Jobs Poland, Fullstack

Transcenda is a global provider of design and engineering services. We put people first and strive to be agents of change by building a better future through technology. We are dedicated to empowering organizations to rapidly scale, digitally transform, and bring new products to market.

Recognized by Newsweek as one of America’s greatest workplaces of 2025, Transcenda is home to 200+ engineers, designers, analysts, and advisors solving complex business challenges through technology. By approaching our work through a variety of cultures and perspectives, we take calculated risks to design and develop innovative solutions that will have a positive impact tomorrow.

Interesting Facts:

• Over 200 team members
• Fully remote — we let people work where they work best.
• We work with clients who value our opinion and thought leadership, and where we can make a meaningful contribution to architectural decisions, engineering decisions, and product decisions.
• We have a strong social agenda and promote diversity and inclusion, and participate in a variety of charity initiatives throughout the year.
• We have fun team-building activities.
• Since we are rapidly growing, the ability to grow and advance your career is available and at a fairly quick rate.

Key responsibilities

• Design, build, and maintain efficient, reusable, and reliable code
• Designing APIs and building integrations
• Drive engineering from concept to finished product
• Contributions to architectural decisions

‍

Must haves

• 5+ years of professional experience in software development.
• C#/.NET 10 experience with a strong focus on backend & databases.
• Experience with building high-load applications.
• Experience in designing and building REST APIs.
• Proficient in PostgreSQL and database schema design.
• Testing automation culture and experience in writing unit and integration tests.
• Frontend / React.js experience.
• Upper Intermediate English level.

‍

Nice to have

• DevOps practices, CI/CD, and experience with Amazon Web Services (AWS).
• Experience in data-intensive architectures, ETL, and building data pipelines.

An experienced and highly skilled Full Stack Developer to lead the design, development, and optimization of scalable web applications. You will be responsible for driving architectural decisions, mentoring teams, and ensuring best practices across the full development lifecycle. The ideal candidate is a hands-on leader with deep technical expertise across ReactJS/Next.js and Node.js and has an advanced level of English.

Key Responsibilities

• Architecture & Design
• Lead the design and development of complex, scalable, and high-performance applications.
• Define and enforce coding standards, best practices, and architectural guidelines.
• Collaborate with architects, product managers, and business stakeholders to design system solutions.
• Development & Technical Leadership:
• Build end-to-end features using ReactJS/Next.js (frontend) and Node.js (backend).
• Design and implement APIs using GraphQL and REST where appropriate.
• Ensure test coverage and reliability through unit/integration testing with Jest. Mentorship & Team Collaboration:
• Mentor and guide engineers, ensuring continuous technical growth within the team.
• Collaborate with cross-functional teams, including UX/UI, QA, and DevOps.

• Lead technical discussions, proof of concepts, and design reviews.

   

Technical Expertise:

• Frontend: ReactJS, Next.js, modern UI design principles.
• Backend: Node.js
• Languages: TypeScript, JavaScript (ES6+).
• APIs: GraphQL, RESTful APIs.
• Testing: Jest, unit, and integration testing frameworks.

Preferred Skills:

• Experience with serverless architecture and event-driven systems.
• Familiarity with Agile/Scrum methodologies.
• Strong knowledge of performance optimization and security best practices.
• Experience with infrastructure as code (Terraform/CloudFormation).
• Excellent leadership, problem-solving, analytical thinking, and communication skills.

Job Responsibilities

Responsibilities:
1. Work with PEs of JD and ensure that
the initiatives are led and delivered to closure
2. Collaborate with the product managers , challenge them in terms of features, and keep the delivery timeline intact
3. Ensure that the solution is technically robust and scalable to meet all the fascia needs
4. Have Unit tests, integration tests, and mocks as part of the solution
5. Direct the teams in terms of development, testing, and integration
6. Be hands-on and write code, reviewthe  code of the team before it goes to the client
7. Zero tolerance towards bad coding practices and lack of tests
8. Look at the features to be independently deployable and released independently
9. Look at the cost optimization and scale optimization for the features deployed
10. Guide the team with the implementation in terms of tech, design, and be accountable for the
work package delivery

Department/Project Description

Global leader in sports fashion and streetwear retail, known for its wide range of premium brands, innovative product selection, and exceptional in-store and online experience. With a strong international presence and a commitment to trend-driven style, the client continues to shape the future of athletic and lifestyle fashion.

