Jobs Java

Please note that this vacancy is for developers living in Kyiv.

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: 

proteanTecs is a game-changing startup redefining the way advanced electronics monitor their own health. In a world driven by AI, cloud computing, and autonomous systems, reliability isn’t optional - it’s essential. But how do you ensure peak performance and prevent failures before they happen?

That’s where proteanTecs comes in. The product provides real-time visibility into next-gen chips while they operate, using cutting-edge on-chip monitoring, machine learning, and predictive analytics. The technology helps companies build smarter, more resilient, and more efficient computing systems - eliminating blind spots and unlocking deep insights like never before.

The solution is already trusted by industry leaders in data centers, automotive, communications, and consumer devices. 

About the Role: 
 

proteanTecs is looking for a talented Senior Java Engineer to join the ride as we spearhead the next revolution in electronics. Your work will directly contribute to making electronics smarter, safer, and more reliable - powering everything from data centers to autonomous vehicles. As part of a fast-paced startup, you’ll take on diverse challenges, adapt quickly, and see your solutions shape the future of technology. You will be involved in end-to-end feature delivery alongside a team of 200+ industry-leading professionals who are passionate about innovation and knowledge-sharing. You’ll be working with cutting-edge tools, machine learning models, and advanced platforms to push the boundaries of what’s possible.

Key Responsibilities: 
 

• Develop and maintain robust, scalable, and secure Java-based software solutions
• Collaborate with product managers, architects, and other engineers to design and implement new features
• Build and optimize data processing pipelines for high-volume analytics applications
• Ensure software quality through code reviews, unit testing, and integration testing
• Participate in architectural decisions, contributing to the design of cloud-based systems
• Monitor and optimize system performance to meet scalability and reliability goals
• Troubleshoot, debug, and resolve issues in development, staging, and production environments.

Required Competence and Skills:
 

• BA or B.Sc in Computer Science or an equivalent field
• 5+ years of hands-on experience in Java development
• Strong understanding of object-oriented programming, design patterns, and clean code principles
• Familiarity with database systems (SQL/NoSQL) and query optimization techniques
• Knowledge of cloud platforms (AWS, Azure, GCP) and microservices architecture
• Experience with Spring Boot and the Spring Framework ecosystem
• Experienced with JPA (Hibernate – advantage)
• Strong understanding of REST API
• Experience in performance optimization and distributed systems.
• Excellent problem-solving skills and a proactive attitude
• Strong communication skills and the ability to collaborate in a team environment

Nice to have:
 

• Experience with Python is a strong advantage
• Experience with streaming or messaging services (Kafka, RabbitMQ)
• Knowledge of monitoring tools such as Grafana, Prometheus, or ELK Stack

• Hands-on experience with containerization and orchestration (Docker, Kubernetes)
   
  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.

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

5+ years in Java Development

Strong Java Core knowledge

Nice to have

Experience with desktop development (Swing, SWT or Eclipse RCP)

C++ development

Practical experience with Eclipse RCP framework

OSGI knowledge is a plus

Oil&Gas domain experience is a plus

We are seeking an experienced Senior Cloud Infrastructure Developer to design and implement robust solutions for multi-cloud and hybrid environments, focusing on AWS-Azure integration, secure cross-CSP data transfers, and on-premises connectivity.
This role combines advanced cloud architecture expertise with strong Java development skills to deliver scalable, secure, and high-performance solutions.

Responsibilities

Architect and implement hybrid cloud solutions enabling seamless integration between AWS, Azure, and on-premises environments.

Design and develop Java-based services for infrastructure automation and data transfer workflows.

Build and optimize secure cross-cloud and hybrid data pipelines, ensuring compliance with performance and security standards.

Configure and manage network connectivity across CSPs and on-prem systems, including VPCs, private links, and ExpressRoute/Direct Connect.

Collaborate with security teams to enforce identity, access, and encryption best practices across all platforms.

Stay current with emerging multi-cloud and hybrid technologies and recommend improvements for scalability and reliability.

Provide technical leadership and mentorship to team members.

Skills

Must have

8+ years of experience in cloud infrastructure and software development.

Bachelor's degree in Computer Science, Engineering, or related technical field.

Strong proficiency in Java for backend and infrastructure-related services.

Hands-on experience with AWS and Azure services, including networking, storage, and identity management.

