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Daniel Marvin F.

Daniel Marvin F.

Delphi Expert/Developer

With over 40 years of software development experience and three decades dedicated to Delphi, I bring deep expertise and proven results to every project. Certified in Delphi by Embarcadero Academy, I have worked with every version of the language, designing, developing, and supporting complex applications across industries. My track record includes rescuing failing projects, modernizing legacy systems, and ensuring long-term stability by addressing technical debt, performance bottlenecks, and memory leaks. I am highly skilled in working with third-party component systems such as DevExpress, TMS, Woll2Woll, and n software, and I excel at quickly understanding complex code bases. My database experience spans MS SQL, MySQL, Oracle, Interbase, and more, giving me the versatility to integrate and optimize applications across diverse environments. Having led multiple Delphi teams, I combine strong technical leadership with a hands-on approach. I am known for working independently with minimal supervision, while also asking the right questions and seeking resources to ensure success. Whether building new solutions or revitalizing existing ones, I deliver reliable, efficient, and future-ready results.

🇺🇸Spokane Valley, United States$45/hr100% JSSSince Mar 2017

Earnings and projects

MRR
$4.9k

Last 6 months ÷ 6

World#5,560 / 412k
🇺🇸Country#1,855 / 62.1k
Revenue, last 30 days
$4k

Last 6 months: $30k

World#8,088 / 412k
🇺🇸Country#2,336 / 62.1k
Total earnings
$47k

Billed in all: $49k

World#79,870 / 412k
🇺🇸Country#14,342 / 62.1k
Per project
$24k

$30k in the last 6 months

World#4,557 / 412k
🇺🇸Country#905 / 62.1k
Projects, last 6 months
1
0% fixed100% hourly
World#128,092 / 412k
🇺🇸Country#16,472 / 62.1k
Projects in all
2

Across 3 contracts

67% fixed33% hourly
World#328,886 / 412k
🇺🇸Country#47,959 / 62.1k

Earnings, last 30 days

$49.4k+$4k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$45.0k$47.5k$50.0kOct 8Oct 23Nov 7

Skill rankings: #1 in 1 skill of 7

Rarest: top 1% in Wix, of 4,075. Ranked by MRR among everyone on Upwork with the skill.

  1. 1Pascal25 freelancers · 🇺🇸 #1Top 4%
  2. #5Delphi130 freelancers · 🇺🇸 #3Top 4%
  3. #16Web Service559 freelancers · 🇺🇸 #5Top 3%
  4. #31Mailchimp2,594 freelancers · 🇺🇸 #14Top 1%
  5. #44Wix4,075 freelancers · 🇺🇸 #20Top 1%
  6. #62Database Design2,161 freelancers · 🇺🇸 #22Top 3%
  7. #80App Development2,592 freelancers · 🇺🇸 #28Top 3%