PIN-UP Global is an international company specializing in developing and implementing advanced technologies, B2B solutions, and innovative products.

We ensure certification and licensing of our products, providing customers and partners of the holding company with high-quality and reliable solutions.

PIN-UP Global is represented in Cyprus, Poland, Armenia, Peru, Malta. The holding’s headquarters is located in Cyprus.

We are looking for a Team Leader (Fullstack)!

Requirements:

• 6+ years of professional experience in fullstack software development using technologies like .NET, Angular/React.
• 1+ years of experience in a technical lead or team lead role.
• Proficiency in dotnet, ASP.NET MVC/Web API, and C#.
• Knowledge of frontend technologies Angular, React, Vue.
• Strong experience with PostgreSQL, and ORM/ODM tools.
• Experience with messaging systems (e.g., NATS, RabbitMQ) is preferred.
• Been familiar with best practices for monitoring of high loaded web applications.
• Experience with unit and integration testing.
• Strong understanding of security best practices and performance optimization.
• Experience with CI/CD pipelines and containerization technologies (Docker, Kubernetes).
• Working experience with one of cloud platforms AWS, Azure, GCP is required.
• Deep understanding of software architecture and design patterns.

Responsibilities:

• Lead, manage, and mentor a team of professionals, ensuring effective team collaboration and productivity;
• Set clear team objectives, delegate tasks, and monitor progress to ensure timely completion;
• Monitor team performance metrics and provide regular reports to senior management;
• Tracking functional and non-functional product quality attributes and implementing solutions for their improvement (proactively);
• Actively participating in the quantitative growth and scaling of the team, including conducting technical interviews;
• Introducing technical and technological improvements, optimizations, and innovations within the team;
• Ensuring the quality and approval of architectural solutions developed by the team, and their alignment with the overall system architecture;
• Design, develop, and maintain scalable services using .NET technologies (ASP.NET Core, Entity Framework Core) and Angular framework;
• Implementing solutions for technical debt within the project/product;
• Participating in development and independently implementing specific project tasks;
• Optimize application performance, scalability, and security;
• Ensure code quality through code reviews, unit testing, and adherence to coding standards;
• Establish and refine development processes and standards, ensuring efficiency and consistency;
• Participate actively in Agile processes, including sprint planning, estimations, and iterative improvements.

What are the conditions and bonuses?

🍀An exciting and challenging job in a fast-growing product holding, the opportunity to be part of a multicultural team of top professionals in Development, Engineering and Architecture, Management, Operations, Marketing, etc;

🤝Great working atmosphere with passionate IT experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed;

📍Beautiful offices in Warsaw, Limassol — work with comfort and enjoy the opportunity to build a network of connections with IT professionals day by day;

🧑‍💻Laptop & all necessary equipment for work according to the holding standards;

🏖Paid vacations, personal events days, days off;

🫖Paid sick leave;

👨‍⚕Medical insurance;

💵Referral program — enjoy cooperation with your colleagues and get a bonus;

📚Educational support by our L&D team: internal and external trainings and conferences, courses on Udemy;

🗣Free internal English courses;

🤸‍♀Sport benefit;

🦄Multiple internal activities: online platform with newsletters, quests, gamification, and presents for collecting bonuses, PIN-UP talks club for movie and book lovers, board games cozy evenings, special office days dedicated to holidays, etc;

🎳Company events, team buildings.

We’re a growing product team building modern web solutions in the fintech and entertainment domains.

We’re looking for a motivated Junior/Middle React / Node.js Developer who’s eager to learn from experienced mentors and grow into a strong Full-Stack Engineer.

