Back-end Developer & Product Engineer · Glasgow / Berlin / Remote

Back-end Developer & Product engineer

I’m Martin Sarsini — a freelance back-end web developer and product engineer based between Berlin and Glasgow, working remotely worldwide. I design, architect and build robust web apps in PHP & Symfony, with Clean Code at the core of everything I ship.

Back-end with PHP & Symfony

I build robust, customisable web applications in PHP and Symfony — architecting complex systems that solve real-world problems. Comfortable across MySQL, MariaDB and PostgreSQL, using Doctrine ORM to keep the data layer clean.

Over 20 years with PHP, from version 4.3 to today. The advantage of the PHP & Symfony stack is cost-effective build and deploy — backed by a vast, active community for solving problems fast.

20+ Years with PHP
Symfony Framework of choice
Clean Code In everything I ship

Engineering, not just websites

Great software is more than technical skill. I write Clean Code so teams can read, maintain and extend it — and lean on strong communication and teamwork to genuinely meet a client’s needs.

I’m a software engineer, not only a website builder: serverless processes, migration scripts and CLI tools, plus custom web apps — payment systems, chatbots, survey builders and booking systems, tailored to your brand.

Plan · Sprint · Ship · Repeat TDD & Agile — PHPUnit · Git · Ansible · CI/CD · RabbitMQ

Full spectrum

Back-end is my craft — but I bring a full-stack perspective. A quick look at the rest of what I do.

Architecture & systems design

Domain modelling, service boundaries and security by design — decisions that keep an application maintainable as it grows.

Architecture Domain modelling Security

Business analysis & product

Translating business requirements into solutions that raise software quality. I sit between stakeholders and developers — shaping project plans and owning QA so the final product truly fits its users.

Requirements QA Product

Front-end & UX

App-like experiences on the web with PWAs — Turbo, Stimulus and Vue.js, no app store required. Backed by real UX process: research, wireframing, prototyping and information architecture.

PWA Turbo Vue UX

See what I’ve built

Available for back-end and full-stack work with businesses of all sizes — cost-efficient, high-quality delivery with a personal touch, start to finish. Berlin · Glasgow · Remote worldwide.

Tools I work with

PHP Symfony Yii Framework Node.js MySQL PostgreSQL Doctrine ORM WordPress Docker Ansible AWS RabbitMQ Amazon MQ PHPUnit Data Structures & Algorithms APIs — Stripe, PayPal, YouTube