Yasoob Ahmad
Verified Expert in Engineering
Back-end Developer
Lahore, Punjab, Pakistan
Toptal member since September 3, 2026
Yasoob has spent five years building and optimizing back-end systems across AI, telecom, and high-traffic production environments. His toolkit centers on Elixir, Python, and Ruby on Rails. At Voiger, Yasoob reduced end-to-end response latency by approximately 40% through real-time voice workflow engineering.
Portfolio
Experience
- Back-end Development - 5 years
- System Design - 5 years
- Redis - 5 years
- Ruby on Rails - 5 years
- Databases - 5 years
- Elasticsearch - 4 years
- Python - 3 years
- Elixir - 2 years
Preferred Environment
Docker, Cloudflare, Databases, Servers, AI Agents, ELK (Elastic Stack), Programming, System Design, Amazon Web Services (AWS), AI Chatbots
The most amazing...
...real-time voice workflow I've built reduced end-to-end response latency by approximately 40% for a production AI telephony platform.
Work Experience
Senior AI Back-end Engineer
Voiger
- Built real-time voice workflows integrating telephony, LLM, STT, and TTS components, reducing end-to-end response latency by approximately 40%.
- Designed a modular speech pipeline with provider abstraction and diarization, integrating ElevenLabs, AssemblyAI, Fish Audio, OpenAI, and on-premise WhisperX.
- Integrated speech-to-text processing into live voice workflows, enabling conversation transcription and downstream processing during active communication.
- Designed and developed a production Python microservice using LiteLLM to orchestrate 3rd-party and on-premise LLMs for automated call summaries, conversation analysis, and sentiment insights, contributing approximately $3,000 a month.
- Engineered distributed services around FreeSWITCH to manage call flows, audio recordings, telephony state, and communication between real-time back-end services.
- Developed WebSocket-based dashboards and back-end services, combining live operational visibility with historical reporting and analysis.
- Optimized asynchronous processing and service integrations across AI and voice workflows to reduce redundant processing and improve production responsiveness.
- Applied cloud deployment, monitoring, centralized logging, metrics, dashboards, and alerting practices while leveraging Claude, Cursor, OpenClaw, Hermes, coding agents, and MCP tooling to accelerate back-end development by approximately 30%.
Senior Software Engineer
Dubizzle Labs
- Revamped and launched a multi-tenant CRM supporting Dubizzle Cars transaction operations in Dubai, with back-end workflows designed for scalable tenant-specific operations.
- Designed and implemented a real-time analytics system using synchronous and asynchronous processing, dispatcher processes, router and proxy patterns, and message queueing for scalable back-end workloads.
- Optimized Elasticsearch infrastructure and query execution, achieving approximately 80% improvement in search performance while reducing infrastructure costs by approximately $800 a month.
- Engineered Elasticsearch autocomplete using n-grams, edge n-grams, and custom analyzers to improve search relevance and query matching.
- Optimized back-end queries, database access patterns, and execution paths to improve response times across targeted production workflows.
- Implemented in-memory and query-result caching strategies, improving back-end efficiency and response times by approximately 25 – 35% for targeted workloads.
- Improved production visibility through application metrics, centralized logging, dashboards, monitoring, and alerting across back-end services.
- Managed and mentored a team of four software engineers while conducting peer code reviews and supporting engineering quality standards.
Back-end Engineer
PakWheels.com
- Optimized database queries, indexing strategies, and back-end execution paths across high-traffic services, delivering response-time improvements of up to approximately 2x across targeted workflows.
- Contributed to migrating the primary database from MySQL 5.7 to MySQL 8, contributing approximately $3,000 a month in infrastructure and operational savings.
- Implemented infrastructure improvements that contributed approximately $1,000 per month in additional savings.
- Resolved critical issues across ad posting, featuring, and mobile verification workflows, contributing approximately $1.300 a month in operational savings.
- Implemented in-memory and query-result caching alongside background processing, improving efficiency and response times by approximately 40 – 70% for frequently accessed workflows.
- Upgraded the primary Ruby on Rails application from Rails 3.2 to Rails 4.2, improving maintainability and stability of the legacy back end.
- Architected Kibana dashboards and supported centralized logging and monitoring workflows to improve visibility into application behavior, performance bottlenecks, and production incidents.
- Managed two interns and two junior software engineers while participating in peer code reviews and supporting back-end quality standards.
Experience
Hostlify Hostel Management Platform
TelemetryFlow
Hermes — Self-learning AI QA Agent & Testing Platform
The system supports configurable AI models and browser automation through Chromium-based tooling. Its extensible skills architecture allows users to reuse, customize, or create QA skills for different projects and workflows.
A key capability is its persistent, self-improving skill system. Hermes can update its testing skills based on new requirements, commit those changes to a repository, and open pull requests for review. Persistent storage can also be configured for long-term memory and state, allowing the agent to retain its capabilities across redeployments rather than starting from scratch.
Education
Bachelor's Degree in Computer Science
University of the Punjab - Lahore, Pakistan
Skills
Libraries/APIs
REST APIs, Node.js, Sidekiq, ActiveRecord, React, WebRTC
Tools
AWS ELB, NGINX, Claude Code, FreeSWITCH, Claude, Kibana, Jenkins, Grafana, Codex, Logstash, ELK (Elastic Stack), Zabbix, n8n, Zapier, GitHub, Terraform
Languages
SQL, Python, Elixir, Ruby, JavaScript, HTML, CSS
Paradigms
Microservices, Role-based Access Control (RBAC), Design Patterns, Web Application Architecture, Real-time Systems, Event-driven Architecture, Model Context Protocol (MCP), Application Architecture, Test Automation
Platforms
Amazon Web Services (AWS), AWS IoT, Docker, New Relic, AWS Lambda
Storage
PostgreSQL, Databases, Elasticsearch, Redis, MySQL, Datadog, Memcached, Amazon S3 (AWS S3), PSQL, Cache
Frameworks
Phoenix, LangGraph
Other
Ruby on Rails, LLM Integrations, Agentic AI, Database Optimization, System Design, System Architecture, Performance Optimization, Back-end Development, Artificial Intelligence (AI), Back-end, Large Language Models (LLMs), Agentic AI Systems, AI Chatbots, AI Agents, AI Programming, OAuth, Programming, Security, Web Development, Performance, Privacy, APIs, Observability, API Integration, Full-stack Development, Architecture, Generative Artificial Intelligence (GenAI), Scalable Platforms, Distributed Systems, Speech-to-Text (STT), Text-to-Speech (TTS), Query Optimization, Database Indexing, Monitoring, Monitoring & Alerting, LLM Agents, ElevenLabs Solutions, Supabase, Full-stack, AI Integration, Workflow Automation & System Integration, OpenAI SDK, AI Agent Orchestration, AI Voice Agents, LiteLLM, WebSockets, ElevenLabs, AssemblyAI, OpenAI, Cursor AI, OpenClaw, Hermes, Cloudflare, Prometheus, Audio Processing, Infrastructure as Code (IaC), Webhooks, Collaboration, Load Balancers, Elastic APM, AWS ECS Fargate, Argo CD, CI/CD Pipelines, Cloud Telephony, AWS VPN, Ruby on Rails 8, Voice, RESTFul APIs, API Design, Data Modeling, Database Schema Design, Full-text Search, Optimization, Authentication, Scalable Architecture, Elixir Oban, GenServer, Software Architecture, Process Supervision, Fault-Tolerant Systems, Computer Science, Real-time Streaming, LLM Integration, API Testing, Servers
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring