Jobs Backend

We at Sigma Software are looking for a Python Developer to join an exciting project for a global telecommunications leader. 

This is a full-time position based in Ukraine with the flexibility of remote work. You will be part of a skilled Agile team building a high-impact web application that manages and tracks hardware inventories for millions of users. 

At Sigma Software, we value innovation, professional growth, and work-life balance. You’ll enjoy working in a collaborative environment and contributing to impactful solutions.

CUSTOMER 
Our customer is a leading telecommunications company recognized for delivering innovative, large-scale technological solutions. Operating globally, they provide advanced communication services and infrastructure to millions of users and businesses. Known for their commitment to cutting -  edge technology, scalability, and reliability, they offer a dynamic and forward-thinking work environment. 

PROJECT 
The project involves developing a web application to manage and  track customers' hardware inventories. It supports the full lifecycle of hardware contracts and products,  enabling efficient reporting, monitoring, and operational control. The  application integrates with existing systems, leverages modern frameworks, and follows SAFe Agile methodology to ensure high-quality delivery. 

Key Technologies: Python, Django, Django REST Framework, PostgreSQL, Celery, AWS, Unix, Bash, Angular/React 

Job Description

• Design and implement well-structured, maintainable, and robust code solutions
• Develop new features and components, perform refactoring, debugging, and ongoing maintenance
• Conduct peer code reviews and adhere to established engineering practices
• Perform unit and integration testing to ensure code quality
• Analyze requirements and prepare detailed technical designs for features
• Create and maintain technical documentation
• Participate in customer meetings, including conference calls and face-to-face sessions

• Actively contribute to SAFe Agile ceremonies, including estimation, grooming, and planning sessions

   

Qualifications

• 5+ years of experience in Python
• Practical expertise with Django, Django REST Framework (DRF), and Django ORM
• Solid understanding of PostgreSQL
• Experience writing unit tests using Python’s testing frameworks (e.g., TestCase)
• Familiarity with Celery for task scheduling and asynchronous processing
• Experience with AWS and Unix-based systems
• Bash scripting skills
• Experience with Angular or React
• At least Upper - Intermediate level of English

WILL BE A PLUS:

• Experience with microservices architecture
• Knowledge of Docker/Kubernetes
• Familiarity with CI/CD pipelines
• Understanding of telecom industry specifics

PERSONAL PROFILE:

• Proactive and detail-oriented
• Strong communication skills
• Ability to work effectively in distributed teams
• Adaptable and open to feedback
• Collaborative mindset

We're seeking a talented .NET Developer to help shape the future of blockchain technology in innovative startup. If you're ready to make a real impact in a cutting-edge industry, we'd love to hear from you!
 

Core Competence:
 

• At least 2 years of professional experience in software development with a strong foundation in C#, ASP.NET Core, and Entity Framework.
• Proficiency in managing IIS, MS SQL, Visual Studio, and Docker environments.
• Familiarity with ODBC, LINQ, NUnit, xUnit, NuGet, and RESTful APIs, alongside Git for version control.
• Sound understanding of client-side and server-side architectures.
• Strong analytical thinking, with a structured, math or engineering-oriented mindset and a focus on delivering results.
   

Preferred Qualifications:
 

• Knowledge of ReSharper, experience with Azure, and familiarity with NoSQL databases.
• Experience with AWS and Linux system administration is an asset.
• Active participation in hackathons demonstrates innovative thinking and problem-solving skills.
• Upper-intermediate level of English for clear and effective communication in a global team.
   

What We Offer You:
 

• Competitive Compensation: Your skills and experience will be rewarded with a salary aligned with industry standards and your career ambitions.
• Innovative Work Environment: Be part of a forward-thinking FinTech startup with a culture of continuous learning, including tech talks and participation in hackathons.

• 20 paid vacation days, 3 paid sick days, and a flexible schedule for work-life balance.

   

Stack: Golang, AWS, MySQL, Docker, Microservices.

We are seeking an experienced Golang Developer to join our team of talented developers for a stable yet dynamic project.

As the Golang Developer, you will play an integral role in developing, maintaining, and refactoring the existing codebase of a multi-service product with complex logic. You will work closely with our experienced Backend team and use the latest stack.

About the project:

A stable enterprise product for creating marketing presentations, preparing accompanying materials, and developing sales cycle business assistants for global pharmaceutical companies such as AstraZeneca, Novartis, Pfizer, Veeva etc., and financial institutions like ING and Van Lanschot. Completely our code base, we have been developing it since 2015.

Our services are distributed across multiple Availability Zones, adhering to a service-oriented architecture. Since 2018, we have prioritized GraphQL, although we maintain comprehensive support for RESTful APIs. Our core API services are built on a diverse stack of programming languages, each chosen to optimize task performance. This stack includes a rapidly evolving Golang Core API, legacy Core API services in PHP (leveraging frameworks like Laravel and Yii2) for established business logic and data layer interactions, Node.js (utilizing both JavaScript and TypeScript), Python APIs, and .NET Core C# components.

We utilize a hybrid cloud infrastructure, harnessing the strengths of both AWS and GCP to meet our operational needs, and focus on Serverless. Our work also involves extensive integration with API partners, including Veeva, Salesforce, and a variety of others, to ensure a seamless and robust service ecosystem.

As a product with high-security requirements, we undergo regular penetration testing from auditors and client companies to ensure compliance with industry standards such as OWASP, SOC, and ISO.

Essentials:

- Advanced knowledge of Golang, with experience in web frameworks such as Gin or Echo.

- Proficiency in developing automated tests using frameworks like Go Testing, Ginkgo, etc.

- Expertise in performance monitoring, optimization techniques, and troubleshooting.

- Strong knowledge of SQL and an understanding of transactions.

- Understanding of OOP, design patterns, cryptography, algorithms, and data structures.

- Versatility and comprehension of how all aspects of a web project work together (frontend, backend, and the network layer).

- Basic System Design skills.

- English reading and writing: Upper Intermediate.

- English speaking: Lower Intermediate.

Nice-to-haves:

- Development experience with Node.js, PHP.

- Knowledge of serverless architectures, especially AWS.

- Experience in building APIs using REST and GraphQL.

- Understanding of EDA, Microservices, Hexagonal Architecture.

- Proficiency in Docker.

- Experience with CI/CD Pipelines.

- Familiarity with agile methodologies (Scrum, Kanban).

- Degree in Computer Science.

- English speaking: Upper Intermediate.

Benefits:

In addition to a great base salary, we offer:

1) Funding for conferences, co-working spaces, software licenses, and other work-related expenses

2) MacBook if you require one

3) Mobile devices if you are involved with mobile development projects

4) Flexible working hours and fully remote working without micromanagement

5) Modern technology stack

6) Time for open source development

7) Bonus at the end of the year

8) Paid study leave

9) Paid English language courses

10) 36 company-paid days off per annum

11) Access to educational streaming services like Pluralsight

12) Input on the development of the company

Our core values:

We are open-minded, humble, respectful, self-driven, and honest, which allows us to create an atmosphere of synergy. Our team is a great fit for those who value self-organization and are passionate about personal growth. If this resonates with you, we’d love to have you join the team.

Stack: Golang, AWS, MySQL, Docker, Microservices.

We are seeking an experienced Golang Developer to join our team of talented developers for a stable yet dynamic project.

As the Golang Developer, you will play an integral role in developing, maintaining, and refactoring the existing codebase of a multi-service product with complex logic. You will work closely with our experienced Backend team and use the latest stack.

About the project:

A stable enterprise product for creating marketing presentations, preparing accompanying materials, and developing sales cycle business assistants for global pharmaceutical companies such as AstraZeneca, Novartis, Pfizer, Veeva etc., and financial institutions like ING and Van Lanschot. Completely our code base, we have been developing it since 2015.

Our services are distributed across multiple Availability Zones, adhering to a service-oriented architecture. Since 2018, we have prioritized GraphQL, although we maintain comprehensive support for RESTful APIs. Our core API services are built on a diverse stack of programming languages, each chosen to optimize task performance. This stack includes a rapidly evolving Golang Core API, legacy Core API services in PHP (leveraging frameworks like Laravel and Yii2) for established business logic and data layer interactions, Node.js (utilizing both JavaScript and TypeScript), Python APIs, and .NET Core C# components.

