Backend Developer - Remote

Hello! ✨ We’re Wildix, a global leader in Unified Communications & Collaboration as a Service (UCaaS) and we’re on a mission to redefine how businesses connect. Our secure, web-based and AI-powered solutions help companies around the world collaborate smarter, serve customers better and grow stronger — and we want you to help shape what’s next. About Us… In 2005, brothers Dimitri and Steve Osler set out to reimagine how businesses communicate, and that vision became Wildix. Today, from our headquarters in Tallinn, Estonia, Wildix is one of the world’s fastest-growing UCaaS companies, with 300+ team members from 15+ nationalities, working across Europe, the UK, the Americas and beyond. We serve businesses in 135+ countries through a partner-first ecosystem, delivering secure, intuitive solutions that keep companies connected, productive and ready for what’s next. At Wildix, we don’t just build technology, we live it. As a remote-first company, we rely on our own platform every day to collaborate globally and innovate fast. With steady growth and a strong foundation, we offer real opportunities to advance your career as we scale, making an impact in a global team that’s shaping the future of work. At Wildix, our mission is clear: Empower companies worldwide with seamless communication solutions that drive productivity, efficiency, and growth. About The Role: We are looking for a Backend Developer to join our Business Layer & Portal team. In this role, you will be a key contributor to our core business platform, managing critical integrations and services. This is a polyglot, AWS-heavy environment where your code will orchestrate workflows between Wildix cloud infrastructure and major business systems (SAP, Salesforce, Stripe, etc.). If you love serverless architectures, solving complex business logic, and working with both PHP and Go, you’ll fit right in. Are you up for the challenge? What You Will: Develop and support core application services: Build, test, and debug backend features. Integrate with enterprise platforms: Build and maintain secure integrations with Salesforce, SAP B1 Service Layer, payment processors (Stripe), and tax/VAT engines (SureTax). Work on Serverless AWS infrastructure: Develop and deploy serverless event-driven applications on AWS using AWS Lambda, API Gateway, SQS, Route53, and AppConfig. Optimize Performance & Security: Enhance API latency, build robust caching strategies with Redis/ElastiCache, and protect system integrity through secure token-based and scope-based authorization. Collaborate cross-functionally: Work closely with Customer Care, SAP, CRM, SRE, Sales, Marketing, CLASSOUND, and Accounting teams to build requested features and troubleshoot integration bottlenecks. Maintain documentation: Write and update API specifications and system design diagrams for seamless team collaboration. What You Will Bring: 2+ years of professional backend development experience, with solid proficiency in PHP 8.x and/or Go (Golang). Practical experience building applications on AWS (AWS Lambda, SQS, API Gateway) and utilizing Infrastructure as Code (AWS SAM). Strong SQL skills (MySQL, MSSQL / SQL Server) and a solid understanding of cache-first patterns (Redis, Memcached). Proven track record of designing, testing, and debugging third-party API integrations (CRM, payment gateways, ERP systems, external web services). Experience in writing clean, testable code with robust unit/integration testing (PHPUnit, Go testing). Upper-Intermediate English skills (B2+) for daily collaboration in our international team. Bonus Points If: Experience with Bref (PHP on AWS Lambda) and modern PHP API design (PHP-DI, FastRoute, Harmony/Laminas middleware). Direct experience with SAP B1 Service Layer, Salesforce REST API, or automated tax calculation services. Why You’ll Love It Here 👫 Work with a Supportive, High-Performing Team – We believe in trust, autonomy, and working with bright, passionate individuals who drive real impact. 🌍 A Truly International Workplace – Our diverse and inclusive team ensures you’ll always feel connected and supported, no matter where you are. 🚀 Shape the Future of Global Communication – Be part of a team transforming how businesses operate in an era of remote work and AI-powered collaboration. 💼 Join a Profitable & Stable Company – We’re not a startup experiment, we’re a two decade old success story with sustained profitability, meaning we can back your boldest ideas. What we offer 🏖️ Generous Time Off – Take the breaks you need to relax, recharge, and come back inspired. 💻 Top-Tier Tech – Love Mac? So do we! We equip our team with the best tools for success. 🚀 Career Growth & Development – Access to programs and events to keep you at the top of your game. 🌱 Well-being Support – We offer access to psychology sessions to support your mental and emotional health Happy with them? We offer even more! Our Benefits are country-specific, you can ask your recruiter for more information Interview Process 🤝 Step 1: Initial Screening – A chat with our Talent Team to understand your background, experience, and motivations (30 mins) 🛠️ Step 2: Final Tech Interview – A conversation with Team Lead and an SRE to ensure alignment with our values and mission (60 mins) We Are Wildix Wildix is an equal-opportunity employer. We value diversity and welcome all applicants regardless of race, gender, age, religion, or any other characteristic. Everyone is encouraged to apply and is welcome to join our Blue Ecosystem. Ready to join us? Apply Now!