I help businesses transform their ideas into robust, scalable, and high-performance digital solutions. I have over 8 years of hands-on experience building enterprise applications focused on reliability, performance, and long-term maintainability.
Experience and Technical Skills
Backend Development
C#
.NET Framework / .NET
VB.NET
REST API development
Entity Framework
Frontend Development
Angular
React.js
TypeScript
JavaScript
Bootstrap
Database Management
SQL Server
Oracle
MySQL
Query optimization
Stored procedures
Reporting services
DevOps and Tools
Azure DevOps
CI/CD pipelines
SonarQube
Git
Legacy System Modernization
Migration from VB6 and VBA to modern technologies
Code refactoring and performance improvements
System scalability and architecture improvements
Professional Highlights
Developed enterprise applications for retail, logistics, and financial sectors
Built integrations with payment terminals, PDAs, and third-party APIs
Led migration projects for legacy systems while improving code quality using SonarQube
Designed and implemented picking, packing, and inventory management systems
Education
Currently pursuing a Software Engineering degree at Corporación Universitaria Iberoamericana, strengthening my academic background while continuing to work on real-world projects.
How I Can Help
Custom web application development
API development and system integrations
Legacy system modernization
Database optimization and reporting solutions
If you are looking for a developer focused on delivering stable, scalable, and business-oriented solutions, feel free to contact me to discuss your project.
SOAP
C#
JavaScript
XML
SQL
Web Development
Bootstrap
HTML
React
Angular
VB.NET
REST API
PHP
Oracle
Juan A.
Bogota, Colombia
$16/hr
4.9
5 jobs
I build backend systems that work the first time and keep working after I leave.
My last client hired me twice. The first time to build a custom eSign platform from scratch. The second time — three months later — to extend it, because the original architecture was clean enough to grow without rewriting. That's the kind of software I build.
10 years of enterprise backend development. I've built:
→ A loan processing engine for a banking platform — retail and corporate lending workflows, credit decisioning APIs, multi-stage approval pipelines
→ A custom eSign web application — full design and development, then seamless feature expansion for a returning client
→ A serverless inventory management system on AWS (Lambda + DynamoDB + API Gateway + Cognito)
→ Clinical documentation systems handling care gap detection across 31 medical categories
I specialize in the kind of backend work where getting it wrong is expensive: financial services, healthcare, compliance-heavy domains. Systems where you need someone who thinks about edge cases before they become production incidents.
Tech stack: Java 8/11/17 · Spring Boot · Spring Security · Spring Batch · Spring Data JPA · Hibernate · PostgreSQL · MySQL · Oracle · DynamoDB · Apache Kafka · Docker · REST APIs · AWS (Lambda, EC2, ECS, S3, Step Functions, API Gateway) · OAuth 2.0 · JWT · CI/CD (Jenkins, SonarQube) · 90%+ test coverage (JUnit 5, Mockito)
100% Job Success. Every project delivered on scope. Every client rated me 5 stars on communication and quality.
Based in Colombia (EST-aligned). Fluent English and Spanish. Available 30+ hrs/week. I respond within hours, not days.
Looking for a Java backend developer, Spring Boot specialist, or AWS microservices engineer? Let's talk about your project.
Java
Spring Framework
Angular
React
JavaScript
Amazon Web Services
Application
Desktop Application
Spring Boot
Spring Cloud
Spring Data
Spring Integration
Spring MVC
Spring Security
Google Cloud Platform
Juan Diego R.
Bogota, Colombia
$9/hr
5.0
3 jobs
Hello!
I'm Juan Rueda, a Business Intelligence consultant with more than 5 years of experience helping companies improve their brands, optimize operations, and increase their sales through data-driven strategies.
My expertise combines Business Intelligence, AI automation, and strategic consulting, allowing me to transform complex data into clear actions that generate measurable business results.
What can I offer you?
• Strategic Business Consulting: I work with companies to define clear objectives, identify growth opportunities, and design practical strategies aligned with business goals.
• AI Automation & Process Optimization: I implement AI-powered automations that reduce manual work, improve efficiency, and scale marketing and sales processes.
• Branding & Marketing Strategy: I develop customized strategies that reflect the essence of your brand and effectively connect with your target audience.
• Content Creation & Digital Presence: I design engaging and relevant content that strengthens brand positioning and attracts qualified leads.
• Data Analysis & Business Intelligence: I use advanced BI tools to analyze data and deliver insights that support better and faster strategic decisions.
