Jobs

About Project: Multi-tenant exhibition platform that powers AI-guided, gamified visitor experiences for live venues.

Experience:
• Strong production experience on AWS (Lambda, ECS, Aurora or RDS, and the surrounding services)
• Deep PostgreSQL: schema design, query performance, and hands-on experience with row-level security or another rigorous approach to multi-tenant data isolation
• TypeScript fluency on the server side
• Experience designing event-driven or streaming systems (SQS, Kinesis, WebSocket, or equivalent)
• A track record of operating production services: metrics, tracing, alerting, on-call response

Nice to Have:
• LLM integration in production: prompt engineering, streaming inference, latency and cost optimization
• Real-time audio or TTS pipelines
• B2B multi-tenant authentication (Stytch, Auth0, Cognito, or similar)
• Reading Rust (one Rust service in production)
• Headless CMS integrations
• Beacon, BLE, or other sensor-data ingestion pipelines
• Background in cultural, museum, live-event, or exhibition technology

Tech: AWS end-to-end. Lambda and ECS Fargate for compute, Aurora PostgreSQL with pgvector and row-level security for data, ElastiCache Redis, S3 + CloudFront, SQS for fan-out, API Gateway in front. TypeScript on the services, Rust on the streaming layer. Stytch for authentication. PostHog and Mixpanel for analytics. Terraform per service, GitHub Actions for CI/CD.

English level: Upper intermediate (Must be able to speak fluently!)

We are looking for a Senior Data Engineer. This is not a standard ETL role. You will work on a high-load system processing 10,000+ executions per minute, building scalable pipelines where AI and LLM logic are embedded directly into production data flows.

The role combines data engineering, backend thinking, infrastructure ownership, and real production AI integration.

What you will do:

• Design and maintain scalable data pipelines in Python on Google Cloud Platform
• Build and optimize AI-driven scoring flows using LLMs for real-time identity enrichment
• Work with BigQuery, Apache Spark, and Apache Iceberg for heavy data processing
• Maintain high-load orchestration with custom Python nodes and complex workflows
• Own deployment and release processes (CI/CD)
• Optimize PostgreSQL performance under heavy load
• Investigate incidents and resolve root causes permanently

• Use AI engineering tools such as Claude in daily development

   

Requirements:

• 4+ years of experience in Data Engineering / Backend Engineering
• Strong Python skills
• Commercial experience with production LLM integration (OpenAI / Anthropic / Gemini)
• Strong knowledge of GCP (Cloud Functions, IAM, Networking)
• Experience with BigQuery, Spark, Iceberg
• Good understanding of Kubernetes
• Experience with workflow orchestration tools (n8n is a strong plus)
• Strong practical knowledge of PostgreSQL

• English level B2+

   

What is important for us:

• Ownership mindset
• Fast learning ability
• Strong problem-solving approach
• Active AI usage in engineering work
• Focus on practical results over unnecessary complexity

Mobilunity is a Ukrainian-based and operated provider of software engineering teams. Our typical clients are European, American and Japanese startups and small-to-mid sized companies working with our teams as permanent and equal extensions to their own software departments. With our collaboration model, engineers get direct access to the client’s technical management and work hand-in-hand with their peers both on the client’s side and in Ukraine. We as the Vendor ensure all non-tech questions are solved in a supportive manner. Joining Mobilunity you will get the best from both worlds - strong support and a big community locally, and an ambitious international team.

We are extending our in-house Online Marketing Team and looking for a talented Senior SEO Specialist to join our team.

Main responsibilities:

• Conduct SEO optimization of the company's main website;
• Develop and implement long-term and short-term SEO experiments for the website;
• Collaborate with and coordinate content writers to update and improve content on the website;
• Conduct thorough competitor analysis and search for link opportunities, organize those utilization through link building team;
• Collect data and report on traffic, rankings and other SEO aspects;
• Optimize visibility for AI-generated answers and LLM-based search engines.

