Software Engineer

🌍 Location: North & South America (preferred), Poland, Ukraine & Eastern Europe
💼 Employment: Full-time | B2B
📅 Duration: 3+ months, potential extension
💰 Rate: Up to $25/hour
🚀 Seniority: Senior / Staff

About the Project

We are looking for an experienced Senior / Staff Software Engineer to join a product engineering team building a SaaS platform focused on marketing attribution, conversion tracking, and real-time data processing.

The primary focus of this role is to design and build a mobile attribution SDK from scratch, alongside developing real-time conversion APIs, tracking integrations, and scalable data pipelines.

This is a hands-on engineering position for someone who enjoys building production-grade products, designing reusable abstractions, and solving complex integration challenges.

What You'll Do

Mobile Attribution SDK (Greenfield Project)

• Design and develop a new mobile attribution SDK from scratch.
• Build and maintain JavaScript and iOS SDK components.
• Develop reliable tracking, attribution, and event collection mechanisms.
• Design reusable SDK architecture with performance, scalability, and maintainability in mind.
• Ensure seamless integration with client applications and backend services.

Conversion API & Real-Time Tracking

• Build and maintain real-time conversion tracking integrations using Python.
• Process tracking signals and forward conversion events to advertising platforms.
• Develop integrations with third-party advertising APIs, handling platform-specific requirements.
• Work with Google Pub/Sub and Shopify JavaScript tracking.
• Ensure data accuracy, reliability, and efficient event processing.

Data Pipelines & Product Engineering

• Design and optimize production data pipelines supporting SaaS product functionality.
• Build backend services and product integrations.
• Contribute to full-stack application features when needed.
• Participate in architectural decisions and technical design discussions.

Requirements

• 5+ years of commercial software engineering experience, preferably at Senior or Staff level.
• Strong production experience with Python.
• Hands-on experience developing JavaScript SDKs.
• Experience building or maintaining native iOS SDKs (Swift / Objective-C).
• Strong SQL skills and experience working with production databases.
• Solid understanding of SDK architecture, API design, event tracking, and asynchronous processing.
• Experience building customer-facing software products, not only internal tools or dashboards.
• Ability to design scalable engineering abstractions and make architectural decisions.
• Experience integrating third-party APIs.
• Strong problem-solving skills and ability to work independently.
• Fluent English for technical discussions and collaboration.

Nice to Have

• React Native SDK development experience.
• Android SDK development (Kotlin / Java).
• Experience with mobile attribution, mobile analytics, or marketing technology (MarTech).
• Familiarity with attribution platforms, conversion tracking, or advertising APIs.
• Google Cloud Platform (GCP).
• Google Pub/Sub, BigQuery, and Apache Airflow.
• Shopify tracking integrations.
• Experience with streaming architectures and event-driven systems.
• Previous experience building developer tools or SDKs from scratch.

Working Conditions

• Fully remote, full-time engagement.
• Initial project duration of 3+ months, with potential extension.
• Hourly rate up to $25 USD.
• Preference for candidates based in North or South America.
• Candidates from Eastern Europe, especially Poland and Ukraine, are also welcome, provided they can maintain working-hour overlap until approximately 22:00–23:00 local time.

Why Join?

• Build from scratch: Own the architecture and implementation of a new mobile attribution SDK.
• Real product impact: Work on customer-facing SaaS functionality used in production.
• Technical ownership: Influence architecture, SDK design, and integration strategies.
• Modern engineering challenges: Work with real-time data, advertising APIs, event streaming, and cross-platform SDKs.
• Remote collaboration: Join a distributed engineering team with meaningful technical autonomy.

Interested? Apply with your CV and briefly describe your experience developing JavaScript and/or iOS SDKs, especially any SDKs built from scratch.