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Andrew C.
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Andrew C.

Solutions Architect / Senior Engineer / Java Engineer - 25 years

Senior backend & cloud engineer with 25 years shipping production systems in Java, Go, and AWS. I've built and operated the kind of services that can't go down: high-traffic streaming at Warner Bros. Discovery (1k–5k req/sec, 24/7/365 uptime), card management and rewards platforms at Capital One, and core banking services for Bank of America via Infosys. What I do best: 🔹 Backend services — Java (1.4 through 25), Spring Boot, Go. Clean APIs, sensible architecture, no over-engineering. 🔹 Cloud & DevOps — AWS, Azure, GCP. Terraform IaC, GitHub Actions, CI/CD pipelines that actually work on the first try. 🔹 Databases — Postgres, Oracle, MySQL, DB2, MongoDB. Schema design, query tuning, migrations. I've fixed slow queries that other people gave up on. 🔹 Microservices & event-driven systems — Kafka, REST, message brokers, service mesh. I've broken monoliths into microservices and lived to tell about it. 🔹 Mobile + cloud — currently wrapping up an iOS/Android/AWS MVP with full telemetry pipeline. How I work: I own the work end to end. You tell me the outcome you need; I figure out the path. I write the code, run the deploys, debug production, and document what I built so the next person isn't lost. I've worked solo and on teams up to a dozen. Comfortable in regulated environments (finance, healthcare) and lean startups alike. I lean heavily on modern AI tooling (Copilot, Claude, Kiro, Gemini, Grok) — I move faster than I did two years ago without cutting corners on quality. Recognition: Open Source Thought Leader (2016) Apache Software Foundation expert; spoke at Apache conferences on microservice architecture and security Top 60 of thousands — IBM Master the Mainframe Competition U.S. Army veteran (Operation Iraqi Freedom) Looking for: long-term contracts where I can own a system, not just a ticket. Available immediately. Background check / drug test ready. Eligible for U.S. secret clearance. If your project needs someone who can read a 5,000-line legacy codebase on Monday and ship a fix on Tuesday — let's talk.

🇺🇸Greeneville, United States$90/hr100% JSS4.98 (14)Since Mar 2012

Earnings and projects

MRR
$4.5k

Last 6 months ÷ 6

World#6,435 / 412k
🇺🇸Country#2,082 / 62.1k
Revenue, last 30 days
$0

Last 6 months: $27k

Total earnings
$79k

Billed in all: $84k

World#50,582 / 412k
🇺🇸Country#9,839 / 62.1k
Per project
$3.7k

$27k in the last 6 months

World#45,723 / 412k
🇺🇸Country#7,626 / 62.1k
Projects, last 6 months
1
0% fixed100% hourly
World#128,092 / 412k
🇺🇸Country#16,472 / 62.1k
Projects in all
21

Across 25 contracts

60% fixed40% hourly
World#128,797 / 412k
🇺🇸Country#18,743 / 62.1k

Earnings, last 30 days

$83.7kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$82k$83k$84k$85kOct 8Oct 23Nov 7

Skill rankings: #1 in 1 skill of 14

Rarest: top 2% in jQuery, of 8,973. Ranked by MRR among everyone on Upwork with the skill.

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  6. #58Apache Kafka981 freelancers · 🇺🇸 #2Top 6%
  7. #64Golang2,195 freelancers · 🇺🇸 #9Top 3%
  8. #79Azure DevOps2,096 freelancers · 🇺🇸 #18Top 4%