tellezlabs@gmail.com linkedin.com/in/luistellez Málaga, Spain · Available globally
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Professional Summary

Senior Software Engineer with 15+ years of experience leading architecture and delivery of high-scale distributed systems in cloud-native environments, including mission-critical network monitoring infrastructure at AWS and fleet management platforms at Verizon Connect. Deep expertise in Python, C#/.NET, and AWS serverless, with proven ownership of system design, performance optimization, microservice migrations, and CI/CD pipelines. Track record of cross-team technical leadership, mentoring engineers, and raising the hiring bar through technical interviews. Certified Scrum Master.

Professional Experience

Senior Software Engineer

Oct 2023 – Oct 2025

Verizon Connect · Contract · Dublin, Ireland (Remote)

  • ▸Redesigned the Automated Emissions Compliance Framework, refactoring DynamoDB schemas into a generic, extensible data model supporting 2 compliance types and laying the architectural foundation for future regulations without code changes
  • ▸Led sprint planning, task prioritization, and cross-team coordination within the Admin group, owning technical direction for user management, drivers, permissions, vehicles, and internal tooling services
  • ▸Planned and executed migration of multiple microservices from .NET Framework 4.5 to .NET 6/8, eliminating legacy security vulnerabilities and improving startup times and memory efficiency
  • ▸Drove security remediation across the team's service portfolio, upgrading third-party libraries and improving BlackDuck and 42Crunch compliance scores to meet organisational targets
  • ▸Built an AI/ML-powered chat prototype using Amazon Bedrock integrated with internal documentation and live APIs, enabling support teams to query customer data and take direct actions — reducing manual lookup steps from minutes to seconds
  • ▸Enhanced Octopus Deploy CI/CD pipeline steps for automated DynamoDB table provisioning with GSI and LSI support, standardising infrastructure deployment across the team

Co-Founder & CIO

May 2022 – Jul 2023

Dappify (now WebStudio) · Dublin, Ireland

  • ▸Co-founded no-code Web3 platform enabling MVP launches in minutes via community-maintained smart templates
  • ▸Led design and development of Solidity smart contracts for NFT marketplaces with automated revenue-sharing
  • ▸Managed customer acquisition and blockchain technology education

Senior Software Engineer

Nov 2021 – May 2022

DraftKings Inc. · Dublin, Ireland (Remote)

  • ▸Led design of an online poker platform using C#, .NET Core, and Microsoft Orleans, building a state machine managing the full table lifecycle (blinds, antes, rake structures) and handling edge cases that caused issues on competitor platforms
  • ▸Implemented geolocation-based security validations ensuring real-time compliance with jurisdictional gaming regulations

Senior Software Engineer

Jan 2017 – Nov 2021

Amazon Web Services · Dublin, Ireland

  • ▸Owned design and delivery of a real-time network monitoring system (Python, C++) that detected packet loss, identified system failures, and triangulated the most probable faulty device — significantly reducing mean time to resolution across large-scale infrastructure
  • ▸Boosted alarm coordinator throughput by 3× by designing a competitive job scheduler with built-in fallback, allowing hosts to claim work in parallel while preserving reliability if the scheduler was unreachable
  • ▸Designed and built a cloud-native HR microservice (Lambda, DynamoDB, Kinesis, API Gateway, CloudFormation) managing employee holiday data across multiple countries, replacing a manual spreadsheet process and becoming the single source of truth for HR teams
  • ▸Established CloudWatch dashboards and alerting for production monitoring, enabling proactive incident detection and rapid troubleshooting across network monitoring services
  • ▸Conducted technical interviews spanning coding and system design, contributing to Amazon's hiring bar; served as onboarding buddy creating structured ramp-up plans that accelerated new engineers' productivity

Senior Back-End Developer

Jan 2016 – Dec 2016

Fonetic · Madrid, Spain

  • ▸Designed a scalable API architecture (Web API 2, Dapper, Ninject) and optimised SQL queries; packaged the data access layer for cross-service consumption, accelerating feature development by other teams
  • ▸Configured AI-driven communication monitoring software for financial institutions, designing custom alert rules to detect risk patterns and regulatory compliance breaches in voice and digital communications
  • ▸Collaborated with compliance and risk teams to fine-tune detection parameters, substantially reducing false positives and improving monitoring accuracy

Freelance Developer

Nov 2014 – May 2016

Self-Employed · Remote

  • ▸Developed backends for mobile apps using C# Web API 2; built a hostel booking web app and integrated Cloudinary API for image management

Senior Software Developer

Dec 2012 – Oct 2014

UruIT · Montevideo, Uruguay

  • ▸Movistar: Built a responsive platform (Foundation, Angular, MVC, Web API) for plan advertising and mobile top-ups
  • ▸Insala: Optimised database design, reducing user search time by 35%; helped transition the team from waterfall to Scrum
  • ▸Developed Kinect-based advertising games (C#, WPF); spoke at the 8th .NET local meetup on game development with Kinect

Senior Software Developer

Dec 2010 – Aug 2012

Entrepidus · Caracas, Venezuela / Miami, USA

  • ▸Toyota: Led a team of 4 to build a scalable logistics management platform for Caribbean distributors
  • ▸RIM BlackBerry: Developed a LATAM Marketing Materials Centre managing orders, sales, inventory, and IMEI tracking; led a team of 3

Technical Skills

Core Languages

Python C# .NET 6–8 C++ JavaScript Java Solidity

AWS Serverless

Lambda DynamoDB API Gateway SQS SNS Kinesis CDK Bedrock

Databases

DynamoDB PostgreSQL MSSQL Oracle MySQL

Observability & CI/CD

CloudWatch Grafana Octopus Deploy CodePipeline BlackDuck 42Crunch

Frameworks & Tools

ASP.NET Web API MVC MS Orleans Angular WPF

Practices

Agile/Scrum SOLID Design Patterns Microservices Distributed Systems

Education & Certifications

Master in Security IT & Ethical Hacking

EC-Council / CICE · Madrid, Spain

2016

Computer Engineer

Universidad Católica Andrés Bello · Caracas, Venezuela

2011

Certified Scrum Master (CSM)

Buenos Aires, Argentina

2014
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ACM ICPC Competitor

2006–2009 — Won university programming marathon 4 consecutive years; represented Venezuela in national and international competitions