• Sales Optimization: I implement data-driven frameworks that improve conversion rates and maximize commercial performance.
My work is based on structured thinking, clear objectives, and measurable impact. I focus on helping companies move from ideas to scalable and sustainable results.
If you're looking for someone who can combine strategy, data, and AI automation to accelerate your business, I would be glad to collaborate.
I look forward to the opportunity to work with you and contribute to your company’s growth.
Best regards,
Juan Rueda
Big Data
Business Analysis
Data Analytics
Customer Experience
Customer Analysis
Sales & Marketing
Sales Analytics
Administrate
IT Management
SQL
Oracle PLSQL
Cloud Database
Virlis M.
Bogota, Colombia
$25/hr
5.0
3 jobs
Need a reliable and results-driven developer to take care of your backend systems, integrations, or database performance? You’re in the right place.
What I can help you with:
Database modeling, optimization & complex SQL queries
Performance tuning of SQL queries based on Execution Plan and best practices
Backend development with Java (Spring Boot, Quarkus, JDBC)
Oracle Forms & reporting tools (Oracle Reports, JasperReports, or any tool you need)
Backend development with Visual Basic .Net
API development and integration (RESTful & SOAP)
Design and implementation of microservices
ETL processes and middleware development
Requirement analysis and high-performance solution delivery
Development of intelligent bots for scheduling and automation tasks (e.g. Google Calendar booking bots, WhatsApp messaging automation using Excel data extraction)
Tech stack:
Java 8, Spring Boot, Quarkus, Oracle, MySQL, SQL Server, PL/SQL, SOA, OSB, REST API, SOAP, JSON, Git, Visual Basic .Net, HTML, CSS
My GitHub profile showcases examples of SQL optimization, backend logic, and real code I've worked on. Feel free to check it out: github.com/vmoreira55
I don’t just write code — I design systems that are stable, efficient, scalable, and optimized for real-world demands. Whether it’s improving query performance through Execution Plan analysis, building microservices, integrating APIs, or developing smart bots for real business needs, I deliver clean, maintainable solutions built on professional standards.
I’m committed to clear communication, strong work ethic, and delivering results that make a difference — fast, reliable, and with long-term value.
Let’s connect and take your backend, database, or system integration to the next level.
Best regards,
Mr Virlis
SQL
Microsoft SQL Server
Visual Basic
Java
CSS 3
MySQL
HTML5
XML Web Services
Oracle Forms
Oracle PLSQL
Git
C#
.NET Framework
React
JavaScript
David Antonio M.
Bogota, Colombia
$35/hr
5.0
5 jobs
I’m a Backend Engineer specialized in Python with over 4 years of experience building scalable, high-performance systems across multiple industries, including tourism, insurance, real estate, video streaming, marketing, messaging/notifications, beauty/salon tech, startups, and blockchain/crypto (Bittensor).
As Founder and CTO of an award-winning tourism startup, I’ve led full-stack technical teams, defined software architecture from scratch, and launched robust platforms that have scaled to production with SEO, CI/CD, multichannel notifications, and integrated payments. My work has been recognized with national entrepreneurship awards and funding grants.
I bring a strong background in Python and its most powerful backend frameworks (Django, FastAPI, Flask), and I’ve used them to solve real-world problems in fast-paced, high-impact environments. From building data pipelines and microservices to integrating third-party APIs and writing tests with over 93% coverage — I’m all about clean, maintainable, and scalable backend systems.
Across Upwork and other international projects, I’ve completed long-term engagements (1,900+ hours, $10K+ earned) with clients from the U.S., Spain, Argentina, and Colombia, always delivering clean code, rock-solid architecture, and clear communication.
