5Blue Software

Role Description Our client runs a travel parking app and wants to grow it by adding features people genuinely need. We're looking for a marketing specialist to lead product marketing research and help uncover the client's next signature feature — one that could set the app apart from competitors. - Research competitors: features, positioning, pricing, messaging. - Find real user pain points and unmet needs (reviews, communities, forums, social platforms, etc.). - Turn findings into a prioritized list of feature ideas, incl. 1–3 standout candidates. - Deliver a summary with methodology, key findings, and a recommendation on what to test first on a landing page. Qualifications - Experience in product marketing research, competitive analysis, or feature discovery. - Ability to independently find and evaluate relevant sources. - Strong analytical skills — able to turn research into a clear, actionable recommendation. - Travel-tech, mobility, or consumer app experience is a plus. Benefits - Fully remote work — collaborate from anywhere. - Part-time, task-based engagement with flexible hours that fit around your schedule. - Flexible payout system — withdraw your earnings in one click, with around twenty withdrawal options to choose from. Company Description 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.

Role Description 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. - 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 - Work in an AI-native engineering environment that uses modern coding agents and spec-driven development to accelerate high-quality delivery Qualifications - B.Sc. in Computer Science or Software Engineering - 6+ years of experience in software development using Java - Strong communication and interpersonal skills - Fluent English Requirements - Technology stack: Java, Spring Boot, microservices, Kubernetes, Linux, cloud platforms, SQL/NoSQL databases, Vertica, large-scale data processing, network automation, and AI-assisted development workflows - Strong experience in designing and implementing complex algorithms and architectures using Java - Excellent problem-solving skills - Experience working with microservices architecture - Experience working with big data applications using advanced SQL capabilities - Hands-on experience using AI coding tools such as Codex, Claude Code, Copilot, or similar agents as part of the software development lifecycle Benefits - Flexible work environment with the opportunity to work remotely - 1:1 English classes for individual language training to enhance communication skills - Premium medical insurance for comprehensive health coverage - Great team offering a supportive, collaborative, and dynamic international work environment - Equipment provided to ensure efficient job performance - Accounting support with full assistance in Ukraine and Poland - Paid time off, including 18 days

Role Description 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. - 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. Qualifications - B.Sc. in Computer Science or Software Engineering. - 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). - Proficient in Microservices and Spring Boot. - Expert in the latest JavaScript technologies (Vue.js / React). - 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. Requirements - 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. Benefits - 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.

Role Description We are looking for a Senior AI Engineer to join one of our client projects — an early-stage US-based wellness AI startup. You will work as a fractional contributor, starting with a structured technical handoff from the outgoing engineering team, then transitioning into ongoing launch support and system maintenance. You will need to take real technical ownership, communicate clearly with the client, and hit the ground running with minimal onboarding from our side. Qualifications - 7+ years of software engineering experience - Expert-level proficiency in AI/ML engineering - Excellent spoken and written English (C1) — direct client communication is required - 5+ years working with LLMs — Claude, OpenAI, or equivalent — in production environments - Hands-on experience building agentic and multi-turn conversational systems - Strong prompt engineering skills — system prompts, structured outputs, context management, cost vs. quality tradeoffs - Experience with tool/function calling, memory layers, and RAG pipelines - Familiarity with LLM observability — logging, tracing agent steps, monitoring output quality - Understanding of prompt injection risks, output validation, and guardrails - Ability to get up to speed on an unfamiliar codebase quickly and document it clearly - Experience with messaging integrations will be a plus - Self-directed and comfortable taking ownership with minimal oversight Requirements - 7+ years of software engineering experience - Expert-level proficiency in AI/ML engineering - Excellent spoken and written English (C1) — direct client communication is required - 5+ years working with LLMs — Claude, OpenAI, or equivalent — in production environments - Hands-on experience building agentic and multi-turn conversational systems - Strong prompt engineering skills — system prompts, structured outputs, context management, cost vs. quality tradeoffs - Experience with tool/function calling, memory layers, and RAG pipelines - Familiarity with LLM observability — logging, tracing agent steps, monitoring output quality - Understanding of prompt injection risks, output validation, and guardrails - Ability to get up to speed on an unfamiliar codebase quickly and document it clearly - Experience with messaging integrations will be a plus - Self-directed and comfortable taking ownership with minimal oversight Company Description 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.