Sergio Ramirez

Senior Software Engineer

Surrey, British Columbia, Canada3 yrs 2 mos experience
Highly StableAI Enabled

Key Highlights

  • Led development of SafeConnect platform for real-time communication.
  • Built ApliBot, an AI-assisted job search platform.
  • Expert in backend systems with a focus on reliability and performance.
Stackforce AI infers this person is a Backend-heavy Fullstack Engineer with expertise in IoT and mobile applications.

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Skills

Core Skills

Python (programming Language)MicroservicesAndroid DevelopmentKotlinFlutterWeb Application DevelopmentBackend Development

Other Skills

DockerCloud ArchitectureInternet of Things (IoT)AndroidFlaskREST APIsAOSPFastAPICI/CDperformance optimizationpayment getaway integrationui ux designAPI integrationJavaAndroid Design

About

Senior Software Engineer with experience building backend systems, distributed platforms, and end-to-end products across mobile, cloud, and real-time communication. I design and deliver production systems that connect mobile clients, APIs, and cloud services into reliable, observable, and scalable platforms. My background across Android, iOS, and backend engineering allows me to work across the full stack of product delivery, from client applications to server architecture and operational ownership. My core backend expertise includes Python, FastAPI, distributed services, WebSockets, real-time communication, and automation workflows, with a strong focus on reliability, performance, and production readiness. Recently, I led and built SafeConnect, a safety communication platform that combines native mobile development with a FastAPI backend, secure authentication, real-time messaging, contact coordination, and cloud-based observability. The platform was designed to support dependable communication flows where responsiveness, stability, and system behavior under real-world conditions matter. I also built ApliBot, an AI-assisted job search platform designed to help users navigate the application process more effectively. The system combines job discovery, matching logic, AI-powered ranking, tailored resume and cover letter generation, email delivery, and workflow automation into a single end-to-end product. This project reflects my ability to take an idea from concept to working platform, integrating frontend, backend, automation, and user experience into one cohesive system. I care deeply about systems that work in the real world: monitoring, logging, graceful failure, scalability, and full ownership from implementation to production operation.

Experience

3 yrs 2 mos
Total Experience
3 yrs 2 mos
Average Tenure
--
Current Experience

Logicmark

Senior Software Engineer (via Meridian Group S.A.S)

May 2024Present · 2 yrs · Remote · Remote

  • Designed and developed Python microservices powering AI and IoT systems, improving reliability and scalability.
  • Developed Kotlin-based Android modules and contributed to Swift/Flutter mobile integrations for IoT communication workflows.
  • Built event-driven pipelines enabling real-time communication with connected devices.
  • Improved backend performance and reduced latency through optimized architecture and caching strategies.
  • Collaborated with firmware, AI, and mobile teams to deliver cross-functional solutions for production environments.
DockerAndroid DevelopmentCloud ArchitectureInternet of Things (IoT)AndroidFlask+7

Thinkon inc.

Senior Software Engineer

Jun 2023Dec 2023 · 6 mos · Vancouver, BC · Remote

  • Modernized backend systems using Kotlin and Python, improving performance and stability for cloud services.
  • Supported mobile integrations for Android/iOS authentication flows and improved Kotlin module performance for secure access.
  • Implemented secure authentication (JWT) and optimized REST APIs to support high-traffic scalability.
  • Partnered with product/design teams to deliver technical improvements aligned with business goals.

Lululemon

Software Engineer

Apr 2022Apr 2023 · 1 yr · Vancouver, BC

  • Developed Kotlin features and improved CI/CD pipelines for high-traffic global retail applications.
  • Enhanced mobile features for Android (Kotlin) and contributed to iOS workflows, improving app performance and stability across both platforms.
  • Implemented analytics and monitoring tools, improving performance visibility across mobile platforms.
  • Worked closely with cross-functional teams to enhance product quality and app stability.
Android Developmentperformance optimizationpayment getaway integrationui ux designAPI integrationKotlin+2

Agents only technologies

Software Engineer

Sep 2021Feb 2022 · 5 mos · Vancouver, BC

  • Developed Flutter-based logistics and e-commerce apps supporting real-time delivery workflows.
  • Built mobile features in Flutter and supported Android/iOS components for logistics and e-commerce applications.
  • Built reusable UI components and integrated Firebase/WebSocket APIs for real-time updates.
  • Improved app performance and reliability for multi-platform environments.
Android DevelopmentiOS DevelopmentFirebaseTypeScriptWeb Application DevelopmentAndroid Design+2

Hsbc

Android Developer

Jan 2021Sep 2021 · 8 mos · Vancouver, BC

  • Developed secure Android apps for mobile banking and transaction processing.
  • Implemented authentication and backend API integrations following financial-grade best practices.
  • Enhanced UI/UX and app performance for thousands of end users.
JenkinsAndroid DevelopmentProblem SolvingUnit TestingKotlinAndroid Design

Picniic

Senior Software Engineer

Sep 2017Nov 2020 · 3 yrs 2 mos · Vancouver, Canada Area

  • Enhanced scheduling, task, and location-sharing features for family productivity apps.
  • Migrated legacy Java codebase to Kotlin and improved API integrations.
architecture designBackend developmentMVC to MVVM Conversionandroid and iOS developmentAWSS3+6

Education

Universidad Católica de Colombia

Bachelor's degree — Computer Science

Jan 2006Jan 2011

IBM ACM ICPC AND TOPCODER

Participant — Computer Programming

Jan 2009Jan 2011

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