We utilize a hybrid cloud infrastructure, harnessing the strengths of both AWS and GCP to meet our operational needs, and focus on Serverless. Our work also involves extensive integration with API partners, including Veeva, Salesforce, and a variety of others, to ensure a seamless and robust service ecosystem.

As a product with high-security requirements, we undergo regular penetration testing from auditors and client companies to ensure compliance with industry standards such as OWASP, SOC, and ISO.

Essentials:

- Advanced knowledge of Golang, with experience in web frameworks such as Gin or Echo.

- Proficiency in developing automated tests using frameworks like Go Testing, Ginkgo, etc.

- Expertise in performance monitoring, optimization techniques, and troubleshooting.

- Strong knowledge of SQL and an understanding of transactions.

- Understanding of OOP, design patterns, cryptography, algorithms, and data structures.

- Versatility and comprehension of how all aspects of a web project work together (frontend, backend, and the network layer).

- Basic System Design skills.

- English reading and writing: Upper Intermediate.

- English speaking: Lower Intermediate.

Nice-to-haves:

- Development experience with Node.js, PHP.

- Knowledge of serverless architectures, especially AWS.

- Experience in building APIs using REST and GraphQL.

- Understanding of EDA, Microservices, Hexagonal Architecture.

- Proficiency in Docker.

- Experience with CI/CD Pipelines.

- Familiarity with agile methodologies (Scrum, Kanban).

- Degree in Computer Science.

- English speaking: Upper Intermediate.

Benefits:

In addition to a great base salary, we offer:

1) Funding for conferences, co-working spaces, software licenses, and other work-related expenses

2) MacBook if you require one

3) Mobile devices if you are involved with mobile development projects

4) Flexible working hours and fully remote working without micromanagement

5) Modern technology stack

6) Time for open source development

7) Bonus at the end of the year

8) Paid study leave

9) Paid English language courses

10) 36 company-paid days off per annum

11) Access to educational streaming services like Pluralsight

12) Input on the development of the company

Our core values:

We are open-minded, humble, respectful, self-driven, and honest, which allows us to create an atmosphere of synergy. Our team is a great fit for those who value self-organization and are passionate about personal growth. If this resonates with you, we’d love to have you join the team.

Are you a skilled Backend Developer passionate about cutting-edge IoT solutions? We at Sigma Software invite a Middle-level professional to join our team, working on an innovative smart building automation platform. This role offers flexibility — you can work remotely or onsite in Tashkent, Uzbekistan. 

In this position, you will contribute to a project that is actively transforming building management through real-time data, automation, and sustainability-focused solutions. You will work with modern technologies and have the opportunity to influence architecture and integrations. 

Why join us? At Sigma Software, you will be part of a collaborative environment, enjoy challenging tasks, and contribute to impactful projects that make a real difference in energy efficiency worldwide. 

CUSTOMER 
Our Customer is a leading IoT-based building management platform that empowers property owners and technical experts to make data-driven decisions. The solution focuses on real-time monitoring, automation, and sustainability, helping optimize energy usage and operational efficiency. 

PROJECT 
The project leverages smart building automation to translate real-time data into opportunities that align with operational, sustainability, and compliance objectives. As a result, large commercial buildings have achieved up to 30% reduction in energy consumption. 

