5Blue Software

Hi there,

We are looking for a Senior Full-Stack Engineer (Python + React/Next.js) with AI experience to join our team!
 

You’ll be joining an international consulting company that helps enterprises modernise their systems through cloud technologies, data platforms, and artificial intelligence.

Requirements:

• Strong proficiency in full-stack development
• 7+ years of experience with Python
• 3+ years of experience with React, TypeScript and Next.js 
• Proven experience writing application code for AWS
• Familiarity with AWS Containers
• Experience with cloud-native architectures
• Experience with GenAI integration

• Background in data-heavy or AI-related projects

   

Responsibilities:

• Build and maintain scalable web applications running on AWS
• Design serverless workflows and backend services
• Develop fast, user-friendly interfaces with React and Next.js
• Ensure secure authentication and authorisation across applications

• Work closely with AI/ML engineers to embed intelligent functionality into products

   

What we offer:

• Flexible Work Environment: Opportunity to work fully remotely.
• 1:1 English Classes: Individual English language lessons to improve communication skills.
• Great Team: Supportive, collaborative, and dynamic international team culture.
• Equipment Provided: All necessary equipment supplied for efficient and comfortable work.
• Paid Time Off: 18 days of paid annual vacation and 7 paid sick leave days.
• Public Holidays: Ukrainian public holidays are preserved.
• Commitment to Hiring Ukrainians: We are dedicated to hiring Ukrainian talent and promoting Ukraine as a great place to work.

• Flexible Payment System: Multiple convenient payment options with easy fund withdrawal.

   

Does this position sound like a perfect match? We’re eager to hear from you!

Hi there,

We’re looking for a talented Senior Node.js Developer to help build the next generation of AI-driven finance solutions.

Location: Europe only, preferably Poland.

About the project:

Our client provides an AI-powered platform that revolutionises corporate expense management by automating approval workflows, tracking real-time spending, and offering data-driven budgeting insights.

Designed for mid to large-sized businesses (200 to 10,000 employees), the solution ensures scalability and flexibility, enabling greater control over expenses while enhancing employee autonomy.

By replacing traditional expense reports, it streamlines financial processes, helping companies embrace digital finance through intelligent, integrated software!

Requirements:
— 7+ years of backend development experience with production systems
— Proficiency in Node.js for building scalable backend applications
— Strong experience with SQL databases (MySQL, PostgreSQL), including query optimization and performance tuning
— Familiarity with backend frameworks such as Express.js or similar
— Experience working in Agile environments
— Strong analytical and problem-solving skills for performance optimization and system efficiency
— Excellent collaboration and communication skills within cross-functional teams
— Experience with cloud services (AWS, GCP, Azure)
— Familiarity with microservices architecture and containerization (Docker, Kubernetes)
— Knowledge of CI/CD practices
— Strong experience with AI development tools and frameworks
— Upper-Intermediate English level or higher

Responsibilities:
— Design, implement, and maintain scalable, secure, and high-performance backend systems
— Build and manage RESTful APIs for seamless integration and smooth user interactions
— Optimize database queries, manage schemas, and ensure data integrity with large datasets
— Collaborate with frontend engineers, product managers, and cross-functional teams to deliver impactful features
— Contribute to system architecture design, ensuring scalability, resilience, and maintainability
— Participate in code reviews, refactor code for performance, and suggest optimizations
— Ensure backend processes follow security, compliance, and data privacy best practices
— Monitor and optimize backend performance for a smooth user experience

What we offer:
— Flexible Work Environment: Opportunity to work remotely
— 1:1 English Classes: Individual English language training to enhance communication skills
— Great Team: Supportive, collaborative, and dynamic international team
— Equipment Provided: All necessary equipment supplied for efficient job performance
— Annual Vacation: 18 days of paid vacation and 7 days of paid sick leave
— Commitment to Hiring Ukrainians: Dedicated to hiring Ukrainian talent and promoting Ukraine as a fantastic place to work
— Flexible Payment System: Allows you to withdraw funds easily with multiple options

Does this position sound like a perfect match? We’re eager to hear from you!

