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Backend Engineer

Fullstack Software Engineer

Island

Warsaw

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Описание вакансии

Island is the ideal environment for enterprise work, where security is everywhere without ever getting in the way.

The Island Enterprise Platform unifies AI enablement, network access, data protection, identity, and endpoint control into one coherent workspace—so organizations get universal visibility and control, and users get a fast, fluid, beautifully simple experience. It's not just a better way to secure work. It's a better way to work. Backed by investors like Coatue Management, Insight Partners, Sequoia Capital and Cyberstarts, and trusted by some of the largest, most respected enterprises on the planet, Island is redefining what the modern workplace can be.

Come join us in building something that's already changing how the world works

**Build the Future of Enterprise Software with Us**
We’re a team of passionate, high-caliber engineers and professionals from diverse backgrounds, united by a mission: to reinvent the modern workplace with technology that is both powerful and elegant. We believe great teams are built on talent, collaboration, and shared purpose—not just resumes. If you thrive on solving complex engineering challenges, building rock-solid software, and working with smart, driven people, you might be exactly who we’re looking for.

Ask Yourself:

  • Do I care deeply about writing clean, scalable, and maintainable code?
  • Do I take pride in building software that meets the highest standards of quality and reliability?
  • Do I enjoy collaborating with other top-talented engineers to push boundaries and create something truly impactful?

If you answered yes, let’s talk. This might be the opportunity both of us have been waiting for.

Why Join Us?

  • Collaborate with Brilliant Engineers: Work with professionals who value clean architecture, maintainable code, and long-term scalability.
  • Innovate with Modern Cloud Technologies: Focus on performance, resilience, and security at scale.
  • Commit to Quality: Build testable, high-quality software in an environment that prizes automation and best practices.
  • Solve Complex Challenges: Tackle problems at the intersection of security, infrastructure, and user experience.
  • Hybrid Work Environment: Enjoy the best of both worlds with our flexible, hybrid model based in a vibrant office in the Warsaw city center.

If you're excited by the idea of shaping the future of enterprise work—where security and productivity go hand in hand—we’d love to hear from you.

Requirements:

  • Core Engineering Expertise: Deep understanding of software engineering fundamentals including data structures, algorithms, code complexity, automated testing.
  • Proven Track Record: Significant experience delivering robust, scalable software in complex environments.
  • Problem Solving: Strong analytical skills to break down complex problems and design effective, efficient solutions.
  • Adaptability: Comfortable with evolving technologies and agile development practices.
  • Strong communication skills: Ability to present your work, communicate progress, ask for help and work within a team.

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Backend Engineer

Senior Tools Engineer

Elsewhere Entertainment

Warsawsenior

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Описание вакансии

Job Title
Senior Tools Engineer

Requisition ID
R026631

Job Description
Elsewhere Entertainment is looking for a talented
Senior Tools Engineer
to join our team and help shape the storytelling systems that will define our new AAA IP.

In this role, you’ll take ownership of designing and implementing powerful, user-friendly narrative tools that empower writers, cinematic designers, and quest designers to craft compelling, emotionally resonant, and highly interactive experiences. From complex branching dialogues to cinematic scene authoring and narrative logic systems, you’ll play a key role in building the tools that bring our stories to life.

You’ll help us by…

  • Designing, implementing, and maintaining tools that support cinematic design, branching dialogue systems, and narrative logic workflows.
  • Partnering closely with narrative designers, writers, cinematic teams, and gameplay engineers to understand their needs and deliver tools that enhance storytelling capabilities.
  • Supporting the development of a robust conversation editor and cinematic authoring environment that integrates with our gameplay and mission systems.
  • Building intuitive, non-destructive, and visual editing tools for branching dialogue, VO management, localization support, scene playback, and sequencing.
  • Identifying and improving narrative workflows and pipelines for greater productivity and iteration speed.
  • Maintaining and evolving our proprietary UI framework or integrating third-party solutions where appropriate.
  • Writing clean, reliable, and maintainable code that supports live authoring and rapid iteration.

You’re awesome because you have…

  • 4+ years of experience as a professional programmer, ideally with a focus on game development or tooling.
  • Solid knowledge of C++ and development best practices.
  • Experience building tools for narrative-driven games (dialogue editors, cinematic tools, scripting systems, etc.).
  • A strong understanding of branching story logic, dialogue trees, and cinematic pipelines in AAA productions.
  • Practical experience with UI frameworks such as Qt, ImGui, WPF, or similar, with an eye for building elegant and efficient authoring interfaces.
  • An appreciation for the needs of narrative and cinematic teams, with a user-focused mindset and an iterative approach to tool development.
  • Excellent communication and collaboration skills to bridge the gap between engineering and creative disciplines.
  • Passion for storytelling in games, and a desire to build the best possible experience for both players and creators.

