Available for selected freelance & remote backend projects

I build backend systems that stay reliable under production pressure.

Senior Backend Engineer with 11+ years of experience helping companies design, scale, and modernize APIs, SaaS platforms, search systems, and integrations — combining proven engineering discipline with AI-assisted development workflows.

Kamran LatifSenior Backend Engineer

About

Backend engineering, done properly.

I’m a Senior Backend Engineer with 11+ years of professional experience building and operating production systems for international clients and remote teams. My foundation is deep PHP and API engineering, extended over the years into search platforms, system integrations, automation, and the infrastructure that keeps all of it observable and reliable.

I currently work with one of Europe’s leading media licensing platforms — hundreds of millions of editorial and stock images and videos served to newsrooms, sports media, and brands worldwide — where my day-to-day spans backend APIs, Elasticsearch-powered search, authentication, CDN and caching behaviour, CI/CD pipelines, observability, and debugging real production incidents. Before and alongside that, I’ve delivered through platforms like Turing and Upwork — including a client relationship that has lasted more than five years.

What I enjoy most is the unglamorous part of backend work: finding why a system misbehaves under load, modernizing legacy code without breaking business-critical workflows, and leaving every codebase more maintainable than I found it. I combine that traditional engineering discipline with AI-assisted workflows — using tools like Claude for architecture planning, test generation, code review, and documentation — to deliver faster without lowering the bar on quality.

  • 11+ years backend engineering experience
  • Production systems at international scale
  • Remote-first, async-friendly collaboration
  • API-first development
  • Search and data-heavy platforms
  • AI-assisted engineering workflow

11+

Years of backend engineering experience

5+

Years with a single long-term client

24/7

Production systems supported & monitored

100%

Remote — international teams & clients

Expertise

Where I do my best work

The backend problem spaces I've spent 11+ years getting good at — in real production systems, not toy projects.

Backend Architecture

Designing backend systems that are clean to work in and predictable to operate — clear boundaries, sensible data models, and architecture that scales with the business instead of against it.

API Development & Integrations

REST APIs and third-party integrations built API-first: versioned, documented, tested with Postman/Newman, and resilient to the failure modes that only show up in production.

Search & Elasticsearch

Search experiences for data-heavy platforms — Elasticsearch index design, query tuning, relevance improvements, and the caching layers that keep search fast at scale.

Legacy System Modernization

Modernizing legacy PHP systems without breaking business-critical workflows — incremental refactoring, test coverage where it matters, and migration paths that ship in production, not just on slides.

Automation & CI/CD

GitLab CI/CD pipelines, automated API test suites, and deployment workflows that turn releases from a risk into a routine.

Production Debugging & Observability

Sentry, structured logging, and disciplined incident debugging — finding the real root cause of CDN, cache, auth, and performance issues, then fixing the class of problem rather than the symptom.

Skills

A stack built for backend work

Tools I use in production — not a list of everything I've ever opened a tutorial for.

Backend

PHPPythonREST APIsSlim FrameworkLaravelYii2CodeIgniterFastAPI

Databases & Search

MySQLPostgreSQLMSSQLElasticsearchRedis

DevOps & Tools

DockerGitLab CI/CDGitPostmanNewmanSentryLinuxWindows / IIS

Integrations

OAuth2Microsoft 365Gmail API / SMTP OAuth2Payment APIsThird-party APIsCDN & cache systems

AI Workflow

ClaudeAI-assisted codingPrompt engineering for developmentCode review assistanceTest generationArchitecture brainstormingDocumentation assistance

Featured Projects

Case studies from real production work

Generalized to respect client confidentiality — happy to go deeper on any of these in a call.

Enterprise Media Search & API Platform

Backend engineering for a large-scale international image/video platform: search APIs, Elasticsearch improvements, authentication, caching and CDN-related debugging, observability, and production incident handling.

  • Improved search API reliability and relevance on a high-traffic platform
  • Debugged and resolved production CDN, cache, and auth incidents
  • Strengthened observability so issues surface before customers notice
PHPElasticsearchRedisREST APIsGitLab CI/CDSentry

OAuth2 SMTP Integration Platform

Implemented Microsoft 365 and Gmail OAuth2 SMTP support for a multi-customer Yii2-based platform, replacing legacy password-based email sending with secure, modern authorization flows.

  • Customer-level SMTP configuration across a multi-tenant platform
  • Secure token-based email delivery aligned with Microsoft/Google deprecation of basic auth
  • Zero-disruption rollout for existing customers
PHPYii2OAuth2Microsoft 365Gmail APIMSSQL

Backend CI/CD Automation

Designed and improved GitLab CI/CD workflows for backend services — automated API testing with Postman/Newman, staging deployment pipelines, and release processes the whole team can trust.

