Open to opportunities

Armando Jose Saenz Mariño

@armandojosesaenzmari

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Senior Full Stack Engineer specializing in scalable web platforms, cloud-native architectures, and microservices.

Colombia

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What I'm looking for

I seek senior engineering roles where I can lead frontend and cloud-native efforts, reduce technical debt, and deliver production-grade integrations in collaborative, product-driven teams.

I am a Senior Full Stack Engineer with 10+ years designing, building, and maintaining scalable web platforms across outsourcing, startup, and enterprise environments.

I have strong expertise in JavaScript/TypeScript ecosystems, cloud-native architectures, microservices, and reducing technical debt while leading frontend standards and integrations.

I regularly deliver production-grade features and integrations—examples include RAG enterprise chatbots, DocuSign e-signature workflows, and multiple microservices and CI/CD deployments across AWS, Azure, and GCP.

I collaborate closely with product, design, and DevOps teams, author architectural proposals, lead standardization efforts, and prioritize maintainability and test quality in distributed, high-growth teams.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Limestone (OneRail Platform)

May 2024 - Present (1 year 9 months)

Resolved high-impact technical debt bugs to improve platform stability, implemented a third-party integration with Knack, and authored an adopted architectural refactor proposal to prevent future debt.

React TypeScript MySQL Docker Azure GitHub Actions TailwindCSS Jest OpenAPI

Senior Full Stack Engineer

iAmStudio

Aug 2023 - Oct 2024 (1 year 2 months)

Developed a BYOD enrollment platform and delivered a RAG enterprise chatbot, while executing ~90% of deployments for legacy Python and JavaScript applications using multi-tenant CI/CD pipelines.

React TypeScript Python PostgreSQL MongoDB Docker AWS Terraform CircleCi Azure AI Search

Full Stack Engineer / Team Lead

Rokk3r (Freelance)

May 2023 - Aug 2023 (3 months)

Led delivery of the Emerge Insurance project, restored and dockerized 100% of platform services, and delivered ~80% of planned features under tight timelines including DocuSign e-signature workflows.

AngularJS PostgreSQL Docker Microservices Docusign CI CD Team Leadership

Full Stack Engineer

Xogito Inc

Feb 2022 - May 2023 (1 year 3 months)

Developed backend endpoints for Gearlaunch v2 and delivered three production microservices for Gearlaunch v3, regularly demoing features and implementing Figma designs.

NestJS React Docker Objection.Js Microservices API Design CI CD

Full Stack Engineer

Rokk3r

Nov 2021 - Jan 2022 (2 months)

Developed reusable frontend components including infinite scroll and real-time validation, and fixed ~70% of critical checkout flow issues to improve conversion reliability.

React Redux Frontend Development Validation SMS Verification APIs Performance Optimization

Frontend Engineer

Growth Acceleration Partners

Mar 2021 - Nov 2021 (8 months)

Refactored micro-transaction verification flows for ZenBusiness, implemented dashboards and UI features from Figma designs, and presented sprint demos across distributed teams.

GraphQL React Redux Frontend Engineering Dashboard Development

Full Stack Engineer

Rokk3r

Mar 2020 - Mar 2021 (1 year)

Extended ~80% of requested features for the Cytrust multi-tenant platform, designed a survey campaign system adopted across tenants, and built complex admin dashboards presented to stakeholders each sprint.

AngularJS Docker Dashboard Development

Frontend Developer

iAmStudio

Apr 2017 - Jan 2020 (2 years 9 months)

Delivered multiple MVPs and production dashboards for US and European clients and improved dashboard performance by ~40% for an Emerson Corrosion application.

Angular React Google Maps Plotly Performance Optimization

Full Stack Developer

Xnova

Apr 2016 - Nov 2017 (1 year 7 months)

Implemented ~80% of frontend and backend solutions for flagship projects, built microservices for warehouse data synchronization, and managed DevOps and cloud infrastructure for client platforms.

Angular Ionic MySQL Docker Google Cloud Microservices DevOps

Java Developer

Kubesoft

Apr 2015 - Dec 2015 (8 months)

Introduced Git-based change control reducing deployment times by ~90% and fixed ~80% of legacy bugs to improve deployment workflows.

Java Hibernate JBoss Git Release Management

Software Analyst

Synapsis Tivit

Aug 2013 - Nov 2013 (3 months)

Contributed to the 'Facturación in Situ' initiative for Codensa and earned ITIL Foundations certification while delivering software analysis and support.

C++Windows Mobile Oracle PL SQL ITIL