About the Company

They build attribution infrastructure for mobile apps — helping companies understand which ad campaigns actually drive paying users. Their platform connects ad clicks to installs to in-app behavior, giving mobile teams real data instead of guesswork. They're integrated with Meta, Google, TikTok, and the major ad networks. Product is live, revenue is growing, and clients depend on it to make million-dollar decisions.

About the Role

As a Senior Back-End Engineer, you'll own the backend setup and stability. You'll work directly with the CEO and the engineering team to drive the product roadmap and make sure the platform doesn't break — because when it does, it costs clients real money.

This isn't a ticket-execution role. You'll design and build systems that are critical, fast, and reliable.

Responsibilities

• Design, build, and maintain scalable and reliable backend services and APIs

• Develop and maintain Python-based applications with high code quality and test coverage

• Design and implement system architectures on GCP, aligned with performance and scalability requirements

• Collaborate closely with frontend and data teams to design efficient, well-integrated systems

• Own API design and evolution — versioning, documentation, consistency, and usability

• Ensure system reliability and performance: monitoring, alerting, optimization, incident response

• Implement and maintain CI/CD pipelines to support fast and safe deployments

• Manage infrastructure using IaC tools

• Optimize cloud resource usage and costs on GCP

• Ensure security best practices are applied: access control, secrets management, secure communication

• Participate in code reviews and contribute to engineering best practices

• Work closely with product and business stakeholders to translate requirements into technical solutions

You might be a good fit if…

Education & Experience

No specific degree required — you need to prove you can do the work. Proven track record in software development with 4+ years of experience in backend or data engineering roles in high-intensity environments.

Technical Skills

• Strong proficiency in Python, with experience building and maintaining production-grade applications

• Experience designing and developing RESTful APIs (FastAPI, Flask, or Django)

• Hands-on experience with Google Cloud Platform in production environments

• Experience with Infrastructure as Code tools in complex systems

• Solid understanding of cloud architecture and distributed systems, especially in data-intensive environments

• Experience working across backend, data, and frontend boundaries, with an understanding of system interactions

• Strong focus on performance, scalability, and reliability

• Experience with observability tools

• Experience with CI/CD pipelines and automated deployment workflows

• Familiarity with containerization and orchestration (Docker, Kubernetes)

• Understanding of database systems (SQL and/or NoSQL) and data modeling

• Knowledge of messaging/streaming systems (Pub/Sub, Kafka)

• Security best practices awareness (IAM, secrets management, secure APIs) — prior security-focused experience is a plus

Soft Skills

• English fluency — it's the working language

• Strong communication skills to collaborate effectively with a small team

• Proactive mindset with a focus on delivering high-quality, scalable solutions

• Attention to detail and commitment to platform stability

You are not a good fit if…

Attitude

• You believe you already know everything and resist feedback

• You're satisfied with your current skills and don't want to keep improving

• You prefer clever tricks over clarity and maintainability in your code

Lack of Rigor

• You don't review your own pull requests before asking for review

• You start coding without fully understanding the requirements

• You consider a task complete as soon as the code "works," without caring about robustness or edge cases

Why join

• Learn a lot by working with the top 1% of tech talent

• Opportunity to shape the technical foundation and future of a growing startup

• Work in a dynamic and collaborative environment with modern tools and technologies

• Drive meaningful impact by owning the platform's key features and shaping the user experience