Expertise in multi-cloud architecture, hybrid connectivity, and cross-CSP data transfer strategies.

Familiarity with on-prem integration and hybrid networking solutions.

Experience with containerization (Docker) and orchestration (Kubernetes).

Proficiency in CI/CD pipelines and Infrastructure as Code (i.e. Terraform).

Solid understanding of security best practices for cloud and hybrid environments.

Nice to have

Knowledge of data encryption, compliance frameworks, and secure transfer protocols.

Familiarity with monitoring and observability tools (Prometheus, Grafana, CloudWatch,

Azure Monitor).

Prior experience in multi-cloud migration and hybrid integration projects.

We're building a modern SaaS application and seeking a Middle Java Backend Engineer to join our growing team. You'll play a key role in architecting and developing our API infrastructure while contributing to AWS-based deployment strategies.

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)
• Hands-on experience with MongoDB and NoSQL database design
• Solid SQL knowledge and relational database experience
• 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.

Our Mission and Vision

At Solidgate, our mission is clear: to empower outstanding entrepreneurs to build exceptional internet companies. We exist to fuel the builders — the ones shaping the digital economy — with the financial infrastructure they deserve. To achieve that, we’re on a bold path: to become the #1 payments orchestration platform in the world.

About the Team and Role

We’re looking for a Kotlin Engineer to join our Finance Engineering team, which builds the finance system. It's essentially a highly powerful calculator that helps businesses run smoothly. The goal is simple: ensure that every dollar merchants and Solidgate earn ends up in their accounts correctly and on time.

We process over 18 million payments every month, generating fees based on each individual's specific settings. This affects automated payouts and financial reports.

Why it may be your next big move

Impactful work. Build a mission-critical platform that directly affects the products you use every day. We’re defining what future Solidgate financial contracts will look like.

Collaboration with experts. Work alongside engineers who built systems at Amazon, Revolut, Wix, and other world-class products.

Solve complex challenges. Design solutions for sophisticated financial logic while optimizing for reliability, observability, throughput, and scalability.

Autonomy & ownership. Own your work end-to-end — from design to deployment — and see the direct business impact of your decisions.

AI-assisted engineering: We invest in developer productivity by fully covering tools like GitHub Copilot, Windsurf/Cursor, and Coderabbit. You’ll write less boilerplate, ship faster, and focus on solving real problems — not fighting with repetitive code.

Why is it the perfect time to join?

We’re building a next-generation financial system from scratch — not refactoring legacy code.

We’re standardizing fee calculation logic, making configuration transparent and modular, and laying the groundwork for new financial modules such as pricing, billing, ledger, and more.

Explore our technology stack ➡️ here (https://solidgate-tech.github.io/)

What You’ll Drive

• Architecture & Implementation. Design and implement end-to-end solutions for commissions, agreements, financial reporting, and other features for merchants and internal users.
• Extreme Ownership. Take responsibility for outcomes — not just tasks — ensuring quality, clarity, and effectiveness across the project lifecycle.
• Competence Growth & Contribution. Actively share knowledge, initiate improvements, and drive both product and process enhancements to completion.
• Partnership with Product & Stakeholders. Participate in planning, clarify requirements, explore trade-offs, and help shape solutions in a transparent, constructive way.
• High Standards & Engineering Discipline. Write clean, simple code. Maintain clear service contracts. Ensure backward compatibility. Manage safe, reliable migrations.

• Speed + Quality. Move fast without breaking things — balancing delivery velocity with robust engineering practices.

   

What We Pay Attention To:
Technical Mastery

You know your way under the hood:

• JVM Stack — 5+ years of professional experience with JVM technologies, including Kotlin, Spring Boot, and Hibernate.
• Large Databases — Experience working with relational databases exceeding 1TB, optimizing queries for performance.

• Kafka — hands-on work with Kafka and a solid understanding of key consumer metrics and operational considerations.

   

Mindset & Impact

You don’t just ship code — you own outcomes:

• Product mindset — You think end-to-end and build solutions that solve real user problems.
• Ownership & independence — You drive projects forward and take responsibility for decisions.
• Ability to learn quickly — You pick up new technologies and patterns without waiting for instructions.
• High standards & accountability — You deliver reliable systems and hold yourself to exceptional quality.
  
   

The Points That Make You Stand Out

• Experience with Kafka Streams, SQS, S3, Redshift

• Background in Fintech, especially in payments, billing, or financial processing

   

Why Solidgate?