📍 Location: Warsaw, Poland (on-site)
🕐 Start: ASAP
 

Requirements:

•  1–3 years of experience with React, Node.js, and TypeScript
•  Understanding of RESTful APIs and CRUD operations
•  Experience with PostgreSQL or MongoDB
•  Good knowledge of HTML5, CSS3 (and preprocessors like SCSS)
•  Familiarity with Git and Agile development
•  English: Intermediate or higher (spoken communication required)

Nice to have:

• Familiarity with CI/CD pipelines
• Basic Docker or AWS experience

Responsibilities:

• Development and maintenance of Front-end applications using React and Web Components;
• Development Backend using Node.js
• Optimization of application performance and scalability.
• Testing and debugging of code.
• Participation in technical discussions and collaborative development.

CONDITIONS:

— The trial period lasts 3 months;

— 15 vacation days per year included (1.25 days are charged every month);

— 5 sick days per year included.
 

We offer:

• On-site position in Warsaw
• Mentorship from senior developers
• Real growth path from Junior to Middle level
• Friendly team and stable environment
• Competitive salary (discussed individually)

💬 If you are ready to join our team and work on exciting projects in Full-Stack development using React / Node.js, we invite you to submit your resume. Join us and showcase your talent in building high-quality, scalable web and mobile applications.

This is NOT a traditional developer role.
We’re not looking for someone who writes code all day — we’re looking for someone who leads AI agents that write code for you.

This is not “a regular dev job with an AI assistant”.
This is a role for a person who thinks in systems, prompts, and outcomes, not in endless manual coding.

About us

We are a group of companies with 30+ active projects across travel, fintech, mobile apps, and AI products.
We build products through AI agents, and we’re looking for someone who knows how to work with them effectively.

Tech stack:

• Frontend: Next.js, React Native
• Backend / Infra: Vercel, Firebase, Cloudflare

What you’ll do

• Translate product and technical ideas into clear tasks for AI agents
• Guide AI agents to produce production-ready code
• Review, refine, and improve AI-generated code
• Choose the right models and tools for each task
• Push features all the way to production

In short: you manage an AI-powered dev team that writes code for you.

What we’re looking for

• 1+ year of web development experience
• 3+ months of hands-on work with AI coding tools
• Experience working with AI agents (not just autocomplete)
• Ability to read code and do code reviews
• Solid understanding of frontend, backend, and APIs
• Advanced English

Nice to have

• Built projects mostly or fully using AI
• Know how to optimize AI usage for cost and limits
• Actively follow new models and AI dev tools
• Experience with mobile development

What we offer

• 🏢 Office-based role in Warsaw
• 🤖 Unlimited access to top-tier AI models
• 🎯 Direct collaboration with the CTO — no bureaucracy

How to apply

Please include:

• Examples of projects you built using AI
• Your AI setup: tools you use and how you handle limits and costs
• If you’ve only worked with Cursor — what doesn’t work for you in it?

🚀 If you want to build fast, experiment, and shape how products are created with AI — we’d love to hear from you.

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:
The product is a security-aware platform built to help enterprises monitor, analyze, and optimize the digital experience across all employee devices and environments, whether on-prem, virtual, or cloud-based. It gives IT teams real-time visibility into system performance, application stability, and end-user experience, with the ability to automatically detect and remediate issues before they cause disruptions.

The product has seen strong traction globally, with significant year-over-year growth and increasing demand from large, distributed teams that need to secure and stabilize digital environments without adding complexity.

About the Role:
 

We’re hiring a Senior Full-Stack Engineer to join a growing engineering team working on an industry-leading Digital Employee Experience (DEX) platform. The team develops solutions for the monitoring and control of physical endpoints, leveraging a modern stack and cloud platforms.

You’ll be part of a high-skill group tackling challenging engineering problems: scaling distributed systems, designing micro frontend architectures, and building shared libraries that impact multiple product areas. This is a chance to work with cutting-edge technologies and AI-assisted development tools while shaping the future of endpoint monitoring and workplace automation.

Key Responsibilities:

• Contribute as a senior member of the full-stack engineering team
• Develop and enhance both frontend and backend components
• Collaborate on architectural decisions and implementation of modern design patterns
• Work with cloud services and scalable data technologies
• Improve productivity and code quality using AI-assisted development tools.