Main requirements:

• Have at least 4 years of experience on a similar SEO position (preferably in IT service companies);
• Have a proven record of past SEO campaigns, be ready to tell about such cases;
• Have at least Upper-Intermediate level of English;
• Have in-depth understanding of SEO principles and approaches;
• Be hands-on in various types of linkbuilding including outreach, crowd marketing, broken linkbuilding and more;
• Have experience in working with Google Analytics, Search Console, Ahrefs, SEMRush, ScreamingFrog;
• Be a master of Google Excel formulas;
• Be able to think creatively and have huge desire to experiment;
• Have analytical skills to forecast and identify trends and challenges;
• Be proactive, independent, attentive to details and extremely responsible.

Joining the team you will get:

• The friendliest community of like-minded IT-people;
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies;
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note;
• Fair salary and 100% taxes coverage – don’t worry about possible taxes raise – we will get you covered;
• The ability to work remotely or from the office in Kyiv (there is a generator and starlink for uninterrupted work);
• Comfortable working conditions in the office – no open spaces, separate rooms for the comfort of each team and several rest;
• Corporate events, numerous interest groups.

COME ON BOARD, AND LET’S GROW TOGETHER!

Requirements: 


-5+ years of experience in JavaScript game development
- Strong knowledge of HTML5, Canvas API, and DOM manipulation
-Proven track record in creating HTML5 games
-Advanced proficiency in JavaScript (ES6+), including async/await, modules, closures, and classes
-Experience with popular libraries/frameworks such as Phaser, Pixi and Three.js
-Solid understanding of object-oriented programming and expertise in performance optimization algorithms, memory management, and threading
-Experience integrating and optimizing Spine animations in game engines
-Experience with slots
-experience in leading and mentoring front-end development teams.
-strategic, structured and analytical thinking.
-strong collaboration and communication skills.


Responsibilities:

-Manage front-end developers team, and perform code reviews;
-Write clean, efficient, testable, and scalable code;
-Collaborate closely with the team to identify and prioritize areas for enhancement;
-Take part in the full development cycle and ensure smooth development and cooperation between the dev team and product owners
- Hands-on experience with AI tools as part of everyday work is a must


Nice to Have:

+ Experience optimizing HTML5 games for mobile browser performance
+ Understanding of CI/CD


Work conditions:

— Flexible working hours and the freedom to work remotely;
— Paid vacation of 20 workdays/year and 5 workdays/year for sick leaves;
— Unlimited unpaid day-offs to take care of personal matters;
— A range of paid benefits to choose from;
— Personal development plan to support your growth
— Skills training to sharpen your expertise;
— Education office featuring internal and external experts and mentorship programs;
— Structured processes through our corporate confluence;
— Open-minded management style with transparent communication of company strategy and plans;
— Performance-based reviews to recognize and reward your contributions;
— Stress management initiatives, including 1-1 meetings and a feedback culture;
— Engaging in corporate team-building events, marathons, and online challenges;
— Family-friendly policies, including special congratulatory gifts for personal milestones like the birth of a child or a wedding.

If you are an ambitious and enthusiastic professional, always eager to learn and achieve the best results, Twin Win Games is the place for you! We offer ample opportunities for personal development and professional growth. Join us as we continue to create innovative and exciting gaming experiences.
 

Ми будуємо власний CDN Edge сервер (ccdn-edged) — високопродуктивний демон на Go, що обробляє живий трафік через HTTP/1.1, HTTP/2 та HTTP/3 (QUIC). Це не черговий REST API. Це системне програмування: реверс-проксі, мережевий стек, оптимізація затримок, WAF, in-memory кешування і Edge Functions.

Шукаємо інженера, який розуміє як насправді працює HTTP, знає різницю між goroutine scheduler і OS thread, і якому цікаво копатись у кишках мережевих систем.

