Jobs

We are Performa, an HR agency, and we're excited to find a top-notch professional for one of our clients. We're currently seeking an experienced JavaScript Developer (Pixi.js).

Aceroll.io is an independent game studio and technology provider focused on building high-quality online slot games and iGaming infrastructure. We combine deep mathematical expertise, modern development frameworks, and a cross-functional team of product managers, engineers, designers, and legal experts to deliver scalable, certified gaming solutions tailored to global markets.

Our platform supports full flexibility in game configuration, regulation, and integration - from custom slot mechanics to certified RGS/API distribution for operators and aggregators.

Role:
As a JavaScript Developer (Pixi.js), you'll lead slot game development, collaborate with artists and animators, and craft code-based video effects. Your expertise will bridge the gap between technical excellence and artistic vision, creating unforgettable gaming experiences.

Responsibilities:
● Develop engaging slot games and be proficient in using animations (Spine), effects, game development design patterns, and JavaScript/TypeScript.
● Collaborate with animators and artists to ensure seamless visual storytelling.
● Optimize game performance for a flawless player experience.
● Mentor junior developers and contribute to our culture of continuous learning.

Requirements:
● 3+ years in game development, with a focus on slots and visual effects.
● Expert knowledge of JavaScript/TypeScript, HTML5, CSS3, and Pixi.js.
● Proven track record of collaborating with creative teams.
● Portfolio showcasing slot games and in-depth knowledge of slot game development.

We Offer:
● Remote work or working from our offices in Lisbon, London, or Warsaw.
● 20 paid vacation days annually.
● Flexible compensation models (contract, invoice, or payroll-based).
● A lean and transparent development process with minimal bureaucracy.

About Sembly AI:
We are Sembly AI — a cutting-edge AI SaaS startup revolutionizing how businesses leverage AI to achieve results with our industry-leading AI Teammate product. Our innovative platform is transforming the way teams collaborate and optimize productivity.
 

About the Role

We’re looking for a motivated and detail-oriented Junior/Mid-Level Front-End Developer with strong skills in PHP, JavaScript, and React. You will play a key role in keeping our web presence and product running smoothly, while also building and improving user-facing features in our web application.

Responsibilities

• Update and maintain our company website
• Maintain and monitor integrations with external systems
• Develop front-end features for our web application using React and JavaScript
• Work with PHP for backend integration and data handling
• Respond to customer-reported issues, investigate root causes, and implement fixes
• Collaborate with designers to translate UI/UX wireframes into responsive web pages
• Optimize applications for speed, scalability, and cross-browser compatibility
• Debug and troubleshoot issues in development and production
• Participate in code reviews, feature planning, and process improvements
   

Requirements

• 1–3 years of professional experience in front-end web development
• Strong proficiency in JavaScript and React
• Experience with PHP for backend development or integration
• Solid understanding of HTML5, CSS3, and responsive design principles
• Familiarity with RESTful APIs and JSON
• Basic knowledge of Git for version control
• Strong problem-solving skills and attention to detail
• Good communication and teamwork skills
   

Nice to Have

• Experience with state management libraries (e.g., Redux, Zustand)
• Familiarity with CSS frameworks (e.g., Tailwind CSS, Bootstrap)
• Understanding of build tools (Webpack, Vite, etc.)
• Exposure to testing frameworks (Jest, Cypress)

What We Offer

• Competitive salary
• Flexible working arrangements
• Opportunities for professional growth and skill development
• Collaborative and supportive work environment

NuxGame works with iGaming operators of all scales helping companies access new markets or enhance their existing brands. As a casino gaming software company, NuxGame provides solutions that allow building outstanding brands and fulfilling your business goals.We are looking for a Front-end developer (Vue 2\3) to join our team.

What will be your responsibilities:
 

• Development and support of web applications;
• Research and implementation of new technologies and tools in development;
• Optimizing and adding new features to existing web applications;
• Front-end performance optimization (lazy loading, code splitting, Lighthouse improvements, webpack/vite tuning, etc.);

• Work in a team with other developers, testers, and designers to achieve project goals.