Required Competence and Skills:

• BS/MS in Computer Science or Engineering (or equivalent experience)
• 5+ years of professional experience in full-stack development (both frontend and backend) using JavaScript
• 3+ years with React (single-page apps, modern frontend paradigms)
• 2+ years of hands-on experience building microservice-based applications using Node.js
• Proficiency in ECMAScript, HTML5, SCSS, Babel, Webpack
• Strong knowledge of OOP and design patterns
• Familiarity with micro frontend architecture and module federation
• Experience with cloud platforms (Azure preferred, AWS or GCP acceptable)
• Proven experience in building shared/common packages
  Solid understanding of UX/UI design principles
• Experience with AI-assisted development tools (e.g. GitHub Copilot, Cursor, Claude Code, etc.)

Nice to have:

• Knowledge of .NET for working with agents on Windows/Linux/Mac
• Familiarity with CI/CD pipelines and DevOps practices.

Why Us?

We provide 20 days of vacation leave per calendar year (plus official national holidays of the country you are based in).

We provide full accounting and legal support in all countries in which 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.

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:

We power a proprietary, machine-learning-driven platform for programmatic user acquisition and retargeting in the mobile app space. The system processes tens of terabytes of raw data each day and generates millions of ad recommendations in real time. It handles millions of requests per second, delivering low-latency, high-throughput services that directly impact client growth and revenue.

Operating at this scale requires continuous innovation around distributed architecture, performance optimization, security and data protection. Our clients are major app developers seeking granular insights and measurable ROI, so robust engineering is critical to maintaining service quality and enabling rapid feature rollout under heavy load.

About the Role:

As Full Stack Team Lead, you will own the design, implementation and maintenance of our core real-time ad-serving infrastructure. You will rally a globally distributed team of four engineers behind a shared vision, drive technical direction and ensure high performance, availability and security. This role demands a hands-on leader who spends roughly half their time coding, reviewing designs and guiding end-to-end project delivery, and half their time on team management, sprint planning and stakeholder collaboration.

You will work closely with Executive, Product, Data and Design teams to define optimal solutions, integrate third-party APIs, and shape the roadmap for scalable growth. Your contributions will directly affect system reliability, client satisfaction and the company’s ability to scale into new markets.

Key Responsibilities:

• Design, implement and operate large-scale, highly available, real-time (low-latency) services using Node.js, TypeScript, React, Redis and Kubernetes on AWS.
• Lead and mentor a team of four distributed engineers; conduct code reviews, design reviews and knowledge-sharing sessions.
• Collaborate with executives, product managers, data scientists and designers to translate requirements into technical solutions.
• Design, develop and integrate RESTful APIs and third-party services.
• Plan, groom and manage agile sprint cycles; track progress and adjust priorities to meet delivery goals.
• Define and enforce security best practices and data protection policies across services.
• Oversee on-call rotation and incident response; maintain low alert rates and rapid recovery processes.
• Manage team operations including onboarding, offboarding, performance reviews and hiring support.

Required Competence and Skills:

• 6+ years of professional experience in backend (Node.js preferred) and frontend development (React, Vue or Angular).
• 2+ years in a people-management or team-lead role, with direct experience conducting one-on-ones and performance reviews.
• Proficiency with SQL and NoSQL databases in production environments.
• Experience deploying and operating services on a major cloud platform (AWS, Google Cloud or Azure).
• Deep understanding of the software development lifecycle and agile methodologies.
• Strong problem-solving skills, self-sufficiency and a proactive “can-do” attitude.
• Fluent English communication skills, both written and verbal.

Nice to Have:

• Experience coordinating with offshore development teams.
• Background in web-based SaaS platforms.
• Exposure to large-scale data processing or Big Data technologies.
• Hands-on familiarity with Kubernetes at production scale.

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.

We invite Senior Full-Stack Developer with expertise in Go and React to join our team for remote, long-term cooperation.