Технологічний стек

Мережевий шар:

    •    HTTP/1.1 & HTTP/2 — stdlib
    •    HTTP/3 / QUIC — quic-go
    •    Reverse Proxy — httputil + fasthttp
    •    TLS Fingerprinting

Безпека:

    •    Coraza WAF — інспекція трафіку
    •    TLS Client Identification
    •    Rate Limiting / Bot Detection

Стан та кеш:

    •    Redis — конфігурація зон, хостів, сертифікатів
    •    In-memory кеш об’єктів

Observability:

    •    VictoriaMetrics / Prometheus
    •    zerolog — structured logging
    •    Access logs via Unix-сокети
    •    Goja — JS Edge Functions (ES5.1+)

Середовище: Go 1.26, GOEXPERIMENT=jsonv2,greenteagc,synchashtriemap

Що обов’язково знати:

    •    Go 3+ роки в продакшені — goroutines, channels, sync primitives, memory model
    •    Глибоке розуміння HTTP/1.1, HTTP/2 (framing, multiplexing, flow control)
    •    Досвід написання реверс-проксі або мережевих серверів / клієнтів
    •    Розуміння TLS — handshake, certificates, ALPN, SNI
    •    Профілювання Go: pprof, trace, heap / goroutine dumps
    •    Робота з low-latency системами — буфери, zero-copy, escape analysis
    •    Redis: структури даних, pub/sub, pipeline

Буде плюсом:

    •    Знайомство з QUIC / HTTP/3 (RFC 9000, 9114)
    •    Досвід із fasthttp або іншими high-perf HTTP бібліотеками
    •    Розуміння WAF / ModSecurity rule engine
    •    Embedded JS runtime (Goja / V8 / QuickJS)
    •    Знайомство з VictoriaMetrics або Prometheus internals
    •    Досвід у CDN, DDoS-захист або edge computing

Важливо

Ця роль не підходить тим, хто спеціалізується виключно на REST API або бізнес-логіці. Тут потрібно розуміти, що відбувається на рівні TCP-з’єднання, як передаються фрейми HTTP/2 і чому zero-copy важливий для пропускної здатності. Якщо тебе цікавить «як все влаштовано зсередині» — ти потрібен нам.

Що ти будеш робити

    Розробляти та підтримувати ядро CDN Edge демона (ccdn-edged)
    •    Оптимізувати проксування трафіку — затримки, throughput, з’єднання
    •    Інтегрувати та налаштовувати WAF (Coraza) під реальний трафік
    •    Розвивати Edge Functions runtime на базі Goja
    •    Проектувати схеми кешування (L1 in-memory + L2 Redis)
    •    Писати benchmark-тести та профілювати критичні шляхи
    •    Брати участь у code review та архітектурних рішеннях

Умови роботи

    •    Повна зайнятість, Remote або Relocate
    •    Конкурентна зарплата — обговорюється на інтерв’ю
    •    Технічне завдання замість leetcode-тестів
    •    Невелика команда, прямий вплив на архітектуру
    •    Сучасний стек без legacy-обмежень
    •    Реальний high-load трафік з першого дня

Ajax Systems, an international tech company and the largest manufacturer of security systems in Europe.

We are looking for a new team member to join our System devisions as a Middle/Senior Android Developer.

The System Division is responsible for building and developing the Ajax software ecosystem. The team develops and maintains OS Malevich and the Video Management System, builds scalable cloud infrastructure, and creates client applications for multiple platforms, ensuring that all system components work together as a unified ecosystem.

The division works with Java, Kotlin, Swift, C, C++, and Python. It includes embedded, cloud, mobile, and desktop engineers who ensure the stable operation of Ajax as a single digital platform.

Required skills:

• 3+ years of experience in Android development;
• a strong familiarity with Java and Kotlin;
• good understanding of the Android ecosystem;
• familiarity with Android SDK: basic concepts like layouts and views, activities and fragments and their lifecycle, storing data;
• practical experience with Kotlin Coroutines;
• proficiency in Jetpack Compose for modern UI development;
• experience with ORM frameworks and Android Jetpack Components;
• strong understanding of code versioning tools (Git) and experience with Gradle;
• strong understanding of the full mobile development life cycle, OOP principles, design patterns;

• passion for software engineering, learning and continuous improvement.

