Senior Full-Stack Developer (Vanilla JavaScript / Vanilla PHP)

The Role:
We have been developing products for Wall Street for the last 13 years. We grow increasingly, and our products help attract more than $30 billion of financing monthly.
Our clients: J.P.Morgan, Goldman Sachs, Dell, Ford, Tesla, and others.
The head office is in NY. The development office in Kyiv has operated for the last 9 years and comprises 140+ specialists across 10 Agile, DevOps, and Architect teams.

We are looking for a Senior Full-Stack Developer. You will be a part of a motivated team responsible for implementing new functionality and maintaining mission-critical systems for one of our technology platforms (Swiftbridge, which underpins Evercall).
Since this role involves close collaboration with a team located in the USA, we are looking for a shifted working schedule until 7:00 PM (UA time, including a one-hour break). The mandatory time reference is 12:00 PM ET.

Key requirements:
● 7+ years of commercial software development experience
● 7+ years of professional experience with PHP (7.x/8.x), including OO design, SOLID principles, system design and architecture
● Strong experience with SQL, relational databases (MySQL/PostgreSQL), including query optimization, indexing strategies, and data modeling
● Strong knowledge of vanilla JavaScript
● Knowledge of front-end technologies (HTML, CSS, DOM API)
● Solid understanding of Linux CLI, Docker images and containerization
● Understanding of Apache configuration, performance tuning, and security best practices
● Experience with API design and web services development
● Experience integrating and maintaining third-party APIs and services
● Strong debugging, profiling, and optimization skills across the LAMP stack
● Analytical and troubleshooting skills
● Proactiveness, ability to learn quick
● High level of responsibility and ability to work independently
● Strong communication and time management skills
● English level: Upper-Intermediate.

Would be a plus:
● Experience in leading projects
● Experience with high-load systems and performance optimization
● Experience with modern PHP frameworks such as Laravel or Symfony
● Knowledge of WebRTC and WebSockets
● Experience with: Kubernetes, Redis/Memcached, and cloud platforms such as AWS
● Knowledge of React, React SSR, React Context API, and state management patterns and solutions
● Experience with TypeScript
● Familiarity with CI/CD pipelines and automated deployment practices
● Experience with automated testing frameworks for PHP (PHPUnit, Codeception)
● Familiarity with security hardening and compliance in enterprise environments
● Working hours skewed later (Kyiv time).

Key responsibilities:
● Design, develop, and maintain scalable, high-performance LAMP applications
● Take ownership of major features and drive optimization/refactoring projects targeting performance, scalability, and reliability improvements
● Collaborate with architects and product teams to design technical solutions that meet business requirements
● Write clean, maintainable, and well-documented code following best practices
● Optimize SQL queries and ensure efficient interaction with large datasets
● Participate in code reviews, architecture discussions, and knowledge sharing
● Research and evaluate new technologies, frameworks, and approaches to improve development efficiency and product capabilities
● Provide production support and troubleshoot complex system issues
● Write and maintain unit and integration tests.

We offer besides a competitive salary:
● The friendly team
● Remote work, with the ability to return to the Kyiv office when it’ll be possible
Office in the city center — business center Panorama near the Landscape Alley, 10 minutes from Zoloti vorota metro station
● The informal style of leadership and communication, skilled management
● Work in an Agile environment
● Participation in seminars, trainings, and conferences
● English lessons online and the possibility to use English at work
● Team building and other activities
● Yearly salary review
● Paid vacation, paid sick leave
● Corporate medical insurance programs from the start date
● PE accounting and support
● Referral program.