Jobs Backend

Required Technologies:

Node.js, Express.js / Nest.js
JavaScript (ES6+) / TypeScript
SQL (PostgreSQL, MySQL), NoSQL (MongoDB, Redis)
REST API, GraphQL, WebSockets
Git (GitHub/GitLab), Docker (preferred)
Postman for API testing
 

Nice to Have:

Understanding of OOP, SOLID principles, and design patterns
Experience with testing frameworks (Jest, Mocha, Chai)
 

Requirements:

English level: B1 or higher
Strong motivation to learn and develop in backend engineering
 

We Offer:

Interesting and challenging projects
Vast opportunities for professional development
Competitive salary
Friendly team of professionals
Comfortable working environment

We are a development studio that launches digital products fast.

We build MVPs in 3–6 weeks and create services, web and mobile applications, and internal systems for clients from Europe, the USA, and Asia.

We work remotely, stay flexible, and focus on results.
We launch products and continue developing them together with our clients.

If you work in IT and want to build real products and see fast releases — you’re welcome to join us.

Who we’re looking for

 
Backend Developer (Middle+)

Focus on backend development and system architecture. Our typical tech stack:

• Node.js, NestJS, Express
• PostgreSQL, MongoDB
• ORM/ODM: Prisma, Mongoose
• API: REST, sometimes GraphQL
• Auth: JWT, OAuth, RBAC
• Payments: Stripe, PayPal, and similar solutions
• Realtime: WebSockets, Redis Pub/Sub (when needed)
• Caching: Redis
• Tooling: ESLint, Prettier, Swagger / OpenAPI
• CI/CD: GitHub Actions, Docker, basic DevOps
• Cloud/Hosting: AWS / GCP / Vercel / Railway (depending on the project)
• Monitoring: Sentry, LogRocket, Prometheus (when needed)
• Security: rate limiting, validation, API protection
 

What you’ll do

• Design and implement backend systems for MVPs and production
• Develop APIs for web and mobile clients
• Design database schemas and optimize queries
• Integrate payments, authentication, roles, and subscriptions
• Ensure system stability, security, and scalability
• Work with queues, caching, and background jobs
• Maintain API documentation
• Improve performance and reliability after launch

Skills we’re looking for

• Strong experience with Node.js, NestJS, and/or Express
• Experience with PostgreSQL and MongoDB
• Solid knowledge of Prisma and ORM concepts
• REST API design and understanding of backend architecture
• Experience with authentication, roles, tokens, and security
• Query optimization, indexing, and transactions
• Understanding when to use monoliths vs microservices
• Ability to use AI tools to speed up development: code generation, refactoring, testing, research (with mandatory quality checks before production)
• Git, pull requests, code reviews, and responsibility for results

What you get

• Fully remote work
• Flexible schedule
• International projects
• Fast MVP launches
• Long-term product development after release
• Ongoing projects instead of one-time tasks
• Small, strong team with minimal bureaucracy
• Professional and income growth

If you like fast launches and improving products after release, message us.

Project description

Join a team that's redefining banking technology!

Our client isn't a typical Swiss bank — it's a modern financial institution focused on delivering cutting-edge online trading and financial services. Unlike traditional banks weighed down by legacy systems, their tech stack is lean and innovative.

The team builds products that transform complex, fragmented risk data into clear, actionable insights, enabling smarter and faster decisions to reduce risk. We focus on core business areas such as account risk and work closely with key stakeholders - Risk department, Compliance department, and the Middle Office Fraud Center — to deliver impactful solutions.

You'll be part of a Scrum team of four, collaborating daily with stakeholders through stand-ups, status updates, and Agile ceremonies. We embrace best practices and modern communication tools: Zoom, Teams, Outlook, JIRA, Confluence, and more.

We continuously evolve our solutions to atomic microservices and self-contained systems, based on dockerized environments with CI and CD.

What we offer:
Professional Growth: access to local trainings, on-demand webinars, interactive workshops, and support for conferences and certifications.