   

Would be a plus:

• gradle knowledge, custom plugin development, build optimization, CI/CD pipelines, and release management;
• writing unit tests;
• practical experience with video streams;
• experience with MVVM/MVI patterns;
• experience with github actions;

• experience with third-party libraries, APIs (Firebase) and custom frameworks.

   

Tasks and responsibilities:

• follow high standards of software quality established in the team;
• design, build, and maintain high performance, reusable, and reliable code;
• suggest technical and functional improvements to add value to the product;

• collaborate with cross-functional teams to define, design, and ship new application features.

   

We offer:

• the opportunity to suggest and implement your own ideas that directly influence the product and its mass production;
• aplace in a fast-growing company with a motivated and professional team;competitive salary;
• medical insurance;
• corporate English classes;
• the opportunity to participate in Ajax’s internal beta-testing program for security systems;
• discounts from partner companies;

• discounts on Ajax products.

   

Ajax Systems is a Ukrainian success story that has grown into a global product. Ajax devices are trusted by more than 4.5 million end users and 330,000 PRO users in over 180 countries. The company provides comprehensive solutions to protect residential and commercial properties of all sizes. Today, Ajax portfolio includes 280 devices for intrusion protection, video surveillance, fire safety, and comfort and automation.

We’re looking for a Senior SEO Specialist to lead and execute advanced SEO strategies across multiple brands and markets. The role involves developing data-driven SEO roadmaps, optimizing technical performance, and driving measurable growth in highly competitive LATAM and Tier-1 markets.

Key Responsibilities:

• Develop and implement comprehensive SEO strategies and performance roadmaps.
• Conduct website audits, identify technical issues, and coordinate fixes with dev teams.
• Optimize site structure, metadata, and internal linking to boost organic visibility.
• Perform in-depth keyword research and identify new growth opportunities.
• Lead and manage link-building campaigns and maintain a healthy backlink profile.
• Track key SEO metrics, analyze results, and deliver actionable reports.
• Collaborate with content, design, and product teams to align SEO with business goals.
• Supervise SEO contractors or junior specialists and ensure quality execution.
• Stay up to date with Google algorithm updates and emerging SEO tools.

Required Skills & Experience:

• 3+ years of proven SEO experience in competitive LATAM/Tier-1 markets.
• Strong analytical mindset and deep understanding of Google ranking algorithms.
• Proficiency with SEO tools: Google Search Console, GA4, Data Studio, Ahrefs, SEMrush, Screaming Frog.
• Experience in link building, outreach campaigns, and CMS management.
• Basic understanding of HTML, CSS, and site architecture.
• English level: B1+ (written and spoken).

As a member of our team, you will also enjoy the following benefits:

• Paid Vacation: 21 working days of paid vacation per year.
• Sick Leave: 25 paid sick days per year — no medical certificate required.
• Personal Days Off: 3 paid personal days off per year — just for rest and balance.
• Sports benefits.
• Medical reimbursement.
• Flexible working conditions: You can discuss with your manager the balance between remote and in-office work that suits you best.
• Professional Development: a dedicated budget of $600 per year to support your continuous learning — seminars, courses, and conferences included.
• Business Trips: including visits to our main office in Cyprus and participation in international industry conferences — a chance to connect with the team in person and stay on top of key market trends.

We’re looking for a talented Fullstack Engineer with strong experience in Python, React.js, and AWS to join our team in an outstaff role for our client - a startup developing a CRM and project management platform for construction companies

You’ll be working directly with our core team, contributing to architecture decisions, implementing new features, and helping build a scalable, modern SaaS product in Agile environment

 

Frontend

• Experience with React.js
• Strong knowledge of JavaScript/TypeScript
• Experience with Redux
• Experience with AntDesign or similar UI libraries

Backend

• Strong experience with Python (Django)
• Experience with PostgreSQL or other relational databases
• Understanding of SOLID principles and common design patterns
• Experience with AWS and Docker

Nice to have:

• Experience with AI API Integrations

You will own and drive the global marketing strategy across SEO, Retargeting (DSP), and SMM, ensuring scalable growth and maximum ROI across multiple GEOs.