Job Description

• Design, develop, and maintain backend services using TypeScript and NestJS within a microservices architecture 
• Integrate third-party services and APIs into the platform, ensuring high reliability and performance 
• Work with PostgreSQL, MongoDB, and Redis for efficient data storage and retrieval 
• Collaborate with cross-functional teams to deliver new features for the platform’s new product 
• Participate in the full software development lifecycle, from requirements analysis to deployment and support 
• Support DevOps activities, including CI/CD processes, infrastructure setup, and monitoring 
• Monitor and optimize application performance, scalability, and security 
• Troubleshoot and resolve technical issues 
• Ensure code quality by following best practices and project conventions 
• Contribute to improving team processes and technical documentation 
• Proactively identify and communicate risks, blockers, and improvement opportunities 
• Adapt to changing requirements and priorities 

Qualifications

• At least 2 years of commercial experience in backend development with JavaScript/TypeScript stack 
• Strong experience with Node.js and NestJS 
• Experience integrating third-party services and APIs 
• Proficiency with PostgreSQL, MongoDB, and Redis 
• Familiarity with microservices architecture and messaging systems (RabbitMQ) 
• Upper-Intermediate English level 
• Strong communication and teamwork skills 
• Ability to work proactively and independently 
• Experience collaborating in cross-functional teams 

WILL BE A PLUS

• DevOps experience (Docker, Kubernetes, Terraform) 
• AWS services (EC2, VPC, S3, Step Functions, Lambda, IAM, Cognito) 
• Experience with Grafana, Prometheus, GitHub Actions 
• Knowledge of Kafka, GraphQL, Linux 
• Experience with real-time data processing and/or EV charger integration 

PERSONAL PROFILE

• Strong self-organization skills with efficient task management 
• Ability to prioritize tasks to meet project goals 
• Proactive in identifying and resolving blockers 
• Clear and open communication with team members and stakeholders 
• Transparency in work progress and outcomes 
• Comfortable working in a dynamic environment with evolving requirements 

Senior Java Engineer (high-load product) 

Are you a Java Developer looking for new challenges? 
What about working with a high-profile client with millions of QPS? 
If you have experience developing high-performance distributed systems, this is the perfect opportunity to work on a new digital marketing management platform with a world-renowned client.
 
Project tech stack: 
Concurrency -  a high-load, low-latency system.
Cache: Aerospike, Memcached
Cloud: AWS, GCP
DB: PostgreSQL, Superset
Streams: Kafka, Kinesis
Data formats: Avro, Protobuf
Languages: Java, Scala, Python
 
About the project:
Our client is a leading streaming service based in the United States. With millions of users worldwide, its devices provide easy access to free TV, live news, sports, movies, etc. The client has an advertising business and also licenses its hardware and software to other companies.
 
Location:
Ukraine remote
 
Skills & Experience:
- 4 - 8 years of experience building large-scale and low-latency distributed systems
- B.S. or M.S. degree in Computer Science, Engineering, or equivalent 
- Command of Java or C++
- Solid understanding of algorithms, data structures, performance optimization techniques, object-oriented programming, multi-threading, and real-time programming 
-Self-motivated individual with a high level of accountability and ownership
- Critical thinking and practical decision making
- Can do, results-oriented mindset
 
Will be a plus: 
- Experience with distributed caching, SQL/NoSQL, and other databases is a plus 
- Experience with Big Data and cloud services such as AWS/GCP is a plus
Experience in the advertising domain is a big plus 

 Responsibilities
- Work alongside a highly skilled engineering team to design, develop, and maintain large-scale, highly performing, real-time applications
- Own building features, driving directly with product and other engineering teams 
- Demonstrate excellent communication skills in working with technical and non-technical audiences 
- Be an evangelist for best practices across all functions – developers, QA, and infrastructure/ops 
- Be an evangelist for platform innovation and reuse 
- Deliver top-quality software in a timely fashion 

 

Key Requirements:

- At least 4 years with .net

- At least 2 years of on-hands experience with Umbraco 8 , 9 , 10 versions

- At least B2 English level (C1 will be a HUGE plus)

Key Responsibilities:

* Develop and maintain backend services, APIs, and message-driven integrations.

* Write clean, scalable, and efficient code adhering to coding standards and best practices.

* Participate in the entire application lifecycle, focusing on coding, debugging, testing, and deployment.

* Troubleshoot, debug, and upgrade existing systems to ensure performance, reliability, and security.

We offer:

- Become a part of rapidly growing Ecommerce Agency

- NO russian clients, NO russian colleagues!