High-impact role. You’re not inheriting a perfect system — you’re building one.

Massive growth opportunity. Solidgate is scaling rapidly — this role will be a career-defining move.

Modern engineering culture. TBDs, code reviews, solid testing practices, metrics, alerts, and fully automated CI/CD.

Top-tier tech team. Work alongside our driving force — a proven, results-driven engineering team that delivers. We’re also early adopters of cutting-edge fraud and chargeback prevention technologies from the Schemes.

Great product. We’ve built a fintech powerhouse that scales fast. Solidgate isn’t just an orchestration player — it’s the financial infrastructure for modern Internet businesses. From subscriptions to chargeback management, fraud prevention, and indirect tax — we’ve got it covered. We hold financial licenses in key regions and are a direct Visa & Mastercard partner and sub-reseller (top 5 globally).

💌 The Extras: 30+ days off, unlimited sick leave, free office meals, health coverage, and Apple gear to keep you productive. Courses, conferences, sports and wellness benefits — all designed for ideas, focus, and fun.

Tomorrow’s fintech needs your mindset. Come build it with us.

🫂 Know top talent? We’re always on the lookout. Recommend someone for our role, and if they get hired, there’s a bonus waiting for you — simple as that.

• Project Description:

  We are building the platform, which supports various information gathering and processing across the bank and providing access to this data through both private and public cloud approach. The solution will be built from the scratch using the latest technologies.

• Responsibilities:

  - Write good and well-tested code using Java
  - Write Test Cases and User/Supporter Documentation of your code
  - Development environment support (mostly automation using Jenkins CI, Bash)
  - Evaluate and adopt new development tools, libraries and approaches to improve quality
  - Perform peer code review of project codebase changes

• Mandatory Skills Description:

  - At least 6 years of experience in the industry of software development
  - At least 5+ years of experience in Java
  - Deep knowledge and usage of SQL (Oracle or PostgreSQL dialects is preferable)

• Nice-to-Have Skills Description:

  - Experience with Messaging Systems: RabbitMQ, Kafka, etc.
  - Experience with Kubernetes and Docker
  - Linux user

• Languages:
  • English: B2 Upper Intermediate

• We are building the platform, which supports various information gathering and processing across the bank and providing access to this data through both private and public cloud approach. The solution will be built from the scratch using the latest technologies.
•  

• Responsibilities:

  - Write good and well-tested code using Java
  - Write Test Cases and User/Supporter Documentation of your code
  - Development environment support (mostly automation using Jenkins CI, Bash)
  - Evaluate and adopt new development tools, libraries and approaches to improve quality
  - Perform peer code review of project codebase changes

   

• Mandatory Skills Description:

  - At least 6 years of experience in the industry of software development
  - At least 5+ years of experience in Java
  - Deep knowledge and usage of SQL (Oracle or PostgreSQL dialects is preferable)

   

• Nice-to-Have Skills Description:

  - Experience with Messaging Systems: RabbitMQ, Kafka, etc.
  - Experience with Kubernetes and Docker
  - Linux user

   

• Languages:
  • English: B2 Upper Intermediate

Project Description:

We are building the platform, which supports various information gathering and processing across the bank and providing access to this data through both private and public cloud approach. The solution will be built from the scratch using the latest technologies.

Responsibilities:

- Write good and well-tested code using Java
- Write Test Cases and User/Supporter Documentation of your code
- Development environment support (mostly automation using Jenkins CI, Bash)
- Evaluate and adopt new development tools, libraries and approaches to improve quality
- Perform peer code review of project codebase changes

Mandatory Skills Description:

- At least 6 years of experience in the industry of software development
- At least 5+ years of experience in Java
- Deep knowledge and usage of SQL (Oracle or PostgreSQL dialects is preferable)

Nice-to-Have Skills Description:

- Experience with Messaging Systems: RabbitMQ, Kafka, etc.
- Experience with Kubernetes and Docker
- Linux user

Languages:

English: B2 Upper Intermediate

Eternity Law International is supporting an international iGaming company in hiring a Backend Developer (Java or Go) to develop and maintain our RGS (Remote Game Server), wallet integrations, and game logic services.