   

What we expect from you:
 

• 3+ years of commercial front-end development experience, with at least 2 years in Vue.js 3
• Deep understanding of TypeScript and its features in the context of Vue 3 (Composition API, Pinia)
• Knowledge of HTML, CSS , and style preprocessors (SASS/LESS);
• Experience with REST API and ability to integrate it with front-end;
• Knowledge of SPA development principles and component approach;
• Understanding of web application architecture and web development principles;

• Ability to work in a team and high level of communication skills.

   

It'll be a plus:
 

• Experience with other front-end frameworks;
• Experience with unit/e2e testing (Jest, Cypress, Playwright);
• Experience with back-end development and databases (Laravel + InertiaJs).

We are the industry-leading Capital Markets technology and execution provider. We are looking for Senior\Lead JS Front End Developer to work on strategies and algorithms used by our Smart Order Router application to route orders to all US equities and options exchanges.We are looking for someone who takes developing more than just a job

We are offering  

• Full-time remote work or the office space in Vinnytsia
• Flexible working hours
• All necessary equipment (laptop, chair, monitors. etc.) 
• Accounting support

Required skills for Senior\Lead JS Front End Developer 

• Typescript
• Angular 17
• Angular Material
• ngrx
• Sass
• D3
• Nx
• Jest
• Websockets/SignalR

Desired skills

• Node.js
• Experience with algorithmic trading 
• Familiarity with US Equity and Option markets 

The project Description

DASH360

A web-based analytics, visualization, and workflow application with real-time transparency into every stage of an order’s life cycle. The DASH360 portal includes comprehensive analytics and reporting around performance and costs, provides actionable intelligence and detailed insight into the electronic execution process, and contains various workflow solutions to streamline middle office, reporting and risk procedures.

 

Your responsibilities:

• Translate product requirements into scalable frontend features.
• Lead the design and development of new components.
• Review and improve architecture and performance.
• Collaborate closely with backend and product teams.

• Ensure high test coverage and code quality (unit, integration, e2e).

   

We’re looking for someone with:

• 5+ years of experience in frontend development.
• Deep expertise in Vue.js (Vue 2/3), Nuxt, JavaScript (ES6+).
• Solid understanding of state management, SSR, and frontend architecture.
• Experience writing and maintaining test suites.
• Ability to mentor others and work independently.
   

What the company offers:

• A work environment with a minimum level of hierarchy.
• Family-like culture.
• A flexible working schedule.
• 20 days of paid vacation + 100% paid sick leaves (up to 5 days).
• A friendly Scrum team, with a lot of challenges and opportunities each day.
• A great opportunity for self-development and a variety of challenging tasks.
• A healthy work-life balance.

We’re seeking a Frontend Developer skilled in Laravel Blade integrations to deliver clean, accessible, and maintainable UIs. You’ll work closely with backend teams and designers to create responsive, user-friendly solutions.

What You’ll Do

• Build UIs using Laravel Blade with Livewire and AlpineJS
• Integrate CMS platforms such as Filament or Strapi
• Maintain semantic, standards-compliant HTML/CSS using BEM and Atomic Design
• Use Vite with NPM for asset building and optimization
• Implement designs from Figma and other wireframing tools

Requirements

• Livewire/AlpineJS experience (Laravel blade integrations of these)
• Experience with CMS integrations (i.e Filament, Strapi)
• Experience using Figma and other wireframe design tools
• Ability to use common frontend methodologies like BEM (block element modifier) and the Atomic Design structure
• Confidence using Vite in conjunction with NPM to build assets
• Ability to produce quality markup that is easy to read and structured well, using semantic elements which also adheres to the W3C standard
• UI/UX design competency

Nice to Have

• Use client/server side front end frameworks like React/Vue
• Experience with animations and custom front end elements/components

Description

Candidate will be responsible for the backend and client apps testing of media applications on the Android and iOS mobile platforms.
This is an opportunity to join a worldwide community of developers that create and deliver fast and innovative media and networked applications for mobile platforms

Requirements

– Good knowledge and experience in JavaScript 

– Knowledge of manual testing, preferably with practical experience

– Knowledge of concepts and theory of software testing and development life cycle