- Remote work

- Paid time-off

- Flexible schedule

- Ability for a constant financial and professional growth

About us

An online casino powered by the SoftSwiss platform. The front-end is React-based and integrated with the SoftSwiss game aggregator, cashier module, and player registration. After a redesign, we need skilled developers to take over the project, stabilize it, and later contribute to additional web projects.

We are hiring two part-time/full-time engineers so the system is never dependent on a single person. Both will be cross-trained on the casino platform.

What you’ll do

• Take ownership of the existing React site.
• Audit the codebase, APIs, and deployment.
• Fix critical issues in registration, cashier, and game launch flows.
• Improve security, testing, and monitoring.
• Deliver technical documentation and handover materials.

• Participate in other ongoing projects after the takeover phase.

   

Tech stack & integrations

• Frontend: React (TypeScript)
• Backend: Node.js / Express (Nest.js a plus)
• APIs: SoftSwiss Game Aggregator, Cashier module, Registration/Auth
• DB: PostgreSQL (other SQL is fine)
• Infra: Docker, CI/CD pipelines, cloud hosting

• iGaming integration experience is a PLUS

   

Requirements

• 3+ years as a full-stack developer.
• Strong React + TypeScript skills.
• Solid Node.js backend experience.
• Hands-on experience with third-party API integrations in iGaming is a must.
• Good understanding of authentication, sessions, and secure coding practices.
• Independent and reliable: able to audit, fix, and deliver without supervision.

• English: Upper-Intermediate (enough for tech documentation and communication).

   

We offer

• Remote work on European time zone.
• Competitive salary.
• Dinamic environment.
• Contractor (B2B/freelance) or long-term agreement.
• Initial project: stabilize & document the casino site.

• Ongoing work: participation in new web projects.

   

How to apply

Please send:

• A short intro with relevant experience.
• Links to projects, GitHub, or portfolio (iGaming/fintech/payments experience is a big plus).
• Availability (part-time / hours per week).

About us

Farsight Vision converts flight footage into digital 2D and 3D twins for real-time intelligence in GNSS-denied environment, making analytics and situational awareness convenient and accessible while saving time and effort. We create multi-layered digital twins of terrain with dynamic tracking and object/landscape monitoring and predicting.

As a Senior Python Software Engineer, you will be a core part of our technology team, responsible for building and maintaining the backend infrastructure of the FSV Platform. You will work with cutting-edge technologies, including Python-based frameworks, cloud services, and machine learning operations (MLOps), to develop a platform that processes and analyzes drone data to create 3D models and orthophotos. Your role will involve not only backend development but also basic DevOps tasks and collaboration with frontend teams, making this a dynamic and versatile position.

If you thrive in startup environments, are proactive, and enjoy solving complex problems, this position offers an exciting opportunity to contribute to an innovative platform and grow alongside our ambitious team.

Responsibilities

• Design, develop, and maintain scalable backend services for the platform.
• Implement, deploy, and maintain machine learning algorithms in production environments.
• Work with the frontend team to ensure seamless integration and occasionally contribute to frontend tasks if necessary.
• Work with the platform’s cloud infrastructure, ensuring efficiency, scalability, and reliability.
• Actively engage in solving platform issues, optimizing processes, and contributing innovative solutions.
• Stay updated with new backend, cloud, and ML technologies, and quickly adapt to new protocols or tools as required.

Requirements

• 5+ years of experience in Software Development.
• Proficiency with Python (3+ years) and frameworks such as Django, Flask, etc.
• Proven experience in implementing ML algorithms in production environments.
• Previous experience working in a fast-paced startup environment.
• Solid understanding of AWS or similar cloud platforms.
• Basic experience with frontend frameworks, such as React. Ability to assemble a simple project independently.
• Familiarity with DevOps principles, capable of deploying models when needed, and managing environments.
• A strong sense of initiative and self-drive to rapidly acquire, understand, and effectively implement new technologies, protocols, and frameworks to meet project needs and challenges.
• Education: Bachelor’s degree in Mathematics, Physics, Computer Science, or related field.