Competitive Compensation: Regular annual reviews based on your performance and professional development.

Work-Life Balance & Fun: Team-building activities, corporate events, hackathons, and a variety of engaging initiatives.

If you're proactive, creative, and ready for new challenges, join us! Together, we'll enhance product quality and optimize processes while driving innovation.

Responsibilities

Overall responsibility for a team, its performance

Driving the Scrum processes, coaching the team, driving improvements

Contributing towards the technical direction of the products by being involved in technical design and delivery of components

Identifying potential risks and escalating to the manager and client

Communicating and interacting effectively with other Team Leads

Participation in meetings with the client (Stand Ups, Grooming, Planning, Demo, Retro, and other ad-hoc ones)

Requirements refinement, Sprint planning, and task estimation

Application development

Developing unit/integration tests, E2E, ensuring good development testing coverage

Lead a team of 3 developers

Participate in peer design and code reviews

Evaluate and adopt new development tools, libraries, and approaches to improve delivery quality

Skills

Must have

1+ year in Team Lead position [fresh experience during last 2 years]

At least 5+ years of proven experience in a Software Developer position

Java core, Java 11+ features

OOP/OOD knowledge, design patterns

HTML, CSS, JavaScript

Proven knowledge of ReactJS, Redux [2+ fresh years of proven experience]

Unit testing frameworks (JUnit, Mockito, etc.)

Spring framework, IOC

RESTfull services

Java-based application servers (e.g. Tomcat)

SQL knowledge, any RDBMS, Oracle/PostgreSQL is a plus

ORM, Hibernate in particular

Maven and Distributed SCM (GIT OR Mercurial)

CI tools experience (Jenkins)

Docker

Nice to have

Education: Bachelor's / Master's degree in computer science or computer engineering

Experience in finance/banking business domain

Unix usage experience

Kafka

Java 11-21

WebSocket

Languages

English: B2 Upper Intermediate,
Ukrainian: C2 Proficient

Impressit is looking for a Senior Full-Stack Software Engineer to join a cross-functional product team working on Certificate and Offset Management solutions within a Nature and Environmental Solutions IT portfolio.
This is a great opportunity to contribute to a meaningful, sustainability-driven product with real-world impact, supporting end-to-end management of carbon offsets, renewable energy certificates, and green gas solutions, while collaborating with international teams.

Location: Portugal or Spain (on-site or hybrid)
Start Date: ASAP

What do we expect?

— 5+ years of commercial experience as a Senior Full-Stack Software Engineer
— Strong hands-on experience with JavaScript / TypeScript
— Deep knowledge of Node.js, React, and modern full-stack architecture
— Solid experience with GraphQL, REST APIs, and scalable web applications
— Proven experience with cloud platforms (AWS or Azure) in production environments
— Strong experience working with databases (SQL and/or NoSQL)
— Advanced skills in writing and maintaining automated tests (Jest or similar)
— Strong understanding and practical use of CI/CD pipelines
— Excellent problem-solving, analytical, and debugging skills
— Strong Computer Science fundamentals (data structures, algorithms, OOP, system design)
— User-centric mindset with a strong focus on performance, accessibility, and UX
— Excellent communication skills and experience working in cross-functional, distributed teams
— Upper-Intermediate or higher level of English
— Must be located in Portugal or Spain

What will you do?

— Design and build full-stack web applications using Node.js, React, TypeScript, GraphQL, CSS, Webpack
— Develop robust, scalable, and well-tested services, ensuring high code quality
— Take ownership of features end-to-end, from design to production
— Collaborate closely with engineers, product managers, designers, and vendors
— Drive and improve CI/CD processes and cloud-based solutions
— Actively contribute to system architecture and technical decisions
— Ensure performance, accessibility, security, and usability of applications
— Mentor team members and promote best engineering practices

As a plus:

— Experience with GraphQL, Webpack, or similar advanced tooling
— Background in sustainability, energy, or environmental domains
— Passion for clean code, engineering excellence, and high-quality user experiences

It is a high-growth SaaS company selling IT Service Management, a space that is being propelled into high growth as businesses worldwide accelerate their digital transformation and start to adopt new workstyles for their employees.

