Senior Software Engineer

AWS Serverless • Distributed Systems • Fintech & IoT

I build cloud-native backends that scale and stay reliable. My work spans fintech and IoT—accelerating compliance workflows by 40% and reducing debugging time by 30% through observability-first practices and clean architecture.

Node.js TypeScript Python AWS Lambda DynamoDB API Gateway Event-driven Serverless Microservices

Let's talk View experience

Location Venezuela (Open to Remote US/EU)

Focus Backend, Cloud Platforms, Reliability

Exploring Applied AI/LLMs for automation

Experience

Roles focused on backend, cloud platforms, distributed systems, and reliability.

Senior Software Engineer — Namutek

Remote • 2023–Present • Fintech

Node.js • TypeScript • AWS • Serverless

Orchestrated the migration of 2M+ banking users to a unified platform, improving scalability and boosting transaction volume by 35%.
Led backend modernization initiatives, introducing serverless patterns and standardizing deployments via CI/CD pipelines.
Designed and implemented authentication and authorization refactors using AWS Cognito and DynamoDB, enabling dynamic roles and fine-grained permissions.
Built internal administrative modules and microdeposit approval systems, reducing processing time by 40% and improving auditability for compliance.
Implemented observability improvements and structured logging, decreasing debugging time by 30% and strengthening operational reliability.

Senior Software Engineer (Contract) — Powerley via Jobsity

Remote (US) • 2024–2025 • IoT / Energy Tech

AWS IoT • Lambda • DynamoDB • Timestream

Built and maintained serverless backends for real-time IoT telemetry using AWS IoT Core, Lambda, DynamoDB, Timestream, and S3, processing millions of events daily.
Designed OTA orchestration and connectivity monitoring, reducing communication errors by 25%.
Developed analytics pipelines with PostgreSQL and dashboards with QuickSight to support operational visibility.
Improved system reliability through structured logging, CloudWatch, OpenSearch, and Datadog, reducing incident response time.

FullStack & Tech Lead Backend — CAIserT

Hybrid • 2021–2023

Node.js • Vue • GraphQL • Docker • Neo4j

Led distributed teams delivering full-stack solutions with Node.js, Vue, GraphQL, Docker, Apollo, and Neo4j.
Improved delivery speed by 15–20% through better architecture patterns and engineering practices.
Introduced Test-Driven Development practices, reducing post-release defects by 30%.
Designed event-driven patterns that increased scalability and long-term maintainability.

Full-Stack Developer — TechSynergy

Remote • 2020–2021

Node.js • Vue • MongoDB • MySQL

Built scalable web applications using Node.js, Vue.js, MongoDB, and MySQL.
Improved overall system efficiency by 30% through architectural optimizations.
Integrated AWS services and improved application security, reducing delivery timelines by 17%.

University Instructor (Part-time) — Momboy Valley University

Remote • 2023

React • JavaScript • HTML/CSS • Vue • Tailwind

Taught modern web technologies (React, JavaScript, HTML, CSS, Vue, Tailwind) with a strong hands-on approach.
Increased student engagement by 15% and project completion rates by 25%.
Organized hackathons and technical talks, boosting participation by 20%.

Frontend Developer — CreativeWorks

Remote • 2018–2019

WooCommerce • Bootstrap • jQuery • HTML/CSS

Developed and maintained WooCommerce features, improving functionality by 20% and increasing user satisfaction by 15%.
Enhanced UI/UX using Bootstrap, jQuery, HTML, and CSS, increasing engagement metrics by 10%.

Technical Expertise

Core technologies, infrastructure, and engineering practices used across production systems.

Core Technologies

Node.js Express.js TypeScript JavaScript Python Flask React AngularJS GraphQL REST APIs

Frameworks & Tools

Docker Kubernetes Jest Cypress Postman Swagger/OpenAPI DataDog Sentry JMeter Linux Shell Scripting Firebase SonarQube

Cloud & Infrastructure

AWS Lambda Serverless API Gateway SQS RDS DynamoDB S3 CloudFront Route53 Secrets Manager Cognito IAM CloudWatch CloudTrail Microservices

DevOps & Delivery

CI/CD AWS Pipelines GitHub Actions Terraform IaC Feature Flags LaunchDarkly Observability Monitoring Structured Logging

Data Platforms

PostgreSQL DynamoDB MongoDB Timestream Real-time Pipelines Analytics Dashboards

Quality & Reliability

TDD Test Automation Performance Optimization Incident Response Security Practices Runbooks

Highlights

Selected outcomes demonstrating scope, scale, and senior ownership.

Fintech platform migration

Led backend initiatives supporting the migration of 2M+ users into a unified platform, improving scalability and increasing transaction volume by 35%.

AWS Serverless Distributed Systems Reliability

IoT telemetry & OTA orchestration

Built serverless backends for device telemetry and rollout orchestration, improving connectivity reliability and reducing communication errors by 25%.

AWS IoT Timestream Event-driven Observability

Authorization & security

Designed fine-grained authorization using AWS Cognito + DynamoDB, enabling dynamic roles and audit-friendly access control.

Cognito DynamoDB IAM Security

Featured

Selected open-source work and technical writing.

Open-source Chrome Extension

Better Comments for Bitbucket PRs — improves code review clarity by enhancing PR comment formatting and collaboration.

View on Chrome Web Store

Open Source Developer Productivity Code Reviews

Technical Blog (Hashnode)

Deep-dives on backend engineering, AWS serverless, architecture decisions, and career growth.

Read articles

AWS Backend System Design

Community

Knowledge-sharing and technical communication through BSCode.

BSCode

Through BSCode, I publish technical content on backend engineering, AWS serverless, system design, and career growth. This reinforces strong technical communication, knowledge-sharing, and mentorship capabilities.

Instagram TikTok YouTube Blog

Education & Certifications

Formal education and AWS credentialing.

B.S. in Computer Engineering

Momboy Valley University • 2017–2020

Computer Science • Systems • Software Engineering

Foundations in software engineering, systems design, and computer science fundamentals.

AWS Certified Cloud Practitioner

Amazon Web Services

Certification

Validated knowledge of AWS fundamentals, security, pricing, and cloud best practices.

AWS Certified Developer – Associate

Amazon Web Services

Certification

Validated expertise in developing, deploying, and debugging cloud-native applications on AWS.

AWS Certified AI Practitioner

Amazon Web Services

Certification

Validated fundamentals of AI/ML concepts and AWS AI services for practical, business-oriented use cases.

AWS Certified Solutions Architect – Associate In Progress

Amazon Web Services • Expected 2026

Certification

Preparing for certification covering design of distributed systems, cost optimization, and AWS architectural best practices.

Languages

Communication readiness for global teams.

Spanish

Native

English

Professional working proficiency (technical communication, meetings, documentation)

Contact

Best way to reach me for senior backend / platform roles.

📧 Email

blsvsanteliz@gmail.com

💼 LinkedIn

linkedin.com/in/brian-santeliz

💻 GitHub

github.com/briansanteliz