  • Automated API regression testing on every pipeline run
  • Repeatable staging deployments instead of manual release steps
  • Higher release confidence and faster feedback for the team
GitLab CI/CDDockerPostmanNewmanBash

AI-Assisted SaaS Backend Workflows

Integrated AI tools like Claude into the day-to-day engineering workflow — architecture planning, implementation, test generation, debugging, and documentation — with senior engineering review keeping quality in control.

  • Faster prototyping and delivery without sacrificing code quality
  • Broader, earlier test coverage through AI-assisted test generation
  • Consistently better documentation alongside the code it describes
ClaudePHPPythonFastAPIPrompt engineering

Long-Term SaaS / Web Platform Development

5+ years as the backend engineer for a long-term international client’s web platform — feature development, maintenance, debugging, and continuous improvement across the full backend.

  • A working relationship that has lasted more than five years
  • Reliable delivery across hundreds of features and fixes
  • A platform kept stable, maintainable, and evolving with the business
PHPMySQLREST APIsLinux

Work Process

How I take a project from idea to production

A predictable process clients can plan around — no surprises, no black box.

  1. 01

    Understand the business requirements

    Before any code: what the system must do, who depends on it, and what “done” actually means for your business.

  2. 02

    Design clean backend architecture

    A clear plan for data, APIs, and boundaries — designed for the team that will maintain it, not just the demo.

  3. 03

    Build APIs and integrations

    Disciplined, reviewable implementation — API-first, with third-party integrations handled defensively.

  4. 04

    Add testing and observability

    Automated API tests, error tracking, and logging — so problems are caught in pipelines, not by your customers.

  5. 05

    Deploy and monitor

    CI/CD-driven deployments with monitoring from day one. Releases become routine, not events.

  6. 06

    Improve continuously

    Production feedback drives iteration: performance tuning, hardening, and steady modernization over time.

Services

What you can hire me for

Focused backend engagements — each one delivered with senior-level ownership from first call to production.

Backend API Development

REST APIs designed, built, documented, and tested for real-world production use — from first endpoint to versioned platform.

SaaS Backend Development

Multi-tenant SaaS backends: data modelling, authentication, billing-ready architecture, and the operational maturity SaaS demands.

PHP / Laravel / Slim / Yii2 Development

Senior-level PHP development across modern and established frameworks — new features, refactoring, or taking over an existing codebase.

Elasticsearch / Search Implementation

Search that actually finds things: index design, relevance tuning, performance optimization, and integration into your existing stack.

Legacy PHP Modernization

Incremental modernization of legacy PHP systems — safer code, better structure, and zero broken business workflows along the way.

Third-Party API Integrations

OAuth2, Microsoft 365, Gmail, payment providers, and other external APIs — integrated securely and built to survive their failure modes.

CI/CD & Backend Automation

GitLab pipelines, automated testing, and deployment automation that give your team faster, safer releases.

AI-Assisted MVP Development

Fast, pragmatic MVPs built with AI-assisted workflows and senior engineering judgment — speed without the usual prototype debt.

Testimonials

What clients say

Real feedback from real engagements — verified client reviews from Upwork.

Upwork
We hired Kamran over 5 years ago and he was a valued contributor to our project for all these years. Kamran is an outstanding developer who showed how to work in a team and who also challenged the tasks we gave him to make the result better. He works fast and accurate and adheres to the Yii best practices. We can really recommend Kamran if you need a senior developer with great skills and a keen mind. For us the project is finalised to great satisfaction so our engagement with Kamran comes to an end. We wish him all the best and thank him openly in this review.
RSRon StolwijkConligo Services BV · Netherlands
Upwork
Kamran's work on our Yii2 project was very good. He wrote well-organized code that was covered by thorough test cases. We would be happy to work with him again in the future.
HCHamza ChouaibiBlitz Brands · Australia
Upwork
Kamran is very well experienced in web development. He is able to understand client's needs and capable of solving complex issues. I highly recommend working with him if you are facing challenges on your website!
AAAnas AlyahyaAuto Studio · Jordan
Upwork
Great developer to work with! He consistently delivers high-quality work with professionalism and perfection. Each project was completed successfully, and I would certainly recommend his services. Well done — looking forward to working together on more projects!
APAlexandre Perevalo Poland

Contact

Need a reliable backend engineer for your next project?

Let’s build something stable, scalable, and production-ready. I’m selective with engagements so every project gets senior-level attention.

Available for selected freelance, contract, and remote backend opportunities.

kamranlatifarain@gmail.com

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