Jobs Java

🚀 Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.

📍About the Product:
Over the past few years Coro has received $275M in funding and is one of the fastest growing Cybersecurity companies in the world. The funding is primarily being used to enhance the Coro Cybersecurity SaaS platform and for additional headcount growth, as Coro continues to expand globally.   

Coro started in Tel-Aviv, Israel and is also headquartered in Chicago, IL with additional offices in New York, London, and remotely across the globe. As a global organization, Coro gives you the ability to work with people and teammates from around the world. 

Coro’s AI enabled Modular Cybersecurity Platform is the only one in the industry specifically designed to provide Mid-Market customers with scalable and affordable “enterprise grade” protection for all of their priority threat vectors. 

About the Role:
This is a hands-on leadership role for a Backend Team Lead who will guide a team of backend engineers while staying directly involved in coding, architecture, and delivery. You will work on core backend systems behind Coro’s cybersecurity platform, building and scaling high-load services that process large volumes of security and telemetry data in real time.

These systems are responsible for collecting, processing, and analyzing data from multiple sources, including endpoints, cloud environments, and product integrations. They support critical product capabilities such as threat detection, security analytics, anomaly identification, and automated response workflows, making this a mission-critical leadership role at the core of Coro’s product.
 

If you are looking for a role where you can combine leadership with technical ownership, shape team culture, and build highly scalable backend services for a fast-growing global cybersecurity platform, this is the role for you

📍Key Responsibilities:

• Lead a team of highly skilled and passionate developers
• Partner with the Product Manager to build the road-map for the team
• Understand the team objectives and key results and make sure that the team are on the path to achieving them
• Participate in making decisions on the architecture and technologies
• Conduct the team ceremonies: Daily stand-ups, sprint planning and retro meetings
• Help create and enforce strong engineering standards, code quality, and best Engineering practices
• Take an active part in the implementation (hands-on) of the team’s various services and features
• Help your team members grow by mentoring them, building their growth plan with them and enable them opportunities to implement it

📍Required Competence and Skills:

• 6+ years of backend/server-side development with Java
• 2+ years of proven experience leading an engineering team 
• Strong hands-on experience with Spring Framework and MongoDB
• Deep understanding of multithreading and concurrency
• Solid knowledge of OOP concepts and design patterns
• Proven experience with microservices architecture
• Experience working with high-load backend systems
• Proficiency in cloud-native environments (preferably AWS)

Nice to have:

• Experience with Redis and RabbitMQ
• Experience with Elasticsearch/OpenSearch 
• Familiarity with Docker / Kubernetes
• Experience in Cybersecurity domain 

Why Us?

We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

We provide full accounting and legal support in all countries we operate.

We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

We offer a highly competitive package with yearly performance and compensation reviews.

We’re looking for a curious Junior Java Developer who enjoys solving problems, thinks analytically, and isn’t afraid to work independently. If you communicate clearly, love learning new things, and want to build real products used by travelers around the world — we’d love to meet you.

Must have:

• Java 17+, confident understanding of OOP, collections, and exceptions
• Basic knowledge of Spring Boot (Web, configuration, simple services)
• Understanding of REST, HTTP, JSON/XML
• Ability to work with Maven and Git
• Basic SQL queries
• Hands-on experience with APIs and integrations
  - Ability to read third-party documentation
  - Experience using Postman
  - Log analysis
• English proficiency — Intermediate

Would be a plus:

• Experience working with any external APIs
• Basic understanding of testing (JUnit/Mockito)

Crutial Skills:

• Analytical Skills & Independence

  - Ability to understand requirements before starting work

  - Willingness to conduct basic independent research: logs, documentation, hypotheses

  - Ability to ask clarifying questions when something is unclear

  - Ability to use AI tools to speed up research and analysis, with mandatory validation of results.

• Communication & Responsibility

  - Clear status updates: what has been done, what has been researched, next steps

  - Willingness to take responsibility for assigned tasks

   - Ability to provide basic time/effort estimates

We offer

• Highly-qualified TechLead to support your growth 
• competitive salary and bonuses
• an opportunity to work on interesting projects with a team of experts
• professional and personal growth through the company’s encouraging program
• feedbacks from supervisors and team members on a regular basis
• flexible working hours to provide you with life-work balance
• flexible vacation policy
• paid sick leaves
• English/Psychology classes
• training programs
• team buildings and corporate events (check our Instagram profile for details)

Ajax Systems is an international technological company and Europe’s largest security system manufacturer. In addition, the company offers solutions for video surveillance, smart homes, fire detection, and flood prevention. The product portfolio includes 280 wireless and wired devices for security and automation. Today, Ajax protects over 4.5 million users in 187 countries worldwide. 