We have over 4,000 customers in 140 countries. We are deployed in 42 different languages and used daily by over 100,000 system administrators. Our software impacts the daily working lives of over 9 million end users.

We’re looking for a Senior Developer to join our mission. If you’re passionate about building impactful products, love working with cutting-edge AI technologies, and want to help push the boundaries of what’s possible.
 

Responsibilities:

• Lead the development and maintenance of a high-quality software product.
• Design and implement effective APIs and algorithms to support AI-driven features.
• Collaborate with AI, machine learning, and data science teams to push technological boundaries.
• Mentor and guide developers, fostering growth and knowledge sharing
• Work closely with product and design teams to deliver impactful solutions
• Participate actively in agile workflows, ensuring rapid and reliable delivery

What We’re Looking For:

• 5+ years of hands-on experience in backend development with Node.js, JavaScript, and TypeScript
• Strong expertise with SQL databases, especially MySQL
• Familiarity with AI, machine learning, data science, or full-stack development is a plus
• Excellent problem-solving skills and ability to thrive in a dynamic, AI-centric environment
• Strong communication skills and a collaborative mindset
• Experience working in agile, fast-paced teams

• Freely Spoken English

   

What we offer:

• 20 working days’ vacation; 
• 10 paid sick leaves;
• 4 wellness days;
• public holidays;
• equipment;
• paid lunches;
• gym compensation;
• Many cool team activities.

Unidatalab is looking for motivated and ambitious students or recent graduates who are eager to take their first step into the world of AI-driven technologies. 

About the Client:

Our client develops an AI-powered voice solution for quick-service restaurants. The product combines NLP, speech recognition, and noise-cancellation technologies to automate drive-thru ordering. As a result, restaurants can significantly reduce wait times, improve order accuracy, increase operational efficiency, and enhance overall customer satisfaction.

Who We’re Looking For:

• 3rd+ year students or recent graduates in Computer Science, Software Engineering, or related fields who are ready to work full-time (8 hours/day); 
• Confident Python knowledge; 
• Upper-Intermediate spoken English; 
• Strong soft skills: responsibility, communication, proactivity, and good organisation. 

Tech stack: Poetry, Python (yaml, json, pytest), Git/GitHub. 

Hiring Process:

Our hiring process is straightforward:
HR Interview → Small Test Task on LeetCode → Technical Interview → Practical task to become familiar with the product & Client Interview (in English) → Offer. 

Why Join Us: 

• Working with the real AI product; 
• Flexible, remote-first environment; 
• Paid vacation, sick leaves & holidays.

We are seeking a highly skilled PHP Developer to join our dynamic team, specializing in building and maintaining robust, high-performance web applications. If you have a strong background in Symfony, MySQL 8.0, Redis, MongoDB, and experience managing high-load and big data projects, we want to hear from you!

Responsibilities:

• Develop, test, and maintain web applications using PHP and Symfony.
• Design and optimize complex databases, primarily MySQL 8.0, ensuring high performance and scalability.
• Work with MongoDB for managing and optimizing unstructured data storage.
• Integrate and manage message queues using RabbitMQ for asynchronous processes.
• Utilize AWS cloud services (EC2, S3, RDS, etc.) to deploy and manage applications in a scalable, secure environment.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Identify and resolve performance bottlenecks and bugs.
• Ensure the best possible performance, quality, and responsiveness of applications.
• Stay updated with the latest industry trends and technologies to bring innovative solutions to the team.

Requirements:

• Proven experience as a PHP Developer with a deep understanding of the Symfony framework.
• Expertise in MySQL 8.0, including performance optimization, indexing, and query optimization.
• Experience with message queue systems, particularly RabbitMQ.
• Hands-on experience with AWS services and infrastructure.
• Solid understanding of high-load and big data application development.
• Strong analytical and problem-solving skills, with a keen eye for detail.