To help build and scale a next-generation B2C digital platform.

Requirements:

• 3+ years of comprehensive full-stack development experience
• 2+ years experience with Go(Golang) and React.js
• Strong and confident knowledge of TypeScript.
• Proficiency in both SQL and NoSQL database systems
• Upper-Intermediate level of English proficiency (reading, writing, and speaking)
• Remote team members are expected to travel to our EU office from time to time for on-site meetings.
• Proven ability to perform autonomously and collaborate within cross-functional teams
• Responsible approach to assigned tasks and deadlines

We offer:

• Flexible work model allowing remote, on-site, or hybrid options.
• Optional relocation to our EU office, with complete legal support throughout the process.
• Paid vacation and sick leave
• Comprehensive health insurance and sports membership reimbursement
• Reimbursement of necessary transportation expenses
• Friendly and collaborative atmosphere, dedicated mentorship, various performance-based bonuses and company benefits
• Multinational team of expert software engineers
• Free participation in educational programs and professional courses

• English lessons with native-speaking instructors.

   

Further information will be shared at the interview stage.

Kindly add your Telegram username to your CV.

The company shapes the future of autonomous AI agents for developers. Work with AI engineers to build tools that enhance coding workflows, automate tasks, and boost productivity.

Why join us?

Be a part of the next AI-powered development tools redefining software engineering. Collaborate with top-tier engineers and AI specialists. Solve complex challenges in a fast-paced, growing company. Enjoy a fun work environment and exciting opportunities as we rapidly expand. Gain exposure to cutting-edge tech while we expand weekly.

• Be a part of the next AI-powered development tools redefining software engineering.
• Collaborate with top-tier engineers and AI specialists.
• Solve complex challenges in a fast-paced, growing company.
• Enjoy a fun work environment and exciting opportunities as we rapidly expand.
• Gain exposure to cutting-edge tech while we expand weekly.

Responsibilities:

You’ll play a key role in designing and developing software, balancing backend and frontend development. Responsibilities include architecting scalable backend services, optimizing cloud-based solutions, and building interactive UI components and IDE plugins. Solve challenges like parsing large codebases, integrating AI assistants, and optimizing performance.

Requirements:

• 8+ years of full-stack engineering experience, with Strong backend and Strong frontend skills.
• Tech lead with at least 1 year of experience. 
• Experience with Redis and PostgreSQL
• Deep expertise in React, TypeScript, and modern Frontend and Backend architectures.
• Deep Experience with NodeJS
• Experience with AWS 
• Experience with AI-powered dev tools in day-to-day workflow.
• Experience working with CI/CD pipelines, automated testing, and modern development workflows.
• Experience with Infrastructure as Code (IAC) tools such as Terraform or Pulumi.
• Experience  in building interactive UI components and IDE plugins
• B2+ English Level 

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: 
The product is a security-aware platform built to help enterprises monitor, analyze, and optimize the digital experience across all employee devices and environments, whether on-prem, virtual, or cloud-based. It gives IT teams real-time visibility into system performance, application stability, and end-user experience, with the ability to automatically detect and remediate issues before they cause disruptions.
 

The product has seen strong traction globally, with significant year-over-year growth and increasing demand from large, distributed teams that need to secure and stabilize digital environments without adding complexity.

About the Role: 
We’re hiring a Senior Full-Stack Engineer to join a growing engineering team working on an industry-leading Digital Employee Experience (DEX) platform. The team develops solutions for the monitoring and control of physical endpoints, leveraging a modern stack and cloud platforms.

You’ll be part of a high-skill group tackling challenging engineering problems: scaling distributed systems, designing micro frontend architectures, and building shared libraries that impact multiple product areas. This is a chance to work with cutting-edge technologies and AI-assisted development tools while shaping the future of endpoint monitoring and workplace automation.

Key Responsibilities: 

• Contribute as a senior member of the full-stack engineering team
• Develop and enhance both frontend and backend components
• Collaborate on architectural decisions and implementation of modern design patterns
• Work with cloud services and scalable data technologies
• Improve productivity and code quality using AI-assisted development tools.