Why us

• With us, you will become part of a team of professionals who strive to contribute to the development of advanced technologies.
• We value teamwork and create an atmosphere of mutual support where everyone can unleash their potential.
• Flexible work schedule.
• Paid vacation and sick days.

Hiring process

• Test Task.
• Technical Interview.
• PM & C-level management Interview.

We are looking for a skillful Senior Full-Stack .NET Engineer. A perfect candidate must be able to adjust to constant business change. Common types of changes include new requirements, evolving goals and strategies, and emerging technologies.
 

About the client:

Founded in 1948, Fluke Corporation is a huge US-based enterprise with over 2,500 employees. It is a world leader in compact, professional electronic test tools, and software for measuring and condition monitoring.

We are collaborating on the solutions for the mobile operation, control, and maintenance of automated systems. The company’s products are designed for environments where downtime is a critical issue such as airports, warehouses, distribution centers, manufacturing operations, power stations, water treatment facilities, or renewable energy farms. The solutions are used by global leaders in manufacturing, airport operations, and logistics, such as Honda North America, Toyota UK, Volkswagen, Boston Logan Airport, Allessa Chemie, Zalando, Baur, Brillux, as well as many airports in Europe.

X5 eMaint - A CMMS software solution that centralizes maintenance information, facilitates processes, and automates some tasks to improve efficiency. Computerized maintenance management system software optimizes the use, availability, and life span of equipment, machinery, fleets, infrastructures, facilities, or operations
 

Requirements:

• At least 5 years of experience in software development projects. 
• Experience in working with big enterprise project
• Experience with implementing enterprise cloud native solutions in AWS (preferred) or MS Azure. 
• Experience in designing and developing asynchronous message-driven micro services with experience in RabbitMQ or similar. 
• Good knowledge in Relational and Non Relational DB design. 
• Good knowledge in functional and/or object-oriented software design and  domain-driven design (desired) using .NET and C#.  
• Experience in designing and developing user interfaces with React.js, TypeScript (desired) and CSS/Sass. 
• Practical knowledge designing RESTful and GraphQL (desired) API. 
• Good knowledge in Continuous integration and delivery best practices. 
• Upper-intermediate level of English (both oral and written)
   

Nice to have:

• Experience collaborating with UX and Product  
• Experience and passion for developing visually polished, engaging and fluid interfaces.
• Excellent problem-solving and collaboration skills.  
• Great written, verbal, technical and  interpersonal communications skills. 
   

Responsibilities:

• Design and implement complex, scalable, and maintainable full-stack solutions that  align with business goals.  
• Provide technical leadership, mentoring, and guidance to a team of developers, fostering a culture of continuous learning  and improvement. 
• Write efficient, testable, and maintainable code. 
• Drive initiatives to improve development  processes, automation, and overall team efficiency. 
• Troubleshoot and resolve technical issues, identifying root causes and implementing effective solutions. 
• Collaborate with stakeholders across the company including engineering, product,  support, and marketing to launch new features.
• Product development within Fluke Reliability is  an internationally distributed and diverse  organization. We embrace a culture of  innovation, continuous improvement, and individual empowerment to provide an  environment where individuals can grow and thrive.

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.

Smart-UI - full-stack development company 0 is looking for a Backend Developer (Node.js) to join our team and work on long-term projects (including e-commerce and marketplace platforms).

What you’ll be working on

• Development of backend services using Node.js / NestJS
• Building APIs and integrations
• Working with databases and high-load systems
• Payment system integrations (Stripe, PayPal)
• Participation in architecture decisions and system design

Tech Stack

• Node.js (NestJS preferred)
• PostgreSQL
• Redis

Requirements

• Strong experience with Node.js
• Experience with NestJS (or similar frameworks)
• Solid knowledge of REST API design
• Experience with PostgreSQL
• Understanding of Clean Architecture / DDD (big plus)

Nice to have

• Experience with Stripe / PayPal integrations
• Experience with e-commerce or marketplace projects
• Experience with WebSockets / real-time systems
• Experience with deployment (Docker, CI/CD, cloud)
• Experience working with scalable/high-load systems

What we offer

• Long-term projects (not short freelance tasks)
• Stable workload
• Opportunity to grow into a senior/lead role
• Flexible working format (remote)

Important

We’re looking for someone who:

• can take ownership
• understands architecture, not just coding
• can work in a team and communicate clearly

Position 1

We are looking for a Mid-to-Senior Java Engineer who actively uses AI coding tools (such as Claude, Gemini, GitHub Copilot, Cursor, or similar LLMs) to speed up software development. The client is specifically interested in engineers who have already integrated AI-assisted workflows into their daily practice - not those who are just curious about it.