Preferred Qualifications:

• Experience with containerization and orchestration tools (Docker, Kubernetes).
• Previous experience in a DevOps environment.
• Understanding of front-end technologies (JavaScript, React, Vue.js) is a plus.

We work with startups and established companies to create products in healthcare, fintech, eCommerce, and AI. This role offers real variety — new domains, evolving challenges, and steady professional growth instead of being locked into a single legacy system.

If you’re motivated by fast learning and building features that go live, this might be the right place for you.

What You'll Do

• Build and ship features - from small tasks to full modules as you grow
• Write clean code and learn best practices through code reviews
• Work alongside experienced engineers who'll help you level up
• Learn how production apps are built and scaled
• See different products and industries - faster learning curve

What We Work With

⚡ Python, FastAPI, Django, Pydantic, PostgreSQL, uv, Ruff

Gets You Extra Points

• Familiar with SQLModel, Alembic
• Used AI coding tools (Cursor, Claude Code, Copilot)
• Hands-on experience with any LLM integration
• Basic prompt engineering skills

What You Bring

• Solid understanding of Python
• Understanding of REST APIs
• Basic experience with SQL databases
• English: Intermediate+
• Willingness to learn and take feedback

What You Get

Work & Growth:

• Fully remote, flexible hours
• Structured code reviews
• Senior engineers who help you level up
• English practice sessions

Compensation:

• Salary in USD
• Performance reviews twice a year
• 15 days paid vacation + sick leave

🚀 Ready to level up? Apply now.

We are looking for a highly skilled C++ (Rust) Computer Vision engineer to join our mission-driven team. You will be responsible for the architectural design and implementation of CV solutions and application level development. You also will be working with Rust.

Responsibilities

• Architect CV solutions: Design and implement advanced computer vision algorithms for real-time applications. Integrate third-party computer vision and deep learning solutions.
• Application level development: Developing high-quality business logic on the edge and ensuring a seamless user experience.
• Optimize performance: Optimize end-to-end video pipelines for edge devices, ensuring low latency and high reliability.
• Hardware ownership: Own critical manufacturing and quality processes, including camera calibration, sensor quality assurance tools, and ISP (image signal processor) tuning.
• Real-world validation: Conduct and oversee test flights to validate software performance.

Core requirements & skills

• Strong background in computer science and mathematics.
• Strong development skills: Deliver clean, maintainable, and well-documented code. Experience with automated testing.
• Classical computer vision: Experience with CV and ISP algorithms: feature extraction, optical flow, noise reduction, low-light enhancement, digital video stabilization, etc.
• Object tracking: Understanding of object tracking using classical or deep learning approaches (e.g., SORT, DeepSORT).
• Edge computing & HW acceleration: Hands-on experience with embedded ` platforms such as Jetson, RPi, Rockchip, Coral, or Qualcomm.
• Upper-Intermediate level of English.

Nice-to-have skills

• Localization & navigation: Experience with visual odometry, SLAM, SfM, sensor fusion, and Kalman filters.
• Camera calibration: Understanding of camera models and calibration procedures.
• Advanced AI: Understanding of vision transformers (ViT), CNNs, RNNs, siamese networks.
• MLOps: Proficiency in the full ML lifecycle: data labeling, training, fine-tuning, quantization, deployment, benchmarking, and experiment tracking.
• UAV systems: Familiarity with flight control, control theory, state estimation, and the MAVLink protocol.
• Domain expertise: Prior experience in defence technology.

Technical stack

• Languages: Expert-level C++ or Rust. Python for research and scripting.
• Video & CV: GStreamer, OpenGL, Vulkan, OpenCL, GLSL, CUDA, V4L; OpenCV, NumPy, Eigen.
• Tools: Git, Docker, CI workflows, Yocto, ROS2.
• Deep inference: Experience with DL frameworks and inference runtimes: PyTorch, TensorFlow, ONNX, TensorRT, etc.
• Protocols & codecs: Understanding of HEVC, muxing, RTP.