We are looking for a smart, experienced, and technically proficient Senior Java Developer to join our team in Kyiv office.

Required Experience:

- Java: 5+ years of professional backend development in enterprise environment
- Kotlin: Knowledge and practical work experience
- Java Concurrency: Strong understanding and practical application experience

Architecture & Design
- Understanding of SOA, microservice, and event-driven architecture
- Cloud development principles with practical AWS experience
- Ability to scale and ensure high availability of loaded systems

Technologies & Tools

Required:

- Kafka, MongoDB, NATS
- Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
- Docker and Kubernetes (containerized applications)
- Git, Gradle, Jenkins
 

Nice to Have:
- Redis, Netty, Akka, gRPC, Project Reactor
 

We offer:
- The opportunity to share and implement your own ideas that could impact products and production
- Work with a motivated team and an environment with a zero-bullshit culture
- Competitive salary
- Medical insurance
- Corporate English classes

Location: Warsaw!
Start: as soon as possible
Duration: long-term
Languages: Polish is mandatory !! English: B2

Project domain: telecommunication

Hybrid: 1-2x week in Warsaw | 5+ years Java exp | English B2+
 

• Backend Core: Expert-level Java 21+ (Virtual Threads, Records) and Spring Boot 3.x production proficiency.
• Reactive & Security: Spring WebFlux/WebClient for non-blocking I/O; Spring Security with OAuth2/JWT validation.
• Event-Driven Architecture: Designing high-scale ecosystems with eventual consistency, idempotency, and process orchestration.
• Migration Leadership: Leading domain-specific transitions from Java to Node.js/TypeScript (Key Differentiator).
• API Design: Contract-first development with OpenAPI 3.x and automated client generation.
• Database & State: Spring Data MongoDB (document modeling) and distributed state handling with Redis/Caffeine.
• Observability: Micrometer, Prometheus, and OpenTelemetry for distributed tracing and post-mortem analysis.
• Resilience: Advanced Resilience4j implementation (retries, backoffs, rate limiting, and graceful degradation).
• Testing & Tooling: Spock/Groovy (BDD), WireMock, and Maven multi-module management.

• 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
  It's a business‑critical set of applications and shared libraries responsible for managing financial reference data used by internal development and operations teams.
  The solutions focus on:
  * Retrieving reference data from multiple external providers
  * Processing, validating, and normalizing incoming data
  * Persisting data in relational databases with strong integrity requirements
  * Exposing reliable APIs and reusable libraries for internal systems
  
  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 4 cross‑functional engineers. Each team member contributes to both backend and frontend components.
  
  We collaborate daily with the client's engineers (4-5 people) and follow Agile best practices, and operate as one integrated team.
  
  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 product features end‑to‑end, covering frontend, backend, and data layer
  * Develop reusable, maintainable, and well‑tested code following team standards and best practices
  * Write and maintain unit, integration, and E2E tests to ensure reliability and scalability
  * Participate in code reviews, provide constructive feedback, and improve overall code quality
  * Collaborate with other engineers to clarify requirements and propose technical solutions
  * Take ownership of assigned features from requirements refinement to production deployment
  * Actively participate in Scrum events (planning, refinement, reviews, retrospectives), including direct communication with the client
  * Identify and address technical debt within owned areas of the codebase
  * Communicate with business stakeholders and external data providers to clarify requirements and resolve delivery issues
   

• Mandatory Skills Description:

  - At least 3 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 unit testing frameworks (JUnit, Mockito)
  - Experience with the Spring Framework (IoC, Dependency Injection)
  - Experience developing RESTful services
  - SQL knowledge and experience with relational databases (PostgreSQL or Oracle is a plus)
  - Hands-on experience with ORM frameworks, preferably Hibernate
  - Experience with Git or other distributed version control systems
  - Understanding of containerization (Docker); CI/CD experience is a plus
  
  - Confident working with Unix/Linux environments
  
  - 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
It's a business‑critical set of applications and shared libraries responsible for managing financial reference data used by internal development and operations teams.
The solutions focus on:
* Retrieving reference data from multiple external providers
* Processing, validating, and normalizing incoming data
* Persisting data in relational databases with strong integrity requirements
* Exposing reliable APIs and reusable libraries for internal systems

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 4 cross‑functional engineers. Each team member contributes to both backend and frontend components.

