Вакансії Backend Developer

We are looking for a Python Full Stack Engineer to join IntelliArts within a dynamic team at Ryffine – a leading consultancy focused on modernizing technical content and helping organizations build sustainable, intelligent content infrastructures.
As part of the team, you will have the opportunity to make a real impact on product development by contributing to innovative solutions for technical documentation migration. The role will focus on streamlining and automating current processes using React, Python, and AWS serverless architecture. Candidates will help improve engineering workflows, enhance UI/UX for consultants, and integrate AI and automation tools to transform technical content management.

Required Skills

• 3+ years of experience using Python
• Excellent understanding of the OO design/programming paradigm
• Solid background in computer science and programming
• Strong knowledge of databases and networks
• Experience with AWS and deploying cloud-based applications
• Ability to think beyond technical solutions to address business challenges
• At least Upper Intermediate English

As a plus

• Front-end development experience (e.g., React or other modern JS frameworks)
• Interest or experience in AI-related projects

Personal Profile Overview

• Degree in Computer Science, Software Engineering or related field
• Stability in previous employment history with a tendency to remain with employers for extended periods
• Experience in managing diverse project activities (not just coding, but also requirements analysis, preparing estimations)
• Clear and effective communication skills, both verbal and written, ability to convey ideas, information, and messages accurately and efficiently
• Proficiency in fostering effective collaboration and teamwork activities
• Ability to analyze information, assess situations, and make decisions based on sound reasoning and logical evaluation
• Focus on delivering exceptional customer experiences and prioritizing customer satisfaction
• Analytical thinking, problem-solving abilities, and strategic approach to technical challenges
• Transparency in sharing the information within a team and company
• Willingness to acquire new knowledge and insights to enhance professional growth and performance

Are you passionate about healthcare and technology? Join our medical software department as a Software Development Engineer С++. Mimics software allows users to process and edit 2D image data (CT, MRI, etc.) to construct 3D models with the utmost accuracy, flexibility, and user-friendliness. The powerful segmentation tools allow them to segment medical CT/MRI images, take measurements, and engineer directly on the 3D model. From there, users can export 3D data to a wide range of output formats and engineering applications, such as FEA, design, surgical simulation, additive manufacturing, and more.

What you will do:

• Design, develop, and maintain efficient, reusable, and reliable C++ code to develop an industry-standard 3D medical image segmentation software.
• Identify and resolve performance bottlenecks and bugs, ensuring robust and high-quality software deliveries.
• Uphold and improve code quality, organization, and automation processes across the development team.
• Collaborate in the development and support of cross-product platforms to foster integration and seamless functionality.
• Develop user interfaces using QT, focusing on creating intuitive and user-friendly experiences.
• Conduct code reviews and provide technical consultancy to team members, promoting best practices and continuous improvement.
• Create detailed design specifications that guide the development and implementation of new features and enhancements.
• Integrate desktop products with cloud services, enhancing connectivity and expanding functionality.

Your profile:

• Proven experience in software engineering with a strong focus on C++ development;
• Expertise in identifying and resolving software bottlenecks and bugs;
• Demonstrated ability to maintain high code quality and organization;
• Experience in cross-product platform development and support;
• Strong skills in code review and providing technical guidance;
• Ability to create clear and comprehensive design specifications;
• English language proficiency (at least B2 level, ability to communicate with colleagues in a multinational environment).

Plus points:

• Degree in engineering, math, physics, or similar;
• Knowledge of QT for user interface development;
• Experience with cloud integration for desktop products.

If you are passionate about knowing that what you do is important and that what you create matters, then we have the right job for you. Value is not just an empty word to us here at Materialise — it means developing software solutions to help people walk, run, and jump again. It means engineering to help customers develop better products and add more functionality. Materialise Medical has pioneered many leading medical applications of 3D printing, enabling researchers, engineers, and clinicians to revolutionize innovative patient-specific treatment that helps improve and save lives. As an engineer, you will be responsible for implementing features and ensuring they meet rigorous quality standards of medical software, resulting in a product that is used by surgeons around the world.

What you will do:

• Participate in technical discussions and bring new ideas to the table.
• Design, implement, test, deploy, maintain, and improve our software components and services.
• Own the quality of your code (i.e., unit tests, TDD, and other test methodologies).
• Work with product managers, functional analysts, and architects to design and specify new features from the engineering standpoint.
• Embrace and use state-of-the-art new technologies.
• Author internal tools that improve the team’s quality and productivity.
• Contribute to the positive, solution-focused, and creative team spirit.
• Work closely with other software engineers to optimize the design, quality, and functionality of the product.

