Freelancers using Java

Freelancers using JavaFreelancers using Java

Projects People

proNew Delhi, India

Mobile App Architect • React Native Expert • 50+ App Shipped

$5k+: Earned

1x: Hired

5.0: Rating

20: Followers

Mobile App Architect • React Native Expert • 50+ App Shipped

Cover image for Dream Planner - AI-Powered Goal Planning Platform

Dream Planner - AI-Powered Goal Planning Platform

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Cover image for GyneAssist - On The Go PMS

GyneAssist - On The Go PMS

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11

Cover image for Trainerfu - Seamless Coaching & Client Tracking

Trainerfu - Seamless Coaching & Client Tracking

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17

Cover image for CryptoShorts – Stay Ahead in Crypto, Instantly

CryptoShorts – Stay Ahead in Crypto, Instantly

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16

Developer, Writer, Researcher

$1k+: Earned

5x: Hired

5.0: Rating

19: Followers

Developer, Writer, Researcher

Cover image for Tracing a False Positive in FBInfer’s Purity Analyzer

Tracing a False Positive in FBInfer’s Purity Analyzer

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Cover image for Author @StackAbuse

Author @StackAbuse

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Cover image for Founding Engineer | Fullstack

Founding Engineer | Fullstack

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Cover image for @bardeen.ai

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Websites & video ads that generate enquiries & sales

5.0: Rating

7: Followers

Websites & video ads that generate enquiries & sales

Cover image for 🧾 Billing CRM – Simplify

🧾 Billing CRM – Simplify Your Business! ⚡ E-Way Bill & Invoice Generation 📊 Outstanding & Ledger Management 👥 Customer & Team Access 📈 Reports & Business Dashboard 🔐 Secure & Reliable ♾️ Lifetime Free Access 🌐 www.yogiwebsites.com (http://www.yogiwebsites.com)

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11

Cover image for I deploy custom, self-hosted YoGi

I deploy custom, self-hosted YoGi CRM setups that eliminate monthly SaaS fees and give you 100% data privacy. Visit:- www.yogiwebsites.com (https://www.yogiwebsites.com)

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43

Cover image for Building a Shopify store is

Building a Shopify store is easy. Managing SEO, 30+ product listings, high-converting descriptions, and page functionality after it's built? That’s where most e-commerce founders fail. 🛑 Stop stressing over back-end setup. As Authorized Shopify Partners, we handle complete store setups—from SEO titles to 30 product listings. 💡 We produce promotional videos in both real Human & AI formats! 🚀 Free demo: www.yogiwebsites.com (http://www.yogiwebsites.com)📲 WhatsApp: +91-98333-398688 #ShopifyPartner #EcommerceGrowth #ShopifyStore #WebDesign

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Cover image for Having a "pretty" basic website

Having a "pretty" basic website in 2026 is a complete waste of money. 🧵 If your site isn't actively generating leads, building trust, and converting traffic, it’s failing. You need a complete growth stack—sales design, SEO, and engaging video content (human or AI). Stop settling. Build an asset that converts. 💻 See your FREE demo first: www.yogiwebsites.com (http://www.yogiwebsites.com)📲 WhatsApp: +91-98333-398688

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33

proEnglishtown, USA

Senior Full-Stack Engineer helping startups build Products.

$25k+: Earned

1x: Hired

4: Followers

Senior Full-Stack Engineer helping startups build Products.

Cover image for SUPERMODEL

1

23

Marketech | Maximize your brand's revenue potential

1

11

Cover image for Why Choose Dealty vs. others?

Why Choose Dealty vs. others?

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12

Cover image for Lead Scout™ | Need a better Canvassing App? Look no further.

Lead Scout™ | Need a better Canvassing App? Look no further.

1

11

Alex Shchetynin

proBarcelona, Spain

Full-Stack Web&Mobile Development | UI/UX Design

13: Followers

Full-Stack Web&Mobile Development | UI/UX Design

Cover image for AURLIX - a next-generation crypto trading platform.

AURLIX - a next-generation crypto trading platform.