We offer:

• Work from R&D office in Kyiv.
• The opportunity to contribute to the development of defense and high-tech innovations in Ukraine.
• Job type: full-time, schedule 5/2 (10–19 or 9–18).
• Official employment (gig-contract).
• 24 days of paid annual leave.
• Military service deferment for eligible employees with valid military registration documents.
• All necessary computer equipment and work-related tools.
• Office equipped with a generator and a stable internet connection.

Interview process:

1. Recruiting interview — 45 min
2. Technical interview — 1.5 hours
3. Final interview — 30 min

Please send your CV and we will come back to you within 5 working days in case your skills are suitable.

About Us:

Evowill is looking for a Junior Python Developer who is passionate about web development and eager to grow in a supportive and dynamic environment. We offer a clear path: starting with a hands-on internship and transitioning into a commercial project role — 100% of our juniors join real projects.

Requirements:

• Python, Django
• SQL (MySQL / PostgreSQL)
• REST API, OOP
• Linux
• Git, GitHub/GitLab
• English: Intermediate
• Pet projects on GitHub/GitLab
• Fast learner, organized, responsible

Would be a plus:

• Technical education (3rd year or higher)
• Experience with Django, SOLID, Docker, CircleCI, JavaScript, React, HTML, CSS, non-relational databases, testing

Internship Stage (3 months):

• Full-time, practical learning
• Pet projects, technical interview preparations, and soft skills training
• English Speaking Club
• Senior Developers mentors from Ukraine and Colombia
• Technologies: JS, TS, React, Next.js, Python, Django, Docker, PostgreSQL, AWS, etc.

Project Stage:

• Join commercial projects as a Full-stack developer
• Salary from $1000 with regular reviews
• Ongoing mentorship and technical support
• Optional English club and extra tech learning

Ever wanted to work on a real product team?

Join us! We're a US-based product company in the InsurTech domain, with 8 years on the market.

Our team is compact but filled with experienced developers, and we're on the lookout for our next team member.

Main Responsibility:

• Ongoing development of user-facing components using the TALL stack.
• Developing a cutting-edge AI product (context engineering, evals, tool calls).

• Support and extension of the complex insurance product database and calculations.

   

Must-Have:

• Proficient communication in English.
• Experience with Laravel.

• Full-stack skills — ship features end-to-end.

   

Nice-to-Have:

• TALL stack understanding.
• A solid understanding of UX principles.
• Skills in product management.
• Efficient use of Claude Code (or similar).

• Understanding of LLM APIs.

   

Your cover letter is your leverage.

Show us your passion, and we'll show you ours in return! :)

Are you a seasoned Java expert ready to lead a high-performing team in building secure, scalable, and impactful enterprise systems?

At Sigma Software, we value shared ownership, technical excellence, and continuous improvement. As a Senior Software Developer/Team Lead, you will guide a cross-functional team, shape the system architecture, and deliver solutions for regulated environments.

You’ll work in a collaborative environment, gain exposure to complex projects, and enjoy professional growth supported by modern engineering practices.

Sounds like you? Take your chance, and let’s grow up together.

Job Description:

• Lead a cross-functional team of 2–7 engineers, fostering ownership, quality, collaboration, and continuous improvement
• Stay hands-on with code while guiding technical decisions and system architecture evolution
• Design, review, and evolve system architecture with a focus on scalability, performance, and maintainability
• Collaborate with Product Owner, Business Analysts, DevOps, and other delivery teams to align solutions with business goals
• Mentor developers, conduct regular code and technical reviews, and support individual growth through 1:1 sessions
• Influence and improve development processes, engineering best practices, and team workflows
• Manage the full development lifecycle, including sprint planning, estimation, delivery tracking, and retrospectives
• Contribute to long-term technical vision and grow towards broader technical leadership or architectural roles
• Ensure security and data protection requirements are met in regulated environments
• Represent the technical team in stakeholder discussions, communicating progress, risks, and trade-offs

