I seek senior backend or full‑stack roles at agile companies, where I can lead technical delivery, work with Java/Spring and cloud architectures, and drive clean, testable solutions.
Open to opportunities
Cesar Tenemaza
@cesartenemaza
Senior Backend Java-focused software developer and IA Enginner learning.
EcuadorWhat I'm looking for
I am a Senior software developer with over 11 years of experience building backend and full‑stack solutions, primarily using Java and Spring Boot, for banking and fintech clients across the USA, Canada, Ecuador, and Spain. I have led small teams, served as a technical lead, and delivered large migration and core‑feature projects using microservices, Kafka, cloud/serverless (AWS), CI/CD and automated testing.
My work emphasizes clean code, SOLID principles, and reliable delivery in agile teams; notable achievements include designing a migration backend for 9 million users, implementing serverless transaction processing with AWS Lambda, and building core banking-related features that improved client processes and productivity.
Experience
Work history, roles, and key accomplishments
Current
Senior Backend Developer
Zagalabs
Nov 2025 - Present (5 months)
I drive backend process improvements by combining core engineering principles with AI (Claude Code/LLMs) to close code gaps, focusing on high-level refactoring and algorithmic efficiency.
I deliver high-quality backend services across diverse stacks, including NestJS and PHP Laravel, maintaining a focus on clean code and system modularization.
Provided senior full‑stack consultancy for a US retail-hardware client, delivering feature updates and add-ons using Java 21 and React within a CI/CD Scrum pipeline.
Developed core fintech features and microservices for banking clients (Santander, BNP), implementing Java 17/Kafka-based services on AWS and ensuring delivery within Scrum.
TB
Senior Java Engineer
The Bridge
Oct 2023 - Apr 2024 (6 months)
Built Java solutions to migrate legacy systems to serverless architecture and implemented AWS Lambda functions to process transactions for a produce-distribution client.
Developed REST APIs and core features for Royal Caribbean, applying SOLID principles and CI/CD with Jenkins to deliver microservices-based solutions.
Led backend development for migration services handling 9M users, served as short-term Tech Lead for a 5‑member team, and delivered platform solutions using Ruby and Java 17 tech stacks.
AL
Software Developer
Advance Latam
Mar 2019 - May 2021 (2 years 2 months)
Implemented services and new functionalities for banking processes (Mutualista Pichincha) to improve insurance contracting, credit workflows, BPM and internal reporting.
SV
Software Developer
Secretaría Técnica Plan Toda Una Vida
Nov 2017 - Jan 2019 (1 year 2 months)
Implemented a referral system connecting citizens to government services, improving access to medical attention in underserved city areas and streamlining inter-agency workflows.
AP
Freelance Software Developer
APLios
Aug 2017 - Oct 2017 (2 months)
Developed in-house credit rating verification solutions for banking clients (Equifax), improving data validation and processing for credit assessments.
YE
IT Support Engineer
YellowPepper
Feb 2016 - Aug 2017 (1 year 6 months)
Improved communication between clients and IT regarding bug fixes and internal web service components, streamlining updates and reducing resolution friction across the IT area.
AL
Software Developer
Advance Latam
Jun 2014 - Dec 2015 (1 year 6 months)
Implemented core banking updates and client-specific requirements for Latin American banks, improving system functionality and client compliance during tenure.
Education
Degrees, certifications, and relevant coursework
Escuela Politécnica Nacional
Bachelor of Science, Computer Engineering
Bachelor of Science in Computer Engineering completed in April 2016, focusing on software engineering principles and systems development.
Tech stack
Software and tools used professionally
Availability
Open to opportunities
Location
EcuadorAuthorized to work in
Salary expectations
60k-120k USD
Social media
Job categories
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