Jobs Java

N-iX is looking for a Senior Java Engineer (with Go/Python) to join a collaborative product team of around 8 engineers working on a complex, high-impact software platform. 

You’ll contribute across the stack, building scalable backend services and intuitive frontend experiences, while actively using AI-powered development tools to improve productivity and code quality. The team follows Agile best practices, values clean architecture, ownership, and continuous improvement. As an engineer, you’ll help to develop the platform that serves as an enterprise next-generation endpoint protection (EPP) + endpoint detection & response (EDR) solution that runs on Windows (as well as macOS, Linux, servers, etc.). It comes as a single, unified agent designed to prevent, detect, respond, and remediate cyber threats, including malware, ransomware, fileless attacks, and advanced persistent threats — all in real time.

Responsibilities:

• Design, develop, and maintain backend services
• Collaborate closely with backend, frontend, and QA engineers in an Agile/Scrum environment
• Write clean, testable, and well-documented code
• Integrate and work with APIs, data stores, and third-party services
• Use AI-assisted development tools (e.g., code assistants, testing tools, analysis tools) to improve delivery speed and quality
• Support production systems and participate in troubleshooting when needed

Requirements: 

• 5+ years of extensive software engineering experience
• Proficiency in Java
• Proven expertise in developing large-scale distributed systems and microservices architecture, with a focus on performance, scalability, and reliability
• Experience with cloud platforms (AWS and/or GCP) and Kubernetes (must)
• Experience with Kafka or similar solutions 
• Experience with Python or Go is nice to have. 
• Excellent problem-solving skills
• Strong communication skills and ability to articulate technical concepts and influence engineering direction across teams, departments, and stakeholders
• Upper-intermediate level English 

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 

 

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

🚀 Project Description

We are building an MVP for a digital planning platform.
 

The platform will allow doctors to upload 3D dental scans, run ML-powered processing, and use the results inside a planning workflow

From the engineering side, this role is focused on Backend + DevOps / MLOps, with strong ownership over the technical foundation of the product. 

The main goal is to create a reliable environment for deploying and serving ML models, building processing pipelines, exposing APIs, and using AI Tools for maximum productivity.
 

✅ You are:
 

• Have practical experience from commercial projects, pet projects, hackathons, or open-source contributions
• Confident with Python or Java, with readiness to work close to ML workloads and model-serving pipelines
• Comfortable building backend services and REST APIs
• Understand system design, asynchronous processing, and service integration
• Have experience with Docker and deploying services in cloud environments
• Understand how to build and maintain CI/CD pipelines
• Have hands-on experience with AWS or similar cloud platforms
• Are comfortable working with PostgreSQL
• Can design and implement backend components that interact with ML models
• Understand logging, monitoring, environment setup, and deployment workflows
   

➕ Will be a plus:
 

• Experience with MLOps or model-serving infrastructure
• Experience deploying ML models for inference on CPU
• Familiarity with FastAPI, Spring Boot, or similar backend frameworks
• Experience with AWS services
• Understanding of job queues, background workers, and long-running processing workflows
• Experience with 3D, computer vision, or scan-processing products
• Familiarity with infrastructure-as-code tools such as Terraform
• Comfortable working with AI platforms and developer tools such as Cursor, Claude Code, or Codex
   

♟️ What We Expect from You:
 

• Use modern AI tools, frameworks, and approaches to work faster and more effectively
• Make practical decisions that help us launch faster without unnecessary overengineering
• Proactively identify bottlenecks, propose solutions, and help shape technical decisions
• Be comfortable working in an evolving product with changing priorities and early-stage ambiguity
   

🔑 Responsibilities:
 

• Implement and enhance backend services for the MVP
• Create the initial cloud environment for development, testing, and production
• Set up and maintain deployment pipelines
• Deploy and serve ML models on CPU-based infrastructure
• Build and support processing pipelines for model execution and result delivery
• Work closely with the ML engineer to integrate segmentation, alignment, and other model outputs into the platform
• Configure logging, monitoring, and basic operational observability
• Ensure the system is reliable, maintainable, and easy to extend
• Utilize AI to review pull requests and contribute to engineering best practices
   