Bonus points for…

  • Experience with cinematic or dialogue systems in games like The Witcher 3, Cyberpunk 2077, Dragon Age, or Mass Effect.
  • Familiarity with VO pipelines, localization workflows, and runtime scene playback.
  • Knowledge of narrative scripting languages or node-based visual scripting systems.
  • Experience working with narrative design tools such as Articy:Draft, Twine, Ink, or proprietary equivalents.
  • Understanding of Unreal Engine or other AAA game engines.
  • A deep love for interactive storytelling and narrative design in games.

Not sure you meet all the qualifications? Let us decide! Research shows that women and members of other under-represented groups tend to not apply to jobs when they think they may not meet every qualification, when, in fact, they often do! At Activision, we are committed to creating a diverse and inclusive environment and strongly encourage you to apply.

Our World
At Activision, we strive to create the most iconic brands in gaming and entertainment. We’re driven by our mission to deliver unrivaled gaming experiences for the world to enjoy, together. We are home to some of the most beloved entertainment franchises including Call of Duty®, Crash Bandicoot™, Tony Hawk’s™ Pro Skater™, and Guitar Hero®. As a leading worldwide developer, publisher and distributor of interactive entertainment and products, our “press start” is simple: delight hundreds of millions of players around the world with innovative, fun, thrilling, and engaging entertainment experiences.

We’re not just looking back at our decades-long legacy; we’re forging ahead to keep advancing gameplay with some of the most popular titles and sophisticated technology in the world. We have bold ambitions to create the most inclusive company as we know our success comes from the passionate, creative, and diverse teams within our organization.

We’re in the business of delivering fun and unforgettable entertainment for our player community to enjoy. And our future opportunities have never been greater — this could be your opportunity to level up.

Ready to Activate Your Future?

#elsewhere

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Backend Engineer

Regular Kotlin Developer (f/m/x)

Sii Poland

Katowice

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Описание вакансии

Join a team working on a modern fintech platform that supports company expense management.

The project focuses on developing a finance solution that enables seamless integration of financial tools (including payment cards, expense management, and invoice handling) directly into partner systems such as banks, accounting platforms, and HR solutions. The product allows companies to simplify financial processes, automate settlements, and gain full real-time control over their spending.

Your tasks

  • Designing, building, and maintaining microservices using Kotlin
  • Collaborating with cross-functional teams to deliver solutions across Platform, Services, SMB, and other domains
  • Supporting system performance monitoring and contributing to improvements in reliability and scalability
  • Participating in code reviews and maintaining high code quality standards
  • Contributing to the continuous improvement of code quality and system architecture
  • Troubleshooting and resolving technical issues

Requirements

  • Minimum 3 years of professional experience in software development
  • Hands-on experience with Kotlin in commercial projects
  • Experience building backend systems and working with microservices architecture
  • Basic experience with cloud environments (e.g., AWS, Kubernetes)
  • Experience with relational databases (e.g., PostgreSQL) as well as testing and observability tools (e.g., JUnit, Grafana)
  • Good command of English
  • Residing in Poland required

Job no. JOB-8ML93

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

  • Great Place to Work
  • Solid financial situation
  • Contracts with the biggest brands
  • Centre of internal trainings
  • Many experts you can learn from
  • Open and accessible management team
  • Profit sharing
  • Passion Sponsorship program
  • Regular integration events and trips
  • Comfortable and well-equipped offices
  • MySii app
  • Medical care

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Backend Engineer

Java Developer - Opportunity to Learn EIS

EY

Katowice

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Описание вакансии

Java Developer – Opportunity to Learn EIS
Location: Katowice - 2 days office / 3 days remote

Let us introduce you the job offer by EY GDS Poland – a member of the global integrated service delivery center network by EY.

The opportunity
As a Java Developer, you will contribute to the delivery of modern solutions within insurance platform implementation projects. You will collaborate closely with an agile team to support key technical streams and help deliver high‑quality features across the platform. In this role, you will work with contemporary technology stacks, gain exposure to enterprise‑grade integration patterns, and have the opportunity to expand your skill set into the highly sought‑after EIS ecosystem, with full training provided. This position offers a dynamic environment where you can grow your backend expertise while developing capabilities in a niche and in‑demand area of Insurance Technology.

