Erdeniz TunçProduct Engineer
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I help startups build the right product and take it to market.

I talk to customers, define what to build, create working prototypes, lead development, and stay involved through launch and go-to-market.

See my work →
Erdeniz Tunç

I designed Optifeed's product development model from scratch. Idea to build dropped from over 1 month to 1 week. See how →

Startups where I was the first product hire

Featured project

Designing and Shipping a Feature End-to-End

  • 01
    Built the working prototype

    Owned the product direction and built the interactive flow myself, with Claude Code and Codex.

  • 02
    Tested it before engineering time

    Refined the flow through two internal stakeholder feedback sessions.

  • 03
    Handed it to engineering

    Solution spec delivered from the working prototype. The first build is in development.

Read the full case study →
Optivideo prototype product selection screen
optivideo.vercel.app (live, working)

Selected work

Product process

Designing How a Company Builds Products, From Scratch

Designed a process that catches the wrong idea before engineering builds it, not during.Build

Turning Manual Lead Research into a Working Tool

Built an internal lead-research tool that turns campaign criteria into a saved list of target companies.Discovery

Making a Technical Product Easier to Explain

Turned customer interviews into clear user groups, pain points, messaging, and landing page direction for a technical B2B product.Go-to-market

Shaping Positioning for a Pre-Launch Product

Shaped a pre-launch waitlist page for Tedaarik around clear positioning, benefits, and one focused user action.
Explore all work →

My role in the product development lifecycle

  1. 01

    Discovery

    Problem, users, business context

  2. 02

    Define & Validate

    MVP, flows, prototype, feedback, iteration

  3. 03

    Engineering Handoff

    Spec + prototype, build begins

  4. 04

    Development Management

    Backlog, sprint decisions, scope clarity

  5. 05

    Launch & Growth

    GTM, rollout, retention, growth loops

  6. 06

    Learn

    Metrics, signals, next solutions

Learn → back to Discovery

My first 30 days with a product

  1. 01

    What is working, what is unclear, and where customers are getting stuck

  2. 02

    One problem worth focusing on, instead of competing ideas and requests

  3. 03

    An evidence-backed first move, including deciding not to build yet

Work with me →
See what I bring to a company in practice →