Required Competence and Skills:

• BS/MS in Computer Science or Engineering (or equivalent experience)
• 5+ years of professional experience in full-stack development (both frontend and backend) using JavaScript
• 3+ years with React (single-page apps, modern frontend paradigms)
• 2+ years of hands-on experience building microservice-based applications using Node.js
• Proficiency in ECMAScript, HTML5, SCSS, Babel, Webpack
• Strong knowledge of OOP and design patterns
• Familiarity with micro frontend architecture and module federation
• Experience with cloud platforms (Azure preferred, AWS or GCP acceptable)
• Proven experience in building shared/common packages
  Solid understanding of UX/UI design principles
• Experience with AI-assisted development tools (e.g. GitHub Copilot, Cursor, Claude Code, etc.)

Nice to have:

• Knowledge of .NET for working with agents on Windows/Linux/Mac
• Familiarity with CI/CD pipelines and DevOps practices.

Why Us?

We provide 20 days of vacation leave per calendar year (plus official national holidays of the country you are based in).

We provide full accounting and legal support in all countries in which 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.

N-iX is a global software development company founded in 2002, connecting over 2,400+ tech professionals across 40+ countries. We deliver innovative technology solutions in cloud computing, data analytics, AI, embedded software,IoT, and more to global industry leaders and Fortune 500 companies. Join us to create technology that drives real change for businesses and people across the world.

Our client is a technology company specializing in Learning Management Systems (LMS), delivering scalable, cloud-based digital learning solutions for enterprise customers. Their platform supports training, compliance, and continuous learning initiatives across distributed organizations.

We are looking for a Senior Full Stack Engineer with strong expertise in .NET and modern front-end technologies to join the team and contribute to the evolution of this cloud-native platform.

Responsibilities:

• Design and develop scalable backend services using C# / .NET
• Build and maintain a message-based microservices architecture
• Develop and enhance React-based front-end applications
• Implement real-time functionality using SignalR
• Manage application state using Redux and RTK Query
• Contribute to cloud-native solutions deployed in Microsoft Azure
• Leverage generative and agentic AI tools (e.g., GitHub Copilot) to improve engineering efficiency
• Collaborate with cross-functional teams to deliver high-quality, scalable software

Requirements:

• 5+ years of experience with C# and modern .NET
• Proven experience working with message-based microservices architecture
• Solid hands-on experience with Microsoft Azure
• Strong production experience with React
• Practical experience with Redux and RTK Query
• Experience with SignalR
• Hands-on experience using generative AI tools for software development (e.g., GitHub Copilot)
• Strong understanding of clean architecture and distributed systems

JavaScript Full-Stack Engineer (Apps Factory)

We are building Apps Factory — a product team that launches and scales mobile subscription apps across multiple verticals such as utilities, health, education, AI tools, and more.

Experience with subscription-based mobile apps is highly important for this role.

We are looking for a JavaScript Full-Stack Engineer to help us build an internal platform that automates creative production, ad campaign execution, landing builders, content management systems, and growth operations.

You will work with Vue, Node.js, and GCP/Firebase to develop internal tools and automation systems used by product, marketing, and growth teams.

Responsibilities

• Build and maintain full-stack applications using JavaScript, Vue/React, and Node.js
• Develop APIs, microservices, and serverless functions on GCP / Firebase
• Build Web-to-App / Web-to-Web landing builders and CMS for mobile and web products
• Implement automation for creative workflows and programmatic campaign operations
• Maintain high code quality, reliability, observability, and CI/CD standards
• Collaborate closely with Data, ML, Product, UA, and Creative teams

Requirements

• Strong proficiency in JavaScript
• Experience with Node.js
• Experience with Vue or React
• Experience with GCP / Firebase (Cloud Functions, Firestore, Cloud Run)
• Experience with SQL / NoSQL databases (Firestore, MongoDB)
• Experience with analytical databases (BigQuery or ClickHouse)
• Deep understanding of APIs, microservices, and event-driven architectures
• Strong ownership mindset and ability to work cross-functionally

Nice to have

• Experience with React Native (mobile development)
• Experience with payment services (Stripe / PayPal)
• Experience working with ad platform APIs (Meta / Google)
• Experience with marketing or payment analytics
• Experience with AppsFlyer, Adapty, or RevenueCat

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

Design and develop full-stack applications using Java + React.
- Build REST APIs following microservice standards.
- Implement user interfaces using Nexus design system.
- Refactor legacy components for modernization and performance. - Collaborate with architects to define scalable solutions.

