Ilia Dereviashkin
At Kameleoon, I help turn ambitious product requirements into customer-facing experiences - from expanding Feature Flags into a broader experimentation platform to taking an AI-assisted experiment builder from MVP to production.
Kameleoon
Helped take an AI-assisted A/B experiment builder from MVP to production. The product became a major strategic direction for Kameleoon, was adopted by existing customers, helped attract new customers, and reduced the time required to create experiments.
Business impact & ownership
As the sole frontend engineer during the MVP, I owned the product-facing frontend delivery for prompt-based variation creation, human-in-the-loop questions, preview, compare, and manual editing - turning product requirements into one cohesive customer workflow.
Today, I continue to make most product-facing frontend design decisions in a three-person frontend team, collaborating with a frontend-oriented tech lead, backend engineers, and product management.
Customer workflow
Designed the core interaction model so users can move from an idea to a reviewable variation without leaving the builder.
Designed state and data boundaries across multiple services so conversation history, experiment data, generated code, and UI state stay consistent as the workflow evolves.
Introduced structured human-message content that later supported richer HITL interactions without redesigning the conversation-storage service.
Used generated API contracts and runtime validation to make service boundaries explicit and reduce integration risk as more product capabilities were added.
Kameleoon
Joined when the product was primarily a feature kill switch and contributed as it expanded into a broader feature-management and experimentation platform, supporting more advanced rollout, targeting, measurement, and experimentation workflows.
Product expansion
Feature Flags
├─ Variations & variables
├─ Audience targeting
├─ Scheduling
├─ Goals & experimentation
├─ Results
└─ IntegrationsMy focus was keeping the customer experience stable and predictable while the product scope kept growing. The editor had to absorb new capabilities without becoming fragile or difficult to evolve.
As my responsibility grew, I became independent in frontend technical decisions and eventually operated as the sole frontend engineer for a period, covering feature delivery, maintenance, reported issues, and GraphQL API contract discussions.
Joined as a junior while Feature Flags was still primarily a kill-switch product.
Delivered frontend work as targeting, scheduling, experimentation, results, and other customer workflows were added.
For a period, independently covered the frontend side of the product and its ongoing delivery.
After another frontend engineer joined Feature Flags, moved to AI Builder as its sole frontend engineer for the MVP.
Persist the source of truth. Store only the state required to reproduce the interface.
Avoid duplicated representations of the same information. Derive them from authoritative state whenever possible.
Strong types inside the application. Generated contracts and runtime validation at system boundaries.
Small structural changes are cheaper while the system is still understandable.
Create room for demonstrated directions of change without generalizing for hypothetical requirements.
July 2021 — Present
Middle Frontend Developer
Over 5+ years at Kameleoon, I progressed from junior contribution to independent frontend ownership across two customer-facing products. I supported the expansion of Feature Flags into a broader experimentation platform, then joined AI Builder as the sole frontend engineer for the MVP and helped take it to production.
Joined while the product was primarily a feature kill switch.
Delivered frontend work as the product added variations, targeting, scheduling, experimentation, results, and integrations.
Independently covered frontend technical decisions, delivery, maintenance, and reported issues for a period.
Joined the new product as sole frontend engineer during the MVP and helped take it from MVP to production.
Continue to own most product-facing frontend design as the AI Builder team and product scope grow.
Core
React · TypeScript · GraphQL · OpenAPI · Zod
Libraries & tooling
Redux Toolkit · Zustand · TanStack Query · React Router · Vite · Vitest · Playwright · Storybook
Remote frontend opportunities
I’m open to remote frontend engineering opportunities where product impact, ownership, and execution quality matter.
dereviashkinilia@gmail.com