Midlevel Back-End Developer

We are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions.

With over 7.400 CI&Ters around the world, we've built partnerships with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality.

We are seeking a highly skilled Backend Developer to join our engineering team for a digital transformation project. You will play a key role in developing and implementing robust, scalable backend services for a modern portal. As a Backend Developer, you will be responsible for building services, APIs, and integrations that support seven critical insurance lines while ensuring high performance, security, and compliance with industry regulations.

Responsibilities:

Develop and maintain scalable backend services using and framework

Design and implement RESTful APIs and GraphQL endpoints for frontend and external integrations

Build services architecture following best practices for distributed systems

Develop secure authentication and authorization systems using OAuth 2.0 and JWT

Create integration APIs for Microsoft Entra ID SSO and external partner systems

Implement business logic for workflows, claims processing, and policy management

Write comprehensive unit tests and integration tests ensuring 90%+ code coverage

Follow security best practices including data encryption, PII masking, and audit logging

Collaborate with frontend developers to design efficient API contracts and data models

Participate in code reviews and maintain high code quality standards

Requirements:

Experience with and JavaScript/TypeScript

Experience with , Fastify, or similar frameworks

Proficient in RESTful API design and development with proper HTTP status codes and error handling

Experience with PostgreSQL including complex queries

Knowledge of authentication protocols (OAuth 2.0, JWT, SAML) and security best practices

Proficient with Git version control and collaborative development workflows

Experience with automated testing frameworks (Jest, Mocha, or similar)

Understanding of microservices architecture and distributed systems concepts

Knowledge of CI/CD pipelines and deployment automation

Strong problem-solving skills and attention to detail

Communication and teamwork skills

Nice to Have:

Familiarity with GraphQL and Apollo Server

Experience with serverless architecture (AWS Lambda, Serverless Framework)

Knowledge of monitoring and observability tools (Prometheus, Grafana, ELK Stack)

Experience with Infrastructure as Code (Terraform, CloudFormation)

Understanding of Kubernetes and container orchestration

Experience with legacy system integration and data migration

Knowledge of Agile methodologies and project management tools

Experience with multi-tenant application architecture

Familiarity with Power Platform (Power Apps, Power Automate) for migration projects

Our benefits:

• Health and dental insurance
• Meal and food allowance
• Childcare assistance
• Extended paternity leave
• Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass;
• Profit Sharing and Results Participation (PLR);
• Life insurance
• Continuous learning platform (CI&T University);
• Discount club
• Free online platform dedicated to physical, mental, and overall well-being
• Pregnancy and responsible parenting course
• Partnerships with online learning platforms
• Language learning platform

And many more

More details about our benefits here:

At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it.

We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.