Lead / Principal Full Stack Software Engineer (PHP)

ABOUT THE COMPANY:Join ADDENDUM, a global software development and IT team augmentation firm focusing on fintech, banking, and telco industries. Experience tailored benefits, diverse projects with various tech stacks, and opportunities for growth, freedom, and responsibility you desire.ABOUT THE ROLE:Whether you're based in Vilnius or Riga (or working remotely), you'll join our distributed team driving the development of key web applications within the insurance technology domain.As a Lead / Principal Full Stack Software Engineer (PHP), you'll take a hands-on leadership role guiding technical direction, ensuring code quality, and mentoring team members. You'll help shape architecture, integrations, and best practices across both back-end and front-end areas, working closely with analysts, QA automation engineers, and business stakeholders.WHAT YOU WILL BE DOING:Lead the design, development and enhancement of full‐stack web applications using PHP for backend and JS/HTML/CSS for frontend.Oversee the full stack back-end and front-end ensuring performance, scalability, and maintainability.Set technical standards, conduct reviews, and guide developers in following best practices.Collaborate with analysts and product teams to translate business needs into robust technical solutions.Support system integrations through REST APIs and coordinate with other systems and vendors.Promote automation, testing, and CI/CD improvements across the development lifecycle.Contribute to architectural decisions and long-term technical planning.WHAT WE EXPECT:Must-haves:6+ years of full-stack web development experience using PHP.Strong command of OOP, MVC, and system integration concepts.Deep understanding of both back-end (PHP, REST APIs) and front-end (JavaScript, HTML, CSS) technologies.Experience with frameworks such as CodeIgniter, CakePHP, or Symfony.Familiarity with Vue.js or jQuery for front-end development.Solid experience with Git, Postman, and SQL.Proven ability to lead, mentor, and guide technical teams.Excellent communication skills and ability to collaborate across technical and business domains.Nice-to-haves:Experience with accessibility standards and adapting web applications for users with diverse needs would be a huge plus.Experience with architecture design, performance optimization, or microservices.Understanding of CI/CD, cloud deployment, and DevOps practices.Experience working in regulated environments (e.g., insurance, finance).Strong problem-solving mindset and ownership of deliverables.WHAT WE OFFER:Salary ranges (for employees in Lithuania only): 3500 - 5800 gross (the given range is flexible and depends on your experience).At Addendum we believe in personalized benefits packages that cater to your unique passions. Tell us what drives you, and we'll craft a package accordingly. On top of that, heres whats in store automatically:Top Talent Collaboration: Join award-winning teams from different countries.Diverse, Challenging Projects: Break free from the ordinary with dynamic, stimulating work.Epic Team Events: Join us for summer and winter parties and online events.Learning & Development Opportunities: That new tech certificate is just around the corner.Special Celebrations: We love a good shindig for birthdays and project milestones.So, get your dancing shoes on and come join the funAt ADDENDUM, we wholeheartedly reject all forms of discrimination, including but not limited to age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, marriage, civil partnership, or any other protected category. We are committed to fostering a culture of equality and inclusion, where every individual has the opportunity to thrive.