Jobs Java

We are looking for a Senior or Lead Software Development Engineer to join a cloud data platform initiative focused on managed Kafka connectors. The role centers on accelerating onboarding of first-party connectors, improving reliability and launch readiness, and helping expand a managed connector ecosystem used in data-intensive cloud services.

Tasks

• Accelerate onboarding of new first-party managed Kafka connectors;
• Improve connector quality, reliability, and operational readiness;
• Integrate authentication and platform-specific cloud requirements;
• Translate connector behavior into implementation details, UI specs, and documentation inputs;
• Support launch gates such as probers, load testing, playbooks, and launch reviews.

Responsibilities

• Strong Java experience, as the core workers and connectors are implemented in Java;
• Practical Go experience for API-facing changes and service integration work;
• Practical experience with GCP cloud;
• Experience integrating, debugging, and improving connector-based or data integration systems;
• Ability to work across performance, stability, authentication, and network-compatibility concerns;

• Strong engineering ownership across delivery, launch readiness, and operational quality.

   

Nice to Have:

• Experience with Kafka Connect ecosystems;
• Experience with CDC-oriented connectors or sink/source integrations;

• Exposure to cloud data systems such as BigQuery, Spanner, Bigtable, Iceberg, or Debezium-based workflows.

   

Engagement Type

• B2B contract.

   

Location / Timezone

• Priority location is Krakow, Poland;
• On-site presence at the Akvelon office

We are looking for a Senior or Lead Software Development Engineer to join a cloud data platform initiative focused on managed Kafka connectors. The role centers on accelerating onboarding of first-party connectors, improving reliability and launch readiness, and helping expand a managed connector ecosystem used in data-intensive cloud services.

Tasks

• Accelerate onboarding of new first-party managed Kafka connectors;
• Improve connector quality, reliability, and operational readiness;
• Integrate authentication and platform-specific cloud requirements;
• Translate connector behavior into implementation details, UI specs, and documentation inputs;
• Support launch gates such as probers, load testing, playbooks, and launch reviews.

Responsibilities

• Strong Java experience, as the core workers and connectors are implemented in Java;
• Practical Go experience for API-facing changes and service integration work;
• Practical experience with GCP cloud;
• Experience integrating, debugging, and improving connector-based or data integration systems;
• Ability to work across performance, stability, authentication, and network-compatibility concerns;

• Strong engineering ownership across delivery, launch readiness, and operational quality.

   

Nice to Have:

• Experience with Kafka Connect ecosystems;
• Experience with CDC-oriented connectors or sink/source integrations;

• Exposure to cloud data systems such as BigQuery, Spanner, Bigtable, Iceberg, or Debezium-based workflows.

   

Engagement Type

• B2B contract or Business Incubator 

   

Location / Timezone

• Priority location is Krakow, Poland;
• On-site presence at the Akvelon office

Our Customer:

A product-focused organization developing innovative enterprise-grade solutions, with a strong emphasis on modern engineering practices, AI-driven development, and high-performance distributed systems.

Your tasks:

• Design, develop, and maintain full-stack applications using Java, Spring, Python, and React.
• Own the entire development lifecycle — from architecture and design to implementation, testing, and deployment.
• Work in an Extreme Programming (XP) environment with remote pair programming.
• Build scalable microservices-based systems using Spring Boot and related technologies.
• Develop responsive and reactive user interfaces using modern JavaScript frameworks.
• Apply TDD/BDD practices to ensure high-quality, maintainable code.
• Contribute to DevOps processes, including CI/CD pipelines and automation using Jenkins.
• Design and deploy cloud and hybrid solutions in containerized environments (Kubernetes, Cloud Foundry).
• Collaborate closely with cross-functional teams in a fast-paced, dynamic environment.
• Participate in building AI-driven features, including working with LLMs and prompt engineering.

Required experience and skills:

• 8+ years of experience in software development with strong expertise in Java and Spring.
• 2+ years of hands-on experience with Python.
• Experience working in microservices architecture (Spring Boot / Spring Cloud).
• Strong understanding of modern software design patterns (microservices, service discovery, circuit breaker).
• Hands-on experience with TDD/BDD frameworks (Junit, Jasmin, Mockito, Protractor/Selenium).
• Experience with DevOps practices and tools, including Jenkins.
• Experience with containerization and orchestration (Kubernetes, Cloud Foundry).
• Experience building and deploying cloud or hybrid solutions.
• Experience with functional programming and Java Streams.
• Experience with reactive UI development.
• Hands-on experience with Claude.code.
• Upper-Intermediate or higher level of English.

Would be a plus:

• Frontend development experience, primarily with React.
• Experience with data analytics or data-driven systems.
• Knowledge of Kotlin.

We are looking for an Advanced Software Engineer Java who is passionate about technology, development and deployment of a SaaS product.