– Upper-Intermediate English level

– Knowledge of Operating Systems and network protocols

– Attention to detail, patience, and investigation skills

– Fast learner with strong problem-solving skills

Job responsibilities

– Developing automation tests

– Reporting and executing some of the tests manually

– Debugging issues and creating bug reports

Description

As part of the ongoing effort to modernize the embedded software in advanced scientific equipment, this sub-project focuses on improving the software and firmware update process for factory-configured devices.
Currently, updates are applied manually in a sequential manner, which limits scalability and increases operational effort. This initiative aims to design and implement a (semi-)automated update mechanism capable of performing parallel deployments across multiple units, significantly reducing installation time and improving consistency.
Key goals include minimizing manual intervention, ensuring reliable version control and compatibility checks, and enabling efficient, scalable rollouts within production environments. The resulting system will enhance maintainability and operational efficiency for high-value devices in complex manufacturing workflows.
 

Requirements

•  3+ years of professional experience using JavaScript/React
•  Intermediate strong or higher English level
• Ability to work in agile software development environment, maintaining focus yet remaining flexible to requirements and design change
• Proactive problem solving abilities
• Quick learner and self contributing person
• Strong communication skills
   

Job responsibilities

• Implement new solutions into the current system with the refactoring and from scratch methods;
• Preparing the technical documentation;
• Participating in client meetings to understand business and user requirements and estimate tasks;
• Collaborating closely with other engineers, product owners and testers to identify and solve challenging problems;
• Taking part in defect investigation, bug fixing, troubleshooting;

Requirements:

• At least 5 years experience in HTML5 desktop / mobile game development;
• Experience in JavaScript ES6+ / PIXI.js / HTML / TypeScript/ CSS;
• Knowledge of Git;
• Experience in cross-browser development;
• Understanding the Model-View-Controller (MVC) Architecture;

Responsibilities:

• Creating browser-based HTML5 slot games for desktop and mobile devices;
• Performance optimization for various devices;

Will be a plus:

• Ability to work with gulp;
• Experience with Spine animations;
• Experience with Texturepacker;
• Understanding of performance optimization algorithms, memory management, threading;
• Experience in gambling industry;

We offer:

— Work remotely or from our Bratislava office (relocation support provided).

— Competitive salary fixed in EURO with regular performance reviews;
— Friendly and inspiring environment in a team of professionals;
— Freedom to express yourself and opportunity of personal professional growth;
— Interesting projects with invaluable professional experience;

— Flexibility in your schedule;
— Additional company days off;
— Unlimited vacation if you need recovery and inspiration;

— Maternity Leave;
— Wedding and newborn baby gifts.

We are an ambitious, product-driven team looking for a Senior Frontend React Engineer to play a key role in shaping our frontend architecture, mentoring teammates, and pushing the boundaries of what’s possible in web applications. You’ll be a cornerstone of our engineering culture, ensuring world-class user experiences across platforms.

Key Responsibilities

• Drive Frontend Architecture: Define, evolve, and maintain a scalable frontend architecture that balances performance, maintainability, and developer experience.
• Mentorship & Leadership: Act as a technical leader, mentoring mid- and junior-level developers, conducting reviews, and setting high engineering standards.
• Design & Build Advanced UI Components: Translate complex product requirements and designs into elegant, reusable, and performant components.
• Cross-Functional Collaboration: Partner closely with backend engineers, designers, and product managers to align technical direction with business goals.
• Code Quality & Best Practices: Champion clean code, testing strategies, CI/CD pipelines, and modern development workflows.
• Innovation & Research: Evaluate new technologies, tools, and methodologies; bring forward ideas to elevate the product and team efficiency.
• Performance & Accessibility: Ensure applications are highly performant, accessible, and follow best practices for inclusive design.

Qualifications

• Experience: 6+ years in professional frontend development, including 3+ years with React and TypeScript at scale. Proven track record of delivering complex projects end-to-end.
• Technical Expertise:
  • Deep knowledge of React.js, TypeScript, and modern frontend ecosystems.
  • Mastery of HTML5, CSS3, responsive design, and CSS-in-JS solutions.
  • Strong knowledge of performance optimization techniques and profiling.
  • UI/UX Sensibility: Strong ability to bridge design and engineering, with a keen eye for detail and user experience.
• Bonus Skills:
  • Expertise in advanced animations.
  • Experience with design systems and UI frameworks (Tailwind, MUI).
  • Experience in mobile or cross-platform development (React Native, Capacitor).
  • Exposure to backend-for-frontend (BFF) patterns.