We collaborate daily with the client's engineers (4-5 people) and follow Agile best practices, and operate as one integrated team.

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 product features end‑to‑end, covering frontend, backend, and data layer
* Develop reusable, maintainable, and well‑tested code following team standards and best practices
* Write and maintain unit, integration, and E2E tests to ensure reliability and scalability
* Participate in code reviews, provide constructive feedback, and improve overall code quality
* Collaborate with other engineers to clarify requirements and propose technical solutions
* Take ownership of assigned features from requirements refinement to production deployment
* Actively participate in Scrum events (planning, refinement, reviews, retrospectives), including direct communication with the client
* Identify and address technical debt within owned areas of the codebase
* Communicate with business stakeholders and external data providers to clarify requirements and resolve delivery issues

Mandatory Skills Description:

- At least 3 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 unit testing frameworks (JUnit, Mockito)
- Experience with the Spring Framework (IoC, Dependency Injection)
- Experience developing RESTful services
- SQL knowledge and experience with relational databases (PostgreSQL or Oracle is a plus)
- Hands-on experience with ORM frameworks, preferably Hibernate
- Experience with Git or other distributed version control systems
- Understanding of containerization (Docker); CI/CD experience is a plus

- Confident working with Unix/Linux environments

- 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: B1 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
  It's a business‑critical set of applications and shared libraries responsible for managing financial reference data used by internal development and operations teams.
  The solutions focus on:
  * Retrieving reference data from multiple external providers
  * Processing, validating, and normalizing incoming data
  * Persisting data in relational databases with strong integrity requirements
  * Exposing reliable APIs and reusable libraries for internal systems
  
  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 4 cross‑functional engineers. Each team member contributes to both backend and frontend components.
  
  We collaborate daily with the client's engineers (4-5 people) and follow Agile best practices, and operate as one integrated team.
  
  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 product features end‑to‑end, covering frontend, backend, and data layer
  * Develop reusable, maintainable, and well‑tested code following team standards and best practices
  * Write and maintain unit, integration, and E2E tests to ensure reliability and scalability
  * Participate in code reviews, provide constructive feedback, and improve overall code quality
  * Collaborate with other engineers to clarify requirements and propose technical solutions
  * Take ownership of assigned features from requirements refinement to production deployment
  * Actively participate in Scrum events (planning, refinement, reviews, retrospectives), including direct communication with the client
  * Identify and address technical debt within owned areas of the codebase
  * Communicate with business stakeholders and external data providers to clarify requirements and resolve delivery issues

   

• Mandatory Skills Description:

  - At least 3 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 unit testing frameworks (JUnit, Mockito)
  - Experience with the Spring Framework (IoC, Dependency Injection)
  - Experience developing RESTful services
  - SQL knowledge and experience with relational databases (PostgreSQL or Oracle is a plus)
  - Hands-on experience with ORM frameworks, preferably Hibernate
  - Experience with Git or other distributed version control systems
  - Understanding of containerization (Docker); CI/CD experience is a plus
  
  - Confident working with Unix/Linux environments
  
  - 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
  • Ukrainian: C1 Advanced

A Senior Java Backend Developer is required to work on a large-scale video streaming platform with DRM, OTT services, and distributed architecture.

The role is focused on backend development, system design, and building reliable, high-load services.

What the role involves

Backend services are designed and developed as the core of the platform, handling users, content, security, and communication between multiple systems

The work directly impacts how video content is securely delivered to users across web, mobile, and TV devices.