Responsibilities

• Develop and maintain backend services for slot games (RGS)
• Implement and support game logic (spins, payouts, bonus mechanics, free spins)
• Work with RNG, game math, and deterministic game flows
• Integrate with wallets, operators, and aggregators
• Ensure idempotency, consistency, and transactional integrity
• Design and maintain REST APIs for game clients
• Work with databases (PostgreSQL, Redis)
• Handle high-load and low-latency scenarios
• Implement logging, monitoring, and error handling
• Participate in code reviews and architecture decisions

• Collaborate with product managers, game designers, and frontend teams

   

Requirements

• Proven experience in backend development for iGaming game products (slot games/casino games)
• Strong backend development experience in Java or Go
• Experience building high-load, production-grade backend systems
• Solid understanding of REST APIs and microservices
• Experience with relational databases (PostgreSQL, MySQL)
• Understanding of concurrency, transactions, and data consistency
• Experience with Docker and CI/CD pipelines
• Ability to write clean, maintainable, and testable code

• English - upper-intermediate or higher

   

iGaming / Slot-Specific Knowledge (Required or Strong Plus)

• Understanding of slot mechanics: RTP, volatility, max win, paylines
• Experience with RGS architecture
• Knowledge of RNG principles and deterministic spin generation
• Experience with wallet integrations (debit/credit, idempotency)
• Understanding of certification requirements (GLI, BMM, iTech Labs)

Nice to Have

• Experience in iGaming or casino game development
• Experience with event-driven architectures
• Knowledge of Redis / Kafka / RabbitMQ
• Experience working with aggregators and operators
• Familiarity with security best practices (hashing, signatures, request validation)

What We Offer

• Work on real-money slot games and core gaming infrastructure
• Influence architecture and core backend decisions
• Collaboration with a strong game math, product, and frontend team
• Competitive compensation
• Flexible work format (remote / hybrid)
• Long-term growth in a scaling iGaming studio

Delasport is an iGaming Software company providing Sports Betting & Online Casino software, and turnkey B2B solutions. Established in 2010, Delasport delivers a one-stop-shop solution of Sports Betting and Online Casino from a White-Label, with a full range of management services to a Plug&Play iFrame and a complete Turnkey. We are establishing an R&D centre in Kyiv, and are looking for top talents to join our team.

TECHNOLOGY STACK

Microservice architecture, Java 21, Spring Boot 3.4+, PostgreSQL, MongoDB, Kafka, Google Cloud Platform, Kubernetes

RESPONSIBILITIES

• Development of new business initiatives, an extension of existing ones
• Taking an active part in improvements and optimizations to the systems
• Resolve technical problems, critical thinking on the development approach
• Be part of a cross-functional team with end-to-end responsibility for the result

REQUIREMENTS

• 3+ years of commercial development experience using Java-related technologies
• 1+ years of working experience with API development
• Hands-on experience with microservice architecture
• Ambition to write high-quality code covered with unit tests
• Solid debugging and troubleshooting skills
• Proactive and result-oriented mindset
• Strong problem-solving skills
• At least Upper-Intermediate English level

WHAT WE CAN OFFER YOU

• Modern office in Podil with an uninterruptible power supply and the Internet
• Personal time off (21 business days of paid vacation, paid days on special occasions, sick leaves, emergency days off)
• Public holidays
• Health and life insurance with our broker, available starting from the month following the employee’s start date with the company
• Modern technical equipment
• English courses with native speakers
• Ukraine-based educational programs
• Sports activities reimbursement
• Corporate entertainments
• Happy hours on Fridays
• Gig contract support

Requirements:

- 5+ years of experience in Java development
- Strong knowledge of Spring Boot, Spring Security, Spring Data
- Solid understanding of REST APIs, Microservices architecture, and Cloud deployments
- Proficiency in SQL and NoSQL databases (PostgreSQL, MongoDB, etc.)
- Experience with Docker, Kubernetes, or OpenShift
- Familiarity with CI/CD pipelines (Jenkins, GitLab CI, Azure DevOps, etc.)
- Knowledge of unit and integration testing (JUnit, Mockito)
- German language level: B2 or higher
 

Nice to have:

- Experience in Azure or AWS cloud environments
- Knowledge of Angular or React frontend frameworks

Client's location - Germany, format - remote

Delasport — Implementing Technological Solutions Here and Now.