Your profile:

• Bachelor’s degree in computer science, Engineering, or a related field;
• Good coding skills using OOP languages like C#, Java, or similar;
• Good understanding and practical experience of OOP, OOP Design Patterns;
• 3+ years of industry experience designing, building, testing, and shipping software;
• Exceptional problem-solving skills;
• Good communication skills;
• Coding skills in Typescript (will be a plus);
• Mathematical background (i.e. understanding of Vertex and Matrix algebra) (will be a plus);
• Proficiency in both written and spoken English;
• Desire to work in teams where collaboration and knowledge sharing are the way to meet common goals;
• It is crucial that you can see your contributions as part of a larger team: how does your solution fit into the overall product and will it meet its needs in the best possible way? This skill combines the ability to break down tough problems, creative thinking, and hard work, to turn these challenges into solutions.

We are looking for a backend developer.

Requirements:

• Commercial development experience of 6 months or more.
• Mathematical mindset and love for programming.
• Understanding how HTTP works.
• Experience with such technologies as JavaScript/ES6, Node.js; Nest; MongoDB;
• MySQL or other SQL; Redis; Docker.

As a plus to know:

• GraphQL;
• Microservices;
• React та Frontend-стек, Server Side Rendering (SSR).

Responsibilities:

• Propose & implement suitable architectures for various business requirements;
• Translate user stories and use cases into functional applications;
• Design, build and maintain efficient, reusable and reliable code;
• Ensure performance, quality & responsiveness of the application;
• Identify issues and propose and implement solutions to address them;
• Help to maintain code quality, documentation, organization and automatization.

Requirements:

• 2+ years of development experience in .NET;
• Proficient in C# (at least 2 years) with a good knowledge of .NET ecosystem;
• Good knowledge of SQL base database management systems with experience of designing a database;
• Experience with Web API;
• Experience with RabbitMQ, Kafka;
• Strong understanding of OOP, OOD, design patterns and principles;
• Ability to write reusable and supportable code covered by unit-tests;
• Familiarity with automated testing and version control;
• Understanding of agile methodology;
• At least Intermediate level of English;
• Experience with .NET Core;
• Familiarity with CI/CD systems;
• Some experience in Financial Services.

We’re looking for a Senior Node.js Backend Developer to join our team and help shape a global well-being platform. You’ll design scalable solutions, work with modern microservices on AWS and Serverless frameworks, and collaborate across teams to deliver impactful features. This is your chance to tackle complex challenges, modernize legacy systems, and contribute to a culture of innovation and growth.

About the project

The health app you’ll contribute to is a comprehensive well-being platform designed for companies worldwide. It’s the go-to resource for employees seeking support, guidance, and advice on challenges in their work and personal lives. Whether it’s reading an article on mental health, completing a financial assessment, or connecting with a counselor, the app has you covered.
It also offers fitness tracking, integrations, perks like gift cards, and social recognition features—all aimed at promoting employee well-being and fostering a positive workplace culture.

How we do it

Our team of 35+ backend developers is building and maintaining a large-scale, modern web infrastructure hosted on AWS, using technologies like Python, PHP, Node.js, Mongo, DynamoDB, and MySQL.
As our platform expands globally, we face exciting challenges like distributed data storage, performance optimization, and scaling. We work across the entire development lifecycle—designing solutions, writing and testing code, automating deployments, and collaborating with web, iOS, Android, QA, infrastructure, and product teams to deliver exceptional results.
We’re also migrating from a monolithic application to a microservices architecture using tools like the Serverless Framework and AWS services.
Our work environment is friendly and supportive, encouraging developers to learn, grow, and share ideas. We attend conferences, host team workshops, and explore new technologies to drive innovation and build a strong foundation for the future.

What we’re looking for

Technical skills matter, but what we value most is a positive attitude and a willingness to learn. Our backend team is looking for people who enjoy solving problems, building new things, and supporting their teammates. Strong communication, teamwork, and a knack for mentoring others are key to helping the whole team grow. If you’re excited about working with new technologies in a collaborative, supportive environment, this could be the perfect fit for you.