🍩 What we offer:
 

• Opportunity to work on an innovative product in the medical-tech domain
• High ownership and direct impact on product architecture
• Flexible work hours within the European time zone
• A fast-moving environment where strong engineers can influence product and technical decisions
• Paid 200$+ AI assistants and modern engineering tooling
• Professional development support, latest courses and certifications
• 20 business days of vacation
• 5 sick leave days
• National holidays covered
   

🗣 Recruitment process:
 

✔️ Culture Fit Interview → ☑️ Technical Task → ✅ Follow-Up Interview → 🏁 Final Technical Interview

Job Description

Willingness to start your career in the IT industry
Basic knowledge of operating systems (Windows and Linux), computer network systems
Knowledge of fundamentals of Java programming language
Technical curiosity and interest in programming
Good knowledge of English (written and spoken)
Positive and open-minded attitude, communicativeness

Telecom domain knowledge

Job Responsibilities

Support operation of services in production

New features design and implementation

Defect investigation, bug fixing, troubleshooting

Unit and functional testing

Following design and coding standards accepted in the team

Interact with project management, other engineering teams, and other stakeholders as appropriate

Department/Project Description

We are seeking a highly motivated trainee Java Engineer to join our team and contribute to the development for a leading telecommunications provider

• 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

   

• Mandatory Skills Description:

  - 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

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

Mandatory Skills Description:

- 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 Skills Description:

- 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:

English: B2 Upper Intermediate

• 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

• Mandatory Skills Description:

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

  - 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
  - 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
   

• Nice-to-Have Skills Description:

  - 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:
  • English: B2 Upper Intermediate
  • Ukrainian: C2 Proficient

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

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

 

• 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

• Mandatory Skills Description:

  - 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

🚀AIMPROSOFT — OMS Developer (Fluent Commerce / CommerceTools)!   

Aimprosoft, a fast-growing IT company, is looking for a OMS Developer (Fluent Commerce / CommerceTools) on a contract basis for a long-term international project in the E-Commerce / Marketplace domain.  

This is a senior hands-on role for a specialist who can help implement and configure order management processes in Fluent Commerce, challenge solution flows when needed, and support a complex integration landscape involving CommerceTools, Boomi, and Mirakl.  

The project is currently in the discovery phase, with implementation for first stage expected to run from May to November 2026, then will be longation.  

🎯About the project & role:   

Your mission will be to help the team turn the discovery outputs, architecture flows, and vendor recommendations into a working Fluent Commerce setup.  

The target landscape includes:  

• CommerceTools as the commerce platform  
• Fluent Commerce as the OMS  
• Boomi as the integration / orchestration layer  
• Mirakl for marketplace flows and seller-related processes  

You will not be expected to own the whole business analysis or solution architecture from scratch, but you should be senior enough to:  

• understand and challenge proposed process flows  
• suggest improvements based on real Fluent Commerce project experience  
• implement configurations and processes in Fluent Commerce  
• support end-to-end validation and testing of OMS-related flows  
• collaborate closely with integration and commerce teams  

🔥What We Need From You:   

• Hands-on experience with CommerceTools    
• Background in Java-based backend ecosystems  
• Experience working with GraphQL-based integrations  
• Experience as a Senior Developer / Senior Consultant / Implementation Engineer in OMS-related projects  
• Proven participation in at least a couple of non-trivial commercial projects  
• Understanding of Order Management Systems (OMS) and order lifecycle processes  
• Experience configuring and implementing business rules, workflows, and process flows in Fluent Commerce  
• Ability to review business / solution flows and provide meaningful feedback based on platform best practices  
• Experience working in integrated commerce ecosystems  
• Good understanding of commerce platform integrations  
• Practical understanding of API-based integrations  
• Ability to support testing, troubleshooting, and flow adjustments during implementation  
• Solid communication skills and ability to work in collaboration with architects, BAs, PMs, and external vendor teams  

• English: Upper-Intermediate (B2) or higher for communication with international teams.   

