Back End Developer (AI Infrastructure)

About the role

Alignerr is looking for experienced back-end developers to design, build and optimise the server-side systems and APIs behind AI products, from data pipelines and model-serving infrastructure to scalable microservices handling real-world traffic. The role is fully remote and flexible, with a commitment of 10 to 40 hours per week, and works with a global team.

Key responsibilities

• Design, develop and maintain back-end services, APIs and data pipelines
• Build scalable, high-performance server-side architecture supporting AI training and inference workloads
• Write clean, documented and testable code following engineering best practices
• Integrate with databases, message queues, cloud services and third-party APIs
• Optimise performance, reliability and scalability as usage grows
• Collaborate asynchronously with engineers, researchers and product leads, troubleshoot production issues, review code and help shape architecture
• Work independently on task-based and project-based assignments on your own schedule

Required profile

• Proficiency in one or more back-end languages such as Python, Go, Java, Node.js or Rust
• Solid understanding of RESTful APIs, microservices and distributed systems
• Experience with relational and/or NoSQL databases (e.g. PostgreSQL, MongoDB, Redis)
• Cloud platforms such as AWS, GCP or Azure
• Git, CI/CD pipelines and containerisation (Docker, Kubernetes)
• Self-motivated, able to work asynchronously and communicate clearly across time zones

Nice to have

• Machine learning or AI infrastructure experience
• Data processing frameworks such as Apache Kafka, Spark or Airflow
• Performance optimisation, caching or high-throughput systems background
• Authentication, authorization and security knowledge; serverless or event-driven patterns
• Open-source contributions or a strong portfolio

What we offer

• Work on AI infrastructure projects alongside leading research labs
• Fully remote and flexible, setting your own hours
• Freelance autonomy with access to technically challenging work
• Potential for ongoing work and contract extension as new projects launch