Delasport is an iGaming Software company providing Sports Betting & Online Casino software, and turnkey B2B solutions. Established in 2010, Delasport delivers a one-stop-shop solution of Sports Betting and Online Casino from a White-Label, with a full range of management services to a Plug&Play iFrame and a complete Turnkey. We are looking for the top talents to join our team in R&D centre in Kyiv.

TECHNOLOGY STACK

Microservice architecture, Java 21, Spring Boot 3.5, Kafka, Google Cloud, Kubernetes

RESPONSIBILITIES

• Taking an active part in product development from scratch (hands-on functionality development ~50% of the time) and developing functional documentation
• Leading a development team
• Ensuring the highest standards of the team’s performance are reachable
• Planning, prioritizing, estimating, and executing tasks
• Collaborating with business leads across the company to define milestones and deliveries for new functionality to be added to the product
• Taking part in team extension (interviewing, providing feedback, participating in interview post-briefs)

REQUIREMENTS

• 7+ years of commercial development experience using Java-related technologies
• 5+ years of working experience with API development
• Experience in managing development teams
• Ability to work independently with defined problems on a middle-senior level in certain areas of technical or business expertise
• Proactive and result-oriented mindset
• Strong problem-solving skills
• At least Upper-Intermediate English level

NICE TO HAVE

• Knowledge of JavaScript/React

WHAT WE CAN OFFER YOU

• Modern office in Podil with an uninterruptible power supply and the Internet
• Personal time off (21 business days of paid vacation, paid days on special occasions, sick leaves, emergency days off)
• Public holidays
• Health and life insurance with our broker, available starting from the month following the employee’s start date with the company
• Modern technical equipment
• English courses with native speakers
• Ukraine-based educational programs
• Sports activities reimbursement
• Corporate entertainments
• Happy hours on Fridays
• Gig contract support

Duda is a leading SaaS B2B web design platform that powers over one million websites for more than 22,000 agencies and businesses worldwide. It combines a drag-and-drop website builder with integrated AI tools that generate content, optimize SEO, translate text, and automate image descriptions. 
The platform operates at high scale and handles complex data workflows, including multi-currency pricing, A/B testing, and dynamic page rendering. Agencies rely on Duda to launch customizable, high-performance sites rapidly, making robust backend engineering essential to maintain reliability, performance, and seamless client workflows.

About the Role:

As a Senior Backend Engineer, you will join one of Duda’s cross-functional R&D squads, owning critical components of the core platform. You will lead the design and implementation of backend services, developing new features while collaborating closely with product managers, QA engineers, frontend developers, and designers to ship end-to-end solutions. 
This role offers deep technical challenges in distributed systems, multithreading, and database optimization, with the autonomy to drive architectural decisions and make a tangible impact on product performance and scalability.

Key Responsibilities:

• Design, build, and maintain scalable backend services using Java and Spring-based technologies for Duda’s core platform used by thousands of customers.
• Contribute to all phases of the development lifecycle, from understanding complex business requirements to design, implementation, testing, and production rollout.
• Collaborate in Agile squads to gather requirements, review designs, and plan sprint deliverables.
• Conduct code reviews and drive technical excellence across the backend team.
• Identify and resolve performance bottlenecks, concurrency issues, and production incidents.

Required Competence and Skills:

• 7+ years of professional experience in backend software development
• Expert proficiency in Java and its ecosystem
• Hands-on experience with the Spring Framework
• Strong understanding of multithreading, concurrency, and performance optimization in Java
• Practical experience with relational databases such as Oracle and MySQL
• Solid test-driven development skills, including unit and integration testing
• BSc in Computer Science or an equivalent technical degree
• Fluent English, both written and spoken

Nice to Have:

• Experience with Spring Boot or similar backend frameworks
• Hands-on experience with NoSQL databases (e.g., DynamoDB, MongoDB)
• Experience designing and building distributed microservices
• Familiarity with REST APIs, event-driven architectures, and asynchronous processing
• Experience with frontend technologies (TypeScript, JavaScript, React, HTML, CSS)
• Exposure to generative AI tools in development workflows (e.g., AI-assisted coding)
• Previous experience in a startup or fast-paced, high-growth environment
• Familiarity with AWS infrastructure, serverless components, or containerized environments

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:

proteanTecs provides real-time visibility into next-generation semiconductor devices while they operate, combining on-chip monitoring, machine learning, and predictive analytics. The platform processes high-volume streaming data from chips in data centers, automotive systems, communications networks, and consumer electronics, identifying anomalies and predicting failures before they occur. By eliminating blind spots in chip performance and reliability, the solution supports critical applications that demand continuous uptime and deep diagnostic insights. Strong engineers are key to advancing the scalable, data-intensive infrastructure that powers these insights and safeguards mission-critical systems.