- Participate in code reviews, testing, and sprint ceremonies.
- Optimize application reliability, performance, and maintainability. 

Skills
- Strong in Java, Spring Boot, REST API development. (4+ years of commercial experience)
- Expertise in React, JavaScript/TypeScript, UI state management.
- Experience with Nexus design system or similar component systems. - Understanding of cloud-native development and containerization.
- Knowledge of CI/CD, Git workflows, automated testing.
- Familiarity with security best practices for APIs.
- Good understanding of system integration patterns.

About the Project

Our client is a B2B cloud computing company that empowers software organizations to deliver immersive, hands-on experiences for sales demos, POCs, and customer training. Trusted by leading global brands such as Palo Alto Networks, Atlassian, Check Point, Dell, and many more, our platform accelerates sales cycles, boosts engagement, and improves user adoption. With a dynamic team across Israel, the U.S., and Europe, and backed by Bow River Capital, we’re growing fast! Join us to shape the future of virtual experiences.

We seek an Experienced Full-Stack Developer to take a pivotal role in our R&D organization. This position is for a technical leader passionate about building great software and can drive development across the entire lifecycle, from concept to production.

Required skills:

• Bachelor’s degree in Computer Science, Engineering, or equivalent experience as a Software Engineer in an IDF technological unit.
• 5+ years of professional, hands-on experience in software development.
• Proven experience leading the development of complex features from a technical standpoint, from design to deployment.
• Strong experience in backend development with C# and the .NET (or .NET Core) framework.
• Deep expertise with modern frontend frameworks, preferably Angular and TypeScript.
• Hands-on experience with cloud platforms (AWS preferred), CI/CD tools (e.g., GitHub Actions, Jenkins), and containerization (Docker).
• Experience with IaC tools such as Terraform or CloudFormation.
• A proactive and autonomous individual who can own complex problems and drive them to resolution.

Nice-to-Haves:

• Experience with state management libraries (e.g., NgRx).
• Familiarity with component libraries such as Angular Material.
• Advanced knowledge of testing frameworks and tools (e.g., Jasmine, Karma, Playwright, NUnit, xUnit).

Scope of work:

• Lead end-to-end feature development using Angular and C#, collaborating with product teams and mentoring engineers.
• Take full ownership of our infrastructure evolution by driving modernization initiatives such as monolith upgrades, service containerization, and migration to the AWS cloud.
• Actively build, manage, and improve CI/CD pipelines, automation, and cloud infrastructure to ensure smooth and reliable deployments.
• Design and deliver scalable backend services and responsive user interfaces.
• Promote best practices in code quality, testing, and security.
• Translate product requirements into production-ready features.
• Work with relational databases and optimize queries.

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

- Modernize legacy systems via redesign and refactoring.
- Develop UI using React + Nexus design system.
- Build APIs with proper security and lifecycle governance. 

- Design reusable component libraries and UI frameworks. 

- Collaborate with UX, product, and architecture teams. 

- Optimize frontend and backend performance.

- Support public API documentation and governance.

Skills

- Strong Java, C# + Spring Boot backend capability.
- Expertise in React, TypeScript, Nexus UI components.
- Experience with modernization and migration projects.
- Understanding of microservice and API design.
- Familiarity with CI/CD, linting, testing frameworks.
- Knowledge of frontend security and performance patterns. - Good collaboration across UX and backend teams.

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

What does this mean?

Before making an offer, they will check whether you have violated any EU laws.

Why Poland?

The client has teams in the USA, Ireland, and Poland.

For background check — you must be a taxpayer in Poland for 2+ years.