Your Key Responsibilities
Work as a Java Developer to contribute in various streams of implementation in Insurance projects:

  • Assist in the development and implementation of Java applications for Insurance projects.
  • Collaborate with team members to support project objectives.
  • Help analyze requirements and contribute to the design process.
  • Participate in coding, testing, debugging, and documenting software applications.
  • Learn from and support senior team members in technical tasks.
  • Java Consulting implementation projects with a focus on developing new solutions and expanding system functionalities within the scope of R&D activities.
  • Cooperating with R&D teams to identify and implement best practices and new Java technologies/solutions that may enhance the efficiency of business processes.
  • Reporting the progress of R&D projects and documenting the results of implementations, as well as post-implementation review.
  • Designing, testing, and implementing new Java solutions/modules – conducting workshops, pilots, proof-of-concept initiatives, and deploying new or improved system features.
  • Gain hands‑on exposure to EIS through internal training paths and on‑the‑job learning, progressively contributing to EIS‑related configuration, integration, and extension tasks.
  • Support senior EIS specialists in developing platform integrations and backend logic, enabling transition toward EIS specialization over time.
  • Participate in the cross‑skilling journey toward Guidewire technologies, expanding competencies in insurance domain platforms and enterprise‑grade architecture.

Skills And Attributes For Success

  • Knowledge of Java programming.
  • Good communication skills and a willingness to learn.
  • Problem-solving mindset and ability to work independently.

To qualify for the role, you must have

  • Bachelor's degree in Engineering, IT, Science, other Technical qualification
  • 3+ years in a corporate IT environment in a similar positions
  • Understanding of Java and related frameworks.
  • Strong communication skills

Ideally, you’ll also have

  • Exposure to microservices architecture.
  • Interest in the Insurance or Banking sector.
  • Familiarity with Insurance core platforms is a plus.
  • Relevant coursework or certifications in Java, Spring, SQL, AWS, or Azure.
  • Experience with agile/scrum methodologies is advantageous.

What We Look For

  • Motivated Java Developer eager to learn and grow within complex backend and integration projects.
  • Openness to developing new skills, including the opportunity to transition into the EIS ecosystem with full training provided.
  • Willingness to collaborate, support team members, and contribute to a positive, knowledge‑sharing environment.
  • Curiosity about the insurance domain and interest in modern enterprise platforms.
  • Desire to expand technical capabilities in an international, agile setting and work with modern technologies across Java, Cloud, and integration solutions.
  • Problem‑solving mindset, proactive approach, and readiness to take ownership of assigned tasks.
  • Strong communication skills and willingness to engage with cross‑functional and multicultural teams.
  • Interest in long‑term career development, including opportunities to build expertise in niche and high‑demand technologies.

What We Offer
EY Global Delivery Services (GDS) is a dynamic and truly global delivery network. We work across nine locations – Argentina, Hungary, India, the Philippines, Poland, Sri Lanka, Mexico, Spain and the United Kingdom – and with teams from all EY service lines, geographies and sectors, playing a vital role in the delivery of the EY growth strategy. From accountants to coders to advisory consultants, we offer a wide variety of fulfilling career opportunities that span all business disciplines. In GDS, you will collaborate with EY teams on exciting projects and work with well-known brands from across the globe. We’ll introduce you to an ever-expanding ecosystem of people, learning, skills and insights that will stay with you throughout your career.

  • Continuous learning: You’ll develop the mindset and skills to navigate whatever comes next.
  • Success as defined by you: We’ll provide the tools and flexibility, so you can make a meaningful impact, your way.
  • Transformative leadership: We’ll give you the insights, coaching and confidence to be the leader the world needs.
  • Diverse and inclusive culture: You’ll be embraced for who you are and empowered to use your voice to help others find theirs.

About EY
EY | Building a better working world
EY exists to build a better working world, helping to create long-term value for clients, people and society and build trust in the capital markets.

Enabled by data and technology, diverse EY teams in over 150 countries provide trust through assurance and help clients grow, transform and operate.

Working across assurance, consulting, law, strategy, tax and transactions, EY teams ask better questions to find new answers for the complex issues facing our world today.

If you can demonstrate that you meet the criteria above, please contact us as soon as possible.
The Exceptional EY Experience. It’s Yours To Build.
In compliance with the requirements of the Whistleblower Protection Act, our company has established the Procedure for reporting breaches of law and undertaking appropriate follow-up actions. Any misconduct should be reported through the EY Ethics Hotline.