Innovecs is a global digital transformation tech company with a presence in the US, the UK, the EU, Israel, Australia, and Ukraine. Specializing in software solutions, the Innovecs team has experience in Supply Chain, Healthtech, Software & Hightech, and Gaming.
For the fifth year in a row, Innovecs is included in the Inc. 5000 and recognized in IAOP’s ranking of the best global outsourcing service providers. Innovecs is featured in the Global Top 100 Inspiring Workplaces Ranking and won gold at the Employer Brand Management Awards.

Our value to you: 

• Flexible hours and remote-first mode
• Competitive compensation
• Complete Hardware/Software setup – anything you need for work
• Open-door culture, transparent communication, and top management at a handshake distance
• Health insurance, vacation, sick leaves, holidays, paid maternity/paternity leave
• Access to our learning & development center: workshops, webinars, training platform, and edutainment events
• Virtual team buildings and social activities 

If you feel like you’re the perfect match for this role, drop us your CV! 

There are no limitations, no barriers when the right people are on your way — apply for the vacancy and succeed with us

Innovecs is an equal opportunity employer. All hiring decisions are based on professional qualifications, skills, and experience. We are committed to a transparent, merit-based recruitment process that prevents discrimination and ensures equal opportunities for all candidates. Reasonable accommodations are available upon request throughout the recruitment process to support accessibility and inclusion.

Requirements

• At least 7+ years of experience in java server-side, and must have deep understanding of reactive systems experience in areas: java concurrent programming, java security, reactive programming, network programming and mechanical sympathy understanding,
• Knowledge of programming patterns and design principles which and solving complex problems using algorithms,
• Experience in low latency / high-throughput algorithms,
• Experience in building large-scale, multi-tenant mission-critical systems,
• Understanding of transport protocols and formats: WebSocket, Google Protocol Buffers, Json, SBE,
• Background with the Fin-Tech industry - big advantage,
• Experience with ultra-low-latency systems - big advantage,
• Experience with Aeron technology - MUST,
• Learn and Contribute to open source projects - big advantage,
• Familiarity with microservices architecture - advantage,
• Experience with cloud and bare-metal environments - advantage,
• Experience with Kubernetes - advantage,
• Experience at working with distributed remote teams,
• Passion Curiosity to constantly learn and improve,
• Passion to help the team members to learn,
• Fluent Verbal and Written English Skills required,
• Self-learning enthusiasm,
• Taking ownership and responsibility,
• Communicative and transparent,

• Team Player.

   

Responsibilities

• Be part of an agile team, the core technological team to build and advance a low latency / high-throughput trading platform,
• Participate in all aspects of the development and influence foundation for a system affecting a huge market,
• Lead features from design to production,
• Take active part of Teamwork and team spirit, share and learn from each other,
• Take part in a deep tech product development,
• Take part in influencing the evolution of exberry architecture,
• Take part in influencing product development and growth,
• Take part in ever improving the product delivery life-cycle,
• Help the agile team meet its goals.

We are looking for an experienced Senior Java Full Stack Engineer to join our development team.
 

Our customer – integrated Shipping Services has set itself apart as an independent carrier with a fresh, unique approach. His strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services, and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.
 

Responsibilities:

• Hands-on full-stack development of innovative applications
• Owning the entire development cycle, including design, architecture, development, and DevOps
• Working in XP with Remote pairing
   

Requirements:

• BS degree in Computer Science or equivalent combination of education and experience
• 5-6+ years of full-stack development
• 5-6+ years of experience in the following technologies: Java, Spring
• Experience with Functional Programming and Java Streams
• 2+ years of experience in front-end development with React
• Experience with developing a reactive UI (Reactive JS)
• 2+ years of experience in TDD/BDD development in the following frameworks: Junit, Jasmin, Mockito, Protractor/Selenium
• 2+ years of experience in micro-services-based architecture and tools (Spring Boot/Cloud)
• Experience in DevOps development and Jenkins
• Experience in development in Kotlin – an advantage
• Experience in designing, developing, and deploying cloud/hybrid-based solutions
• Experience in developing and deploying in container-based environments (Kubernetes, Cloud Foundry)
• Familiarity with the following design concepts: micro-services, service discovery, circuit breaker
• Self-starter with the ability to appropriately prioritize and plan complex work in a rapidly changing environment
• Versatility and the capability to switch easily between different tasks and technologies
• Experience in assessing a broad range of information solutions and products
• Strong critical thinker with problem-solving aptitude
• Good English - verbal and written

About The Project
We are building a large-scale automated advertising platform that powers the buying and selling of digital ads globally. The solution is used by leading publishers and applications to connect with brands and deliver ads to a massive audience worldwide.

The platform operates as a high-load, distributed system that supports multiple ad formats (including display, video, and digital out-of-home) across various devices. It focuses on real-time transactions, scalability, and efficient data processing to ensure seamless ad delivery and optimization.

