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Adri KolajAK

Adri Kolaj

Senior Software Engineer / Team Lead

€610/day
Milan, IT
3-7 years

Average response time: 1 hour

About Adri

Senior Software Engineer and Team Lead with 5+ years of experience building and evolving production web platforms. I currently work directly with the CTO of my main client, leading the team through the transition from a legacy Symfony monolith to a modern Python-based platform, with focus on code quality, delivery standards, and measurable business impact.

What I deliver:
  • Backend development — Symfony, Laravel, CakePHP, Python. REST APIs, business logic, clean maintainable code.
  • Architectural decisions — I design how systems should evolve, including migrations from monolith to modular platforms. On cloud infrastructure I collaborate closely with DevOps specialists to translate architecture into AWS deployments.
  • Data modeling & migrations — production migrations from MySQL to MongoDB, schema redesign, legacy data consolidation.
  • AI integration — embedded LLM-based automation into client workflows, delivering a measurable 25% productivity gain.
  • Team leadership — code review, architectural guidelines, mentoring, raising the team's delivery standards.

How I work: I take ownership. I prefer engagements where I can think, decide, and deliver — not just execute tickets. I communicate clearly with both technical and non-technical stakeholders, ship in small verifiable increments, and flag risks early.

Availability: part-time from 2 days/week. Best fit for teams that need a senior backend engineer to lead a migration, drive architectural decisions, or add AI capabilities to existing systems.
  • Italian

    Native or bilingual

  • Albanian

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Wonderful Italy (Main Client) & Independent Projects
    Freelance Senior Software Engineer / Team Lead
    TRAVEL AND TOURISM
    June 2024 - Today (2 years and 2 months)
    Milan, Italy
    ▸ Leadership & Architecture: Acting as Team Lead at Wonderful Italy in close collaboration with the CTO, enforcing architectural guidelines, code quality, and delivery standards.
    ▸ Guiding the team through the core transition from a legacy PHP (Symfony) monolith to a modern Python based platform utilizing a Backend-for-Frontend (BFF) architecture.
    ▸ System Refactoring & Migration: Actively involved in large-scale migrations, including consolidating multiple independent internal apps into a unified system and transitioning from MySQL-centric data models to MongoDB.
    ▸ Cloud Infrastructure & Reliability: Managing and deploying cloud infrastructure on AWS, transitioning from EC2/ECS towards AWS Lambda. Played a key role in drastically improving platform stability, moving from unpredictable downtime to highly resilient, business-critical systems.
    ▸ Full-Stack Development & AI Integration: Delivering scalable backend solutions using PHP (Symfony, Laravel, CakePHP) and Python across the full software lifecycle for various clients. Led AI integration projects that automated business workflows, increasing client productivity by 25%.
    PHP Python Docker JavaScript Tech Lead
  • FatturaElettronica APP
    Software Engineer
    DIGITAL AND IT
    September 2023 - June 2024 (9 months)
    Milan, Italy
    ▸ Developed web app for an electronic invoicing system using CakePHP and JavaScript (jQuery).
    ▸ Implemented new features, performed maintenance, and resolved bugs to enhance the platform used by over 200,000 customers.
    ▸ Ensured the development of a user-friendly interface and optimal user experience.
    ▸ Contributed to the realization of a cloud-based platform for tracking, controlling, and optimizing invoicing processes.
    ▸ Developed data collection modules, enabling businesses to manage their electronic invoicing profiles.
    ▸ Implemented algorithms and calculators for processing invoicing data and ensuring compliance with legal requirements.
    ▸ Built tools to facilitate access to invoicing documentation and assess operational efficiency.
    ▸ Designed algorithms and data models to analyze invoicing data and convert it into performance indicators.
    ▸ Developed functionalities to measure and optimize invoicing processes and provide actionable insights.
    ▸ Worked closely with the Customer Care team to resolve bugs quickly and efficiently, providing technical assistance as needed.
    ▸ Ensured rapid resolution of issues to maintain high customer satisfaction and system reliability.
    ▸ Supported the Customer Care team by troubleshooting and addressing technical problems in a timely manner.
    JavaScript PHP SQL Git cakePHP
  • Sustainable Brand Platform
    Software Engineer
    ENVIRONMENTAL
    June 2022 - September 2023 (1 year and 3 months)
    Milan, Metropolitan City of Milan, Italy
    ▸ Realization of mid-high complexity web app with a focus on fashion sustainability.
    ▸ Development of GHG, EcoScoring and LCA algorithms, plus other features helping fashion brands and suppliers to understand their impact.
    ▸ Transition from a legacy PHP monolith to a modern Laravel-based + Vue.JS platform, with focus on code quality, delivery standards, and measurable business impact.
    JavaScript PHP Laravel Git VueJS

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Education

  • Master, Full Stack Web Development Boolean
    2021
    Master, Full Stack Web Development Boolean
  • Biotechnology
    Università degli Studi del Piemonte Orientale Biotechnology
    2018
    Biotechnology

Skill set

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