Julio Oña
@juliooa
Senior backend and fullstack engineer delivering Python APIs, AI integrations, and data-intensive systems.
BoliviaWhat I'm looking for
I’m a Systems Engineer and Senior Python backend/fullstack engineer with 20+ years delivering software, infrastructure, and operational solutions for financial and technology organizations. My work is rooted in reliable execution: strong API design, integrations, and dependable delivery in distributed Agile environments.
My backend focus centers on Python with Django, Django REST Framework, and FastAPI, building REST APIs and data-intensive services. I’ve led modernization efforts including Python 2 to Python 3 migrations, plus Kafka/Redis-based coordination and AWS Lambda processing pipelines.
I also specialize in AI-augmented workflows and production data. Recent projects include AI service integration using AWS Bedrock (Anthropic models), Bria, and HumanLoop, alongside XGBoost and TimescaleDB-powered services, with Dockerized deployments to keep systems consistent across environments.
I enjoy partnering with product teams and collaborating on frontend delivery too—especially React, TypeScript/JavaScript, and Angular—when the work benefits from tight backend-frontend alignment. I’ve also mentored teammates and supported quality in Agile delivery, from business-critical APIs to long-term client platforms.
Experience
Work history, roles, and key accomplishments
Delivered backend platforms, AI integrations, and modernization programs for international clients. Migrated Python 2 to Python 3 services, built FastAPI services with XGBoost and TimescaleDB, and integrated AWS Bedrock (Anthropic models) with Bria and HumanLoop.
Senior Developer
Caffeine Consulting
Jan 2015 - Jan 2019 (4 years)
Delivered backend APIs and frontend components for business-critical workflows in an Agile environment. Built software to improve information sharing across siloed workflows and mentored teammates to support delivery quality.
Freelance Developer
Enlace.com (Upwork.com)
Jan 2012 - Jan 2015 (3 years)
Provided development and long-term support for multiple client accounts, including QA tooling for a software factory. Built AWS integrations and delivered custom software development and operational support, along with QA processing utilities.
Information Security Officer
Bisa Seguros y Reaseguros S.A.
Jan 2008 - Jan 2012 (4 years)
Owned information security policy and supporting technology operations for an insurance enterprise. Established security policies and implemented help desk and monitoring/logging solutions using multiple infrastructure tools.
Senior Developer
Bolivian Pension Department
Jan 2007 - Jan 2008 (1 year)
Built a consolidation system for Renta Dignidad pension payments and implemented the full payment cycle under tight delivery timelines. Automated operational tasks and improved usability for existing workflows.
Partner / Engineer
The Occam’s Razor Solutions S.R.L.
Jan 2005 - Jan 2007 (2 years)
Co-founded a consultancy and delivered end-to-end software implementations based on client needs. Developed expenditure tracking and budget execution applications and co-led technology projects for domestic and international organizations.
Technology Business Rep
Citibank N.A. Bolivia Branch
Jan 2000 - Jan 2005 (5 years)
Owned branch technology operations and led regional migration before branch closure. Supported securities valuation system improvements and national infrastructure operations while migrating local applications and procedures to regional platforms.
Systems Developer
Jasper Consulting L.A.
Jan 1998 - Jan 1999 (1 year)
Maintained and implemented web services and internal business applications, including biometric fingerprint analysis and national registry workflows. Migrated NT server services to Linux to reduce cost and improve remote management.
Programmer & Communications
Hyper Bolivia
Jan 1995 - Jan 1998 (3 years)
Developed business applications and configured communications equipment, including enhancements for debit card and POS systems. Designed and built the SENTINELLA staff control system and supported related communications setup.
Education
Degrees, certifications, and relevant coursework
Universidad Católica Boliviana San Pablo
Systems Engineering Degree, Systems Engineering
Earned a Systems Engineering degree at Universidad Católica Boliviana San Pablo in La Paz, Bolivia.
Quipus-NUR
Cisco CCNA, Networking
Completed Cisco CCNA training/certification through Quipus-NUR in La Paz, Bolivia.
PING
Microsoft Exchange Training, Microsoft Exchange
Completed Microsoft Exchange training in La Paz, Bolivia through PING.
Coursera
Machine Learning (coursework), Machine Learning
Completed Machine Learning coursework on Coursera.
Tech stack
Software and tools used professionally
Availability
Location
BoliviaAuthorized to work in
Job categories
Skills
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