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Backend Software Engineer

6 ore fa

Milano, Lombardia, Italia Scalapay A tempo pieno

At Scalapay, we're shaping a
culture
with high standards, independent and critical thought,
innovation, ownership, and continuous learning
. We operate in a
fast-moving, tech-driven environment
, and we're looking for people who
thrive in change, think boldly, and take initiative.
If you're ready to
put your potential to the test
in a hiring process designed to spotlight exceptional talent, this is your chance to stand out and grow
with one of Europe's most ambitious fintech teams
.

#MakeItHappen #PlayAsATeam #StayCurious #FocusOnCustomer.
The Mission
We're seeking a skilled Backend Software Engineer to join our Experiences team at Scalapay. You'll be responsible for building and maintaining high-performance, scalable REST APIs that power our user experience. This role focuses on delivering exceptional user experiences through robust backend architecture and optimized API performance.

Key Responsibilities:
API Development & Performance

  • Design, build, and maintain high-quality REST APIs using NestJS framework
  • Optimize API performance through caching strategies, query optimization, and payload compression
  • Implement rate limiting, pagination, and filtering for scalable data handling
  • Ensure APIs meet performance benchmarks with sub-200ms response times

Security & Compliance

  • Implement robust authentication and authorization systems (JWT, OAuth2, multi-factor authentication)
  • Apply security best practices including input validation, SQL injection prevention, and XSS protection
  • Ensure PCI DSS compliance for payment processing and sensitive data handling
  • Implement API security measures including HTTPS/TLS, API key management, and request signing
  • Design secure data encryption at rest and in transit

Backend Architecture

  • Develop scalable, maintainable backend services using NestJS with TypeScript Design and implement microservices architecture patterns
  • Apply dependency injection, modular architecture, and clean code principles
  • Build event-driven systems and real-time features using WebSockets

Database & Cloud Infrastructure

  • Work with MySQL databases, optimizing queries and implementing proper indexing
  • Design efficient database schemas and manage migrations
  • Deploy and manage applications on AWS infrastructure
  • Implement containerization with Docker and CI/CD pipelines
  • Monitor system performance and implement logging/tracing solutions

Required Qualifications:
Technical Skills

  • 5+ years of backend development experience
  • 3+ years hands-on experience with NestJS and TypeScript/JavaScript
  • Strong proficiency in MySQL database design, optimization, and query performance
  • Extensive experience with AWS services (EC2, RDS, Lambda, API Gateway, CloudWatch)
  • Proven expertise in GraphQL API development (both code-first and schema-first approaches)
  • Deep understanding of REST API design principles and best practices

Performance & Security Focus

  • Demonstrated experience in API performance optimization and bottleneck identification
  • Knowledge of caching strategies (Redis, Memcached, HTTP caching)
  • Experience with database query optimization and indexing strategies
  • Strong background in API security including authentication, authorization, and data protection

Development Practices

  • Experience with Git version control and collaborative development workflows
  • Knowledge of testing frameworks (Jest, unit testing, integration testing)
  • Advanced understanding of security best practices (JWT, OAuth2, data encryption, secure coding)
  • Experience with security testing and vulnerability assessments
  • Experience with agile development methodologies

What We're Looking For:

  • Performance-minded developer who naturally thinks about optimization and scalability
  • Security-conscious professional who prioritizes secure coding practices and compliance
  • Strong problem-solver who can identify and resolve API bottlenecks and security vulnerabilities
  • Collaborative team player comfortable with code reviews and knowledge sharing
  • Detail-oriented professional who values code quality, maintainability, and security
  • Continuous learner who stays current with backend development and security best practices

Why you should join Scalapay:

  • International environment with significant challenges to be met every day
  • Lots of opportunities to work with a team of industry tech leaders who are focused on delivering products that offer exceptional user experiences
  • Personalised support to accelerate your professional growth and take ownership of the products you deliver: we want to help you grow
  • Latest technologies and being encouraged to bring your flair to the role.

Recruitment Process:

  • A quick chat with one of our Talent Acquisition team members
  • The first interview with the Hiring Manager to dive deep into your experiences and better understand your motivation
  • A case study to test your hard skills
  • A final chat with Simone, our CEO

Want to learn more? Don't hesitate to explore our Careers website, our LinkedIn and Glassdoor pages.

Pro tip:
send your CV in English

Super Pro tip:
we know that application processes can be scary and frustrating but… we look for talent, not people that tick all our boxes.

We believe in the power of diversity: Scalapay is an Equal Opportunity Employer for any minority, disability, gender identity or sexual orientation.