Main responsibilities

Design and development of backend services using Java (primary language)

Development and support of REST APIs and microservices

Implementation of authentication, authorization, and access control logic

Work with high-load systems and distributed architecture

Design and optimization of database structures and data replication

Integration with DRM systems and content protection services

Implementation of content lifecycle logic (VOD, live streams, catch-up, user rights)

Ensuring scalability, fault tolerance, and performance

Implementation of monitoring, logging, and system health checks

Collaboration with frontend and infrastructure teams

Tech stack (focus)

Java (Spring / Spring Boot preferred)

REST APIs, microservices

SQL / NoSQL databases

Distributed systems and data replication

Linux-based environments

Nice to have (big advantage)

Experience with video streaming platforms (OTT, IPTV)

Knowledge of DRM technologies (Widevine, PlayReady, FairPlay)

Understanding of HLS / MPEG-DASH streaming

Experience with CDN / media delivery systems

Kotlin experience (optional)

What makes the role interesting

Work on a complex, real-world high-load system

Solving scaling and performance challenges

Building systems combining backend, security, and media streaming

Opportunity to contribute to architecture-level decisions

Candidate profile

Strong experience in Java backend development

Good understanding of system design and microservices

Experience with high-load or distributed systems

Ability to work with complex technical domains

Focus on clean, maintainable, and scalable code

Additional requirements:

English proficiency at B1 level or higher (written and spoken)

Candidate must be located outside of Russia, Belarus, Georgia, Turkey

Client from USA

Job Description

We are seeking a Technical Lead to drive the design and development of the new OneAPI backend platform, a scalable API infrastructure running on cloud-native architecture (AWS & GCP). The Technical Lead will guide a small team of engineers, provide hands-on coding expertise, and ensure delivery excellence with a DevOps-first mindset.

• 10+ years of backend engineering experience with strong expertise in Java & Spring Boot.
• Proven experience building platform-level APIs and distributed systems.
• Deep knowledge of cloud platforms (AWS and/or GCP) and cloud-native architectures.
• Strong Kubernetes (K8s) experience for container orchestration.
• DevOps mindset: CI/CD pipelines, monitoring, observability, automation.
• Experience leading small, versatile teams and collaborating across disciplines.
• Experience working in a team responsible for products quality
• Strong problem-solving and communication skills.

Job Responsibilities

• Lead architecture and technical design for the OneAPI backend platform.
• Drive best practices in coding, testing, CI/CD, and DevOps culture.
• Collaborate with stakeholders to define API standards, integration patterns, and platform roadmap.
• Provide technical mentorship and guidance to the engineering team.
• Ensure solutions are secure, scalable, and optimized for performance.
• Ensure quality of develope software
• Participate hands-on in development, especially in critical/complex components.

Department/Project Description

Our client is a global leader in cloud security, enabling organizations to securely transform their networks and applications for a mobile and cloud-first world. Through its Zero Trust Exchange™ platform, it provides fast, secure, and seamless access to applications, regardless of device, location, or network. Trusted by thousands of enterprises, their products help reduce risk, lower IT costs, and deliver a better user experience by replacing traditional on-premises security with a modern cloud-delivered approach.

We are seeking a Senior Software Engineer with strong Java backend development experience, deep database knowledge, and hands-on experience building modern cloud-based applications.
This role is focused on new product development, backend  architecture, database performance, containerized deployments, and reliable cloud-native software engineering. The ideal candidate is a strong individual contributor with excellent analytical skills, practical experience with enterprise-grade backend systems, and the ability to work independently in a fast-moving startup environment. This person should be comfortable designing, building, testing, optimizing, and deploying backend services that are reliable, secure, scalable, and maintainable. A strong ability to use modern AI tools effectively in everyday engineering work is required.
 

Key Responsibilities
- Design, develop, test, and maintain backend software using Java.
- Build reliable and scalable backend services for a database optimization platform.
- Participate in new product development, including architecture, implementation, performance tuning, and deployment.
- Design and implement REST APIs, service-layer components, data access layers, and integration points.
- Work with relational databases, especially PostgreSQL, with a strong focus on performance, query optimization, schema design, indexing, and troubleshooting.
- Analyze execution plans, identify database bottlenecks, and recommend or implement corrective actions.
- Develop containerized applications and deployment-ready services.
- Participate in cloud-native application development and deployment, especially in Azure-based environments.
- Support and improve CI/CD pipelines, automated testing practices, deployment processes, and release reliability.
- Apply secure coding practices and follow cloud security principles.
- Perform root-cause analysis for complex technical problems across application, database, operating system, and cloud layers.