Location

To be confirmed. Candidates from EU countries preferred.

No RF/RB

Main requirements

- 5 - 6 years of Java development experience

- Hands-on experience with LLM-based coding tools (Claude, Gemini, GitHub Copilot, Cursor, or similar)

- Strong software engineering fundamentals - architecture, clean code, testing

- Ability to work independently and deliver with minimal supervision

- Good English communication skills (B2 and higher)

Key responsibilities

Design, develop, and deliver Java-based solutions using AI-augmented workflows

Apply LLM tooling effectively to accelerate development cycles

Write clean, maintainable, well-tested code

Collaborate with team members and stakeholders on delivery

Share AI tooling best practices within the team

Position 2

Java Springboot Developer

Title: Java SpringBoot developer

Duration : 7+ Months Contract

Location: 100% Remote.

Role Overview: Works with moderate work direction and can identify issues/problems but may need assistance in resolving.

Plans, designs, develops, codes and tests software systems or applications for software enhancements and new products.

Responsibilities :

Revises and refines systems as required. Participates in the devising of project timelines, implementation design specifications, system flow diagrams, documentation.

Involved in testing and ongoing support of business systems.

Develops and maintains operational and system level documentation.

Must be able to apply SDLC concepts and have a proven track record of delivering solid, robust applications.

Has two primary responsibilities:

As a Java Spring Boot developer with knowledge of Python, Concurrency Programming, Microservices and Test-Driven Development.

Must have good understanding of CI/CD processes.

As an Operations Engineer with good grasp of Linux fundamentals and Shell Programming with knowledge of deployment tools like Terraform, Ansible, Docker and Kubernetes.

The role involves 50% or each of the above.

Good to have: Cloud experience, AI development.

Project description

Join a Team Redefining Modern Banking Technology!
Our client is a Swiss bank focused on delivering advanced online trading and financial services. Unlike traditional financial institutions heavily dependent on legacy systems, this bank invests in a lean, modern, and continuously evolving technology stack.
What the Project Is About
The project focuses on building and evolving a large‑scale trading platform used by a wide range of clients - from private investors to active traders.
The platform enables:
* Trading across multiple financial instruments: Shares, ETFs, Options, Futures, Funds, Bonds, CFDs
* Support for complex order types: Market, Limit, FoK, OCO, Trailing, and more
* Order Routing Systems (ORS) that intelligently route trades to the correct broker and marketplace
* FIX‑based integrations with multiple brokers and exchanges
* Direct connectivity and maintenance for key markets: SIX, Eurex, Bern, Scoach
* Tools for internal Derivatives teams to manually manage and recover orders when needed
* Accurate commission calculation and management per order

The platform is business‑critical and operates under strict performance, reliability, and correctness requirements, serving as the backbone of the client's trading ecosystem.

Technology & Engineering Culture
We continuously evolve our systems toward:
* Atomic, independently deployable microservices
* Self‑contained applications with clear ownership
* Dockerized environments
* Automated CI/CD pipelines
Engineering decisions focus on reliability, transparency, and scalability, supporting business‑critical banking systems.
How We Work
Scrum teams of 7-8 cross‑functional engineers. Each team member contributes to both backend and frontend components.
Daily collaboration with client stakeholders through:
* Stand‑ups
* Refinement and design sessions
* Status and planning meetings
Agile best practices applied across delivery
Primary communication tools:
* Microsoft Teams
* Outlook and internal collaboration platforms

What We Offer
+ Professional growth
Local trainings, workshops, and on‑demand webinars
Company‑funded conferences and certifications
+ Competitive compensation
Annual review based on performance and professional development
+ Healthy work-life balance
Team buildings and corporate events
Hackathons and innovation initiatives
A culture that values sustainable delivery

If you are proactive, creative, and motivated by building robust banking systems with real business impact, you will contribute directly to improving both product quality and engineering practices.
Join us and help shape modern banking solutions.