Responsibilities:

• Define and execute full-funnel marketing strategy across SEO, Retargeting, and SMM
• Build, structure, and scale marketing teams
• Own KPI framework (ROI, LTV, CPA) and drive channel performance
• Manage and optimize media buying, retargeting campaigns, and traffic sources
• Oversee SEO strategy (technical, content, link-building)
• Lead SMM with a focus on performance and conversion
• Establish reporting systems and analyze funnel performance
• Own budget allocation and optimize for maximum ROI
• Collaborate with Product, CRM, and Affiliate teams

Requirements:

• 5+ years in performance marketing (mandatory: iGaming / betting / gambling)
• 2+ years in leadership roles (Head / Lead level)
• Experience managing SEO, Retargeting / DSP, and SMM channels
• Experience building and scaling marketing teams
• Strong expertise in:
  • SEO
  • Performance marketing / media buying (CPA, ROAS, LTV)
  • Retargeting / DSP
  • SMM (performance-focused)
• Data-driven approach:
  • KPI management (ROI, LTV, CPA)
  • Reporting and funnel analysis
• Experience managing and allocating marketing budgets
• Fluent English (spoken and written)

What we offer:

• Paid Vacation: 21 working days of paid vacation per year.
• Sick Leave: 25 paid sick days per year — no medical certificate required.
• Personal Days Off: 3 paid personal days off per year — just for rest and balance.
• Sports benefits.
• Medical reimbursement.
• Flexible working conditions: You can discuss with your manager the balance between remote and in-office work that suits you best.
• Professional Development: a dedicated budget of $600 per year to support your continuous learning — seminars, courses, and conferences included.
• Business Trips: including visits to our main office in Cyprus and participation in international industry conferences — a chance to connect with the team in person and stay on top of key market trends.

Mail Wizards is an email marketing agency that works with ecommerce brands to increase their revenue through email. We're looking for a Klaviyo Project Manager to take full ownership of client accounts and drive measurable results.

What you'll do: 

- Manage Klaviyo accounts end-to-end for multiple ecommerce clients - Own key metrics: open rate, click rate, conversion rate, submit rate 

- Run A/B tests and execute data-driven hypotheses 

- Brief and manage copywriters and designers 

- Maintain and improve email deliverability (inbox placement, domain reputation, spam rate) 

- Communicate directly with agency founders

What we offer: 

- Competitive pay 

- All tools and subscriptions provided 

- Work directly with C-level 

- Growth potential within the agency 

- $2,000/year learning & development budget

Who we are

Adaptiq is a technology hub that helps high-growth product companies build, scale, and support strong R&D teams across different industries.
 

About the Product:

We support a multi-brand social gaming platform that provides real-time entertainment across web and mobile channels. The product combines a dynamic front-end, RESTful APIs, WebSocket services for live game sessions, and a complex back-end built to handle high user concurrency and large transaction volumes.

The platform is actively evolving, with weekly or bi-weekly releases that include new features, bug fixes, UI improvements, and third-party integrations — all without downtime. Since production issues can directly impact user engagement and revenue, quality, stability, and reliable test automation are essential.

The combination of scale, frequent releases, and real-time functionality creates a challenging technical environment where strong automation practices make a direct business impact.
 

About the Role:

As a QA Automation Lead, you will build the automation function from scratch and take ownership of the overall automation strategy, framework architecture, CI/CD integration, and team growth.

During the first months, the role will be highly hands-on: you will write and review automation code, set up test execution in pipelines, define quality standards, and participate in defect analysis. Over time, you will also help hire, onboard, and mentor automation engineers, establishing processes that ensure strong test coverage and fast feedback on every pull request.

