About the Role:

Your Impact:

• Develop and enhance Kotlin-based backend services that power Wrike’s mobile application
• Contribute to the core platform, including APIs, business logic, and performance optimizations tailored for mobile use cases
• Collaborate closely with iOS, Android, QA, product, and design teammates to deliver high-quality features
• Participate in code reviews and peer reviews to maintain engineering quality and consistency
• Help evolve the mobile backend service and propose innovative technical solutions using Kotlin
• Support the delivery of a reliable, scalable, and user-friendly mobile experience for Wrike customers

Your Qualifications:

• 4–6 years of software development experience using Java, Spring, MyBatis, PostgreSQL, and Maven
• Production experience building backend systems and services
• Good understanding of backend architecture, SOLID principles, and REST APIs
• Strong knowledge of SQL and API design
• Ability to keep solutions simple, scalable, and maintainable
• Strong communication skills in English
• Commitment to continuous learning and improvement
• At least 1 year of production experience with Kotlin is preferred

Standout Qualities:

• Experience working closely with mobile engineering teams
• Experience working in global or distributed teams
• Background in SaaS products or enterprise software
• Proactive approach to technical decision-making and implementation
• Ability to identify weaknesses in current solutions and suggest meaningful improvements
• Strong collaborative mindset and willingness to partner across teams to achieve shared goals
• Positive attitude that contributes to a fun, productive, and supportive team environment

Team Dynamics:

Our Work Style:

Why Join Wrike?

• 25 calendar days of paid vacation
• Sick Leave Compensation (5 Paid Uncertified Sick Days)
• Parental Leave: 18 Weeks Maternity / 4 Week Paternity 
• 2 Volunteer Days
• Medical Insurance (Employees + Dependents)
• Hybrid Working Model
• School Allowance (Up to €600/month for school aged kids)
• Simcard w/ Unlimited Internet Access for active employees
• Office Lunch Allowance (via Wolt) on Wednesdays / Thursday

What’s Next?

• Interview with a Recruiter 30mins
• Technical interview 105 mins
• Cultural interview 90 mins

Your recruitment buddy will be Aleksandar Chernev, Senior Technical Recruiter.

#LI-AC1

About the Role:

Your Impact:

• Develop and enhance Kotlin-based backend services that power Wrike’s mobile application
• Contribute to the core platform, including APIs, business logic, and performance optimizations tailored for mobile use cases
• Collaborate closely with iOS, Android, QA, product, and design teammates to deliver high-quality features
• Participate in code reviews and peer reviews to maintain engineering quality and consistency
• Help evolve the mobile backend service and propose innovative technical solutions using Kotlin
• Support the delivery of a reliable, scalable, and user-friendly mobile experience for Wrike customers

Your Qualifications:

• 4–6 years of software development experience using Java, Spring, MyBatis, PostgreSQL, and Maven
• Production experience building backend systems and services
• Good understanding of backend architecture, SOLID principles, and REST APIs
• Strong knowledge of SQL and API design
• Ability to keep solutions simple, scalable, and maintainable
• Strong communication skills in English
• Commitment to continuous learning and improvement
• At least 1 year of production experience with Kotlin is preferred

Standout Qualities:

• Experience working closely with mobile engineering teams
• Experience working in global or distributed teams
• Background in SaaS products or enterprise software
• Proactive approach to technical decision-making and implementation
• Ability to identify weaknesses in current solutions and suggest meaningful improvements
• Strong collaborative mindset and willingness to partner across teams to achieve shared goals
• Positive attitude that contributes to a fun, productive, and supportive team environment

Team Dynamics:

Our Work Style:

Why Join Wrike?

• 5 Weeks of paid vacation
• Sick Leave Compensation 
  • 5 Paid Uncertified Sick Days
  • 2 weeks fully paid w/ medical certificate, additional 
  • 4 weeks paid at 80% salary rate
• Parental Leave (fully paid): 18 Weeks Maternity / 4 Week Paternity 
• 2 Volunteer Days
• Meal Vouchers (CZK 220 per working day)
• Annual Prague Travel Card (Lítačka)
• Hybrid Working Model
• Benefit budget with flexible options, including a MultiSport card, Canadian Medical membership, contributions to a pension savings plan and additional choices available through Benefit Plus

What’s Next?

• Interview with a Recruiter 30mins
• Technical interview 105 mins
• Cultural interview 90 mins

Your recruitment buddy will be Aleksandar Chernev, Senior Technical Recruiter.