- Write clean, maintainable, well-documented code.
- Participate in code reviews and contribute to engineering standards.
- Mentor less experienced engineers when needed.
- Use AI tools effectively and responsibly for coding, debugging, analysis, documentation, test generation, and technical research.
 

Required Qualifications
- 5+ years of professional Java development experience.
- Strong experience with backend application development.
- Strong understanding of the Java ecosystem, including Spring Framework / Spring Boot, REST API development, JPA / Hibernate, JDBC and database integration, multithreading and concurrency, and Java performance tuning and memory management.
- 3+ years of experience with Azure cloud environments.
- Hands-on experience with both Windows and Linux operating systems.
- Strong PostgreSQL experience, including SQL development, query optimization, schema design, indexing strategies, execution plan analysis, performance troubleshooting, and data migration
concepts.
- Strong experience with modern cloud DevOps practices, including CI/CD, cloud deployment models, release automation, environment configuration, and deployment troubleshooting.
- Strong experience with containers, especially Docker.
- Strong understanding of software architecture and design, including scalable and maintainable system design, distributed systems concepts, service-oriented or microservices architecture,
technical tradeoff analysis, and legacy modernization.
- Strong testing and code quality practices, including unit testing, integration testing, test automation, code reviews, debugging, and root-cause analysis.
- Strong analytical and problem-solving skills.
- Ability to work independently and take ownership of complex technical problems.
- Strong communication skills and ability to clarify requirements, explain tradeoffs, and propose practical solutions.
- Demonstrated ability to use AI tools productively and responsibly in daily engineering work.
 

Highly Desired / Big Plus

- Experience with MS SQL Server.
- Experience with other database platforms.
- Experience with Infrastructure as Code tools such as Terraform, Bicep, ARM templates, Pulumi, or similar.
- Experience with observability tools and practices, including logging, metrics, tracing, monitoring, alerting, and application performance diagnostics.
- Deeper understanding of cloud security operations, including identity and access management, secrets management, role-based access control, secure network configuration, and secure
deployment practices.
- Experience with Kubernetes or other container orchestration platforms.
- Experience with enterprise-grade, data-intensive applications.
- Experience working in startup-style or fast-moving product development environments.

- Good English communication skills.
 

AI Tooling Expectations
The successful candidate should be able to use AI tools as a regular part of their engineering workflow. This includes using AI to:
- Accelerate coding and refactoring.
- Generate and improve unit and integration tests.
- Assist with debugging and root-cause analysis.
- Analyze logs, errors, SQL queries, and execution plans.
- Draft technical documentation.
- Research technical approaches and compare implementation options.
- Improve productivity without compromising code quality, security, or correctness.
The candidate must understand that AI-generated output requires careful review, validation, testing, and security awareness.
 

Ideal Candidate Profile
The ideal candidate is a senior-level backend engineer who combines strong Java development skills with practical cloud, DevOps, database, and performance engineering experience.
This person should be comfortable working across application code, database design, deployment pipelines, containers, and production troubleshooting. They should be analytical, self-directed,
technically mature, and capable of making sound engineering decisions without requiring heavy supervision.
Because we are building a state-of-the-art database optimization platform, the strongest candidates will be those who enjoy technically challenging work, understand performance-oriented
engineering, and are comfortable working in a startup environment where ownership, initiative, and practical problem-solving are highly valued.

• One of the world's largest providers of products and services to the energy industry has a need to develop and support enterprise information system in Oil & Gas domain.
  Product being developed is a cloud solution for interpretation of geological and geophysical data. Project is based on SCRUM methodology.
  Our project is stable, long-term and constantly adopts new technologies such as newest Java and Eclipse RCP versions, cloud and GPU computing, microservices architecture and other innovative frameworks.
  Work supposes close cooperation with Customer team located in Houston and following Agile principles.
  Our team is senior, supportive and friendly.

• Responsibilities:

  • Collaborate closely with geophysicists, data scientists, and software engineers to translate scientific domain requirements into robust on-prem or Cloud software
  solutions.
  • Design, develop, and maintain high-performance applications for geophysical and geological data analysis, interpretation and visualization (e.g., seismic, horizon,
  fault, velocity model, etc.)
  • Present architectural designs and technical proposals to the architecture review board.
  • Ability to break down development tasks and lay out clear implementation roadmaps.
  • Implement and optimize computation algorithms
  • Design and develop both thin and thick client applications that interact with cloud-based microservices.
  • Ensure high code quality through unit testing, code reviews, security hardening and continuous integration with other domain tools
  • Provide technical support and lead user troubleshooting sessions to resolve issues and ensure smooth operation of DSG application.
  • Mentor junior developers and actively contribute to architectural and implementation decisions.
  • Embrace Agile/Scrum methodologies, delivering and demonstrating working solutions at the end of each sprint
  • Stay current with emerging technologies and trends in geophysical computing and software development.

