Freelancer profile translated to English.
Back to original languageAbout Alex
Do you need a senior technical profile who can onboard quickly, work autonomously, and deliver without constant supervision? I can help.
I have over 9 years of experience developing software for high-demand projects: cloud-native architectures, complex integrations, legacy system migration, and end-to-end full-stack development. I have worked in FinTech, data platforms, and critical SLA environments.
I can join to design or review your backend architecture (.NET, Azure, AWS), develop new full-stack features (React + .NET), migrate legacy systems to the cloud, set up data pipelines, or strengthen your team during key moments.
I work 100% remotely, adapt to your pace, and deliver autonomously from day one.
Spanish
Native or bilingual
Catalan
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- FreelancePRINCIPAL SOFTWARE ENGINEER (FRACTIONAL / B2B)BANKING AND INSURANCEAugust 2023 - Today (2 years and 10 months)Barcelona, SpainActing as Lead Engineer for end-to-end SaaS products, focusing on scalability and reliability.• • Infrastructure Architecture: Designed and deployed multi-cloud environments (Azure & AWS) using Infrastructure as Code (IaC), ensuring isolated Dev/Staging/Prod environments.• • Reliability & Performance: Achieved an SLA of >99.95% and maintained an MTTR under 30 minutes by implementing comprehensive observability stacks (Azure Insights + AWS CloudWatch).• • Delivery Automation: Engineered 30+ CI/CD pipelines (GitHub Actions/Azure DevOps/Gitlab) implementing Blue/Green and Canary deployment strategies to ensure zero-downtime releases.• • Security First: Automating security scanning (CodeQL, Dependabot) and centralized secret management, achieving full OWASP compliance for financial-grade applications.• • High-Volume Backend: Architected .NET 8+ microservices handling 15k+ messages/min via event-driven queues (Service Bus/SQS).
- LativeSENIOR FULL-STACK ENGINEERSOFTWARE PUBLISHINGOctober 2025 - Today (8 months)IrelandDriving full-stack development for an AI-driven revenue planning SaaS.• • Event-Driven Architecture: Building scalable microservices using .NET 8+ and Apache Kafka to handle real time data ingestion.• • Data & Analytics Engineering: Implementing high-volume ETL pipelines (Salesforce/HubSpot to Snowflake) using Airbyte for centralized analytics.• • AI & Tooling: Developed internal MCP (Model Context Protocol) servers to enhance frontend teams' context awareness.• • Frontend & DX: Standardized development environments via Docker and led feature delivery in Next.js 16.
- FXStreetSENIOR SOFTWARE ENGINEER & CLOUD LEADPRESS AND MEDIAJuly 2020 - June 2025 (4 years and 10 months)Barcelona, SpainLed the modernization of a high-traffic financial news platform, shifting from legacy monoliths to a cloud-native architecture on Azure.• • Cloud Migration & Orchestration: Spearheaded the migration of core services to Azure Kubernetes Service (AKS), managing deployments via Azure DevOps pipelines to increase scalability and deployment frequency.• • Architecture & FinOps: Designed a multi-region architecture that solved critical latency issues for global users while optimizing cloud resource allocation to reduce monthly billing costs.• • Performance Engineering: Reduced service memory load and improved response times by implementing aggressive distributed caching strategies and refactoring legacy .NET Core bottlenecks.• • Observability & Quality: Established New Relic monitoring standards and led on-call rotations to ensure platform stability, and redefined testing strategies to automate QA processes.• • Mobile Modernization: Directed the strategic migration of the corporate mobile app from Xamarin to React Native, standardizing the frontend tech stack.
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Education
- DEGREE IN COMPUTER ENGINEERINGUniversitat Oberta de Catalunya2022DEGREE IN COMPUTER ENGINEERING
- MULTIPLATFORM APPLICATIONS DEVELOPMENTHIGH NATIONAL DIPLOMA Centre d'Estudis Politècnics2017MULTIPLATFORM APPLICATIONS DEVELOPMENT