You will work closely with developers, product managers, and manual QA engineers to translate product requirements into clear test plans and automation coverage. Your work will directly influence release quality, delivery speed, and overall engineering efficiency in a fast-paced product environment.
 

Key Responsibilities:

• Design, build, and maintain automated test frameworks for UI, API, and end-to-end testing.
• Integrate automated tests into CI/CD pipelines such as GitHub Actions, Jenkins, or similar tools.
• Set up quality gates for pull requests and ensure fast, reliable feedback for engineering teams.
• Lead and mentor QA engineers through code reviews, technical guidance, and daily support.
• Define testing standards, automation processes, documentation, and best practices.
• Own test coverage for assigned product areas and identify gaps before they reach production.
• Collaborate with developers and product managers to analyze requirements and create test plans.
• Manage defect triage, investigate test failures, coordinate fixes, and verify resolutions.
• Improve test reliability, execution speed, and maintainability.
• Identify quality risks and communicate them clearly to engineering and product stakeholders.
• Explore and introduce AI-assisted testing tools and modern automation approaches.
• Support recruitment and onboarding of new automation engineers as the team grows.
   

Required Skills and Experience:

• 5+ years of hands-on QA automation experience, including ownership of an automation codebase.
• Strong experience with Playwright and TypeScript in production-level automation frameworks.
• Solid JavaScript/TypeScript skills for building and maintaining automated tests.
• Experience with Cypress or Selenium may be considered if the overall automation background is strong.
• Proven experience integrating automated tests into CI/CD pipelines, such as GitHub Actions, Jenkins, or similar.
• Strong API testing experience with tools such as Postman, Supertest, or similar.
• Experience testing RESTful APIs; WebSocket testing experience is a strong advantage.
• Good understanding of Git workflows and agile software development practices.
• Experience mentoring QA engineers, conducting code reviews, and leading day-to-day QA activities.
• Familiarity with AI-driven testing tools and ability to assess their value in automation workflows.
• Strong communication skills and ability to explain quality risks to both technical and non-technical stakeholders.
   

Nice to Have:

• Experience testing gaming, entertainment, social gaming, or casino-style products.
   

Why Us:

• 20 days of paid vacation per calendar year, plus official public holidays in your country of residence.
• Full accounting and legal support in all countries where we operate.
• Remote-first work model, with a powerful workstation and co-working space option if needed.
• Competitive compensation package with annual performance and salary 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
You’ll be working on a complex, data-driven platform focused on monitoring and analyzing hardware performance in real time. The system collects large volumes of sensor data across different stages - from design and production to real-world usage - and transforms it into actionable insights.

The platform operates in distributed, cloud-based environments and relies on Kubernetes, CI/CD pipelines, infrastructure as code, and modern observability tools to ensure high performance, reliability, and scalability.
 

About the Role:
We are looking for a Senior DevOps Engineer to take ownership of infrastructure and deployment processes for a complex, customer-facing product.

You’ll join a small, distributed team with high ownership and contribute across the full lifecycle - from design decisions to production support.

The role focuses on cloud infrastructure, Kubernetes environments, CI/CD pipelines, and improving system reliability, observability, and performance. You’ll also collaborate closely with development teams to streamline deployments and automate workflows.
 

Key Responsibilities:

• Design and maintain CI/CD pipelines using GitHub Actions and related tools
• Manage infrastructure as code with Terraform and Terragrunt
• Work with cloud platforms (AWS / Azure / GCP)
• Operate containerized environments using Docker and Kubernetes (including Helm)
• Automate infrastructure and configuration processes using Ansible
• Monitor system performance with tools like Prometheus and Grafana
• Troubleshoot production issues and ensure system stability
• Collaborate with engineering teams to improve scalability and deployment processes
• Handle networking, DNS, and load balancing configurations
• Support customer-facing environments when needed
   

Required Competence and Skills:

• 5+ years of experience in DevOps
• Strong experience with GitHub and GitHub Actions
• Hands-on experience with Ansible
• Solid knowledge of Terraform
• Strong experience with Docker, Kubernetes, and Helm
• Experience with at least one cloud provider (AWS / Azure / GCP)
• Python and/or Bash scripting skills
• Understanding of networking, DNS, and load balancing
• Experience with monitoring tools (Prometheus, Grafana, etc.)
• Strong communication skills and ability to work in distributed teams
• English - upper-intermediate or higher
   

Nice to have

• Experience with Terragrunt
• Basic database knowledge
   

What we offer

• 20 working days of vacation + public holidays based on your location
• Full accounting and legal support
• Fully remote setup with an option to use a co-working space
• Competitive compensation with regular performance and salary 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:
The product is a fast-growing online entertainment platform focused on delivering browser-based games along with real-time interactive features. It serves an expanding audience and operates under conditions of high traffic, strict latency requirements, and secure micro-transaction processing within a social gaming environment.

The platform relies on a hybrid technology stack that combines a legacy codebase built with a widely used DOM-manipulation library and modern solutions based on React and Next.js. Current challenges include transforming legacy parts into a scalable, component-based architecture, implementing real-time interactions using WebSockets, maintaining consistency across mobile devices and browsers, and integrating payment and promotion management systems.

Strong engineering ownership is key to ensuring system stability, improving performance, and enabling fast, scalable feature delivery.

About the Role:
In this role, you will take ownership of frontend feature delivery from idea to production. You will work closely with frontend leadership, backend engineers, designers, QA, and DevOps to build and evolve a complex product.

A key part of your work will be driving the transition from a jQuery-based architecture to a modern React/Next.js setup. You will be expected to make architectural decisions, improve development workflows, and ensure high standards of performance, security, and code quality.

This position requires strong independence, solid technical judgment, and the ability to work in a fast-paced, evolving environment.
 

Key Responsibilities:

• Improve and maintain existing jQuery-based interfaces
• Build scalable and responsive UI using React and Next.js
• Refactor and structure CSS/SCSS for long-term maintainability
• Ensure cross-browser compatibility and strong mobile experience
• Implement and support real-time features using WebSockets
• Apply frontend security best practices
• Contribute to the design of a reusable component architecture
• Integrate APIs and collaborate closely with backend teams
• Set up and improve build tools and performance monitoring
• Implement and manage state using Redux, MobX, or similar
• Work with designers to deliver high-quality UI
• Develop key features such as payments, authentication, and promotions
   

Required Competence and Skills:

• 6+ years of experience in frontend development on production systems
• Strong experience working with legacy codebases (jQuery)
• Solid knowledge of React (Hooks, functional components)
• Hands-on experience with Next.js (SSR, SSG, API routes)
• Strong CSS/SCSS skills and responsive design expertise
• Proficiency in JavaScript (ES6+) and TypeScript
• Experience with WebSockets and async patterns
• Understanding of performance optimization and Core Web Vitals
• Familiarity with build tools like Webpack, Vite, or Gulp
• Experience integrating REST APIs
• Strong debugging and cross-browser troubleshooting skills
• Experience with state management libraries
• Git proficiency and experience working in teams
• Strong communication skills and ability to work independently
   

Nice to Have:

• Experience introducing TypeScript into existing projects
• Basic knowledge of PHP
• Experience with testing tools (Jest, RTL, Cypress)
• Experience with animation libraries like GSAP
• Familiarity with design tools (Figma, Zeplin, etc.)
• Understanding of CI/CD processes
• Knowledge of SEO and analytics
• Experience with hybrid mobile solutions (e.g., Cordova)
   

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 offer a highly competitive package with yearly performance and compensation reviews.

Project Description

The system is based on microservice architecture and is running on the general purpose CPUs. It doesn’t require using ASICs and make possible to run the SW both on the bare metal servers as well as on the private cloud infostructure. CableOS is a pioneer in DOCSIS software defined networking (SDN) with all the benefits it gives to the service providers.