• Mandatory Skills Description:

  6+ years of hands-on Java development experience
  Strong Java Core knowledge
  Experience with desktop development frameworks: Swing, SWT, or Eclipse RCP
  Proven experience designing and building complex systems end-to-end, not just maintaining or extending existing ones
  Practical understanding of multithreaded programming: ability to implement concurrency in code directly, not only through third-party libraries
  Solid knowledge of design patterns and software architecture principles
  Ability to clearly articulate past projects, personal responsibilities, and concrete individual contributions
  Experience working in non-microservices, non-cloud-native development environments (desktop, embedded, or domain-specific platforms)
  Stable career trajectory, no fragmented job history with short tenures

• Nice-to-Have Skills Description:

  C++ development skills
  Practical experience with the Eclipse RCP framework
  OSGi knowledge
  Oil & Gas domain experience

• Languages:
  • English: B2 Upper Intermediate

We are looking for a strong Java Tech / Team Lead who combines hands-on development with technical leadership for a team of 4–5 engineers. This is a true 70% hands-on / 30% leadership role.

The company is building a modern platform that processes real-time market data and helps users make trading decisions based on deep analytics and market insights.

Key Responsibilities:

• Develop backend architecture and APIs
• Work with payments, subscriptions, and external integrations
• Ensure platform stability and continuous improvements
• Participate in system migrations and platform evolution
• Mentor and support a small engineering team
• Collaborate closely with the CTO and Product team

Requirements:

• 8+ years of backend development experience (Java + Spring)
• 2+ years in a Tech Lead / Team Lead role
• Strong experience with PostgreSQL and REST APIs
• Experience with CI/CD and Docker
• Strong understanding of complex distributed systems and integrations
• English level B2+

Nice to have:

• Experience with Stripe / payments / subscription systems
• Knowledge of OAuth2 / Keycloak
• Experience with legacy systems or migration projects
• Interest in fintech or trading domains

What we offer:

• Direct impact on a product used by thousands of traders worldwide
• Small, strong engineering team
• Fully remote work environment
• Modern fintech product with real-time data challenges
• Opportunity to shape both legacy and next-generation architecture

Project description

One of the world's largest providers of products and services to the energy industry has a need to develop and support enterprise information system in Oil & Gas domain.
Product being developed is a cloud solution for interpretation of geological and geophysical data. Project is based on SCRUM methodology.
Our project is stable, long-term and constantly adopts new technologies such as newest Java and Eclipse RCP versions, cloud and GPU computing, microservices architecture and other innovative frameworks.
Work supposes close cooperation with Customer team located in Houston and following Agile principles.
Our team is senior, supportive and friendly.

Responsibilities

Collaborate closely with geophysicists, data scientists, and software engineers to translate scientific domain requirements into robust on-prem or Cloud software

solutions.

Design, develop, and maintain high-performance applications for geophysical and geological data analysis, interpretation and visualization (e.g., seismic, horizon,

fault, velocity model, etc.)

Present architectural designs and technical proposals to the architecture review board.

Ability to break down development tasks and lay out clear implementation roadmaps.

Implement and optimize computation algorithms

Design and develop both thin and thick client applications that interact with cloud-based microservices.

Ensure high code quality through unit testing, code reviews, security hardening and continuous integration with other domain tools

Provide technical support and lead user troubleshooting sessions to resolve issues and ensure smooth operation of DSG application.

Mentor junior developers and actively contribute to architectural and implementation decisions.

Embrace Agile/Scrum methodologies, delivering and demonstrating working solutions at the end of each sprint

Stay current with emerging technologies and trends in geophysical computing and software development.