Job Description

- Experience building and operating large-scale, high-throughput, enterprise apps
- 5+ years coding experience in server-side Java
- Excellent Java Core knowledge (Java 8 or higher, Collections, Exceptions, Concurrency)
- Experience with RDBMS (MySQL, PostgreSQL), native SQL, ORMs (Hibernate)
- Experience with automated testing frameworks (TDD, Mocking, Unit/Functional/Integration)
- Handy use of cloud services (AWS)
- Understanding of VCS (Git)
- Experience working in a Linux environment.
- Fluent English verbal and written communication skills
- Shifted working hours 1pm till 9pm EEST time zone

Nice to have experience with:
- Familiar with Scala, Spark
- Commercial experience with Spring Framework (Boot, Core, MVC, Data)
- Experience with Redis, Aerospike, RabbitMQ, Kafka, Camel
 

Job Responsibilities

- Write production-ready code and unit tests that meet both system and business requirements.
- Respond to feature requests, bug reports, performance issues, and ad-hoc questions.
- Work collaboratively with multiple teams to deliver quality software.
- Comfortable in multi-tasking and fast-pacing dev process.
- Support operation of services in production.

About the Role

We're looking for a Senior Java Engineer to lead the integration and enhancement of a recently acquired Payment Hub into our existing payments platform — ~232 PSP integrations, a cashier tier, and a set of core services running on EKS (AWS eu-central-1, ARM64) with GCP as a secondary region. You'll architect and build high-throughput backend services on modern Java and Spring Boot 3.x, onboard and mentor mid- and junior-level engineers, drive engineering standards, and partner with DevOps and Architects to deliver scalable, fault-tolerant solutions under real payment SLAs.

What We're Looking For

• 5+ years of backend Java experience; we run mostly Java 23 with newer services on Java 25, so fluency in modern Java (17+) is required.
• Production experience with Spring Boot 3.x, Spring Cloud, and the wider Spring ecosystem (Security, Data, OpenFeign, Actuator).
• Hands-on Apache Camel for EAI/integration — route design, DSL, and operating Camel under load (this is the integration backbone for our PSP tier).
• Experience with reactive Java — Spring WebFlux + Project Reactor + R2DBC — on latency-sensitive paths.
• Strong PostgreSQL skills with JPA/Hibernate (and ideally R2DBC), schema migrations via Liquibase.
• Kafka at scale — consumer-group design, delivery semantics, partition and rebalance tuning (AWS MSK or equivalent).
• Redis for caching, idempotency keys, and distributed locks (ShedLock or similar).
• Microservices, REST, OpenAPI-driven contracts, Maven build pipeline.
• Keycloak / OAuth2 / OIDC; secret management with Vault, External Secrets, or AWS Secrets Manager.
• Production AWS experience: EKS, MSK, RDS, ElastiCache, S3, CloudWatch, IAM/IRSA.
• Working knowledge of Docker, Kubernetes, Helm, and CI/CD (GitLab CI ideally).
• Solid grasp of high-load, fault-tolerant system design — circuit breaking, retries, back-pressure, p99 latency reasoning, capacity planning.
• Understanding of payment and financial systems.
• Strong communication, mentoring, and technical leadership skills.

Nice to Have

• Drools / DRL / decision tables (KIE Server experience a bonus) — used for routing, fraud/AML, and merchant-specific rules.
• OpenSearch for search and audit trails.
• Service mesh (Istio) and progressive delivery (Flagger / canary releases).
• Observability stack: Micrometer, Prometheus / VictoriaMetrics, Grafana, Datadog, OpenTelemetry.
• Infrastructure as Code with Terraform / Terragrunt.
• GitOps with Flux CD v2 and Helm.
• ARM64 / Graviton workloads, Karpenter-based autoscaling.
• AWS networking (VPC, Route 53, ELB) and security best practices.

What You'll Do

• Lead the design, development, and maintenance of Java microservices across the payments platform.
• Integrate and extend the new Payment Hub into our existing ecosystem.
• Drive code review, architectural decisions, and continuous improvement.
• Onboard and mentor junior and mid-level engineers — pair on real work, give thorough reviews, and help them level up.
• Champion best engineering practices: Testcontainers-first testing, observability, performance, secure coding, clean architecture.
• Run and present internal tech talks and share learnings across the team.
• Collaborate closely with DevOps on CI/CD, containerization, and infrastructure provisioning.
• Participate in on-call rotation for the services you own.

We Offer

• Fully remote work with a flexible schedule
• Paid sick leave and vacation
• Thoughtful gifts for holidays and personal milestones
• All equipment you need to do your job well
• Internal events: open discussions, product meetups, and soft-skills training
• Flat structure, no micromanagement, fast decision-making