What We Offer

• Competitive Senior-Level Salary
• Remote Work with flexible schedule
• Challenging Projects with real-world impact and scale
• Supportive, Talented Team that values knowledge sharing and collaboration
• Continuous Growth Opportunities: freedom to experiment with new tech, contribute to architecture, and lead initiatives

Description

The customer is a large hardware corporation based in Germany. You will play a crucial role in expanding the new Digital Innovations unit and your main focus will be on development of a company-wide Identity solution.

In this challenging function you will be part of a small agile team with other senior devs. The way of working is very casual and trust-based and the team aims for regular direct collaboration with project stakeholders such as experts from various departments, such as IT Experts, Product Owners or Engineers who will be consuming your solution.

Requirements

Technical criteria:

Senior Frontend Developer with > 8 years hands-on experience in Angular (8 years is the minimum)
hands-on experience with AngularJS (old Angular)
hands-on experience in reactive programming
Experience in working with ngrx
Fluent in Javascript and Typescript
CSS in modern browsers, build tooling, git, pipelines
Responsive Design strategies
Experience in optimizing web applications (code splitting, lazy loading, caching strategies)

 Softskill criteria:

Reverse engineering skills, problem-solving skills
Hands-on mentality with focus on delivery
communication skills, open to share knowledge with others
team player with agile mindset
Fluent English speaking skills

Nice to Have:

Experience with requireJs
Experience in NX Build System

Job responsibilities

In this function, you will work in a supportive, team-focused environment that enables the co-ideation and development of customer-centric digital products.

Scrum team with Frontend, Backend, QA, PO & UI/UX designer

You and your team will develop services to be used globally across all customer units.

Your responsibilities:

• Translate product requirements into scalable frontend features.
• Lead the design and development of new components.
• Review and improve architecture and performance.
• Collaborate closely with backend and product teams.

• Ensure high test coverage and code quality (unit, integration, e2e).

   

We’re looking for someone with:

• 5+ years of experience in frontend development.
• Deep expertise in Vue.js (Vue 2/3), Nuxt, JavaScript (ES6+).
• Solid understanding of state management, SSR, and frontend architecture.
• Experience writing and maintaining test suites.
• Ability to mentor others and work independently.
   

What the company offers:

• A work environment with a minimum level of hierarchy.
• Family-like culture.
• A flexible working schedule.
• 20 days of paid vacation + 100% paid sick leaves (up to 5 days).
• A friendly Scrum team, with a lot of challenges and opportunities each day.
• A great opportunity for self-development and a variety of challenging tasks.
• A healthy work-life balance.

We are looking for a Full Stack Frontend Developer / UI-UX Designer ready to work on AI-driven web solutions where AI is the main tool in the development process. You will be responsible for the visual layer of our products, working at the intersection of design, UX, and AI technologies.

What you’ll do:

• Use AI tools to accelerate UI/UX workflows and content generation: from creating basic functionality to deployment.
• Refine, optimize, and polish AI-generated designs, graphics, and texts to ensure a modern and seamless look & feel.
• Develop the frontend of web applications (React, TypeScript).
• Create intuitive, modern, and responsive interfaces.
• Collaborate with backend services via APIs.
• Conduct interface testing to improve user experience.

What we’re looking for:

• 5+ years of experience in frontend development.
• Proven experience using AI tools (vibe coding) to accelerate coding, debugging, and refactoring.
• Strong knowledge of React and TypeScript.
• Experience in UI/UX design (Figma or similar tools).
• Ability to deliver high-quality work with fast production release cycles.
• Skill in adapting AI-generated outputs to real product needs.
• Strong sense of style and understanding of responsive design principles.
• Basic backend knowledge for effective collaboration with the team.
• Experience with generative AI in design (Midjourney, Stable Diffusion, or similar) is a plus.