Hi there,

We’re looking for a talented Senior Node.js Developer to help build the next generation of AI-driven finance solutions.

Location: Europe only.

About the project:

Our client provides an AI-powered platform that revolutionises corporate expense management by automating approval workflows, tracking real-time spending, and offering data-driven budgeting insights. Designed for mid to large-sized businesses (200 to 10,000 employees), the solution ensures scalability and flexibility, enabling greater control over expenses while enhancing employee autonomy. By replacing traditional expense reports, it streamlines financial processes, helping companies embrace digital finance through intelligent, integrated software!

Requirements:
— 7+ years of backend development experience with production systems
— Proficiency in Node.js for building scalable backend applications
— Strong experience with SQL databases (MySQL, PostgreSQL), including query optimization and performance tuning
— Familiarity with backend frameworks such as Express.js or similar
— Experience working in Agile environments
— Strong analytical and problem-solving skills for performance optimization and system efficiency
— Excellent collaboration and communication skills within cross-functional teams
— Experience with cloud services (AWS, GCP, Azure)
— Familiarity with microservices architecture and containerization (Docker, Kubernetes)
— Knowledge of CI/CD practices
— Strong experience with AI development tools and frameworks
— Upper-Intermediate English level or higher

Responsibilities:
— Design, implement, and maintain scalable, secure, and high-performance backend systems
— Build and manage RESTful APIs for seamless integration and smooth user interactions
— Optimize database queries, manage schemas, and ensure data integrity with large datasets
— Collaborate with frontend engineers, product managers, and cross-functional teams to deliver impactful features
— Contribute to system architecture design, ensuring scalability, resilience, and maintainability
— Participate in code reviews, refactor code for performance, and suggest optimizations
— Ensure backend processes follow security, compliance, and data privacy best practices
— Monitor and optimize backend performance for a smooth user experience

What we offer:
— Flexible Work Environment: Opportunity to work remotely
— Premium Medical Insurance: Comprehensive health insurance for your well-being
— 1:1 English Classes: Individual English language training to enhance communication skills
— Great Team: Supportive, collaborative, and dynamic international team
— Equipment Provided: All necessary equipment supplied for efficient job performance
— Annual Vacation: 18 days of paid vacation and 7 days of paid sick leave
— Commitment to Hiring Ukrainians: Dedicated to hiring Ukrainian talent and promoting Ukraine as a fantastic place to work
— Flexible Payment System: Allows you to withdraw funds easily with multiple options

Does this position sound like a perfect match? We’re eager to hear from you!

Hi there,

We’re looking for a talented Senior Node.js Developer to help build the next generation of AI-driven finance solutions.

Location: EU

About the project:

Our client provides an AI-powered platform that revolutionises corporate expense management by automating approval workflows, tracking real-time spending, and offering data-driven budgeting insights.

Designed for mid to large-sized businesses (200 to 10,000 employees), the solution ensures scalability and flexibility, enabling greater control over expenses while enhancing employee autonomy.

By replacing traditional expense reports, it streamlines financial processes, helping companies embrace digital finance through intelligent, integrated software!

Requirements:
— 7+ years of backend development experience with production systems
— Proficiency in Node.js for building scalable backend applications
— Strong experience with SQL databases (MySQL, PostgreSQL), including query optimization and performance tuning
— Familiarity with backend frameworks such as Express.js or similar
— Experience working in Agile environments
— Strong analytical and problem-solving skills for performance optimization and system efficiency
— Excellent collaboration and communication skills within cross-functional teams
— Experience with cloud services (AWS, GCP, Azure)
— Familiarity with microservices architecture and containerization (Docker, Kubernetes)
— Knowledge of CI/CD practices
— Strong experience with AI development tools and frameworks
— Upper-Intermediate English level or higher