#LI-AC1

More about Wrike Team

At Wrike, everyone’s voice matters - our Scrum teams (with FE, BE, QA, UI, UX, and a PO) are at the heart of decision-making. Backend engineers in product teams handle both business logic and technical challenges, while technical teams ensure smooth internal tooling, CI/CD, and a great developer experience. We invest in our architecture, deploy daily with hardly any merge conflicts, and encourage backend engineers to change things up, work on technical improvements, and help shape product plans by sharing ideas with POs. As we move toward a microservice architecture, product teams enjoy more ownership and flexibility, with support from the technical teams. Our goal is to make clients’ lives easier by building simple, powerful solutions that work for everyone - from startups to large enterprises.

Are you a passionate Backend Engineer? This isn’t a typical job posting - it’s an invitation to connect with Wrike for future possibilities. By joining our talent pool, you can introduce yourself and learn more about our culture, projects, and technology. We’re always eager to meet talented professionals, even if we don’t have an open position right now. Apply today if you’d like to start a conversation and discover more about life at Wrike.

What We’re Working On:

• Designing, building, and improving product features from the ground up or enhancing existing ones
• Tackling complex challenges together and refining solutions as a team
• Ensuring high technical quality through code reviews, testing, and task estimation
• Embracing fast, iterative development and following best practices
• Using AI tools daily to automate tasks and boost productivity
• Continuously learning and supporting each other’s growth

Our Stack:

• Java (21), Spring, REST APIs, SQL
• PostgreSQL, Redis, RabbitMQ
• Unit/integration testing, Java web stack
• AI tools (Cursor, Zencoder, etc; internal AI portal; internal MCP)

Why Join Wrike? 

• 25 calendar days of paid vacation
• Sick Leave Compensation (5 Paid Uncertified Sick Days)
• Parental Leave: 18 Weeks Maternity / 4 Week Paternity 
• 2 Volunteer Days
• Medical Insurance (Employees + Dependents)
• Hybrid Working Model
• School Allowance (Up to €600/month for school aged kids)
• Simcard w/ Unlimited Internet Access for active employees
• Office Lunch Allowance (via Wolt) on Wednesdays / Thursdays

Interested in joining Wrike when the right opportunity opens up? Apply to our Senior Backend Engineer Talent Pool today. We’ll reach out as soon as a suitable role becomes available, or simply to arrange a Meet & Greet call.

Your recruitment buddy will be Alexandra Vorobyova, Lead Recruiter.

#LI-AV1

More about Wrike Team

At Wrike, everyone’s voice matters - our Scrum teams (with FE, BE, QA, UI, UX, and a PO) are at the heart of decision-making. Backend engineers in product teams handle both business logic and technical challenges, while technical teams ensure smooth internal tooling, CI/CD, and a great developer experience. We invest in our architecture, deploy daily with hardly any merge conflicts, and encourage backend engineers to change things up, work on technical improvements, and help shape product plans by sharing ideas with POs. As we move toward a microservice architecture, product teams enjoy more ownership and flexibility, with support from the technical teams. Our goal is to make clients’ lives easier by building simple, powerful solutions that work for everyone - from startups to large enterprises.

Are you a passionate Backend Engineer? This isn’t a typical job posting - it’s an invitation to connect with Wrike for future possibilities. By joining our talent pool, you can introduce yourself and learn more about our culture, projects, and technology. We’re always eager to meet talented professionals, even if we don’t have an open position right now. Apply today if you’d like to start a conversation and discover more about life at Wrike.

What We’re Working On:

• Designing, building, and improving product features from the ground up or enhancing existing ones
• Tackling complex challenges together and refining solutions as a team
• Ensuring high technical quality through code reviews, testing, and task estimation
• Embracing fast, iterative development and following best practices
• Using AI tools daily to automate tasks and boost productivity
• Continuously learning and supporting each other’s growth

Our Stack:

• Java (21), Spring, REST APIs, SQL
• PostgreSQL, Redis, RabbitMQ
• Unit/integration testing, Java web stack
• AI tools (Cursor, Zencoder, etc; internal AI portal; internal MCP)

Why Join Wrike? 