   

📌Nice to have:   

• Hands-on experience with Fluent Commerce 
• Experience with Boomi, MuleSoft, or similar middleware / iPaaS platforms  
• Experience integrating OMS with CommerceTools  
• Experience with Mirakl or marketplace-related integrations  
• Experience in marketplace, drop-shipping, omnichannel, or multi-seller order flows  
• Experience in retail or enterprise e-commerce projects  
• Previous collaboration with vendor professional services teams  

• Bachelor’s or Master’s degree in Computer Science or related field.   

   

💼What We Offer:   

• Official military deferment (reservation)
• A competitive salary that appreciates your skills and experience   
• Cozy atmosphere and modern approaches. We have neither bureaucracy nor strict management nor “working under pressure” conditions   
• Opportunity to implement your ideas, tools, and approaches. We are open to changes and suggestions aimed at improvement   
• Work on a strategic, large-scale international project with high visibility.   
• Remote-friendly culture with strong team collaboration.   

We are looking for a Senior Java Developer to join a product company building a large-scale live-streaming platform in Warsaw.

This is a successful B2C mobile product with 450+ million registered users, connecting creators with their fans around the world and helping them monetize their content.

The company was founded in the USA in 2018 and is powered by 350+ employees globally.

What they offer:

• Stock options grant (Silicon Valley company)
• Competitive salary
• Flexible working hours
• In-office format — like the good old days :)
• Medical insurance for you and 75% coverage for your relatives
• Free lunches
• Parking
• Multisport card

• Cheerful team spirit and a fun office atmosphere

   

Tech stack: Java 17–21, Spring Boot, Kafka, Kubernetes, Aerospike, Redis, GCP

Requirements:

• strong commercial experience with Java
• solid hands-on experience with Spring
• experience with message brokers
• good understanding of microservices architecture
• practical experience with cloud platforms

Our client is a global leader in infrastructure software, specializing in enterprise API management and digital integration.

They are looking for a strong Senior Java Developer to help build and scale a cloud-native platform powering modern API ecosystems.

About the Position:

We are hiring a Senior Java Developer to contribute to the design and development of a high-load, distributed platform focused on API orchestration and integration.

You’ll work on microservices, cloud infrastructure, and platform components, while collaborating with cross-functional teams and mentoring junior engineers.

Working Hours:

Aligned with Ireland timezone (GMT/IST)

Responsibilities:

• Design and develop backend services and APIs using Java
• Build and enhance microservices and platform components (API gateways, data layers)
• Contribute to architecture decisions and system design
• Work within Kubernetes and containerized environments
• Ensure code quality, testing, and best engineering practices
• Collaborate with QA/SDETs on test automation and coverage
• Participate in code reviews and technical discussions
• Monitor system performance using observability tools (Prometheus, Grafana, OpenTelemetry)
• Identify bottlenecks and optimize system performance and scalability
• Mentor junior engineers and support team growth

Requirements:

• 5+ years of experience in backend/platform engineering
• Strong proficiency in Java (mandatory)
• Experience with distributed systems and microservices
• Solid understanding of:
  • Multithreading, memory management, performance tuning
  • API design (REST, gRPC) and integration patterns
• Hands-on experience with:
  • Redis/Valkey, MongoDB, PostgreSQL
  • Kubernetes and containerization
  • Cloud-native environments
• Experience with monitoring & observability tools
• Strong debugging, problem-solving, and communication skills
• Experience working in Agile teams
• Mentoring experience is a plus

Benefits:

• 100% Remote
• Competitive USD compensation
• Flexible working hours
• Home office setup provided
• Work in a global, product-driven environment

Join the team and build scalable systems powering modern digital ecosystems!

Our client is a global leader in infrastructure software, specializing in enterprise API management and digital integration.

They are looking for a strong technical leader to drive the development of high-load platform solutions and shape the future of their core product.

About the Position:

We are hiring a Java Technical Lead to take ownership of architecture and delivery within a fast-paced platform engineering team.

This is a hands-on leadership role, combining coding, system design, and team leadership to build scalable, cloud-native solutions.

