Houston-based — one engineer, not an agency
Tekintegro builds custom web applications — and does the part most agencies walk away from: dependency upgrades, security patching and production maintenance, month after month, on systems that are already live.
The flagship service
Shipping is only day one. Dependencies drift, CVEs land, frameworks reach end of life, and then the security questionnaire from your biggest prospect asks how you handle all three. I operate and maintain production systems so those answers stay easy to give.
Observability and alerting configured on your stack, with alerts routed to me. Acknowledged within four business hours, Monday to Friday, and owned until resolved. Overnight and weekend coverage is a separate arrangement priced separately — I would rather write that down than imply it.
Continuous upkeep of your codebase: bug fixes, dependency upgrades and small enhancements, delivered on a steady cadence with a written record of every change.
Profiling, query optimization, caching and load testing to keep response times low as your traffic and data grow.
Scheduled dependency and OS patching, CVE triage across Maven and Gradle trees, certificate management, and least-privilege access reviews. The evidence trail is the part your SOC 2 auditor and your customers' security questionnaires actually ask for.
Day-to-day AWS operations — scaling, backups, disaster recovery — plus monthly cost reviews that keep your bill in check.
Safe, repeatable deployments with automated pipelines, staged rollouts and instant rollback plans — releases become routine, not risky.
I audit your codebase, dependency tree, infrastructure and monitoring to map risks and quick wins.
I fix urgent issues, add observability, and establish backups and runbooks.
I take it from there: monitoring, scheduled patching, and a written response window.
Monthly reports, performance tuning and a roadmap that stays ahead of demand.
Hand it over. I'll keep it patched, monitored and documented — and send you the report that proves it. It starts with a free, no-obligation health check of your system.
Build with me
Everything I build is designed to be operated — instrumented, documented and ready for the long run from day one.
Web applications built with Java, Spring Boot, React, and AWS microservices — tailored to your business and designed for scalability and easy operation.
Migrations, microservices, and cloud-native architecture on AWS — built to be monitored and maintained, not just deployed.
Spring Boot 2.7 and 3.x are past end of open-source life, which means CVE patches have stopped reaching Maven Central and auditors flag it. I plan and execute the upgrade in reviewable increments, with the test suite green at every step.
About Tekintegro
Tekintegro is one engineer, not an agency. I'm Tung Nguyen, based in Houston. I build web applications on Java, Spring Boot, React and AWS — and then I stay on to keep them patched, monitored and audit-ready.
Working with me means the person who wrote the code is the person who answers when something breaks. No account manager, no handoff to a junior team, no discovery call with three people on it. It also means I take a small number of clients at a time, and that I will tell you plainly when a project is not a fit for that.
Uptime isn't a feature you ship once. It's a promise you keep every day.
— The Tekintegro operating principlePortfolio
A certification manager for competitive professionals. I built it, and I've kept it running, patched and fast ever since.
Visit CertWalletApp →I love Tung's work ethic, his grind, and ambitions. As long as we maintain course, I will be using Tung on this project for a long time. He truly saved my business and helped me have a better experience than I had with my previous developer.
Ricky West
CEO, CertWalletApp
Contact
Tell me about your project — or your production headaches. I reply within one business day with next steps, or a free health check if you're already live.
info@tekintegro.com