My Path
Hey there! I'm Sebastian Nielsen, I specialize in software solutions to bring your online world to life. My expertise is based on Backend Techs, APIs, and blockchain solutions, but as you can see, I can also design WEB's.
Education
Senior Technician in Programming UTN
Tech University, 2010 - 2014I began my coding journey with a solid computer science education at Technological National University (UTN) Argentina, laying the foundation for navigating the ever-evolving tech landscape.
Key Skills & Technologies
Backend Development
Expert in designing RESTful APIs and microservices with Node.js frameworks. Skilled in creating middleware, route handling, and efficient request processing. Experience with serverless frameworks and event-driven architectures.
TypeScript & JavaScript (ES6+)
Profound knowledge of modern JavaScript features like async/await, destructuring, modules, and generators. Expertise in TypeScript for type safety, interfaces, generics, and integrating static typing into large codebases for maintainability and reduced bugs.
API Design & Development
Designing scalable, versioned APIs with best practices for resource modeling. Proficient in implementing GraphQL endpoints for flexible client queries and defining comprehensive API documentation adhering to OpenAPI/Swagger standards.
Microservices & Cloud Infrastructure
Architecting and deploying loosely coupled services using Docker containers orchestrated by Kubernetes clusters. Managing cloud resources on AWS (EC2, Lambda, S3, RDS, CloudWatch) and Azure for scalability, robustness, and cost-efficiency.
Databases & Data Storage
Advanced querying and schema design for NoSQL and relational databases. Implementing replication, sharding, and indexing strategies. Using Redis for caching, session management, and pub/sub messaging to boost performance.
Message Queues & Event Streaming
Building decoupled, scalable systems that leverage message brokers for asynchronous communication, event sourcing, and real-time data processing. Ensuring message durability, ordering, and fault tolerance.
Testing & CI/CD
Creating comprehensive test suites including unit, integration, and end-to-end tests. Automating deployment pipelines with continuous integration and delivery practices to ensure reliable releases.
Security
Implementing secure authentication and authorization mechanisms, protecting sensitive data through encryption, and mitigating common vulnerabilities like XSS, CSRF, and injection attacks.
Performance Optimization
Monitoring and profiling applications with tools such as Node.js built-in profiler, Clinic.js, or New Relic. Applying caching strategies, clustering Node.js processes, and load balancing to handle high traffic efficiently.
DevOps & Automation
Automating infrastructure provisioning with Terraform, managing container deployments, and setting up monitoring dashboards with Grafana and Prometheus for proactive system health tracking.
Version Control & Collaboration
Mastering Git workflows including feature branching, pull requests, and code reviews to facilitate team collaboration and maintain high code quality.
Other Skills
Includes expertise in various areas such as design patterns, code quality, and agile methodologies.
Passion
Continuous Learning and Community Engagement
Passion for Continuous Learning - Beyond work, I stay current with the development community, fueling my passion for cutting-edge digital solutions.