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BENCH+ PROFILE

Denis

Backend Engineer
PHP/Symfony backend engineering for high-load product platforms with AI-enabled search, metered billing, experimentation, and release-stability work

Senior backend engineer with deep PHP/Symfony production experience, strong platform reliability background, and recent hands-on work integrating AI-enabled product capabilities into backend systems.

BEST-FIT USE CASE

Backend-heavy product platform work involving Symfony services, high-load workflows, monetization or experimentation infrastructure, semantic search integration, release stabilization, and production-safe migrations.

Not the primary fit: Roles centered primarily on model training, frontend ownership, mobile app implementation, product management, or infrastructure-only platform operations.

EVIDENCE HIGHLIGHTS

What supports the assessment

01

Implemented backend customer-activation flows and AI-feature monetization mechanics for a business software platform.

02

Built a semantic recommendation flow where free-form user tasks are matched to ranked items with rationale.

03

Implemented an offline LLM evaluation pipeline using judge-style evaluation to support safer prompt and model iteration before release.

04

Led backend work on a pricing experimentation platform used across a large mobile application portfolio.

05

Introduced automated testing, CI, staging, and release checklists to stabilize backend delivery for a mobile product.

06

Built a reporting system for health-related recommendations and optimized a conversion-critical page.

07

Replaced forum search with a Sphinx-based engine and tuned backend behavior for peak activity.

WORKING STYLE

How they show up

  • Explains technical refactoring topics in English at B2 level.
  • Approaches stack selection through total cost of ownership, team availability, scale, lifecycle, infrastructure limits, and maintainability.
  • Describes task planning as a business case translated into technical implementation, estimate validation, iterative correction, and progress control.
  • Uses tests, staging, CI, and pre-release checks as practical delivery controls.