What we offer:

• Competitive salary and performance-based bonuses.
• Opportunity to work on cutting-edge AI + blockchain projects.
• Flexible working hours and remote work options.
• Professional development, training, and access to AI & blockchain research resources.
• Dynamic and international environment with a focus on technology, compliance, and growth.
• Strong, experienced team with expertise in finance, blockchain, and AI.

✨ If you want to design the future side by side with AI — we’d love to talk.

We are currently seeking a Senior Frontend Developer with expertise in React.js and React Native to join our team. This is an exceptional opportunity for a highly skilled individual to contribute to our growing and innovative technology company. The Senior Frontend Developer will play a pivotal role in designing, developing, and maintaining advanced user interfaces for web and mobile applications.

Responsibilities:

• Build user-friendly interfaces for web and mobile applications using React and React Native.
• Collaborate closely with backend engineers and product designers to implement user-facing features and ensure seamless integration with server-side logic.
• Identify and address performance bottlenecks and bugs, and propose effective solutions.
• Uphold code quality, organization, and automation best practices.
• Enhance existing features and create new ones, contributing to our portfolio of applications.
• Work collaboratively with product managers, designers, and other engineers to define product roadmaps and milestones.
• Lead code reviews and provide mentorship to junior developers.

Requirements:

• Proven experience in building user interfaces with React and React Native.
• Strong problem-solving skills and the ability to work both independently and as part of a collaborative team.
• Proficiency in TypeScript and a solid understanding of modern frontend development practices.
• Familiarity with state management solutions like Redux or React Query.
• Knowledge of RESTful API integration.
• Strong understanding of responsive web design and mobile-first principles.
• Proficient in HTML and CSS, with an eye for detail in UI/UX design.
• Proficient with version control systems, such as Git.
• Familiarity with CI/CD pipelines and deployment processes.

Preferred Qualifications:

• Bachelor's or Master's degree in Computer Science, or a related field, or the ability to demonstrate expertise in modern development philosophy, and JavaScript system architecture.
• Experience building/supporting backend technologies
• Knowledge of testing frameworks and the ability to implement unit and integration tests.
• Familiarity with design systems and component libraries.
• Experience with continuous integration and deployment pipelines.
• Prior experience working in an Agile/Scrum development environment.
• Previous experience in a software development studio or a similar environment.
• Leadership or mentoring experience is a plus.

Compensation and benefits:

• Competitive salary
• Home office stipend
• Remote work
• Interesting products to work on
• Exposure to a variety of industries and technologies

Hiring process

• Resume and portfolio review
• 30-45 minute initial interview
• Short exercise
• 60 minute exercise review (panel)
• Leadership interview(s)
• Decision

We are looking for a JavaScript developer to join our team.

Responsibilities:

• Writing logic for new features on the client-side of the application
• Developing tools for the project

 Requirements:

• Experience with JavaScript and Typescript 4+ years
• SOLID, IoC, OOP, Software Design Patterns, client/server architecture
• High comfort level extending and improving an established codebase
• Experience unit testing or functional testing, instrumentation, and test harnesses
• Experience in version-control system Git|SVN
• English Intermediate
• Being familiar with SCRUM Agile development framework

 Nice to have:

• Experience with Cordova or PhoneGap or Ionic
• Experience with C++ or Java or Objective C
• Gamedev/slot dev experience
• Experience with graphic engines on JS TS
• Experience in performance analysis and code optimization
• Experience in cross-platform programming
• Experience with Babel, Rollup|Webpack, NPM, Node.js

Benefits:

• Annual company bonus
• Competitive salary & flexible working hours
• Daily breakfast, lunch, and office refreshments
• Private health insurance, dental coverage, and psychological counseling
• 20 paid vacation days and 5 sick days per year
• 6 long weekends and 1 day off for your birthday
• Gifts for special occasions (birthday, Easter, Christmas, Women’s and Men’s Day, weddings, childbirth, etc.)
• Technical library with the option to order books
• Access to our educational platform with courses, training programs, and certifications
• Career development through coaching and reviews
• Internal mobility & referral program
• Corporate celebrations, team-building events, and fun activities
• Personal care in the office (nails, eyebrows, and barber services)
• Modern offices (Kyiv, Vinnytsia, Dnipro) with organized shuttle buses to and from the office