Qualifications:

• 6+ years of commercial software development experience
• 1–3 years in a Team Lead or Technical Lead role, or readiness to step into leadership
• Strong expertise in Java and at least one modern JavaScript framework (React, Angular, Vue)
• Solid understanding of software architecture patterns (microservices, event-driven systems)
• Experience with CI/CD pipelines and containerized environments
• Background in building enterprise, FinTech, or other complex distributed systems
• Strong communication skills with the ability to explain technical decisions and mentor others
• At least an Upper-Intermediate level of English

Will be a plus:

• Experience in regulated or security-sensitive environments
• Exposure to GovTech or FinTech domains
• Familiarity with AI or data analytics integrations in enterprise systems
• Motivation to grow beyond the current role and influence technical direction at scale

Ви досвідчений Java експерт, готовий очолити високоефективну команду та створювати безпечні, масштабовані й значущі корпоративні системи?
Ви працюватиме у командній атмосфері, матиме доступ до складних проєктів та можливість професійного зростання, підтриманого сучасними інженерними практиками.

Обовʼязки:

• Керувати кросфункціональною командою з 2 −7 інженерів, підтримуючи відповідальність, якість, співпрацю та постійне вдосконалення
• Бути залученим до написання коду, водночас спрямовуючи технічні рішення та розвиток архітектури системи
• Проєктувати та вдосконалювати архітектуру з фокусом на масштабованість, продуктивність та підтримуваність
• Співпрацювати з Product Owner, Business Analysts, DevOps та іншими командами для узгодження рішень із бізнес-цілями
• Менторити розробників, проводити регулярні code review та технічні огляди, підтримувати індивідуальний розвиток через 1:1
• Впливати на процеси розробки, впроваджувати інженерні best practices та вдосконалювати робочі процеси команди
• Керувати повним циклом розробки, включно з плануванням спринтів, оцінюванням, відстеженням виконання та ретроспективами
• Робити внесок у довгострокове технічне бачення та рухатися до ширших ролей технічного лідерства або архітектора
• Забезпечувати виконання вимог безпеки та захисту даних у регульованих середовищах
• Представляти технічну команду на зустрічах зі стейкхолдерами, комунікувати прогрес, ризики та компроміси

Вимоги:

• 6+ років комерційного досвіду у розробці ПЗ
• 1–3 роки досвіду на позиції Team Lead або Technical Lead, або готовність перейти в лідерську роль
• Глибокі знання Java та щонайменше одного сучасного JavaScript-фреймворку (React, Angular, Vue)
• Чітке розуміння шаблонів архітектури ПЗ (microservices, event-driven systems)
• Досвід роботи з CI/CD-пайплайнами та контейнеризованими середовищами
• Досвід створення корпоративних, FinTech або інших складних розподілених систем
• Сильні комунікаційні навички, здатність пояснювати технічні рішення та менторити інших
• Рівень англійської не нижче Upper-Intermediate

Буде плюсом:

• Досвід роботи в регульованих або чутливих до безпеки середовищах
• Знання доменів GovTech або FinTech
• Ознайомленість з інтеграціями AI або data analytics у корпоративних системах
• Мотивація розвиватися за межі поточної ролі та впливати на технічний напрямок у масштабі

We are seeking a prospective and ambitious Senior/Lead Python Engineer to join our team.

Responsibilities :

• Understand business needs and implement functional requirements accordingly
• Work independently and directly with stakeholders when needed
• Help in designing the software
• Build efficient back-end features in Python
• Implement designs into code by collaborating with UI/UX designers
• Keep suggesting improvements and ways to enhance the functioning of the software
• Be focused on quality

Requirements :

• 6+ years of experience in Python
• 2+ years in FastAPI
•  Ready to lead a team
• Must have: Amazon SES, AWS Lambda, Mongo DB, MicroServices architecture, and Serverless
• Experience with Mobile projects or readiness to deep dive into the domain fast 

Good to have: 