Skills

Must have

6+ years of hands-on Java development experience

Strong Java Core knowledge

Experience with desktop development frameworks: Swing, SWT, or Eclipse RCP

Proven experience designing and building complex systems end-to-end, not just maintaining or extending existing ones

Practical understanding of multithreaded programming: ability to implement concurrency in code directly, not only through third-party libraries

Solid knowledge of design patterns and software architecture principles

Ability to clearly articulate past projects, personal responsibilities, and concrete individual contributions

Experience working in non-microservices, non-cloud-native development environments (desktop, embedded, or domain-specific platforms)

Stable career trajectory, no fragmented job history with short tenures

Nice to have

C++ development skills

Practical experience with the Eclipse RCP framework

OSGi knowledge

Oil & Gas domain experience

Languages

English: B2 Upper Intermediate

CrunchCode — міжнародна сервісна ІТ-компанія з досвідом близько 7 років у розробці вебсервісів і вебзастосунків. Ми працюємо у форматах staff augmentation (outstaff) та outsourcing і підключаємо спеціалістів до проєктів клієнтів у довгостроковій моделі співпраці.

Ми працюємо переважно з проєктами в доменах логістики (включно з last mile),e-commerce, fintech та банкінгу, а також enterprise-рішеннями.
Для нас важливо, щоб проєкт був “чистим” і зрозумілим з точки зору етики та цінності для користувачів.

Ми принципово не беремо проєкти, пов’язані з:
● gambling / гемблінгом,
● adult-контентом та порнографією,
● шахрайством або будь-якою розробкою, що спрямована на обман чи маніпуляції.

What We Offer:
● Fully remote work
● Long-term, stable project
● High level of autonomy and trust
● Minimal bureaucracy
● Direct impact on business-critical logistics systems
● Long-term engagement, not a short-term contract.

Project Overview

Large-scale video streaming platform with DRM, OTT services, and distributed architecture. Backend development at the core — handling users, content, security, and communication across multiple systems. The work directly impacts how video content is securely delivered across web, mobile, and TV devices.
 

Tech Stack Java · Spring Boot · REST · Microservices · SQL / NoSQL · Distributed Systems · DRM · Linux

Requirements (Must-have):

• Strong hands-on Java backend development experience
• English B1+ (written and spoken)
• Spring / Spring Boot — production level
• REST APIs and microservices design and implementation
• SQL / NoSQL databases — design and optimization
• Distributed systems and data replication
• Linux-based environments
  
  Responsibilities:
• Design and develop backend services using Java as the primary language
• Build and maintain REST APIs and microservices
• Implement authentication, authorization, and access control logic
• Work with high-load distributed architecture and data replication
• Integrate with DRM systems and content protection services (Widevine, PlayReady, FairPlay)
• Implement content lifecycle logic — VOD, live streams, catch-up, user rights
• Ensure scalability, fault tolerance, and performance
• Set up monitoring, logging, and system health checks
• Collaborate with frontend and infrastructure teams
  
  Nice to Have:
• Experience with OTT / IPTV video streaming platforms
• Knowledge of DRM technologies — Widevine, PlayReady, FairPlay
• Understanding of HLS / MPEG-DASH streaming
• Experience with CDN / media delivery systems
• Kotlin (optional)
  
  Hiring Process: Intro call → Technical discussion → Offer

 Who we’re looking for
We’re looking for a Senior Java Backend Developer to design, implement, and integrate highly scalable RESTful APIs and cloud-based distributed systems.
The goal is to ensure maintainable code, robust automated testing, and operational stability within a modern AWS ecosystem.

Ideal candidate:
• 7+ years of proven, practical experience with Spring Boot
• Strong proficiency in Java 17+/21, including modern language features
• Expertise in RESTful API design, implementation, and integration
• Strict adherence to clean code principles, automated testing, and SOLID, KISS, YAGNI
• Hands-on experience with cloud-based/distributed systems, specifically AWS (Lambda with Java runtime, API Gateway, CloudWatch)
• Strong CI/CD practices with a focus on monitoring and operational stability
• Very mature and fluent English for Pan-Baltic level communication
• Nice to have: Previous experience in banking, finance, or regulated environments; Quarkus experience

 Cooperation details (white-label)
• Start: ASAP, Full-time
• Format: Hybrid/Remote with occasional not being afraid office visits, paid business trip if to another country. Once per month on average.
• Budget: Open for your rates (in EUR)

 Senior Data Engineer

 Client - Enterprise Banking Client in the Baltics