diego vallejo
diego vallejo

Senior Software Engineer

Actively looking · Member since 22 Oct 2026
Location
Medellín, Colombia
Desired salary
50–150 USD/hourly
Work preference
Remote Only / Full Time, Part Time, Contract
Experience level
Senior

About

Professional summary

I am a Senior Software Engineer with more than 10 years of experience building scalable full-stack platforms across FinTech, Healthcare, PropTech, eCommerce, and SaaS.

I specialize in modern frontend and backend development using React, Next.js, TypeScript, Java, Spring Boot, Python, FastAPI, and microservices. I design reliable APIs, event-driven systems, data models, and cloud-native solutions.

I have delivered secure onboarding, payments, workflow, reporting, document-management, notification, and dashboard products. My work has improved feature delivery speed, reconciliation efficiency, data synchronization reliability, and operational accuracy.

I am experienced with AWS, Azure, Docker, Kubernetes, Terraform, CI/CD automation, observability, and distributed messaging technologies such as Kafka and RabbitMQ. I focus on reducing deployment time, production incidents, and manual operations.

I also integrate AI and machine-learning capabilities using OpenAI, Anthropic, LangChain, LlamaIndex, RAG, NLP, and scikit-learn. I enjoy collaborating with cross-functional teams, mentoring engineers, and delivering measurable business outcomes.

Notice period: immediately

Skills

58 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Software Engineer Far Out Solutions

Engineered scalable healthcare and FinTech platforms using React, Next.js, TypeScript, Java, Spring Boot, Python, FastAPI, PostgreSQL, Redis, and microservices. Increased feature delivery speed by 35% while delivering secure onboarding, workflow, document, notification, and dashboard capabilities.

Designed schemas, APIs, and event-driven services with Kafka and RabbitMQ, improving throughput by 38%. Automated CI/CD and infrastructure using Docker, Kubernetes, GitHub Actions, Azure DevOps, Terraform, AWS, and Azure, reducing deployment time from two hours to under 25 minutes. Integrated OpenAI, Anthropic, LangChain, LlamaIndex, RAG, NLP, and ML automation; strengthened observability and security; and mentored engineers.

Senior Full Stack Engineer Simetrik

Developed FinTech services with Java, Spring Boot, Python, FastAPI, React, TypeScript, PostgreSQL, Redis, and microservices, improving reconciliation efficiency by 37%. Delivered secure onboarding, payment, reporting, and audit workflows using Kafka, RabbitMQ, Docker, Kubernetes, and AWS.

Integrated core banking, payment, vendor, and internal systems through REST and event-driven APIs, increasing data synchronization reliability by 41%. Created dashboards and improved CI/CD and observability, reducing investigation time and deployment defects. Added AI capabilities for document analysis, fraud detection, anomaly detection, credit risk scoring, and AI assistants using OpenAI, LangChain, Python, and scikit-learn.

Full Stack Engineer LaHaus

Developed PropTech features using JavaScript, TypeScript, React, Vue.js, Node.js, Python, Flask, SQL, NoSQL, Redis, REST APIs, and AWS. Delivered onboarding, property search, partner integrations, messaging, and notifications, reducing lead response time by 36%.

Built backend services, APIs, data pipelines, and administrative dashboards, improving data accuracy and reducing UI support issues. Launched recommendation, intelligent search, and lead-prioritization workflows using Python, scikit-learn, NLP, and behavioral data, while collaborating with product, design, sales, and engineering teams.

Web Developer Leal

Developed loyalty and customer-engagement SaaS solutions using JavaScript, HTML, CSS, Java, SQL, MySQL, REST services, and Git. Built onboarding, rewards, campaign, partner-integration, loyalty-transaction, profile, and reward-management modules.

Created web and administrative tools, reporting, retention analytics, and campaign workflows using JavaScript, AJAX, SQL, and Python. Built segmentation and recommendation workflows with SQL, Python, rule-based classification, and purchase data, collaborating with product, marketing, operations, and engineering teams.

Education

Learning history

Universidad Industrial de Santander

Bachelor's Degree, Computer Science

Completed coursework in software engineering, algorithms, databases, and system design. Applied computer science fundamentals to practical application development and system design projects.

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