• GCP, GBQ, Cloudflare
• Excellent verbal and written skills in English
• Experience with Azure DevOps is a plus

The ideal candidate is also:

• Pragmatic: gets things done, can find a creative compromise between an ideal technical solution and actual client needs
• Understand the value of testing, quality, continuous integration, source control, and code reviews
• Able to analyze, plan, and estimate requirements as well as identify risks involved and provide solutions to them
• Good communication skills and excellent teamwork capabilities
• Independent and self-motivated with a can-do attitude
• Capable of executing under uncertainty, in a dynamic environment

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

N-iX is looking for skilled Senior/Lead Python Engineer to join our team! Our customer is a is a fintech company that provides flexible buy-now-pay-later solutions, enabling consumers to split purchases into transparent, interest-free or interest-based payments. Customer's Platform team is responsible for managing critical services that are essential to the success and sustainability of the organisation. In simple terms, the team handles transactional communication send-outs to customers via email, SMS, and push notifications. These services demand attention to detail, proactive maintenance, and swift response times to ensure seamless operations. The recent high-priority initiatives include re-architecture/platform modernisation, high availability and internationalisation efforts; these are vital for our organisation's growth and competitiveness in the market. These initiatives require dedicated expertise and resources to execute efficiently and effectively.

Requirements:

• 5+ years designing, developing, and launching backend systems at scale using Python. 
• Proven track record of developing highly available distributed systems using technologies such as AWS, MySQL, and Kubernetes.
• Technical Planning and Code Quality.
• Experience defining a technical plan for significant feature or system component delivery with an elegant, simple, and extensible design.
• Writes high-quality code that is easily understood and used by others.
• Proficiency at making significant changes in a large code base and has developed tools and practices to do so safely.
• Strong verbal and written communication skills to support effective collaboration with a global engineering team.
• Kotlin experience is a nice-to-have.

Responsibilities:

• Provide the design and development of scalable, highly available backend systems using Python.
• Own technical planning and architecture for major features and system components, ensuring simple, extensible, and long-term solutions.
• Drive best practices for code quality, maintainability, and safe evolution of large codebases.
• Make and oversee significant changes in complex systems, ensuring reliability through testing, reviews, and deployment discipline.
• Contribute to and guide the development of distributed systems on AWS, MySQL, and Kubernetes.
• Provide technical leadership through design reviews, mentoring, and hands-on implementation.
• Collaborate effectively with a global engineering team through clear written and verbal communication.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

A FinTech payment gateway for the US market. The platform integrates with payment providers and processes transactions for US-based merchants.

What You’ll Be Doing

• Develop and maintain features across the full stack — from task clarification to production release.
• Build and support backend services using Node.js (Express).
• Work with databases, primarily PostgreSQL, and occasionally MongoDB.
• Develop responsive UI components using React and ensure smooth frontend-backend interaction.
• Integrate with external payment providers and maintain stable, well-documented APIs.
• Participate in code reviews and contribute to improving code quality and maintainability.
• Support debugging, issue resolution, and performance improvements in collaboration with senior engineers.

Requirements (Middle Level)

Must-have:

• 2–4 years of commercial development experience (full-stack or backend with React experience as a plus).
• Solid knowledge of Node.js and experience with Express or a similar framework.
• Experience designing and developing REST APIs (validation, status codes, authentication, versioning).
• Practical experience with PostgreSQL (queries, basic indexing, simple query optimization).
• Hands-on experience with React (components, hooks, forms, API integration).
• Good understanding of Git and collaborative workflows (PRs, code reviews, branching strategies).
• Ability to independently handle medium-complexity tasks, clarify requirements, and deliver features to production.

Nice to Have:

• Experience with MongoDB.
• Exposure to FinTech, payment integrations, or understanding of PCI-related constraints.
• Basic experience with unit/integration testing.
• Familiarity with Docker and CI/CD pipelines.

Working Hours

• Availability to work with US stakeholders - approximately 16:00 - 01:00 Kyiv time.