Job Description

• Experience of 2+ years in SW testing of complex systems (preferable embedded/network equipment)
• Practical experience with testing artifacts: test plan, test design, test case, bug report
• Basic practical knowledge in networking area
• Good knowledge of Unix/Linux OS
• High level of interpersonal skills. Ability to communicate effectively with different groups.
• B. Sc. In computer science or Electricity Engineering or equivalent

Would be a plus:

• Knowledge in DOCSIS / PON (Passive Optical Network)
• Data traffic generators (Ixia, iPerf.) and analyzers (Wireshark, Averna)
• Script tools/languages (Python, Bash, etc.)
• Hands-on experience with virtualization technologies (Kubernetes, Docker).

Job Responsibilities

• Test (functional/non-functional) complex embedded system
• Debug and troubleshoot setup issues
• Analyze requirements, write/execute test cases/test plans, report bugs.
• Execute automatic tests using existing Framework and analyze the results. Provide requirements for automatic tests
• Work in agile mode as a member of scrum team
• Write automation scripts can be considered.

Mulesoft Integration Specialist (API & Enterprise Integration)
Locations: Europe, Ukraine

The ideal candidate brings strong experience in enterprise integration initiatives, with a primary focus on MuleSoft-based solutions and API-driven architectures. The background should include participation in platform modernization programs, development and support of complex integration ecosystems, and continuous improvement of enterprise integration landscapes.

Key Role In Integration Programs:

Serves as an integration specialist contributing across multiple phases of integration initiatives, from early discovery and design discussions to implementation, stabilization, and ongoing support.

Regularly collaborates with business analysts, architects, and operations teams to clarify integration requirements, identify risks early, and ensure solutions remain maintainable over time.

Known for taking ownership of integration components and following them through their full lifecycle.

Core Competencies And Expertise:

MuleSoft & API Engineering:

Hands-on experience with MuleSoft Anypoint Platform across a variety of integration use cases

Practical application of API-led architecture to support loosely coupled systems and incremental platform evolution

Development and consumption of RESTful and SOAP-based services

Confident work with JSON and XML payloads, including transformation and validation using DataWeave

Experience enhancing existing integrations through refactoring, improved error handling, and performance tuning

Data, Migration & Backend Systems

Involvement in data migration and data synchronization initiatives as part of broader system transformations

Working knowledge of SQL and relational databases, used for validation, reconciliation, and issue analysis

Experience navigating complex data models and resolving cross-system data inconsistencies

Exposure to integrations involving CRM, ERP, and operational platforms

Collaboration, Communication & Ownership

Regular interaction with business and technology stakeholders to clarify requirements and align expectations

Ability to explain integration concepts in a clear and structured manner to mixed audiences

Strong documentation habits, including integration overviews, API descriptions, and operational notes

Demonstrates a strong sense of responsibility for delivered solutions, particularly during critical releases

Able to remain focused and pragmatic when addressing production issues or time-sensitive requests

Delivery & Ways Of Working:

Comfortable working both independently and as part of distributed Agile teams

Experience adapting to changing priorities while maintaining delivery commitments

Contributes to shared team goals by supporting peers and proactively addressing integration risks
 

Key Achievements:

Contributed to multiple enterprise integration initiatives supporting evolving business processes

Played an active role in stabilizing and improving legacy integrations

Supported data migration and system alignment efforts during platform transitions

Recognized for reliability, ownership, and collaborative approach within integration teams

Technical Environment:

MuleSoft Anypoint Platform, REST, SOAP, API-led Architecture, DataWeave, XML, JSON, SQL, Relational Databases, CloudHub, API Manager, Git, CI/CD tools, Jira, Confluence

Certifications

Salesforce Certified MuleSoft Developer

Dell Boomi Professional API Design (nice to have)

Education:

Bachelor of Science in Systems Engineering

Summary:

Senior MuleSoft Integration Specialist with a broad background in enterprise integration work and API-driven solution delivery. Combines solid MuleSoft expertise with strong collaboration skills and a high level of ownership. Experienced in supporting integration solutions over time, adapting to evolving business needs, and contributing to stable, well-documented integration landscapes.