Senior Java Developer (AI-Native)

Stack

Responsibilities

• ▹Design system and service architecture for high-performance, scalable and reliable software, with a solid understanding of the surrounding infrastructure
• ▹Translate complex and often ambiguous requirements into clear, robust and scalable technical designs
• ▹Own the end-to-end delivery of complex features and modules, from design through implementation and production
• ▹Work in an AI-native engineering environment: leverage modern coding agents and spec-driven development, and adapt or create solutions using AI tools
• ▹Design and implement complex algorithms
• ▹Provide technical leadership: influence technical decisions, mentor peers and raise the engineering bar
• ▹Collaborate with cross-functional teams to identify and solve complex software problems
• ▹Continuously explore, evaluate and introduce new technologies, tools and engineering practices

Requirements

• ▹B.Sc. in Computer Science, Software Engineering or a related field
• ▹6+ years of experience in software development with Java
• ▹Strong system architecture and design skills: proven experience designing scalable, distributed systems and understanding the underlying infrastructure
• ▹Demonstrated ability to turn complex requirements into well-structured, scalable technical designs
• ▹Strong experience designing and implementing complex algorithms and software architectures
• ▹Experience with microservices architecture
• ▹Experience developing large-scale data applications and advanced SQL querying
• ▹Hands-on experience using AI coding tools (e.g. Codex, Claude Code, GitHub Copilot or similar) as an integral part of the software development lifecycle, including the ability to adapt and create solutions with them
• ▹Technical leadership potential: initiative, ownership and the ability to drive technical innovation
• ▹Curiosity and a genuine drive to continuously learn and adopt new technologies and approaches
• ▹Excellent problem-solving and analytical skills
• ▹Strong communication and interpersonal skills
• ▹Upper-Intermediate English level or higher

Nice to have

• ▹Prior experience as a Tech Lead, Software Architect or in a similar senior technical role
• ▹Experience building optimization and analytics modules
• ▹Experience with cloud computing platforms such as AWS, Azure or GCP
• ▹Experience with infrastructure design and Infrastructure-as-Code
• ▹Familiarity with Clean Code, SOLID and high software engineering practices
• ▹Experience with Spring and Spring Boot frameworks
• ▹Experience with NoSQL and relational databases
• ▹Experience working with Vertica or other column-oriented databases
• ▹Experience with Linux and Kubernetes (k8s)
• ▹Experience with Spec-Driven Development (SDD) and designing AI-enabled development workflows, a strong advantage

Soft skills

What we offer

• ▹Flexible work environment, opportunity to work remotely
• ▹1:1 English classes
• ▹Premium medical insurance
• ▹Supportive, collaborative, international team
• ▹All necessary equipment provided
• ▹Full accounting assistance in Ukraine and Poland
• ▹18 days of annual vacation and 7 days of sick leave without a doctor's note
• ▹Flexible payment system that allows withdrawing funds in one click, with about twenty withdrawal options

About the company

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. The client is a world-leading wireless technology innovator delivering breakthroughs in 5G, Wi-Fi and AI.