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Esteban Z.

Esteban Z.

Developer

We don’t sell templates or prebuilt products. Every company works differently — so we design and build systems around how your business actually runs, then stay to support and improve them over time. Led by Esteban (Senior Solutions Architect, ex-Tier 4 Twilio) with 8+ years working on APIs, SaaS platforms, and production systems — the kind of environments where things break and need real solutions. Alongside: • Maria — operations, customer support, organization • Emanuel — engineering, development, system stability We work as one unit, not separate freelancers. 🧠 How we approach your business We don’t start with code — we start with understanding how things actually work. We meet with you and your team, observe real workflows, and identify: • where time is being lost • where systems don’t connect • where work is repetitive Then we design something that fits your reality — not a generic workflow. Most companies run on 3–5 disconnected tools. We bring that into one system that actually makes sense for your team. 🧱 What we build • Internal platforms (web + mobile) • Contact centers (Twilio / custom / AWS) • Automation systems + AI integrations • CRM & operations tools • Long-term support and continuous improvements Everything is modular — built to grow with you. 🚀 Example — Our First Client in the Solar Industry: We built and maintain their internal operating system. Before: • Multiple tools • Disconnected workflows • Manual processes Now: • One unified system (web + mobile) • Ops, comms, scheduling, HR, finance in one place • Automation handling repetitive work We meet twice per week, improving continuously. New needs → added as modules (no rebuilding, no chaos). Result: • Less tool switching • Lower software costs • Better team coordination 💼 How we work Understand your current setup Analyze workflows as a team Design a system around your operation Build, deploy, and keep improving We stay involved — this isn’t “deliver and disappear.” 🤝 What we’re looking for We’re not chasing volume. We’re looking for 1–2 companies that want to: • build something solid • improve operations over time • work with a team long-term

🇨🇷Santa Cruz, Costa Rica$50/hr100% JSSSince Sep 2021

Earnings and projects

MRR
$2.5k

Last 6 months ÷ 4.7 months active (since Jun 2026)

World#17,004 / 412k
🇨🇷Country#38 / 515
Revenue, last 30 days
$2.5k

Last 6 months: $12k

World#15,803 / 412k
🇨🇷Country#32 / 515
Total earnings
$12k

Billed in all: $12k

World#182,753 / 412k
🇨🇷Country#240 / 515
Per project
$12k

$12k in the last 6 months

World#12,861 / 412k
🇨🇷Country#38 / 515
Projects, last 6 months
1
0% fixed100% hourly
World#128,092 / 412k
🇨🇷Country#127 / 515
Projects in all
1
0% fixed100% hourly
World#360,671 / 412k
🇨🇷Country#417 / 515

Earnings, last 30 days

$12.5k+$2.5k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$8k$10k$12k$14kOct 8Oct 23Nov 7

Skill rankings: Top 3% in CallTools Call Center Software

Ranked by MRR among everyone on Upwork with the skill.

  1. 2CallTools Call Center Software71 freelancers · 🇨🇷 #1Top 3%
  2. #9Call Center Software91 freelancers · 🇨🇷 #1Top 10%
  3. #62Twilio743 freelancers · 🇨🇷 #1Top 8%
  4. #66Twilio API710 freelancers · 🇨🇷 #1Top 9%
  5. #104AI Builder1,112 freelancers · 🇨🇷 #1Top 9%
  6. #846Automation12,739 freelancers · 🇨🇷 #6Top 7%