the solution end to end, from mobile agents, backend services and eventually frontend implementations including maintaining own CI/CD pipelines.
• Set a high standard for code quality and best-practice.