Mid-Level Full Stack Developer (AWS) – 100% On-site - Av. Paulista

Mid-Level Full Stack Developer (AWS) – 100% On-site | São Paulo – Av. Paulista

At Eyna, we turn images into intelligent decisions. With computer vision and multimodal AI, we help industries and critical operations automate inspections, quality control, and process monitoring—from production to sales.

We are growing and looking for a Mid-Level Full Stack Developer with solid AWS experience who wants to build real products, close to the business, in an agile, meritocratic, and highly technical environment.

📍 Location: 100% on-site, Avenida Paulista area – São Paulo/SP

Your Mission

- Develop and evolve modules of our SaaS platform (back-end and front-end), connecting cameras, sensors, and corporate systems;

- Create robust APIs and integrations so clients can consume our computer vision models at scale (edge + cloud);

- Ensure solutions are performant, secure, observable, and easy to maintain, using engineering best practices and AWS;

- Work side-by-side with the Machine Learning/Computer Vision team, translating technical requirements into products running in production;

- Use AI to boost your own productivity, adopting tools that optimize development, testing, troubleshooting, and documentation;

- Share knowledge with the team in a simple and structured way, through tutorials, practical examples, and internal materials (you don't need to be a video expert, but you must have the willingness and team spirit to share what you know, so that you take on more critical missions as newcomers learn from you).

Day-to-Day Responsibilities

- Develop back-end services (REST/GraphQL) with a focus on scalability, code best practices, and automated testing;

- Implement and evolve web interfaces (dashboards, settings, operation screens) focused on clarity and usability.

- Design and maintain AWS architectures, using services such as (examples):

- API Gateway / ALB

- Lambda / ECS / EC2

- S3, managed databases (RDS/Aurora or similar)

- CloudFront, CloudWatch, etc.

- Collaborate in defining and implementing CI/CD pipelines (automated deployment, staging/production environments, versioning).

- Help evolve internal code standards, observability, security, and technical documentation.

- Create small internal tutorials (short texts, screenshots, simple recordings) to document solutions and best practices.

What We Expect From You

- Previous experience as a Mid-Level Full Stack Developer;

- At least 5 years of experience in areas such as engineering, mathematics, physics, or computer science.

- Solid experience in at least:

- A modern back-end language (e.g., Node.js, Python, Go, or similar).

- A modern front-end framework (e.g., React, Vue, Angular, or similar).

- Practical experience with AWS in real projects (deployment, monitoring, troubleshooting production environments);

- Knowledge of databases (SQL and/or NoSQL) and basic modeling;

- Familiarity with Git, versioning best practices, and pull request workflows;

- Product mindset: care not only about code, but also about delivered value, usability, and impact on the end user;

- Clear communication, collaborative attitude, and a genuine desire to learn and teach.

Nice to Have

- Experience with distributed architectures and high-availability systems;

- Experience with Infrastructure as Code (CDK, Terraform, or similar);

- Knowledge of event-driven architectures (queues, pub/sub, etc.);

- Experience with observability (structured logs, metrics, dashboards, alerts);

- Interest or experience in computer vision / AI / AIoT.

Working at Eyna

- A truly agile environment: short cycles, fast feedback, and a focus on getting solutions into production and measuring impact;

- A culture of technical rigor combined with simplicity: lean, robust, and auditable solutions, avoiding unnecessary complexity;

- Explicit appreciation for using AI as a productivity lever and for knowledge management (documenting, teaching, replicating);

- A multidisciplinary team solving complex problems with creativity, method, and a sense of ownership.

How to Apply

If you want to build products that truly run in industry, impact critical operations, and use AWS + AI in practice to solve complex problems, send your resume and, if possible, a portfolio/GitHub with relevant projects.