Senior Full-Stack Engineer

About Us: 5Blue Software is an Israeli-Ukrainian software development company specializing in custom software development, staff augmentation, dedicated engineering teams, AI solutions, and CTO-as-a-Service. We help startups and mid-sized companies scale faster with vetted engineering talent across Europe. About the project: Our client is enabling a world where everyone and everything can be intelligently connected. As the world's leading wireless technology innovator, our client continues to push the boundaries of what's possible across devices and networks to enable next-generation experiences and drive digital transformation. Our client delivers breakthroughs in 5G, Wi-Fi and AI. But that's just the beginning. As a Software Engineer for our client's Edgewise platform, you will join a cutting-edge AI-native development group building cloud-edge software, automation, and optimization applications that help the world's tier-1 cellular network operators improve network performance at scale. Responsibilities: — Work with a group of talented engineers providing innovative solutions to Cellular Networks problems. — Design and implement complex algorithms. — Develop and maintain high-performance, scalable, and reliable software systems. — Collaborate with cross-functional teams to identify and solve complex software problems. — Have end-to-end ownership: design, build, test, ship, and maintain full-stack solutions for large-scale products. — Leverage modern development pipelines, CI/CD, testing, and code quality practices to deliver high-impact solutions. — Work in an AI-native engineering environment that uses modern coding agents and spec-driven development to accelerate high-quality delivery. Requirements: 7+ years of experience as a full-stack developer (5+ years on the backend and 3+ years on frontend are also suitable) Stable long-term involvement in projects for 2+ years. Strong communication and interpersonal skills. Fluent English . Fluent in server-side technologies and architecture ( Java / Kotlin ). Expert in the latest JavaScript technologies (Vue.js / React ). Proficient in Microservices and Spring Boot . Strong understanding of HTML5, CSS3, and responsive, cross-browser development. Experience integrating frontend applications with REST or GraphQL APIs. Experience with Git and modern CI/CD workflows. Experience with building large-scale platforms . Experience with SQL (MySQL, Postgres) and/or NoSQL (Vertica) DB types. Experience with cloud development and deployment (AWS, GCP or Azure). Hands-on experience using AI coding tools such as Codex, Claude Code, Copilot, or similar agents as part of the software development lifecycle. Self-driven, independent, and a strong team player. B.Sc . in Computer Science or Software Engineering. Good to have: Excellent problem-solving skills. Experience working with big data applications using advanced SQL capabilities. Familiar with Clean Code, SOLID and high software engineering practices. Experience working with Vertica or other column-oriented databases. Experience with Linux and Kubernetes. Experience with Spec-Driven Development (SDD) and AI coding agents is a strong advantage. What we offer: — Flexible Work Environment: Opportunity to work remotely. — 1:1 English Classes : Individual English language training to enhance your communication skills. — Premium Medical Insurance : Comprehensive health insurance to ensure your well-being. — Great Team: Work with a supportive, collaborative, and dynamic international team. — Equipment Provided : All necessary equipment supplied for efficient job performance. — Accounting Support: Full accounting assistance in Ukraine and Poland. — Paid Time Off: 18 days of Annual Vacation and 7 days of Sick Leave without a doctor's note. — Flexible payment system , which allows you to withdraw funds in one click and has about twenty withdrawal options.