What I Do Best 🚀
✔ Python Backend Expert
Deep experience in Python and core frameworks: Django, FastAPI, Flask, Django REST Framework
Built complex RESTful APIs, webhook-based systems, and authentication flows (OAuth, JWT)
Architected systems using Ports & Adapters, microservices, and MVC patterns
Implemented asynchronous systems with Celery, BackgroundTasks, queues, and cronjobs
✔ Scalable Systems Across Diverse Industries
Tourism: CTO of a full-featured tourism startup with booking, SEO, payments, notifications, and CMS
Insurance: Integrated SOAP/REST services from insurance providers into a single Django backend (93%+ test coverage)
Real Estate: Aggregated data from multiple listing providers, created synchronization and ETL pipelines
Beauty & Salon: Built backend tools for dynamic service configuration, campaign rules, and client messaging
Streaming Media: Developed a RESTful backend with media management and recommendation logic (35% engagement boost)
Marketing & Notifications: Manage WhatsApp and Twilio, created campaign systems with advanced validation logic
Crypto & Blockchain (Bittensor): Built shell-based automation tools, miner installers, and contributed to open source infrastructure
Startups: Regularly involved in MVP design, scaling strategy, CI/CD pipelines, and team mentoring
✔ Infrastructure & DevOps for Real Projects
Provisioned and maintained environments on AWS (EC2, RDS, S3) and GCP
Used Docker, GitHub Actions, Terraform, and CI/CD pipelines for stable deployments
Automated developer environments and onboarding with Bash/Shell scripts, reducing setup time by 75%
✔ Data-Driven Integrations & ETL Work
Designed and deployed ETL flows with Airbyte, leveraging cloud storage (S3, GCP) and AI tools (LlamaIndex)
Connected and normalized data from external APIs, NoSQL, and relational DBs
Built dashboards, internal tools, and backend logic to make sense of data
✔ Engineering with Quality First
Developed test suites with Pytest, enforced code style with Ruff, Black, and pre-commit
Achieved 93%+ test coverage in several production systems
Maintained detailed technical documentation, READMEs, and onboarding material
✔ Leadership & Communication
As CTO, led a cross-functional team of devs and marketers, defined architecture, and maintained stakeholder communication
Managed development cycles with Jira, collaborated with frontend teams, and used Confluence for project alignment
Participated in open source (PRs merged) and mentored devs
Tech Stack Overview
Languages: Python, Bash, JavaScript, Go, Java
Frameworks: Django, FastAPI, Flask, Django REST Framework, Celery
Architecture: Microservices, Ports & Adapters, MVC, Factory, Strategy, Observer
Integrations: REST APIs, SOAP, Webhooks, WhatsApp, Twilio, Shopify, Wompi, OAuth2, Auth0
DevOps/Cloud: AWS (S3, EC2, RDS), GCP, Docker, GitHub Actions, Terraform, CI/CD, R2
Databases: PostgreSQL, MySQL, MongoDB, Firebase
ETL & AI: Airbyte, LlamaIndex
QA & Testing: Pytest, Ruff, Black, Postman
Project Tools: Jira, Confluence, GitHub, GitLab
SEO/Marketing: Facebook Ads, dynamic/static SEO optimization, conversion strategies
Achievements & Recognition
Winner – Collision EBT (MacondoLab – Universidad Simón Bolívar)
Winner – Nuestra Barranquilla (Fundación Corona) – Received ~$10K in pre-seed funding
Reduced dev onboarding time by 75% through Bash scripting
Boosted engagement by 35% through membership-based recommendation systems
Delivered systems with >93% test coverage, high uptime, and strong documentation
Worked across startups, SaaS platforms, and open-source ecosystems in 4+ countries
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
“Upwork provides an umbrella-level of security. I can see a talent’s work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.”
KD
Kim Darling
Emerald Tiger
“Upwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.”
DM
David Merry
Kinetic Investments
“Our very specific requirements can be a challenge—With Upwork, we’re able to access a bigger community to ensure the success of our projects.”
KK
Katja Krohn
Summa Linguae
How do I hire a SOAP Developer near Bogota, on Upwork?
You can hire a SOAP Developer near Bogota, on Upwork in four simple steps:
Create a job post tailored to your SOAP Developer project scope. We’ll walk you through the process step by step.
Browse top SOAP Developer talent on Upwork and invite them to your project.
Once the proposals start flowing in, create a shortlist of top SOAP Developer profiles and interview.
Hire the right SOAP Developer for your project from Upwork, the world’s largest work marketplace.
At Upwork, we believe talent staffing should be easy.
How much does it cost to hire a SOAP Developer?
Rates charged by SOAP Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.
Why hire a SOAP Developer near Bogota, on Upwork?
As the world’s work marketplace, we connect highly-skilled freelance SOAP Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream SOAP Developer team you need to succeed.
Can I hire a SOAP Developer near Bogota, within 24 hours on Upwork?
Depending on availability and the quality of your job post, it’s entirely possible to sign up for Upwork and receive SOAP Developer proposals within 24 hours of posting a job description.