Jobs at Djinni

Join our dynamic team at CoreWillSoft GmbH as a QA Engineer! We build innovative security software for critical facilities and infrastructure, combining building automation, IoT, and physical access control to protect what matters most. 

We are looking for an experienced QA Engineer to join our team in ensuring the quality and reliability of our products that are used by multiple businesses across Europe, USA and Canada. Our Agile team operates from multiple locations with headquarters in Bonn, Germany, and is responsible for the complete software development lifecycle; including initiating, implementation, and operation of the physical access control software operating multiple electronic locks over different radio protocols and RFID identification media. 

This is an exciting opportunity to work on cutting-edge projects involving high-security hardware and technology in a creative, international environment. You will have the chance to work with a talented team and make a real impact on our customers' businesses. 

What you`ll do: 

• Prepare QA related documentation that align with the product and company needs. 
• Perform testing on physical security systems and extensions, ensuring their functionality and reliability. 
• Collaborate closely with the Product Manager and development team to supervise product quality. 
• Continuously develop testing processes and methodologies to improve product quality and efficiency. 
• Analyze product performance metrics and provide insights for improvements. 
• Work with cross-functional teams, including engineering, sales, and support, to ensure a seamless customer experience. 
• Stay up-to-date with industry trends and best practices in quality assurance. Willingness for the professional self development inside the QA team and on the company level. 

What we offer: 

• Meaningful Impact: Build solutions that are used every day by thousands of businesses your work will directly improve real-world security and connected device experiences. 
• Product & Process Ownership: Help shape not only the product, but also how we build and deliver it  your ideas and decisions will have visible impact. 
• Industry Influence: Contribute to key security standards and best practices, staying ahead of the curve in a fast-evolving industry. 
• Modern Tech Stack & Hardware: Work with the latest hardware and the tools you need to do your best work. 
• Time Off & Flexibility: Vacation days, paid sick leave, and public holidays in line with German legislation plus flexibility built around outcomes, not micromanagement. 
• Learning & Development Budget: We support continuous growth by covering hard and soft skills courses, trainings, and access to e-learning platforms. 
• Coworking Support: Prefer not to work from home every day? We offer coworking compensation so you can choose the environment that fits you best. 
• Language Learning Support: Monthly fixed compensation you can use to improve your English or German through the learning format of your choice. 
• Strong Team Culture: Open collaboration, a flat structure, and thoughtful onboarding your voice is heard, and you can make an impact from day one. 

What you`ll bring: 

• Experience in manual and automated QA testing (web, mobile and/or desktop), preferably in physical security systems or similar domains. 
• Strong understanding of QA methodologies, tools, and processes. 
• Knowledge of the Software Development Lifecycle 
• Experience with test planning, execution, and reporting. 
• Strong communication and collaboration skills. 
• Advanced English language knowledge 
• Experience with product development methodologies (Agile, SCRUM / Kanban) 
• Strong analytical and problem-solving skills, with a focus on continuous process improvement on the product and company level. 
• Basic knowledge of computer science, scriptwriting, system topology understanding, networking infrastructures and protocols understanding, familiarity with database management systems. 
• Experience in API testing. 
• Experience in AI usage in testing activities 
• Tooling knowledge e.g. git, UNIX command-line tools, curl, Charles Proxy, Wireshark, development tools.  
   

Nice to have: 

• Experience with IoT products in building automation and physical access control. 
• Degree in Computer Science, Engineering, or related field. 
• Understanding of general security concepts. 
• German language skills. 
• Automation testing. 
• AWS EC2 knowledge 

With over 70 products and 3 billion installs worldwide, AIBY is at the forefront of mobile and web app development with a focus on AI technology. Innovation and team spirit are the backbones of our company, and thanks to them, we’re proud of titles like ChatOn, iScanner, ARTA, Forma, OnSkin, Plantum, and many others. At AIBY, you can enjoy the work you do while helping millions of people.

Web is where we’re building what comes next. In 2025, web grew 10x year-over-year — and by mid-2026, we’re already close to repeating that entire year’s numbers. Now we’re looking for a Head of Web Growth to join one of our Business Units and take the web even further: from a strong growth engine to the dominant revenue driver across its app portfolio.

