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mahadizulfiker
about

Mahadi Zulfiker

Full-stack software engineer, Dhaka, Bangladesh, GMT+6.

Engineer who ships the whole thing

I’m Mahadi Zulfiker, a full-stack engineer with 3 years building production systems end-to-end: architecture, backend, interface, and deployment. Most of my work lives where things are hard to fake: realtime voice agents, wallet ledgers, multi-vendor marketplaces.

I like problems with a correctness cost, money that has to add up, a call that has to answer in Bangla under 300 ms, a score report that can’t silently fail. I’d rather write the stricter version that stays right than the quick one that drifts.

Comfortable owning a product solo, and comfortable being one of eight on a platform. I care about the details a reviewer actually notices, the empty state, the focus ring, the number that lines up.

Focus
Voice-AI · Commerce · Platforms
Now
Full-stack engineer @ SeloraX
Stack
Next.js · Node · PostgreSQL · RN
Based
Dhaka, Bangladesh (GMT+6)
Study
BSc CSE, Uttara University

Where I’ve worked

  1. Nov 2025 → PresentHybrid · Dhaka, Bangladesh

    Full-Stack Software Engineer

    SeloraX

    Building AI and commerce products end-to-end across the PERN/Next.js stack.

    • Built the SeloraX voice-AI call agent (realtime Bangla speech over SIP) and its self-serve platform: plans, prepaid billing, campaigns and a public API.
    • Primary author of the XCall AI assistant (~30k lines): an agent that runs calling campaigns from one chat, also served over MCP.
    • Sole author of Smart Sheba, a commerce and rewards platform with a ledger-backed wallet and rank engine.
    • Shipped SEO Studio and AI Marketing Studio; added the SEO/GEO layer and AI-consultation funnel on selorax.io.
    • Contributor to the core multi-tenant SaaS: backend, dashboard, and frontend.
    shipped thereand 7 more
  2. Jun 2025 → PresentRemote

    Full-Stack Engineer

    Talktivity

    Building a realtime voice-AI English tutor that scores spoken English and returns a CEFR report.

    • Core contributor across the React Native app, the Next.js web frontend (about a third of its code) and the Node backend (nearly 40% of commits).
    • Built the IELTS speaking and listening track end to end: mobile drills, web reports and the scoring APIs behind them.
    • Work across the realtime audio pipeline: LiveKit/WebRTC with Groq STT/LLM and Kokoro TTS.
    • Cut a 32% incomplete-score rate on AI reports to near zero by reworking the BullMQ scoring queue.
    shipped there
  3. Aug 2025 → Oct 2025Remote · Korea

    Full-Stack Engineer

    Anirix

    Built and optimized scalable full-stack features across backend services and UI.

    • Developed backend services and frontend improvements with modern frameworks.
    • Worked across a distributed, remote team.
    focus
    • Backend services
    • Frontend UI
    • Distributed remote team
  4. Jun 2025 → Jul 2025Dhaka, Bangladesh

    Frontend Engineer

    Softvence Agency

    Delivered responsive, client-ready interfaces with a focus on UI polish.

    • Built reusable component architecture and improved front-end performance.
    focus
    • Client-ready interfaces
    • Reusable components
    • Front-end performance
  5. Jan 2025 → Aug 2025Bangladesh

    Co-Founder & Full-Stack Engineer

    AMGoal

    Co-founded and built the product end-to-end.

    • Owned architecture, backend, frontend, and delivery.
    shipped there
before engineering
  • Data Annotator·Intelligent MachinesOct 2020 → Mar 2021
Education
  • BSc in Computer Science & Engineering (Honors)Ongoing
    Uttara University · 2024–2027
  • HSC & SSC
    Uttara High School & College · 2023

What I build with

Frontend
ReactNext.jsTypeScriptTailwind CSSReduxshadcn/uiReact Native
Backend
Node.jsExpressNestJSPythonRESTGraphQLPrisma
Data
PostgreSQLMongoDBMySQLRedis
Platform & DevOps
DockerVercelCI/CDAWS S3 / R2npm packagesGit
AI & Realtime
LiveKit / WebRTCGeminiGroqLLM integrationTTS/STT
Payments
StripeSSLCommerzAamarPayLemon SqueezyEPS

Straight answers

Who is Mahadi Zulfiker?

Mahadi Zulfiker is a full-stack software engineer based in Dhaka, Bangladesh, with 3 years building production systems end to end: realtime voice-AI agents, commerce platforms with wallet ledgers, and multi-vendor marketplaces.

Is Mahadi Zulfiker available for hire?

Yes. He is open to full-time software engineering roles and select freelance work, based in Dhaka (GMT+6) and working with remote teams. Email is the fastest way to reach him and he replies within a day.

Has Mahadi Zulfiker built voice AI that speaks Bangla?

Yes. He is the primary builder of SeloraX Voice AI, an AI phone agent that handles inbound and outbound calls over a SIP gateway, using Gemini Live for reasoning and a custom Bangla text-to-speech voice.

Can Mahadi Zulfiker work with remote teams outside Bangladesh?

Yes. He shipped remotely with Anirix, a Korea-based team, from August to October 2025, and works remotely with Talktivity on a realtime voice-AI English tutor. In 2025 he was offered a full-time remote full-stack role by London Maths & Science College in the UK, starting February 2026, which he declined to finish his degree.

Where did Mahadi Zulfiker study?

He is studying for a BSc in Computer Science and Engineering at Uttara University in Dhaka, from 2024 to 2027, alongside full-time engineering work.
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