Freelance Web Developers in BelgradeFreelance Web Developers in Belgrade
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Petar Vasic's avatar
Petar Vasic
Belgrade, Serbia
Senior Software Engineer & Low-Code Development Expert
$25k+
Earned
2x
Hired
4.8
Rating
18
Followers
Senior Software Engineer & Low-Code Development Expert
Cover image for Online B2B2C Retail App for Cars
Online B2B2C Retail App for Cars
0
51
Cover image for Agile Underwriting
Agile Underwriting
0
40
Cover image for Real Estate B2B Guest Booking App
Real Estate B2B Guest Booking App
0
76
Cover image for E-commerce offers AI vector search: from Amazon, Walmart
E-commerce offers AI vector search: from Amazon, Walmart
0
20
Web Developer(3)
Engjell Developer's avatar
Engjell Developer
proBelgrade, Serbia
Software Developer | CO FOUNDER at Aligator.xyz
5.0
Rating
43
Followers
Software Developer | CO FOUNDER at Aligator.xyz
Cover image for Helloouu there, do you find
Helloouu there, do you find this website attractive www.furnishot.com
1
102
Cover image for After 5+ years… I finally killed my 2019 portfolio 😂 Just l...
After 5+ years… I finally killed my 2019 portfolio 😂 Just launched the new one this weekend: www.engjell.dev (http://engjell.dev) Clean, fast, and has a 3D cartoon me because I thought it was funny. Let me know what you think (honest feedback welcome)! Currently open for new projects if anyone needs a new site 🚀 #webdeveloper #portfolio #tailwind #nextjs
6
6
250
Cover image for Guys, I tried blending modern design with nature… what do yo...
Guys, I tried blending modern design with nature… what do you think? luxholz.ch (http://luxholz.ch)Website for wood flooring company in Swiss 🇨🇭
17
50
525
Cover image for ESRA-KS Website and CMS Development
ESRA-KS Website and CMS Development
0
7
Web Developer(8)
Maria R's avatar
Maria R
proBelgrade, Serbia
Web Design. Animation. Pitch Decks. AI-Generated Images.
34
Followers
Web Design. Animation. Pitch Decks. AI-Generated Images.
Cover image for Portfolio Website - Karolina Grabowska
Portfolio Website - Karolina Grabowska
1
7
Cover image for OPRIL Artistic Vision Garments
OPRIL Artistic Vision Garments
1
7
Cover image for Italian Restaurant and Food Delivery
Italian Restaurant and Food Delivery
1
6
Cover image for FLORA's Custom Actions are way to inspiring 👀
FLORA's Custom Actions are way to inspiring 👀
2
4
239
Web Developer(3)
Jovan Lakic's avatar
Jovan Lakic
proBelgrade, Serbia
Senior Designer · Brand & Digital · Web Design & Development
41
Followers
Senior Designer · Brand & Digital · Web Design & Development
Cover image for weareosm
weareosm
0
3
Cover image for General Condition Studio
General Condition Studio
1
2
Cover image for Misha Obradovic
Misha Obradovic
0
6
Cover image for Savaball 2024
Savaball 2024
0
6
Web Developer(9)
Darko Tokanovic's avatar
Darko Tokanovic
Belgrade, Serbia
AI voice agents that answer calls and book appointments
New to Contra
AI voice agents that answer calls and book appointments
Cover image for I built a workflow that
I built a workflow that turns a business website into a testable AI phone receptionist. The system analyzes the website, extracts services, staff, opening hours, policies, and other relevant information, then creates an isolated voice-agent demo for that business. Instead of sending a generic recording, we can provide a real phone number that allows the business to test the agent through an actual call. When the website or scheduling system supports an integration, the agent can check availability and book appointments during the call. Otherwise, it safely captures the caller’s details and preferred time for staff follow-up. If a business decides to continue after the demo, the same foundation can be expanded into a production receptionist with databases, customer-specific business rules, calendar and CRM integrations, confirmations, call summaries, analytics, and administrative controls. The extracted information can also reveal gaps in the business website. Its content and structure can then be improved so both visitors and the AI receptionist receive clearer, more reliable information. The main lesson I share is that website extraction alone is not enough. Information must be normalized, validated, and restricted to the source material before it can be used safely in a live voice conversation. The demonstration uses a fictional dental clinic and real recordings from my working voice-agent system. No patient data, real customer information, or invented testimonials are included. I used Descript to assemble and refine the presentation, edit the narration and real-call sections, create captions, and prepare the final submission.
4
533
Cover image for I designed and developed the
I designed and developed the operating layer behind a family of AI phone receptionists. The voice conversation is only the customer-facing surface. This platform gives business owners and administrators the tools required to understand, control and improve what happens during real telephone calls. The system supports multiple specialized workspaces, including dental practices, veterinary clinics, hair salons and beauty businesses. Each workspace has isolated services, staff, schedules, business information, appointment rules and agent instructions. Key capabilities include: • Centralized call and project overview • Call recordings and complete transcripts • Structured call summaries and extracted caller intent • Appointment status and outcome tracking • Service, staff and schedule administration • Business hours, pricing, promotions and knowledge management • Transfer and escalation configuration • Email confirmations and appointment management links • Voice, web, database and recording health monitoring • Web and React Native administration • Separate business workspaces on one shared architecture I developed the backend APIs, database models, administrative interfaces, authentication, email workflows, monitoring, deployment and integration with the real-time voice services. This project demonstrates that the system is more than an AI voice demo. It includes the operational controls, review workflow and verified action tracking required for real business use. This is an independently developed product, not a paid client project.
0
58
Cover image for I designed and developed a
I designed and developed a specialized AI phone receptionist for veterinary clinics. The system handles real PSTN and SIP calls through FreeSWITCH. It combines streaming speech recognition, LLM orchestration and low-latency voice synthesis to communicate naturally with pet owners. The agent can answer questions about veterinary services, business hours, location, parking and clinic policies. It can identify the pet owner’s reason for calling, distinguish routine appointment requests from potentially urgent situations, check configured availability and guide the caller through a veterinary visit request. The system includes: • Real US telephone and SIP call handling • Pet-aware reason-for-visit collection • Routine, sick-visit and urgent-request routing • Veterinary service and provider information • Appointment booking, rescheduling and cancellation flows • Email confirmations and owner notifications • Safe escalation for urgent or unresolved situations • Call recordings, transcripts and structured summaries • Appointment status and administrative review • Configurable services, staff, schedules, policies and instructions • Replaceable speech recognition, LLM and voice providers I developed the telephony architecture, real-time conversational pipeline, backend APIs, veterinary call flows, appointment logic, email integration, administration, deployment and real-call testing. The agent does not diagnose animals or replace veterinary judgment. Urgent, uncertain or clinically sensitive requests are handled according to configured escalation rules. This is an independently developed product, not a paid client project.
3
2
245
Cover image for I designed and developed Anna
I designed and developed Anna Dental AI, a specialized phone receptionist for dental practices. The system answers real PSTN and SIP calls through FreeSWITCH and combines streaming speech recognition, LLM orchestration and low-latency voice synthesis to hold natural telephone conversations. Anna can answer questions about dental services, expected price ranges, business hours, providers and clinic policies. It can identify the requested treatment, match the caller with an appropriate provider, check configured availability and guide the caller through an appointment request. The system also includes: • Real US telephone and SIP call handling • Dental service and provider matching • Price, hours, location and policy questions • Appointment booking, rescheduling and cancellation flows • Email confirmations and appointment management links • Safe escalation for unresolved or sensitive requests • Call recordings, transcripts and structured summaries • Appointment status and administrative review • Configurable services, staff, schedules and agent instructions • Replaceable speech recognition, LLM and voice providers I developed the telephony architecture, real-time voice pipeline, backend APIs, appointment workflows, email integration, web administration, deployment and testing. The agent is designed for administrative communication and scheduling. It does not provide diagnoses or replace professional clinical judgment. This is an independently developed product, not a paid client project.
1
138
Web Developer(2)