PHP Developer with DDD

Ali Aydi

Schweiz

Remote

CHF 120,000 - 180,000

Full time

27 hours ago

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Benefits offered by this job

Fully remote work

Flexible hours CET

PTO 19 days

Conference participation

Job summary

WhiteTech, a remote-first fintech software company, is seeking a Senior PHP Developer to build, test, and support robust backend services. You will refine APIs, integrate third-party solutions, and ensure scalable systems using Symfony, CQRS, DDD, and microservices.

You’ll work with a distributed team across CET-friendly time zones, enjoying fully remote work and opportunities to contribute to cutting-edge fintech projects.

Qualifications

Proficient in PHP backend development with a focus on scalable software.
Strong OOP and design pattern knowledge.
Experience with Symfony and RESTful API design.
Database design and query optimization (PostgreSQL).
Familiarity with CQRS, DDD, and microservices architectures.
Expertise in test automation (PHPUnit, Behat, Codeception).
DevOps basics: Docker, Kubernetes, CI/CD pipelines.

Responsibilities

Design, develop, test, document, release and support software from scratch.
Enhance and refine API and backend systems.
Integrate third-party payment solutions and services.
Write tests and set up testing environments for new features.
Fix bugs and debug applications in production.
Produce technical documentation.
Provide production support for deployed software.
Collaborate with frontend and other teams for efficient delivery.
Showcase curiosity for innovation and unconventional solutions.

Skills

PHP best practices

OOP

Symfony

RESTful APIs

PostgreSQL

SQL optimization

DDD concepts

CQRS patterns

Microservices

Test automation

Event Sourcing

Kubernetes

Tools

Docker

Kubernetes

Doctrine ORM

Jenkins

Behat

PHPUnit

Codeception

Job description

At WhiteTech, we empower businesses in the financial ecosystem with cutting‑edge white‑label and SAAS solutions.

Our comprehensive suite of tools is tailored for EMI, PSP, e-commerce, and open banking platforms. With WhiteTech, clients gain access to a platform designed for flexibility, scalability, and seamless integration.

Our mission is to help businesses unlock their full potential in a rapidly evolving financial landscape.

Whether scaling your PSP, enhancing your EMI services, or diving into open banking, WhiteTech is your partner for innovation and growth.

We are a remote-first technology company and welcome applications from candidates across Europe, including the EEA, the UK, Switzerland, and other non-EEA European countries such as Ukraine, Moldova, Georgia, Armenia, Montenegro, Turkey, and the Western Balkans. We also consider applicants from different locations who can work within Central European Time (CET).

Your role and impact:

In your role at WhiteTech, you'll be at the heart of our mission to revolutionize payments worldwide. Your expertise will be critical in analysing data, processes, and code to identify, resolve or prevent issues and drive product improvements. You will contribute to developing a secure, well‑tested and high‑performing product, setting new standards in the fintech industry.

Your key responsibilities will include:

Designing, developing, testing, documenting, releasing and supporting software from scratch.
Enhancing and refining our existing API and backend systems.
Integrating third‑party solutions to broaden our payment ecosystem (acquirer, gateway, alternative payment methods, token platforms, systems for verification/scoring/monitoring of customer operations, reporting, etc.).
Running tests to make sure everything works as it should and setting up a testing environment for checking new features.
Fixing existing bugs and debugging the developed software.
Preparing necessary technical documentation.
Provide support for the implemented software in production
Collaborating with the front‑end developers and other team members to complete all of the above tasks in the most efficient way.
This role is about improving our products and solving problems, so we're looking for someone with excellent troubleshooting skills, curiosity for innovations and unconventional solutions.

What makes you stand out:

Understanding of best practices for optimizing code and web products in PHP, working with caching, asynchrony. Knowledge of best practices for developing and supporting large‑scale projects.
Understanding of OOP
Deep understanding of Symfony. Proficient in designing and implementing RESTful APIs using Symfony. Proficient in Doctrine ORM.
Relational Database Management (PostgreSQL). Proficiency in optimizing complex SQL queries for performance using techniques such as query rewriting, indexing strategies, and query execution plans.
Proficient in designing database schemas, including normalization techniques, entity‑relationship modeling, and schema design best practices.
Understanding the inner workings of Kubernetes, Docker and its components such as Docker Engine, Docker Hub, Docker Swarm.
SOLID, GRASP understanding. Deep understanding of a broad range of design patterns, including their motivations, structures, and implementations.
Knowledge of advanced DDD concepts such as Domain Events, Domain Services, Bounded Contexts. Ability to design a domain model for complex business problems and use it to solve real problems. Understanding the importance of application context and developing Bounded Contexts to separate domain models.
Understanding of CQRS principles and benefits, including asynchronous command processing, data synchronization between read and write models. Experience using design patterns and architectural patterns to implement an effective CQRS‑based architecture.
Knowledge of professional architecture design practices. Experience designing and developing complex, large systems using architectural templates and patterns. Ability to define and document architectural solutions and solve problems related to system complexity and scalability.
Advanced knowledge of PHP integration test automation tools and libraries such as PHPUnit, Codeception, Behat. Ability to design and structure integration tests for large and complex systems with a large number of interacting components. Knowledge of the process of setting up test environments and managing dependencies for effective integration tests.
Advanced knowledge of the process of development and deployment of systems built on the basis of Event Sourcing. Ability to design the architecture of the application using Event Sourcing, taking into account the requirements for the required capacity and scalability.
Advanced knowledge of microservices design and deployment processes, including configuration management, monitoring, and logging.
Advanced knowledge of Jenkins functionality, including advanced configuration capabilities such as parameterization, plugins, additional tools.

Our recruitment process typically follows these stages:

Application screening
Interview Stages (2‑3 weeks):
- Prescreening call (40 min)
- Technical Interview (60 min)
- Final Interview (40 min)
Job Offer

We offer:

Competitive compensation package (commensurate with your experience)
19 business days of flexible Paid Time Off (PTO)
Fully remote work with flexible hours (within the CET time zone) from any location of your choice
Values‑driven culture with a friendly and supportive work environment
Opportunity to regularly participate in conferences and community events as both a participant and contributor
Matrix organizational structure designed to streamline communication, remove barriers, and promote efficiency

Embrace the opportunity to develop your skills in a cutting‑edge fintech environment.

Let’s build something great together!

Originally posted on Himalayas

CI/CD & DevOps Communication Docker/Kubernetes E-commerce PHP Recrutement SQL Symfony Tests logiciels / QA