Responsibilities

Design and develop complex product features end‑to‑end, covering frontend, backend, and data layer

Take ownership of larger functional areas or services, ensuring their reliability, performance, and scalability

Contribute to technical design and architectural decisions, including evaluation of trade‑offs and long‑term impact

Develop reusable, maintainable, and well‑tested code following team standards and best practices

Write and maintain unit, integration, and E2E tests to ensure system stability and confident releases

Lead and moderate code reviews, set quality standards, and support the team in complex technical cases

Collaborate with other engineers, product managers, and other stakeholders to shape technical solutions from vague or evolving requirements

Take responsibility for features from early discovery and solution design to production rollout and post‑release support

Identify, prioritize, and systematically reduce technical debt across the codebase, not limited to owned features

Mentor and coach less experienced engineers, supporting their technical and professional growth

Actively participate in Scrum events and client communication, contributing not only status but technical insights and recommendations

Participate in hiring activities, including technical interviews and candidate assessment

Skills

Must have

At least 5 years of recent, proven experience working with Java in a Software Developer/Engineer role

Strong knowledge of Java (11+), core concepts, and modern language features

Solid understanding of OOP/OOD principles and design patterns

Experience with microservices architecture: design, implementation, support, and evolution

Spring Framework (Spring Boot, Spring MVC, Spring Data/JPA)

Design and implementation of RESTful APIs

Unit testing frameworks (JUnit, TestNG, Mockito)

SQL and experience with relational databases (PostgreSQL or Oracle is a plus)

Experience with Git or other distributed version control systems

Understanding of containerization (Docker); CI/CD experience is a plus

Willingness and readiness to work with ReactJS, Redux, TypeScript, HTML, and CSS from day one, with the ability to quickly acquire and apply these skills in daily development

Nice to have

Bachelor's or Master's degree in Computer Science, Computer Engineering, or a related field

Experience working in finance or banking domain (enterprise‑scale systems, regulated environments is a plus)

Experience working in Unix/Linux environments

Hands‑on experience with ReactJS, Redux, TypeScript, HTML, and CSS (not required, but will significantly speed up onboarding)

Languages

Ukrainian: C2 Proficient,

English: B2 Upper Intermediate

On behalf with our customer we are seeking for FS Node Team Lead to join our global R&D department in Poland.

Our customer is an innovative technology company led by data scientists and engineers devoted to mobile app growth. Their proprietary ad platforms powered by machine learning are the outcome of that devotion.
They reward talents, employees support each other to advance individually and as a team.

Responsibilities

● Design, code, and manage large scale, highly available, real-time (low latency) services using cutting edge technologies (Node.js, React, Redis, Kubernetes, etc. over AWS).
● Lead and mentor a team of around 4 members, abroad, and performing code reviews to other team members.
● Work with stakeholders including the Executive, Product, Data, and Design teams to craft the most optimal solutions for our problems.
● Design and develop APIs or integrate with 3rd party APIs
● Manage a time-efficient sprint plan. Plan, groom and manage the present sprint and the upcoming ones with Product
● Understand and implement security and data protection needs, and assist in-house teams and supply creative solutions for various problems.

Requirements

● 6+ years of coding experience in Backend NodeJS 
● 2+ years of management experience
● Working knowledge with SQL and NoSQL databases
● Working with one of the cloud providers: AWS, Google, Microsoft
● Experience with Kubernetes
● Experience in the software life cycle and knowing how to work in an agile environment
● Can-do attitude, self-sufficient, capable of learning alone and good English


What We Offer

● Working schedule Sunday-Thursday - must have
● Accounting support & consultation
● Opportunities for learning and developing on the project
● 20 working days of annual vacation
● 5 days paid sick leaves/days off; state holidays
● Provide working equipment