DJ

Backend developer and system architect, ELT and EdTech

Deniz Jamalzadeh

I build reliable, scalable infrastructure for English language training. My focus is clean architecture, secure multi-tenant systems, and software that stays dependable under real workload.

Open to connections in ELT, EdTech, and software
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Deniz Jamalzadeh

About

I lead development on ELTica, an end-to-end SaaS platform for CELTA, DELTA, TEFL, and related teacher-training programmes. It handles the full application lifecycle, from pre-application tasks and interview scheduling through to certificate issuance, for training centres and their trainees.

My day-to-day covers API design, data modelling, background job pipelines, real-time messaging, and role-based access across a multi-tenant architecture. I care about systems that are correct under load, easy to reason about, and that make centres more operationally efficient.

I also take on ELT-adjacent projects: custom platforms, integrations, and tools for centres and publishers that need software shaped around how they actually work.

I go by Deniz in Turkish settings and Sahand in Persian. Same person, one practice.

What I do

Projects

ELTica, live

eltica.org, demo at dev.eltica.org

A multi-tenant SaaS platform for English language teacher-training operations. It covers the full programme lifecycle for CELTA, DELTA, TEFL, and TESOL, from application and pre-interview tasks through interview scheduling, document management, payments, and certificate issuance. Training centres get one coherent system in place of a patchwork of tools.

Currently serving ITI Istanbul, with a second centre onboarding.

Live product Private codebase Productioneltica.org Demodev.eltica.org

For demo credentials or access questions: sahand@eltica.org

ELTica homepage preview Homepage ELTica courses area preview Courses

Online English level assessment

A focused placement assessment flow for learners and partner schools. Designed for centres that need reliable level placement before enrolment, without a separate testing platform.

Stack

  • Frontend

    Next.js, React, TypeScript, Tailwind CSS

  • Backend

    Node.js, Express, Prisma ORM

  • Databases

    MySQL, Redis, MongoDB

Contact

Email is the fastest channel, whether you need demo access, have product questions, or want to talk through a project.

If you are building something in ELT, training operations, or custom platforms, I am glad to explore whether we are a fit.