Full Stack Software Developer (Kotlin/React)

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TechTree is recruiting for on behalf of one of our clients
.

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About The Role
We're seeking a
Full Stack Engineer
to join the core platform engineering team, focusing on developing, scaling, and maintaining mission-critical software for defense logistics. This role involves integrating with legacy systems and supporting high-impact workflows, directly contributing to the reliability and scalability of our platform.

What You'll Be Doing

• Design, develop, and maintain full-stack application functionality across frontend interfaces, backend services, and APIs.
• Implement integrations with external systems, including legacy government and enterprise platforms.
• Collaborate with forward-deployed teams to translate customer requirements into production-ready features.
• Ensure code quality through best practices, testing, documentation, and code reviews.
• Support the onboarding and technical development of new engineering team members.

What We're Looking For

• Experience delivering real projects and products to production.
• Strong proficiency in TypeScript and JavaScript, with experience in at least one frontend framework such as React, Svelte, or Next.js.
• Solid knowledge of SQL databases, preferably PostgreSQL.
• Strong understanding of software engineering best practices.
• Ability to work effectively in fast-paced, high-accountability environments.
• Willingness to relocate to the US - mandatory

Compensation & Benefits

• Salary range: $75,000 – $120,000 depending on experience.
• Equity: 0.05% – 0.3% real equity.
• Onsite work model based in Warsaw.

About The Company
Our client is building the AI-native command centre for defence logistics, transforming outdated infrastructure into a streamlined platform that eliminates manual bottlenecks in national security workflows. At seed stage, they are rapidly expanding their core engineering team to scale the platform.

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Company Description
Sopra Steria
is one of the largest players in the tech industry in Europe, known for its consulting, digital services and software development. We operate in nearly 30 countries in the world, hiring more than 55,000 employees.

The Polish branch, as the Global Delivery Center, operates in Katowice since 2007 and has been growing ever since. Currently, our team consists of around 1,000 specialists.

Within the Digital Platform Services department, our teams specialize in areas such as cloud, operating systems, virtualization, databases, backup or storage, as well as networking and security. We also have 1st line support consultants who speak French and English, but also Italian, Spanish, Portuguese and German.

The Application Services department is responsible for areas such as software development, data engineering, testing services, CRM, ITSM and ERP platform integrations, as well as application management for customers in Scandinavia, Benelux, France, Germany, Switzerland and the UK.

Job Description
We are looking for a
ServiceNow Developer
to join the
Sopra Steria Polska
team and contribute to the projects for our clients.

Note that we can only offer cooperation to people who are located in Poland and have EU citizenship.
Responsibilities:

• Participate in ServiceNow implementation, enhancement, and optimization projects.
• Analyze business requirements and translate them into scalable ServiceNow solutions.
• Design, configure, and develop solutions on the ServiceNow platform, primarily within the ITSM module.
• Develop and maintain workflows, integrations, catalog items, business rules, script includes, and other custom platform components.
• Implement new functionalities and enhancements in accordance with business and technical requirements.
• Troubleshoot complex issues, perform root cause analysis, and implement long-term solutions.
• Review, optimize, and refactor custom code to ensure performance, maintainability, and compliance with ServiceNow best practices.
• Support platform upgrades, patches, and releases, including testing and validation activities.
• Monitor and maintain integrations and APIs to ensure reliable platform operations.
• Maintain up-to-date technical documentation for configurations, integrations, and custom developments.
• Collaborate with stakeholders, consultants, and Agile teams to deliver high-quality solutions.
• Recommend and implement continuous improvements to enhance platform functionality, performance, and user experience.

Qualifications
Qualifications

Must Have Requirements

• 4+ years of hands-on experience with the ServiceNow platform.
• ServiceNow CSA (Certified System Administrator) certification.
• Strong experience and deep knowledge of ServiceNow ITSM.
• Advanced JavaScript scripting skills.
• Experience working in Agile/Scrum environments and familiarity with ITIL practices.
• Strong problem-solving and analytical skills.
• Fluent English B2/C1.
• Strong communication skills to collaborate with cross-functional teams.
• Proactive and detail-oriented.
• Ability to document processes and share knowledge effectively.
• Being open to occasional business trips abroad and visits in our office in Katowice.

Nice to Have

• Additional ServiceNow certifications (e.g., CAD, CIS-ITSM, CIS-HRSD, CIS-ITOM).
• Experience with other ServiceNow modules, such as HRSD, SLO, ITOM, or similar.
• French B2/C1.

Additional Information
What we offer:

• BENEFITS (UoP): Luxmed, Medicover Sport, Worksmile, educational platforms, languages learning platform, referral bonus, [copyrights* tbc], life insurance, certifications (paid by the company), conferences, Tech Lunches, possibility to join our Communities (Project Management, Architecture, Security, Process Management, Leadership, AI and Cloud), local kindergarten.

ADDITION: free parking, fresh fruits, workation.

In case of questions, please contact the HR team.

The recruitment process for this position consists of two stages:

• a short phone call with a recruiter (30 min max)
• one-hour long interview on Teams (with both general and technical questions)

Salary range:
UOP: 12 000 -16 000 PLN gross/month;

All information about salary range and its additional components will be provided during the 1st stage of recruitment process.

At our organization, we are committed to fighting against all forms of discrimination. We foster a work environment that is inclusive and respectful of all differences.

Minimum qualifications:

• Bachelor's degree in Electrical Engineering, Computer Science, with an emphasis on AI/ML, a relevant technical field, or equivalent practical experience.
• 5 years of experience in software development.
• 5 years of experience leading ML design and optimizing ML infrastructure (e.g., model deployment, model evaluation, data processing, debugging, fine tuning).
• 2 years of experience with GenAI techniques (e.g., LLMs, Multi-Modal, Large Vision Models) or with GenAI-related concepts (language modeling, computer vision).