• 5 Weeks of paid vacation
• Sick Leave Compensation 
  • 5 Paid Uncertified Sick Days
  • 2 weeks fully paid w/ medical certificate, additional 
• 4 weeks paid at 80% salary rate
• Parental Leave (fully paid): 18 Weeks Maternity / 4 Week Paternity 
• 2 Volunteer Days
• Meal Vouchers (CZK 220 per working day)
• Annual Prague Travel Card (Lítačka)
• Hybrid Working Model
• Benefit budget with flexible options, including a MultiSport card, Canadian Medical membership, contributions to a pension savings plan and additional choices available through Benefit Plus

Interested in joining Wrike when the right opportunity opens up? Apply to our Senior Backend Engineer Talent Pool today. We’ll reach out as soon as a suitable role becomes available, or simply to arrange a Meet & Greet call.

Your recruitment buddy will be Alexandra Vorobyova, Lead Recruiter.

#LI-AV1

We’re expanding the IntelliJ Ultimate team — the group responsible for delivering world-class development experiences for enterprise Java and Kotlin projects. Our work powers the seamless integration of frameworks and libraries like Spring, Quarkus, and Hibernate, and enables millions of developers to build, debug, run, and deploy complex enterprise applications with confidence and productivity.

We’re now looking for a Senior Software Engineer to take ownership of core functional areas within IntelliJ IDEA Ultimate. The successful candidate will join a team of highly skilled engineers dedicated to evolving the IDE’s capabilities for professional Java and Kotlin development.

In this role, you will:

• Take end-to-end ownership of IntelliJ IDEA Ultimate features and subsystems related to enterprise frameworks, build tools, runtime configurations, and application servers.
• Design and implement advanced tooling for Java, Kotlin, Spring, and related ecosystems.
• Collaborate closely with other senior engineers and tech leads to ensure architectural consistency and technical excellence in all areas of IntelliJ IDEA.
• Drive innovation and usability improvements in large-scale, production-grade developer tools.
• Contribute to maintaining IntelliJ IDEA’s reputation for quality, reliability, performance, and developer delight.

We’ll be happy to have you on our team if you have:

• Strong expertise in Java and Kotlin, with a deep understanding of the JVM.
• Solid experience with the Spring ecosystem and/or other popular enterprise frameworks and libraries, including their configuration, deployment, and runtime models.
• A proven track record of working on complex systems, large-scale codebases, or developer tooling.
• The ability to design, maintain, and evolve clean, extensible, and well-architected software.
• A genuine interest in IDE internals, language tooling, and improving the developer experience.
• Excellent communication and collaboration skills — you’ll work with top engineers and multiple IntelliJ IDEA subsystems.

If you join us, you’ll get to:

• Shape the future of enterprise development tooling in one of the world’s most advanced IDEs.
• Work on technologies that directly impact millions of professional developers.
• Collaborate with some of the best engineers in the developer tools industry.
• Enjoy broad technical ownership and opportunities for architectural influence.
• Receive top-tier compensation and benefit from a flexible work environment.

Why join JetBrains?

• Strong base salary. We offer competitive pay that reflects your skills and experience.
• Flexible work location. Enjoy the freedom to work from home or from the office.
• Remote work. Spend up to 30 days per year working remotely from abroad.
• Extra time off. More days to relax, recharge, and do the things you love.
• Medical insurance allowance. Enjoy peace of mind for you and your family.
• Learning and development opportunities. Access to conferences, courses, and language classes.
• Language classes. Pick up the local language or sharpen your English skills.
• Fuel your day. Enjoy a hot meal or receive a lunch allowance on workdays.
• Mental health support. To help you feel your best, we provide easy access to professional mental health services.
• Sports benefit. Enjoy an on-site gym or sports club stipend.
• Internal events. Join company-wide celebrations and team gatherings.

*Some benefits may vary depending on location.

At JetBrains, code is our passion. Ever since we started, back in 2000, we've been striving to make the strongest, most effective developer tools on earth. Today, AI-powered coding agents are becoming a core part of how developers write Kotlin – and we want to make sure they write it well.

The Kotlin AI Value Stream team is responsible for how AI agents understand, generate, and improve Kotlin code across all platforms: Android, Kotlin Multiplatform, server-side, web, desktop, and others. We build the evaluation infrastructure, error analysis tools, and post-training pipelines that measure and improve agent behavior on real Kotlin developer tasks.

As a Research Engineer on this team, you'll own the end-to-end loop: Analyze how agents fail on Kotlin → build evals that capture those failures → research and implement methods to fix them → measure the improvement. Your work will directly shape how millions of developers experience Kotlin through AI coding agents.

