Back End Developer (AI Infrastructure)

Alignerr Corp.; Medellín; A distancia; COP 133.774.000 - 267.547.000; Jornada completa

Descripción de la vacante

Alignerr is seeking a Back End Developer to design, build, and optimize the server-side systems and APIs that power cutting-edge AI products. The role is a fully remote hourly contract requiring 10–40 hours per week, with responsibilities spanning data pipelines, model-serving infrastructure, and scalable microservices.

You will work asynchronously with distributed teams, implement robust backend services, and ensure high performance under real-world traffic.

Formación

• Proficient in one or more back end languages
• Experience with RESTful API design and microservices
• Knowledge of relational and NoSQL databases
• Familiar with cloud platforms such as AWS, GCP, or Azure
• Experience with CI/CD pipelines and containerization (Docker, Kubernetes)
• Strong problem-solving and async collaboration skills

Responsabilidades

• Design, develop, and maintain back end services, APIs, and data pipelines
• Build scalable server-side architecture for AI workloads
• Write clean, testable code following engineering best practices
• Integrate with databases, message queues, cloud services, and third-party APIs
• Optimize system performance, reliability, and scalability as usage grows
• Collaborate asynchronously with distributed teams of engineers and researchers
• Tackle production issues, perform code reviews, and contribute to architecture decisions
• Work independently on task- and project-based assignments on your own schedule

Conocimientos

Python

Go

Java

Node.js

Rust

RESTful API design

Microservices architecture

Distributed systems

CI/CD pipelines

Git

Herramientas

Docker

Kubernetes

AWS

GCP

Azure

PostgreSQL

MongoDB

Redis

Descripción del empleo

About The Role

What if the code you write could directly power the AI systems shaping how millions of people interact with technology? We're looking for Back End Developers in Medellín to design, build, and optimize the server-side systems and APIs that drive cutting-edge AI products — from data pipelines and model-serving infrastructure to scalable microservices that handle real-world traffic at scale.

This is a fully remote, flexible contract role. Medellín has become one of Latin America's leading tech hubs, and we're looking for talented engineers who want to take their back end skills to the global AI stage.

• Organization: Alignerr


• Type: Hourly Contract


• Location: Remote


• Commitment: 10–40 hours/week

What You’ll Do

• Design, develop, and maintain robust back end services, APIs, and data pipelines


• Build scalable, high-performance server-side architecture to support AI training and inference workloads


• Write clean, well-documented, and testable code following engineering best practices


• Integrate with databases, message queues, cloud services, and third-party APIs


• Optimize system performance, reliability, and scalability as usage grows


• Collaborate asynchronously with distributed teams of engineers, researchers, and product leads


• Troubleshoot production issues, conduct code reviews, and contribute to architectural decisions


• Work independently on task-based and project-based assignments on your own schedule

Who You Are

• Proficient in one or more back end languages — Python, Go, Java, Node.js, Rust, or similar


• Solid understanding of RESTful API design, microservices architecture, and distributed systems


• Experienced with relational and/or NoSQL databases (PostgreSQL, MongoDB, Redis, etc.)


• Comfortable working with cloud platforms such as AWS, GCP, or Azure


• Familiar with version control (Git), CI/CD pipelines, and containerization (Docker, Kubernetes)


• Strong problem-solving skills and the ability to debug complex systems independently


• Self-motivated, reliable, and effective when working asynchronously without close supervision


• Clear communicator who can document decisions and collaborate across time zones

Nice to Have

• Experience building infrastructure for machine learning or AI systems


• Familiarity with data processing frameworks (Apache Kafka, Spark, Airflow, or similar)


• Background in performance optimization, caching strategies, or high-throughput systems


• Knowledge of authentication, authorization, and security best practices


• Experience with serverless architectures or event-driven design patterns


• Contributions to open-source projects or a strong portfolio of personal/professional work

Why Join Us

• Work on cutting-edge AI infrastructure projects alongside leading research labs


• Fully remote and flexible — set your own hours and work from anywhere


• Freelance autonomy with access to meaningful, technically challenging work


• Build systems at the intersection of software engineering and artificial intelligence


• Collaborate with a global network of talented engineers and researchers


• Potential for ongoing work and contract extension as new projects launch