Requirements

• 5+ years of experience as a software developer
• 3+ years of experience with Node.js (NOTE: Primary experience Must be with Node.js, not as a secondary language)
• Experience with AWS & Lambda services
• Experience working with scalable/microservice architecture
• Proven working experience with serverless, event-driven architecture
• Experience writing tests and knowledge of TDD
• Knowledge of development principles such as OOP and SOLID
• Database design experience in non-relational databases; noSQL or key-value DBs like Redis, Mongo, and DynamoDB
• Experience with CI/CD platforms, such as CircleCI, Travis, GitHub Actions, or Azure Pipelines
• English and Ukrainian languages at Upper Intermediate level or higher

Nice to have:

• Experience with Federated GraphQL
• Experience with additional AWS services, such as API Gateway, SQS, SNS, and DynamoDB
• Experience with multiple software development languages, ideally Python or PHP
• Knowledge of Clean Architecture and DDD principles

We are looking for a talented and experienced Node.js Developer (blockchain experience) who thrives in a fast-paced environment and is ready to tackle new challenges.
The project involves the development of a system for working with cryptocurrencies that will partially replace the current structure used in the services. The system will be similar to the tools used by cryptocurrency exchanges for accepting and managing balances, but with specific features for distributing outgoing flows. The integration includes connecting to existing services, such as merchant platforms and systems for handling fiat payments.

Requirements

• 4+ years of experience with server-side JS/TS
• Solid understanding of TypeScript, JavaScript fundamentals and internals
• Experience with Express, NestJS or any other similar framework
• Flexible approach in regard to different programming languages/technologies
• Proven experience using any other stack (.NET/Go/Java/C++, etc.)
• Strong understanding of asynchronous programming, event-driven architecture, and non-blocking I/O
• Hands-on experience with Web3.js or Ethers.js for interacting with Ethereum or other EVM-compatible networks
• Understanding of smart contracts
• Familiarity with popular blockchains like Ethereum, Binance Smart Chain, or Layer 2 solutions
• Expertise in data structures, algorithms, and software design patterns
• Solid understanding of different software architectural patterns
• Experience with different RDBMSes (MySQL/PostgreSQL)
• Experience in writing complex SQL queries and their optimization
• Experience with different kinds of ORMs
• Familiarity with Docker, containerization and orchestration tools
• Strong analytical skills with the ability to think critically and solve complex issues
• Proficiency in writing unit tests, integration tests, and end-to-end tests

Would be a plus

• Familiarity with DevOps practices and infrastructure as code tools
• Understanding of consensus algorithms, cryptographic principles, and decentralized applications (dApps)

Responsibilities

• Write efficient, maintainable code
• Ability to efficiently design and implement separate self-sufficient components
• Participate in architectural discussions and technical decision-making
• Identify potential technical risks and develop mitigation strategies
• Ensure knowledge is effectively shared and maintained within the team
• Foster a collaborative and innovative development environment
• Perform cross code-review with team members
• Properly maintain documentation

We are looking for a NodeJS Backend Developer to develop new games, and maintain the current projects. The ideal candidate will be a hard-working professional able to undertake a variety of tasks and work diligently under pressure.

Roles & Responsibilities:

• Analyze & estimate project work effort and create development roadmaps.
• Development of new features.
• Implementing new services/features as a backend developer.
• Maintenance of existing functionality.
• Perform on-call rotations to provide support for urgent production issues..
• Optimize existing codebase for performance, reliability, and scalability
• Perform code reviews and engage in pair-programming sessions.
• Be a part of backend development team that is responsible for all aspects of ongoing software.
• Contribute to all phases of software development life cycle.
• Participate in software, and architecture design meetings.
• Participate in knowledge transfer, lead, coach, and mentor team members.
• Interest in the latest programming trends such as functional and reactive programming.
• Write unit and other automated tests.

Skills & Experience:

• Bachelor’s degree in Computer Science or similar;
• At least 4+ years of NodeJS (JS/TS) development experience;
• Primus, Socket.io and similar frameworks experience for websocket;
• Worked with large-scale distributed storage and database systems (Postgres);
• Experience with message brokers (e.g. MQTT, Kafka, RabbitMQ);
• Docker (Swarm) knowledge is desirable;
• Kubernetes, AWS (S3, Aurora RDS, Cloudfront), GCP, Linux O/S experience is desirable;
• Passion for technology and real-time applications;
• Positive mindset and details oriented approach;
• An open-minded person, proactive team-player;
• An agile mindset with excellent communication, documentation and team working skills.

Responsibilities:

• Be the lead of the tech team;
• Writing clean, maintainable, and efficient code;
• Code refactoring, moving some parts to microservices;
• Communicate and collaborate with team members and clients;
• Self-time management.

Requirements:

• At least 4 years of experience C#/.NET;
• Strong knowledge of .NET Core;
• Strong knowledge of Entity Framework;
• Experience in Elasticsearch;
• Experience with writing REST services and JSON;
• Experience with OpenAPI Specification;
• Database experience: MS SQL Server, PostgreSQL;
• Design patterns, SOLID;
• Experienced with Git and Gitflow.

Would be a plus:

• Experience with Client side (JavaScript/HTML/CSS/JSON);
• Experience in e-commerce.