As part of our team, you will:

Build tools for agentic error analysis

• Design and implement tooling to systematically capture, classify, and analyse errors that AI coding agents make when generating Kotlin code.
• Build observability pipelines over agentic traces – mining patterns from agent sessions in JetBrains IDEs, Junie, Claude Code, Cursor, and other coding agents.

Build evaluation pipelines

• Design, implement, and maintain evaluation pipelines that measure Kotlin code generation quality across dimensions, including correctness, idiomaticity, build success, framework usage, and test coverage.
• Build simulation environments where coding agents can be measured on realistic Kotlin developer tasks – from greenfield KMP projects and Gradle dependency management to migrating Spring applications from Java to Kotlin.
• Own evaluation infrastructure: metrics, experiment tracking, automated regression checks, and reproducible benchmarking.

Research methods for improving agent and model behavior on Kotlin

• Experiment with post-training techniques (SFT, DPO, GRPO) to improve how models handle Kotlin-specific patterns, idioms, and frameworks.
• Investigate context engineering approaches: CLAUDE.md/AGENTS.md files, compiler-as-verifier feedback loops, Kotlin LSP integration, and MCP-based tooling.
• Run experiments to measure impact: A/B comparisons, benchmark suites, and before/after analyses on real codebases.
• Collaborate with model providers (Anthropic, OpenAI, and Google) to translate Kotlin-specific findings into model improvements.

Build public Kotlin benchmarks

• Design and build open-source benchmarks that measure AI coding agent performance on Kotlin tasks and eventually become the standard reference for the ecosystem.
• Create task datasets covering the breadth of Kotlin usage: the server side (Spring, Ktor), multiplatform projects (KMP), build systems (Gradle), Android, library development, and others.
• Include both mined real-world tasks and carefully designed synthetic tasks that test specific Kotlin capabilities.
• Maintain and evolve benchmarks as models improve, ensuring they remain challenging, relevant, and contamination-resistant.

We'll be happy to have you on board if you have:

• Hands-on experience building evaluation or analysis pipelines for LLMs or AI coding agents in a research or production setting.
• Strong Python engineering skills (at least three years), with the ability to write clean, maintainable code in data-heavy and ML-adjacent codebases.
• Experience with data analysis at scale: querying large datasets (SQL/Athena), building data pipelines, and performing statistical analysis of experimental results.
• The ability to own projects end to end – from identifying a problem in agent traces to designing an eval, running experiments, and shipping a fix.
• A product-aware mindset: You care about how agents are actually used by developers and can translate real failure modes into evaluation and training work.
• Familiarity with Kotlin or a strong willingness to develop deep Kotlin expertise (you'll be living in Kotlin codebases daily).

Our ideal candidate would also have experience with:

• Post-training LLMs: SFT, RLHF, DPO, GRPO – either hands-on training or designing the data and reward pipelines that feed into training.
• Modern deep learning frameworks (PyTorch) and LLM training stacks (TRL, verl, Megatron, or similar).
• AI agent development: tool-using agents, multi-step coding workflows, agentic frameworks.
• Evaluation frameworks and tools: Inspect AI, Promptfoo, LM-evaluation-harness, or custom eval pipelines.
• Experiment tracking and observability: Weights & Biases, MLflow, Langfuse, or similar.
• The Kotlin ecosystem: Android, Gradle, KMP, Spring, Ktor – with an understanding of the developer workflows that agents need to support.
• Contributing to or maintaining open-source projects, especially benchmarks or evaluation tools.

Don't check every box? That's okay – if you're excited about this work and bring strong fundamentals, we'd love to hear from you. We're happy to talk and provide the training you need to grow into the role.

Why join JetBrains? 

• Strong base salary. We offer competitive pay that reflects your skills and experience.
• Flexible work location. Enjoy the freedom to work from home or from the office.
• Remote work. Spend up to 30 days per year working remotely from abroad.
• Extra time off. More days to relax, recharge, and do the things you love.
• Medical insurance allowance. Enjoy peace of mind for you and your family
• Learning and development opportunities. Access to conferences, courses, and language classes.
• Relocation support. We help make your move as smooth and stress-free as possible. 
• Language classes. Pick up the local language or sharpen your English skills.
• Fuel your day. Enjoy a hot meal or receive a lunch allowance on workdays.
• Mental health support. To help you feel your best, we provide easy access to professional mental health services.
• Sports benefit. Enjoy an on-site gym or sports club stipend.
• Internal events. Join company-wide celebrations and team gatherings.

*Some benefits may vary depending on location.

#LI-DNI