Responsibilities:

• Lead the design and development of distributed systems and platform services using Java
• Define and drive architecture decisions across APIs, microservices, and data layers
• Ensure best practices in performance, scalability, and system reliability
• Collaborate with Product, DevOps, and QA to deliver high-impact features
• Mentor engineers and grow a high-performing Agile team
• Drive code quality, CI/CD, and engineering standards
• Contribute to hiring and scaling the engineering team
• Identify technical risks and proactively solve complex challenges

Requirements:

• 8+ years of experience in software development
• 2+ years in a Tech Lead / Team Lead role
• Strong expertise in Java (mandatory)
• Experience with microservices and distributed systems
• Solid knowledge of API design and integration patterns
• Hands-on experience with:
  • Kubernetes / containerization
  • Cloud environments
  • PostgreSQL, MongoDB, Redis/Valkey
• Experience with CI/CD, test automation, and observability
• Strong leadership, communication, and problem-solving skills

• Agile/Scrum experience

   

  Working Hours: This role operates according to Ireland timezone (GMT/IST) business hours.

   

Benefits:

• Fully Remote: Work from anywhere in a global team
• Competitive Pay: USD compensation package
• Flexible Schedule: Work-life balance supported
• Home Office Support: Equipment provided

Join our team! Build scalable systems used by global enterprises.

We're building a modern SaaS application and seeking a Middle Java Backend Engineer to join our growing team. You'll play a role in architecting and developing our API infrastructure, business functionality, debugging of the Java services and Database design

Required:

• 3+ years of commercial Java development experience
• Strong expertise in building and maintaining production-grade REST APIs
• Proficient with Spring Boot or equivalent frameworks (Google Guice, Vert.x)
• Solid SQL knowledge and relational database experience (MySQL, OracleDB or any other SQL DB)
• Comprehensive testing practices using JUnit and Mockito
• Deep understanding of API design principles, RESTful patterns, and best practices
• Ability to work independently and take ownership of features end-to-end

Strong Advantage:

• DevOps skills with practical experience in infrastructure deployment and automation
• Production experience with AWS services (ECS Fargate, ECR, CloudWatch, VPC, IAM)
• CI/CD pipeline implementation (GitHub Actions, Jenkins, GitLab CI)
• Infrastructure as Code experience (Terraform, AWS CloudFormation, CDK)
• Docker containerization and orchestration
• Elasticsearch for search and analytics
• Experience with distributed systems and async processing

What You'll Do:

• Architect and develop scalable, maintainable REST APIs
• Build robust backend services for our SaaS platform
• Design database schemas and optimize query performance
• Write comprehensive unit, integration, and API tests
• Participate in infrastructure planning, setup, and deployment
• Contribute to architectural decisions and technical roadmap
• Possibly mentor junior developers and conduct code reviews
• Ensure code quality, security, and performance standards

Nice to Have:

• Microservices architecture and domain-driven design experience
• AWS DocumentDB or MongoDB Atlas in production environments
• Message queuing systems (RabbitMQ, AWS SQS, Kafka)
• Monitoring and observability tools (Prometheus, Grafana, ELK stack)
• API security best practices (OAuth2, JWT, API Gateway)
• Performance optimization and profiling experience

What We Offer:

The opportunity to work on a product from the ground up, influence architectural decisions, and grow with the platform as it scales.

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

- Develop high-quality Java microservices using Spring Boot.
- Build Kafka producers, consumers, and stream-processing apps.
- Design event-driven architectures with reliability and performance.
- Implement service resiliency patterns such as retries and circuit breakers. - Collaborate on distributed system design and integration.

• Ensure logging, tracing, and monitoring of backend services.

• Support performance tuning and root cause analysis.

   

• Skills
  - Strong in Java, Spring Boot, microservices patterns.
  - Hands-on Kafka development—streams, partitions, consumer groups. - Knowledge of distributed systems architecture.
  - Familiarity with Docker, cloud-native packaging.
  - Experience in REST APIs, schema evolution, and contracts.
  - Understanding of observability (logs, metrics, traces).
  - Good debugging and performance optimization skills.

For this role the client requires the candidate to have been based in Poland for 2+ years