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Haffi Mazhar

Senior Software Engineer@ Oxa

Backend and real-time engineer with 7+ years across WebRTC, FastAPI and cloud infrastructure. Right now I'm building low-latency teleoperation for autonomous vehicles.

01About

Software engineer with 7+ years in backend development and real-time systems. I build FastAPI services and cloud infrastructure, tune Python services for performance, and test reliability at very high scale. Currently building low-latency teleoperation for autonomous vehicles at Oxa, and previously founding engineer on a consumer sports platform.

2018 – 2019

University of Leeds

MSc Engineering, Technology and Business Management

2015 – 2018

University of Nottingham

BEng Mechanical Engineering

02Impact

Numbers I've been accountable for.

  • <200ms

    Live video latency

    Fleet-wide AV teleoperation over an optimised WebRTC pipeline.

  • <50ms

    Control messaging

    Bidirectional operator-to-vehicle messaging across fibre, 4G and Starlink.

  • 15M

    Concurrent users

    Performance and chaos testing for Sky's identity platform.

  • 10,000s

    Vouchers issued

    ASOS digital loyalty launch at Bink.

03Experience

Seven years of systems that can't be slow.

  1. Sep 2024Present

    Oxford, UK

    Oxa

    Senior Software Engineer, Autonomous Vehicles Remote Assist

    • Architected and built multi-client video streaming and remote control with WebRTC, enabling fleet-wide teleoperation across regions and AV platforms.
    • Achieved sub-200ms video latency and under 50ms bidirectional messaging latency using WebRTC (H.264/VP9 over UDP) across fibre, 4G and Starlink.
    • Deployed a real-time WebSocket service on GCP Cloud Run with FastAPI, Redis and Cloud SQL, scaling to concurrent vehicle/operator sessions with strong connection reliability.
    • Provisioned GCP Cloud SQL, Redis and Pub/Sub infrastructure with Terraform.
    • WebRTC
    • FastAPI
    • Redis
    • GCP
    • Terraform
  2. 20242026

    Boston, UK

    EggMonkey

    Founding Engineer (part-time venture)

    • Took a consumer sports platform from concept to production, generating £20k total revenue and £1.3k MRR, owning product discovery, architecture and delivery.
    • Partnered directly with the CEO to turn customer needs into scoped features and a pragmatic roadmap; recruited and managed UI/UX and customer-service hires.
    • Built the full-stack platform from scratch with Next.js, React, TypeScript, Node.js and PostgreSQL: auth, onboarding, player profiles, fixture booking and matchmaking, subscriptions, football video highlights and an operations admin portal.
    • Architected the cloud infrastructure, including Stripe payments and subscriptions, Mux video streaming, S3, SES notifications, Vercel hosting and DNS.
    • Next.js
    • TypeScript
    • PostgreSQL
    • Stripe
    • Mux
  3. Oct 2023Aug 2024

    London, UK

    Move.ai

    Backend Python Developer

    • Shipped multi-tenant SaaS services using FastAPI on AWS Lambda, integrating DynamoDB, Stripe and Auth0.
    • Added Datadog performance dashboards and standardised CI/CD in GitHub Actions for more reliable, visible deploys.
    • FastAPI
    • AWS Lambda
    • DynamoDB
    • Stripe
    • Datadog
  4. Jan 2022Oct 2023

    Ascot, UK

    Bink

    Backend Python Developer

    • Delivered retailer APIs with FastAPI/Django, Postgres, Redis and RabbitMQ for digital loyalty; supported the ASOS launch issuing tens of thousands of vouchers.
    • Django
    • FastAPI
    • Postgres
    • RabbitMQ
    • Redis
  5. Nov 2019Dec 2021

    Leeds, UK

    Sky

    Software Engineer, Performance

    • Optimised Sky Identity to handle spikes of ~10 million concurrent users through scaling, resource tuning and load balancing.
    • Introduced chaos and failover testing for APIs serving ~15 million concurrent users.
    • Load testing
    • Chaos testing
    • Kubernetes

04Toolbox

What I reach for every day.

Languages04

  • Python
  • Go
  • C++
  • TypeScript

Real-time systems04

  • WebRTC
  • WebSockets
  • gRPC
  • FastAPI

Reliability & performance04

  • Latency reduction
  • Load testing
  • Chaos/failover testing
  • Horizontal scaling

Cloud & infrastructure11

  • GCP
  • AWS Lambda
  • Kubernetes
  • Terraform
  • IAM
  • PostgreSQL
  • DynamoDB
  • Redis
  • RabbitMQ
  • Grafana
  • Prometheus

05Side projects

Things I've built for fun.

06Writing

Notes from what I'm learning.