Siddhant
Kumar

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25

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Full-Stack Development, VoIP/Telephony Engineering, AI & Automation, Infrastructure/DevOps, and Technical Operations

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$15/hr

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About me

I am a versatile Systems Engineer, Full-Stack Developer, and AI Integration specialist who builds resilient, high-throughput systems from 0 to 1. My professional background bridges enterprise tech support, telecom infrastructure maintenance at TELUS Digital, and freelance engineering for global clients across Europe and India. I don't just write code; I design, secure, and scale the infrastructure that powers it. My architecture expertise spans multi-tenant telecom platforms running load-balanced SIP proxies (Asterisk/Kamailio), local AI workflows, real-time Voice-AI integration via WebSockets, and low-latency backends maintaining sub-30ms execution pipelines. Proficient in Python, C/C++, TypeScript, FastAPI, PostgreSQL, AWS, Kubernetes, Docker, and Terraform, I deliver production-grade microservices and automated CI/CD workflows under strict delivery timelines. Available immediately for global remote roles up to 40 hours/week.

https://www.linkedin.com/in/sid-093/

https://github.com/S-V-J

Work experience

Concentrix

February 2021 – October 2021

Job title

Technical Support Advisor I

Work experience & achievements

Technical Support Advisor I | Concentrix (concentrix.com) Feb 2021 – Oct 2021 (9 months) | Office + Remote • Technical support for laptops and desktops — hardware faults (RAM, HDD, display, keyboard, power supply) and inbuilt software issues (OS, drivers, applications) for consumer and enterprise customers. • Remote access tools: Rescue, TeamViewer, AnyDesk — full remote device control for live diagnosis and repair. • CRM: SAP and MSD — case logging, escalation, and resolution documentation. • On-call 9-hour shifts in professional English and Hindi; B2C support via both soft and hard phones; Outlook for email; Excel for data entry and call reporting.

TELUS Digital

January 2022 – August 2025

Job title

Network Associate

Work experience & achievements

Network Associate | TELUS Digital — Canada (telusdigital.com) Jan 2022 – Aug 2025 (3 yrs 8 months) | Remote • Command-based programming, testing, and troubleshooting of telephony switches GTD 5 and DMS 100—maintaining enterprise telephony infrastructure for Canada's largest telecom provider. • Resolved SIP and ISUP call-related issues and SIP Trunking service problems—call tracing and pcap file analysis using IRIS, CGIS, and Wireshark to diagnose protocol-level failures. • CRM management with Lynx and ServiceNow—full incident lifecycle, escalation, RCA documentation, and professional English communication with Canadian business clients (B2B). • Remote role: softphone-based calls, Outlook for client email, and Excel for tracking and data entry.

Basal Analytics Pvt. Ltd

December 2025 – December 2025

Job title

VoIP AI Integration Engineer

Work experience & achievements

VoIP AI Integration Engineer | Basal Analytics Pvt. Ltd. (desible.ai) Dec 2025—30-day delivery • Configured Asterisk PBX with the AudioSocket module and wrote a Python WebSocket client bridging live calls to Desible AI's voice AI engine—enabling real-time AI handling of answered outbound calls. • Architecture: outbound calls originated by partner company, routed to this Asterisk endpoint; calls transferred to AI on answer—full end-to-end outbound AI call pipeline. • Deployed and configured on AWS EC2 (Linux Ubuntu); SIP trunk setup for call origination partner. ◦ Stack: Asterisk, AudioSocket, Python, WebSocket, SIP trunk, AWS EC2, Linux Ubuntu, Kamailio

Raiva

October 2025 – January 2026

Job title

AI Backend Developer

Work experience & achievements

AI Backend Developer | Raiva—Germany (raiva.io) Oct 2025 – Jan 2026 (4 months) • Built a document indexing and search portal enabling users to query large document repositories by both text input and real-time voice—semantic NLP search with conversational AI responses and live voice chat. • Integrated OpenAI API for NLU query processing, Whisper for voice-to-text, and real-time conversational AI for document-grounded dialogue. • Deployed on Hetzner Cloud (Linux Ubuntu); REST API backend with web portal frontend. ◦ Stack: Python, OpenAI API, Linux Ubuntu, Hetzner Cloud, document indexing, semantic search, REST API, Conversational AI, real-time voice, PostgreSQL

Lancelot Technology

August 2025 – September 2025

Job title

VoIP Engineer

Work experience & achievements

VoIP Engineer | Lancelot Technology (lancelotech.com) Aug–Sep 2025—45-day delivery • Configured Asterisk and Kamailio PBX across two separate Ubuntu servers with a custom admin panel for complete PBX management—extension provisioning, call routing, and tenant management. • Designed and implemented multilingual IVR with voice and language detection and voice prompt playback for intelligent caller input routing. • Configured SIP trunks on both servers; full project delivered within 45 days. ◦ Stack: Asterisk, Kamailio, Linux Ubuntu (2 servers), SIP trunk, IVR, voice prompt, language detection, Python, Bash, admin panel development

IWALINK SA

May 2025 – June 2025

Job title

VoIP & PBX Engineer

Work experience & achievements

VoIP & PBX Engineer | IWALINK SA—Switzerland May–Jun 2025—51-day delivery • Configured Asterisk PBX on a hosted hard server—softphone login, inbound/outbound calls, voicemail, IVR system, and SIP trunk integration delivered from scratch. • Wrote Bash automation scripts and Python AGI (Asterisk Gateway Interface) programs for dynamic call routing logic and IVR intelligence. • Developed an admin panel for ongoing PBX management—extension control, call routing, SIP trunk status, and IVR menu editing. ◦ Stack: Asterisk, SIP trunk, IVR, AGI (Python), Bash scripting, Linux Ubuntu, .conf file management, softphone, voicemail, admin panel (Python/web)

Education

Visvesvaraya Technological University (VTU), Belagavi, Karnataka, India

Graduation year: 2023

Level of study

Bachelor

Major / Field of study

Bachelor of Engineering — Electronics & Communication Engineering

CV

SIDDHANT_KUMAR.pdf