You will get a production-ready Kotlin REST API with PostgreSQL for your app
Project details
You get a custom Kotlin/Java REST API with PostgreSQL - built in your repository, scoped to your app, and ready for your frontend or mobile client to integrate.
I specialize in backend APIs for startups and small teams: clear endpoints, versioned database migrations, validation, tests, and a README so your team can run and extend the project. Standard and Advanced tiers include authentication; Advanced adds API documentation and deployment guidance on your cloud account.
I've shipped and maintained production backend services for a live subscription product — auth, webhooks, background jobs, and Postgres at scale - so you get engineering habits that hold up after launch, not throwaway prototype code.
Every project is delivered to your accounts: your repo, your database, your credentials. Fixed scope per tier, included revisions, and a handoff call to walk through the codebase.
Scope is agreed at kickoff from the requirements you submit after purchase.
I specialize in backend APIs for startups and small teams: clear endpoints, versioned database migrations, validation, tests, and a README so your team can run and extend the project. Standard and Advanced tiers include authentication; Advanced adds API documentation and deployment guidance on your cloud account.
I've shipped and maintained production backend services for a live subscription product — auth, webhooks, background jobs, and Postgres at scale - so you get engineering habits that hold up after launch, not throwaway prototype code.
Every project is delivered to your accounts: your repo, your database, your credentials. Fixed scope per tier, included revisions, and a handoff call to walk through the codebase.
Scope is agreed at kickoff from the requirements you submit after purchase.
Programming Languages
HTML & CSS, Java, KotlinCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$900
|
Standard
$1,800
|
Advanced
$3,200
|
|---|---|---|---|
| Delivery Time | 10 days | 21 days | 35 days |
Number of Revisions | 1 | 2 | 2 |
Number of Pages | 5 | 12 | 20 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional 5 API endpoints
(+ 2 Days)
+$250
OpenAPI (Swagger) spec
(+ 1 Day)
+$150
Deploy setup on your cloud account
(+ 2 Days)
+$400Frequently asked questions
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JB
Jonathan B.
Jul 16, 2026
Android App Sign Up Testing (5 Minute Gig) - US ONLY
Kevin was great. I appreciate the effort. You did exactly what I asked.
About Kevin
QA Testing | Agile Software Development
Santa Ana, United States - 10:42 am local time
and open-source projects, strong Linux background, and a track record of building tools, automating workflows, and
shipping reliable software in Agile teams.
Steps for completing your project
After purchasing the project, send requirements so Kevin can start the project.
Delivery time starts when Kevin receives requirements from you.
Kevin works on your project following the steps below.
Revisions may occur after the delivery date.
Confirm scope and API outline
Review your requirements, agree on endpoints and resources for your tier, and confirm auth and database approach before coding.
Set up project and database
Create the Kotlin or Java project in your repo, configure Postgres, and add initial migrations for your core tables.