I architect software systems end-to-end: from service boundaries, APIs, and data flows to cloud infrastructure, delivery pipelines, and day‑2 operations. AWS is the platform I use most, but my core value is software architecture under real constraints: reliability, cost, security, latency, maintainability, and teams that need to ship. Lately that is mostly applied to Generative AI applications.

I’m a Sr Innovation Architect (Office of the CTO) at Caylent. I also write Simple AWS, a weekly newsletter read by 45k+ engineers, architects and team leads who want clear explanations and practical patterns, not copy‑pasted architectures.

Advisory & consulting (where I’m most useful)
- Architecture reviews and “what should we build next?” roadmaps (software + cloud, GenAI)
- High-stakes tradeoffs: build vs buy, serverless vs containers, async vs sync, data modeling and boundaries
- GenAI solution architecture: production patterns, evaluations, model selection, production deployments and best practices, cost/latency tradeoffs, and integration into existing products
- Cloud-native architectures on AWS (serverless, event-driven, containers where it fits, networking and security)
- Delivery practices for code (Python, JavaScript/TypeScript) and Infrastructure as Code (CDK, Terraform, CloudFormation)
- Enablement: workshops, presales support, and technical talks for teams and leadership

Credibility (high level)
- 11+ years building software professionally; 25+ projects across startups, enterprises and SMBs
- AWS Solutions Architect Professional; AWS Community Builder and Builder of the Year award winner; former AWS Authorized Instructor
- International speaker (Argentina, US, Mexico, Colombia, and looking to expand this list)

I’m not actively job-hunting, but I’m open to selective advisory/consulting engagements (reviews, workshops, short-term roadmap work, or fractional architecture and technology support). If you think I can help, DM me.

Start reading here: simpleaws.dev
Sponsorships for Simple AWS: https://www.passionfroot.me/guilleojeda

Guille Ojeda

MuduPay

Software Engineering Team Lead

Summary: MuduPay enables African consumers to easily make any Online and Local Payments, buy Airtime & Data, and Transfer money through their mobile money accounts. With access to free local features and without needing an internet connection, MuduPay provides consumers with the simplest way to make payments via mobiles.

- Integrated Canal Plus APIs to enable payments to their services via MuduPay

- Architected secure, scalable, cost-efficient infrastructure on GCP using auto-scaling VM groups and technologies such as Celery, Redis, Gunicorn, Nginx, and PostgreSQL

- Configured networking, including firewall rules, NAT gateway, CloudSQL proxy, and OpenVPN

- Successfully identified and blocked DOS attacks, reducing costs by 15%

- Identified and resolved an issue with Celery hanging when making external calls using the requests library. Used tools such as strace and lsof to diagnose the problem and added timeouts to prevent the issue from recurring. This increased the reliability of our task queue and improved the overall performance of the system.

- Streamed Nginx and Django logs to GCP logs explorer for improved monitoring and visibility

DevOps Engineer

TradeFiti

DevOps and Backend Consultant

Easy Solar

Summary: Easy Solar is providing pay-as-you-go solar technology, financing options, and solar hardware products for communities and businesses in Sierra Leone. My role currently covers the company's growing DevOps needs and Backend Engineering.

- Reengineered the CI pipeline to cover all components of React applications and set up the CD pipeline for automated deployments resulting in a 40% reduction in deployment timelines

- Automated the APK generation pipeline thus reducing development timelines.

- Utilized Secret Manager to facilitate secure injection of environment variables into Flask applications on Cloud Run

- Participated and contributed to system redesign efforts by providing insights on server scalability considerations and image storage optimization.

- Actively collaborating with product management and software engineers to align with business goals

- Helped reduce cloud costs by 80% by guiding the team to build stateless applications for serverless architecture

- Built System Recommendation feature to enable users to estimate their daily power consumption and recommend a power system to fulfill their daily power needs.

- Built Remittance service to give agents and their supervisors insights on how much is supposed to be remitted.

Technologies Used: Google Cloud Run, Google Cloud Build, Flask, Docker, Docker Compose, Bash, Linux, PostgreSQL, Google Operation Suite, Google Cloud Platform, Google Compute Engine

DevOps and Backend Engineer

Andela

Summary: Andela provides companies with access to the top 1% of global tech talent. My role was as a junior DevOps engineer working on internal projects. I underwent an extensive Bootcamp process in preparation to work with the distributed teams.

- Underwent training in project management and collaboration to facilitate working with a distributed team

- Successfully participated in open-source project contributions

- Actively participated in the onboarding process in the DevOps team and provided mentoring and guidance for new members of the team

- Conducted training sessions for DevOps teams, facilitating their proficiency in Jenkins for efficient project setup.

- Led comprehensive training sessions for software development teams, emphasizing the importance of DevOps principles in software engineering practices.

- Set up scalable Jenkins on GKE with primary-secondary architecture using the Jenkins Helm charts, increasing efficiency by 80%.

- Architected and rolled out a fault-tolerant infrastructure on GCP using Terraform, Docker, and Kubernetes for travel and procurement project with up to 99% uptime.

- Carried out the unblocking of queuing challenges on pipelining days using Jenkins improving shipping timelines.

Technologies Used: GCP, CircleCI, Jenkins, Terraform, Kubernetes, Docker, Stackdriver, Python, Flask, Django, PostgreSQL, Linux, Bash

I'm a skilled DevOps and Backend Engineer with over 6 years of experience in cloud infrastructure, microservices, and team leadership. Currently, I lead engineering efforts at MuduPay, where I’ve driven initiatives like revamping a POS system for an 80% increase in efficiency and decoupling ERP solutions into dedicated services for smoother operations. My background includes architecting secure, scalable infrastructures on GCP, streamlining CI/CD pipelines, and implementing centralized payment systems to improve integration speed by 50%.

I thrive in remote work settings, bringing strong collaboration skills and a proactive approach to projects. With hands-on expertise in Kubernetes, Terraform, Docker, and Google Cloud, I'm passionate about building resilient systems that empower organizations to scale efficiently. I’m excited to explore opportunities to make an impact with innovative, remote-first teams.

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The Battle

Guille Ojeda

Harith Bakhrani

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