About the Role:

As a Senior Java Engineer at proteanTecs, you will own end-to-end delivery of backend features that enable real-time analytics and predictive monitoring for advanced electronics. You will collaborate with product managers, architects, and peers across a 200+ person organization to design and implement scalable microservices, data pipelines, and cloud infrastructure. This role offers autonomy and significant influence on system architecture, performance, and reliability at scale. You will tackle complex technical challenges, from optimizing distributed systems to integrating AI-driven analysis agents, ensuring that each release meets stringent quality and operational standards.

Key Responsibilities:

• Develop and maintain robust, scalable, and secure Java-based backend services

• Design and implement microservices using Spring Boot and the Spring Framework ecosystem

• Build and optimize data processing pipelines for high-volume analytics workloads

• Contribute to architectural decisions for cloud-based deployments (AWS, Azure, GCP)

• Ensure software quality through rigorous code reviews, unit testing, and integration testing

• Monitor, profile, and optimize system performance to meet scalability and reliability targets

• Troubleshoot and resolve issues in development, staging, and production environments

• Integrate and support AI-driven components that automate on-chip data analysis and platform interactions

Required Competence and Skills:

• Bachelor’s degree in Computer Science or a related field

• 5+ years of professional Java development experience

• Deep understanding of object-oriented design, design patterns, and clean code principles

• Proficiency with Spring Boot, Spring Framework, and JPA/Hibernate

• Experience designing and consuming RESTful APIs

• Expertise in microservices architecture and cloud platforms (AWS, Azure, or GCP)

• Solid background in with database systems (SQL/NoSQL) and query optimization techniques 

• Proven skills in performance optimization and distributed systems design

• Familiarity with test-driven development, unit testing frameworks, and integration testing

• Excellent English, strong communication skills and the ability to collaborate in a team environment

Nice to Have:

• Experience with Python scripting

• Familiarity with streaming or messaging systems such as Kafka or RabbitMQ

• Knowledge of monitoring and observability tools (Grafana, Prometheus, ELK Stack)

• Hands-on experience with containerization and orchestration technologies (Docker, Kubernetes)

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.

The engineering team seeks individuals passionate and disciplined about writing great software, and working together to tackle the challenges of the programmatic ad tech space in high-load and high-performance environment. The team values developers that embody a sense of ownership, are enthusiastic about learning and sharing knowledge, take responsibility for their work.

Founded in 2007, the company pioneering technology created a new model for the advertising industry. Today, our automated advertising platform is used by the world’s leading publishers and applications to transact with top brands around the globe enabling them to reach more than 1 billion consumers. The client operates the largest independent Display Advertising Exchange and Supply Side Platform, automating the buying and selling of Display Advertising across all formats (banner, video) on all devices (desktop browsers, mobile devices, billboards). Company auctions over 20 Billion Ads on a daily basis in real time in less than 1/2 of a second each. Client is a publicly traded company (NYSE: RUBI) headquartered in Los Angeles, California, USA.

Requirements:

• 3+ years coding experience in server-side Java
• Java Core knowledge (Java 8 or higher, Collections, Exceptions, Concurrency)
• Commercial experience with Spring Framework (Boot, Core, MVC, Data)
• Experience with RDBMS (MySQL, PostgreSQL), native SQL, ORMs (Hibernate)
• Handy use of cloud services (AWS)
• Understanding of VCS (Git)
• English verbal and written communication skills
• Shifted working hours 12pm till 8pm EEST timezone

Nice to have experience with:

• Practice with reactive paradigm (Project Reactor, Spring Webflux, Vert.x)
• Experience with Redis, Aerospike, RabbitMQ, Kafka, Camel

Job responsibilities:

• Be a creative problem-solver who can draw on an array of expertise and technology to design and implement reliable, scalable and maintainable solutions to challenging problems
• Translate business requirements into technical designs and project plans
• Write production-ready code and unit tests that meet both system and business requirements (Java)
• Respond to feature requests, bug reports, performance issues and ad-hoc questions
• Work collaboratively with multiple teams to deliver quality software
• Support operation of services in production
• Perform code reviews and design reviews