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28

Cover image for CRYPTO MINER

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21

Cover image for SWIPELUX Crypto Exchange Platform with Card Payment Integration

SWIPELUX Crypto Exchange Platform with Card Payment Integration

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24

Cover image for Paysera Payments Platform for Seamless Global Transactions

Paysera Payments Platform for Seamless Global Transactions

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25

Product-minded Software Engineer | Backend, APIs & Workflows

7: Followers

Product-minded Software Engineer | Backend, APIs & Workflows

Cover image for From a Business Proposal to a Buildable Backend System

From a Business Proposal to a Buildable Backend System

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11

Cover image for Payment Lifecycle Integration Backend

Payment Lifecycle Integration Backend

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10

Cover image for AI-Assisted Decision Workflow for Reliable Operations

AI-Assisted Decision Workflow for Reliable Operations

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18

Cover image for Explainable Decision Engine for Rule-Driven Systems

Explainable Decision Engine for Rule-Driven Systems

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8

Kalpesh Prajapati

Ahmedabad, India

Experienced Senior Software Development Engineer

New to Contra

Experienced Senior Software Development Engineer

Cover image for Baccarat — real-time multiplayer card

Baccarat — real-time multiplayer card game: An online Baccarat table where players bet, deal and settle in real time, together. Multiple players sit at the same table and watch the same round unfold at the same instant, so every client has to stay in sync to the card. A server-authoritative game loop runs the round — betting window, deal, third-card rule, settlement — and pushes state over WebSockets, which means no client can influence the outcome. The shoe is shuffled with a cryptographically secure RNG and every round is recorded, so any hand can be replayed and verified after the fact. **Built** - Player / Banker / Tie betting with per-round bet windows and limits - Real-time multiplayer tables synchronised over WebSockets - Server-authoritative game loop implementing full Baccarat drawing rules - Cryptographically secure RNG shuffle with a verifiable, replayable round log - Automatic settlement, payout and per-player hand history

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37

Cover image for A healthcare booking platform connecting

A healthcare booking platform connecting patients with the right doctor: Patients search by speciality, see genuinely live availability, and book a slot in a few taps. The hard part is concurrency: two patients tapping the same 10:30 slot at the same moment must not both get it. Slot locking and transactional booking make that safe, and reminders cut no-shows. Built - Doctor search and profiles with speciality and location filters - Real-time slot availability with race-safe booking and cancellation - Appointment lifecycle: book, reschedule, cancel, remind - Patient records with role-based access, so staff see only what they should

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Cover image for An e-commerce storefront for buying,

An e-commerce storefront for buying, gifting and redeeming digital gift cards. Customers pick a card and an amount, pay through a secure checkout, and the recipient gets the card by email within seconds. Behind it sits the part that actually matters: a balance ledger that stays correct under concurrent redemptions, idempotent payment handling so a retried request never double-charges, and a full audit trail of every issue and redemption. Built - Card catalogue, custom amounts and gift-to-a-friend flow - Payment gateway integration with idempotent, retry-safe order handling - Email delivery pipeline for instant card issuance - Balance, partial redemption and expiry logic backed by a transactional ledger

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51

Cover image for A central authorization service that

A central authorization service that decides who can do what — in real time: Instead of permission checks scattered through every service, one engine answers a single question: given this user, this action and this resource, ALLOW or DENY? Policies combine roles (RBAC) with attributes (ABAC) — department, ownership, region, time of day — so product teams change a policy instead of shipping code. Every decision is logged, which is what auditors actually ask for. Built - Role-based and attribute-based policy evaluation - Low-latency decision API with policy caching - Policy authoring and versioning, so changes are reviewable and reversible - Immutable audit log of every allow/deny decision

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42

Software Engineer and Technical Leader

5.0: Rating

9: Followers

Software Engineer and Technical Leader

Cover image for Multi-Year Strategy for Data Platform

Multi-Year Strategy for Data Platform

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11

Cover image for Internet-of-Things analytics platform

Internet-of-Things analytics platform

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16

Cover image for Paid Social data pipeline

Paid Social data pipeline

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17

Cover image for Competitor Reporting data pipeline

Competitor Reporting data pipeline

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