Preferred qualifications:

• 5 years of experience testing, and launching software products, and 3 years of experience with software design and architecture.
• Experience with agentic systems, ML domains such as reinforcement learning, image analysis or advanced statistics.
• Understanding of machine learning fundamentals.
• Ability in establishing and tracking meaningful metrics for ML system performance and reliability.
• Passion for coaching and mentoring team members.

About The Job
Google's software engineers develop the next-generation technologies that change how billions of users connect, explore, and interact with information and one another. Our products need to handle information at massive scale, and extend well beyond web search. We're looking for engineers who bring fresh ideas from all areas, including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and mobile; the list goes on and is growing every day. As a software engineer, you will work on a specific project critical to Google’s needs with opportunities to switch teams and projects as you and our fast-paced business grow and evolve. We need our engineers to be versatile, display leadership qualities and be enthusiastic to take on new problems across the full-stack as we continue to push technology forward.

With your technical expertise you will manage project priorities, deadlines, and deliverables. You will design, develop, test, deploy, maintain, and enhance software solutions.

We are a small, dynamic team at the forefront of generative AI. Our mission is to automate device operations across a variety of form factors (including phones, laptops, and tablets) and to derive insights from acquired data. Inspired by recent AI advancements, we aim to build agents capable of operating devices, at scale and with high efficiency and accuracy. We foster a collaborative environment where team members can learn from each other and contribute together.

ChromeOS delivers quality computing at scale to provide universal and unfettered access to information, entertainment, and tools. Our mission is to empower anyone to create and access information freely through fast, secure, simple, and intelligent computing.

Individual pay is determined by factors including job-related skills, experience, and relevant education or training.

Poland: zł364000 - zł374000 (PLN) + 15% bonus target + equity + benefits

Responsibilities
Learn more about benefits at Google .

• Design, develop, deploy, and maintain scalable machine learning systems for our device automation and app analysis platforms, with a focus on generative and agentic AI.
• Enhance and refine our AI-powered agents to improve their understanding and execution capabilities across various form factors.
• Define, establish, and track Key Performance Indicators (KPIs) and metrics to evaluate and iterate on the performance, quality, and reliability of our ML systems.
• Collaborate closely with other engineers in a fast-paced environment.
• Provide technical leadership, and mentor team members on machine learning best practices, fostering their growth and development.

Google is proud to be an equal opportunity workplace and is an affirmative action employer. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. See also Google's EEO Policy and EEO is the Law. If you have a disability or special need that requires accommodation, please let us know by completing our Accommodations for Applicants form .

Job Description
The Full Stack Engineer, MDS IIM, is a member of the Mondelez Digital Services (MDS) Digital R&D team. They work closely with the MSC Engineering teams to support the End-to-End (E2E) IIM process through project portfolio management solutions, engaging cross-functionally to ensure products deliver against defined business requirements.

Key Responsibilities

• Contribute towards the development of deployable IIM product increments
• Develop and/or configure front-end and back-end technology to satisfy product requirements
• Define technical tasks and accurately size and estimate the effort required to deliver technical solutions
• Assure software quality and perform end-to-end testing
• Support the troubleshooting of technical questions and issues
• Develop, build, configure, customise, integrate, and test high-quality solutions based on functional and technical requirements
• Adhere to business and technical standards, policies, and procedures throughout the software delivery lifecycle
• Follow Agile methodologies and principles through work outputs and behaviours
• Work collaboratively with Product Team members (e.g., Product Owner, Business Analyst) to ideate and shape software solutions

Key Interactions & Stakeholders

• Product Team – Collaborate to design, develop, document, and test technical solutions that satisfy product requirements
• Solution Architects – Shape complex solutions in line with technology capabilities and architectural standards
• Platform Team – Coordinate with Platform Owner and team members on requirements for product delivery
• Service Desk – Work together to resolve product incidents, problems, or queries that cannot be resolved in isolation
• Vendors / Suppliers – Consult selected third parties involved in the delivery of development, testing, and support services

Skills & Experience
Functional:

• Knowledge and understanding of product services and associated tools
• Strong knowledge of software engineering, information risk, security guidelines, and architecture standards
• Experienced in full stack engineering, automated deployment, and continuous integration
• Experience working with project portfolio management SaaS solutions, preferrable

Technical:

• Familiarity with JavaScript frameworks

Methodologies:

• Software delivery methodologies (e.g., Agile, Waterfall)
• DevOps deployment methodologies

Behaviour:

• Innovative and experimental
• Results orientated
• Strong communicator
• Able to quickly rationalise complex needs / issues
• Comfortable both working in and enabling diverse & inclusive teams

No Relocation support available

Business Unit Summary
At Mondelēz International, our purpose is to empower people to snack right by offering the right snack, for the right moment, made the right way. That means delivering a broad range of delicious, high-quality snacks that nourish life's moments, made with sustainable ingredients and packaging that consumers can feel good about.

We have a rich portfolio of strong brands globally and locally including many household names such as
Oreo
,
belVita
and
LU
biscuits;
Cadbury Dairy Milk
,
Milka
and
Toblerone
chocolate;
Sour Patch Kids
candy and
Trident
gum. We are proud to hold the top position globally in biscuits, chocolate and candy and the second top position in gum.

Our 80,000 makers and bakers are located in more than 80 countries and we sell our products in over 150 countries around the world. Our people are energized for growth and critical to us living our purpose and values. We are a diverse community that can make things happen—and happen fast.

Mondelēz International is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, gender, sexual orientation or preference, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law.

Job Type
Regular

Software & Applications

Technology & Digital