Senior SDK Engineer for Remote Data Infrastructure Startup

We are partnered with a fast-growing international data infrastructure startup building next-generation solutions for large-scale web data collection. Their technology powers global proxy networks, SERP APIs, and AI-based automation tools used by top data teams worldwide. This fully remote company is backed by strong traction in the web intelligence and proxy infrastructure space, delivering 100% ethical, GDPR-compliant data access for clients in cybersecurity, market research, SEO, and eCommerce and looking for Senior SDK Engineer to join the team remotely from Poland or the EU.

Whom are we looking for – Senior SDK Engineer

Location: Poland or EU, remote work mode

Brief company description

We’re an international remote-first team creating next-generation infrastructure for web data access, proxy management, and automation. Our SDK empowers app developers to provide alternative payment options – allowing users to share small portions of computing resources instead of paying with money or watching ads. It already supports millions of active users worldwide.

Why is it worth joining this company?

1. Cutting-Edge Tech Stack: Build multi-platform SDKs spanning Android, iOS, Windows, and Smart TV environments.
2. Massive Scale: Your code will run on millions of devices globally—impacting both end users and developers.
3. Freedom to Create: Full ownership, flexible schedule, and autonomy to design, experiment, and innovate.
4. Fast Growth, Real Impact: Every feature you build directly affects our core business model and user experience.
5. Remote-First Culture: 100% remote setup with a highly collaborative, async communication style.

Senior SDK Engineer – Key Responsibilities

• Maintain and enhance our existing SDKs across multiple platforms: Android/FireOS (Kotlin), Tizen/WebOS (JavaScript), Windows (C++), iOS (Swift).
• Develop new features and capabilities for the SDK based on business requirements and partner feedback.
• Collaborate closely with cross-functional teams (backend, infrastructure, product) to improve SDK performance, reliability, and user experience.
• Research and implement optimizations to minimize resource consumption while maximizing efficiency.
• Design and implement robust testing strategies for multi-platform SDK releases.
• Create and maintain comprehensive documentation for internal teams and external partners.
• Investigate and resolve complex platform-specific issues across different operating systems and devices.
• Drive architectural decisions for SDK design patterns and cross-platform functional compatibility.

Senior SDK Engineer – Main requirements

• 4+ years of experience in software engineering with a focus on SDK or library development.
• Proficiency in at least one of our primary languages: Kotlin (strongly preferred), JavaScript or C++, with willingness to learn others.
• Experience with mobile and/or TV platform development.
• Strong understanding of memory management, threading, and performance optimization across different platforms.
• Experience with SDK distribution mechanisms (package managers, build systems, dependency management).
• Ability to quickly learn new programming languages and platforms.
• Strong debugging and troubleshooting skills across multiple environments.
• Good written communication skills for documentation and cross-team collaboration.
• Self-directed and comfortable working in a fast-paced startup environment.

Bonus Points

• Highly preferred bonus is familiarity with JavaScript/TypeScript for smart TV platforms (Tizen, WebOS).
• Experience with resource monitoring and optimization techniques.
• Knowledge of network programming and proxy protocols.
• Understanding of sandboxing and security best practices across platforms.
• Contributions to open-source SDKs or libraries.
• Experience with Swift for iOS development.
• Experience with CI/CD pipelines for multi-platform releases.

Senior SDK Engineer – What is in it for you?

• Competitive salary: $5,000-$7,500/month on B2B contract.
• Performance bonus: Up to 30% annual bonus, awarded in May based on company results and individual impact (eligible after 6 months working in the company).
• Fully Remote Setup – Work from anywhere in the EU time zone + remote work setup compensation
.
• Unlimited Paid Vacation – Work-life balance matters.
• Continuous Learning Allowance ($50/month) – Courses, books, or workshops covered.
• Health & Wellness ($50/month) – For gym, fitness, or self-care.
• Health Insurance – Provided internationally.
• Access to AI & Cutting-edge Tools – Stay at the forefront of data innovation.

The Next Step for you:

Is it a new challenge for you? If you want to become a valuable part of this project, please apply via the contact form below.

Itentio IT Recruitment privacy and equal opportunity statements:

By submitting the recruitment application, you consent to the processing of your personal data contained therein. The controller of your personal data is Vladyslav Muzhylivskyi operating under the business name Vladyslav Muzhylivskyi Itentio with its registered office in Kraków (Tax ID: 6751522794). Personal data will be processed in order to carry out the recruitment process for the position specified in the job offer, including for the purpose of assessing the qualifications for work in this position. You can withdraw your consent at any time, which, however, does not affect the legality of the processing that was carried out on its basis before its withdrawal. You have the right to request access to your data, to rectify it, delete it or limit its processing, as well as the right to transfer your personal data, the right to object to data processing and the right to lodge a complaint with the supervisory authority for the protection of personal data. Additional information on the processing of personal data is in our Privacy Policy available at https://itentio.com/privacy-policy/.

Please note that all applications are treated with strict confidence. Itentio IT Recruitment will never share your data outside our organization without your written consent. Itentio is an equal-opportunity recruitment company and values diversity at our company. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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