Responsibilities:
— Design, implement, and maintain scalable, secure, and high-performance backend systems
— Build and manage RESTful APIs for seamless integration and smooth user interactions
— Optimize database queries, manage schemas, and ensure data integrity with large datasets
— Collaborate with frontend engineers, product managers, and cross-functional teams to deliver impactful features
— Contribute to system architecture design, ensuring scalability, resilience, and maintainability
— Participate in code reviews, refactor code for performance, and suggest optimizations
— Ensure backend processes follow security, compliance, and data privacy best practices
— Monitor and optimize backend performance for a smooth user experience

What we offer:
— Flexible Work Environment: Opportunity to work remotely
— Premium Medical Insurance: Comprehensive health insurance for your well-being
— 1:1 English Classes: Individual English language training to enhance communication skills
— Great Team: Supportive, collaborative, and dynamic international team
— Equipment Provided: All necessary equipment supplied for efficient job performance
— Annual Vacation: 18 days of paid vacation and 7 days of paid sick leave
— Commitment to Hiring Ukrainians: Dedicated to hiring Ukrainian talent and promoting Ukraine as a fantastic place to work
— Flexible Payment System: Allows you to withdraw funds easily with multiple options

Does this position sound like a perfect match? We’re eager to hear from you!

Hi there,

We are currently seeking a Senior Java Engineer to join our growing team.

About the project:

Our clients are enabling a world where everyone and everything can be intelligently connected. As the world’s leading wireless technology innovator, we continue to push the boundaries of what’s possible across devices and networks to enable next-generation experiences and drive digital transformation.

We deliver breakthroughs in 5G, Wi-Fi and AI. But that’s just the beginning. We design platforms, chipsets, software, tools, and services that help OEMs and developers bring those technologies into products and create experiences that change how we live and work.

And we do this at scale, building technologically advanced, in-demand end products that support everything from low- to high-complexity devices, helping us serve virtually every industry at the connected intelligent edge.

Requirements:

— 7+ years of experience with Java.

— Solid experience with the Spring framework, Spring Boot, Kotlin, Kubernetes.

— Experience in SQL, NoSQL, Big Data tools and microservices.

— Experience with Git and Maven.

— Deep understanding and strong Computer Science fundamentals: object-oriented design, data structures, application programming, and multithreading programming.

— Strong API Development experience with as many years of experience as possible.

— Upper-intermediate and higher English level.

— Team player with strong communication, interpersonal, and presentation skills.

— Stable long-term involvement in projects for 2+ years.

Responsibilities:

— Design and develop infrastructure and features for thousands of websites and over 1.4B users across the open web.

— Be responsible for large scale systems that generate billions of dollars, over 500,000 requests / second and 100TB of new data every day.

— Have end to end ownership: Innovate, design, build, ship, measure and maintain our backend services.

— Collaborate with the brightest software engineers.

— Leverage full CI/CD pipelines, A/B testing, and real Big Data environments to deliver high-impact solutions and observe their results in near real-time.

What we offer:

— Flexible Work Environment: Opportunity to work remotely.

— Premium Medical Insurance: Comprehensive health insurance to ensure your well-being.

— 1:1 English Classes: Individual English language training to enhance your communication skills.

— Great Team: Work with a supportive, collaborative, and dynamic international team.

— Equipment Provided: All necessary equipment supplied for efficient job performance.

— Annual Vacation: 18 days of paid vacation and 7 days of paid sick leave.

— Commitment to Hiring Ukrainians: We are dedicated to hiring Ukrainian talent and promoting Ukraine as a fantastic place to work.

— Flexible payment system, which allows you to withdraw funds in one click and has about twenty withdrawal options.

The recruitment process includes 4 interviews.

1. Initial meeting with HR — 30 min
2. Introduction + Technical interview (including coding task) — 1.5 hours
3. Architectural interview — 45-60 min

4. Final managerial interview — 1 hour

    

If you have any questions do not hesitate to ask us :)