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Backend Engineer

Python Counterparty Credit Risk Senior Developer - VP

Citi

Warsawsenior

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Описание вакансии

Job Description

  • ACE Quant Development Team is a group within Citi's Financial, Market & Credit Risk Technology group, responsible for developing the analytical models which are used for derivatives credit risk and exposure calculations Firm-wide.
  • The team's primary focus is the development, testing, deployment, and maintenance of the production derivatives credit risk application, used for internal risk management and regulatory capital purposes.
  • The Counterparty Credit Risk Senior Application Developer position is a senior role that will interface closely with Quant and Front Office technology teams to integrate pricing model and workflow enhancements within the ACE application. There will be exposure to a wide range of technological frameworks, including distributed computing architecture.
  • Key responsibilities will include identifying and implementing optimizations with respect to the execution run-time and consolidating development across asset classes.

This is an excellent opportunity to work with a wide range of advanced technology paradigms including grid computing. It will also provide significant opportunities to collaborate with teams in the broader internal network including Front Office Technology, Quant groups, Risk Managers to ensure integration of new technology features and quant library updates into the codebase.

The role will involve tasks such as:

  • Development and maintenance of the ACE Python application. Assist with transition to cloud
  • Identifying and developing calculation optimization improvements
  • Working with Front Office teams to integrate quant library/technology enhancements into the codebase
  • Supporting the build, testing and release management of the credit risk application
  • Work on Regulatory and Governance based projects across a range of the asset classes
  • Providing regular development updates to stakeholders
  • Performing data analysis and producing regular reports
  • Take ownership and proactively follow up on issues if they arise

Experience:

  • Solid mathematical finance and statistical analysis skills
  • Knowledge of probability and stochastic calculus
  • Thorough and detailed approach to accuracy are essential
  • Ability to follow procedures and operate within strict guidelines
  • Excellent verbal and written English
  • Ability to work in a team and to work well under pressure

Technical

  • Excellent command of programming using Python
  • Experience developing software for Windows and Linux
  • Good command of scripting using UNIX Shell (ksh, bash, etc)
  • Experience working collaboratively within large development teams
  • Proficiency with version control software like Git, TortoiseSVN
  • Familiarity with CI/CD pipeline technologies like Jenkins preferable
  • Outstanding analytical and problem-solving skills

Beneficial

  • Familiarity with Numerical analysis/Monte-Carlo methods is a plus
  • Experience working on Regulatory based projects such as Model Risk, Basel III, Stress Testing, FRTB, CCAR is an advantage
  • Proven track record of developing and supporting analytics library for derivatives pricing and risk. In depth knowledge of Rates, Credit, Equities, Commodities derivatives is an advantage

Education:

  • Degree educated with Master’s degree (PhD preferred) or equivalent in computer science, mathematics, engineering or physics or relevant experience operating in a similar role

What we can offer you:
By joining Citi Solutions Center Poland, you will not only be part of a business casual workplace with a hybrid working model (currently up to 2 days working at home per week), but also (potentially, subject to final offer) receive a competitive base salary and enjoy a whole host of additional benefits which can include:

  • Employer paid Defined Contribution Pension Plan contribution of 6% of employee’s pensionable earnings (PPE Program)
  • Employer paid Private Medical Care Package for employees and Private Medical Care Packages for certain family members available at preferential rates
  • Employer paid Life Insurance Program for employees and Life Insurance for certain family members available at preferential rates
  • Employee Assistance Program financed by Employer
  • Paid Parental Leave Program (maternity and paternity leave; statutory and 2 weeks additional paid paternity leave)
  • Sport Card for employees subsidized via Social Benefits Fund and Sport Cards for certain family members available at preferential rates
  • Additional benefits from Company’s Social Benefit Fund, in particular: Holidays Allowance, support for sport and cultural activities, team building events.
  • Additional day off for volunteering
  • Cafeteria/ flex benefit – a company benefits system which enables employees to select and purchase benefits offered by a provider and available for employees on the platform.
  • Opportunity to receive an annual discretionary incentive award
  • Special offers and discounts for employees
  • Copy and paste the URL below into a new tab on your web browser to view the Remuneration Regulations extract: https://tbcdn.talentbrew.com/company/287/cms/v3/docs/policies/RemunerationRegulations\-KeyProvisions\-CitibankEurope\_plc\_05012025\_A.pdf

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self every day. We want the best talent around the world to be energized to join us, motivated to stay, and empowered to thrive.

Sounds like Citi has everything you need? Then apply to discover the true extent of your capabilities.

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

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Job Family Group:
Technology

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Job Family:
Applications Development

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Time Type:
Full time

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Primary Location Full Time Salary Range:
zł268,390.00 - zł457,010.00

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Most Relevant Skills
Please see the requirements listed above.

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Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.
If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review
Accessibility at Citi.
View Citi’s EEO Policy Statement and the Know Your Rights poster.

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Fullstack Software EngineerIsland · Poland

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