Backend Developer

Job Title: Backend Developer

Location: Lisbon

Contract Type: Full-time

About the Role

We are looking for an experience Backend Developer to join our Cognitive Sensing team at

Hyperion and contribute to the development of scalable, reliable, and maintainable web

applications used in real production environments.

This role focuses on designing, building, and maintaining scalable and efficient server-side

components and data pipelines that power modern applications and services. Alongside

core backend work, you will play a central role in building AI-powered features directly into

the product — from integrating models and designing intelligent workflows to ensuring

these capabilities are performant, reliable, and maintainable at scale. You will work closely

with product, UX, and other engineers to design and deliver features that balance

performance, usability, and long-term maintainability.

What You’ll Do:

• Design and develop scalable, secure, and reusable back-end services and APIs.

• Implement event-driven systems leveraging Azure Event Hub, Service Bus, or open

source equivalents like Kafka and RabbitMQ.

• Design and optimize data models and database interactions.

• Ensure application quality through testing, code reviews, and best engineering

practices.

• Integrate AI/ML models into production systems, working closely with data

scientists and AI engineers.

• Collaborate with cross-functional teams to translate business requirements into

technical solutions.

• Participate in architecture discussions, technical decision-making, and

continuous improvement.

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• Support deployment, monitoring, and troubleshooting in production environments.

Tech Stack

Primary

• Backend: .NET (C#), Python(is a plus)

• APIs: RESTful services, microservices

• Databases: SQL Server, PostgreSQL, MongoDB

• Containers: Docker

Infrastructure & Practices:

• Cloud: Azure (preferred)

• DevOps: CI/CD pipelines, Agile methodology

• Version control: Git

• Messaging & events: Event-driven architecture (Kafka, RabbitMQ)

What We’re Looking For

• Strong experience building production-grade high-volume data streaming

solutions.

• Solid understanding of software engineering fundamentals (clean code, OOP,

SOLID principles).

• Experience designing and consuming APIs.

• Comfortable working with relational, NoSQL databases is a plus.

• Experience working in Agile, collaborative engineering teams.

• Strong problem-solving skills.

Nice to Have / Optional Skills

AI / Full-Stack Skills (OPTIONAL)

• Experience or strong interest in AI-enabled application development.

• Familiarity with Retrieval-Augmented Generation (RAG) architectures, including

vector databases and embedding-based search.

• Exposure to machine learning concepts, model inference, and evaluation.

• Hands-on experience integrating ML or LLM-based services into backend systems.

• Understanding of AI-related constraints such as latency, cost, data quality, and

security.

• Experience collaborating with data scientists, ML engineers or data engineers in

production environments.