You’ll report to the CEO of the BU and lead a team of growth managers, who are already delivering solid results. Your job is to help them aim higher and build the systems that make strong performance repeatable.

What you will do:

• Own web revenue performance across the unit and set the direction for how the team moves these numbers
• Audit current web growth processes and build the strategy from there
• Lead the shift to web-to-web as the primary growth format — scaling what works and fixing what doesn’t
• Lead, mentor, and develop a team — raise the hard skills bar, drive accountability, and create the kind of environment where ambitious targets feel energizing rather than exhausting
• Work closely with heads of product, marketing, analytics, and engineering to move initiatives from strategy to execution

What you should have:

• 5+ years of experience in growth or product marketing within subscription-based environments, with a strong focus on web and web-to-web
• 3+ years of leadership experience managing growth teams and driving cross-functional collaboration across product, marketing, analytics, and engineering
• Proven track record of taking subscription products through different stages: you’ve launched from scratch, scaled what was already working, and diagnosed why something that should be growing isn’t
• Deep understanding of unit economics and web growth metrics: CAC, LTV, ROAS, retention, churn, funnel conversion — and how they connect to each other
• Understanding of how LTV prediction models are built and what drives them
• Experience with payment infrastructure: you know how subscription billing works end-to-end
• Hypothesis-driven approach to growth: you build experiments, read results honestly, and iterate fast
• Sharp analytical thinking — you work comfortably with numbers, notice what others miss, and can translate data into decisions
• Solid people management instincts — you know how to develop talent
• Strong written and spoken English

What we offer:

• Results-oriented colleagues committed to scaling impactful products. Your team will help you achieve the most ambitious goals
• Remote-friendly work environment with high autonomy and minimal bureaucracy
• Competitive fixed salary+ generous performance-based bonus
• Medical insurance (depending on the location)

• Paid vacations, sick days, and other benefits

   

Location

AIBY is a team of strong international top talents. This role allows for either hybrid (combining in-office and remote work), fully remote or in-office work.

We are looking for a Senior iOS Engineer to join a long-term mobile product in the European e-commerce and e-health domain.

This role is focused on the technical foundation of a large production application. You will work on architecture, modularization, performance, stability, and developer experience while supporting several cross-functional product teams.

What you will do

• Design and evolve a scalable, modular iOS architecture
• Define technical standards and contribute to architectural decisions
• Improve application performance, stability, and maintainability
• Strengthen unit testing practices and overall test coverage
• Improve CI/CD pipelines, build times, and release processes
• Review critical technical solutions across multiple teams
• Reduce technical debt and improve shared platform components

• Collaborate with engineers, product managers, and designers

   

Required experience

• Strong commercial experience with Swift
• Hands-on experience with SwiftUI
• Experience building and maintaining large production iOS applications
• Strong knowledge of MVVM, Clean Architecture, or similar architectural patterns
• Experience with modular application architecture and Swift Package Manager
• Good understanding of Swift concurrency and memory management
• Strong unit testing and debugging skills
• Experience with CI/CD and mobile release processes

• Confident spoken and written English

   

Tech stack

Swift, SwiftUI, MVVM, Swift Testing, Swift Package Manager, Xcode Cloud, latest iOS SDK

Project

• Full-time engagement
• International English-speaking team
• Product used in the European pharmacy, e-commerce, and e-health market

• Strong focus on engineering quality and long-term product development

   

Interview process

1. Interview with our HR team
2. 15-minute introductory call with a client representative
3. 30-minute client screening
4. Two-hour technical interview

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for a Senior Software Development Engineer in Test!

Requirements:

• 5+ years in SDET or automation engineering role
• Deep Python knowledge: OOP (MRO, descriptors, magic methods), iterators, decorators, context managers, common design patterns; Clean Code as a baseline habit
• Comprehensive API testing: REST internals, contract validation, edge cases, auth flows (OAuth2, JWT); proficiency with httpx/requests or similar
• Practical gRPC experience: proto definitions, Unary and Server-Streaming calls, status codes, metadata; ability to write and maintain gRPC test clients from scratch
• Systematic approach to test stabilization: flakiness root-cause classification, retry logic, deterministic teardown, test data isolation
• pytest mastery: fixtures, conftest hierarchy, plugins, markers, parametrize; experience contributing to a shared multi-team automation framework
• Solid GitLab CI: multi-stage pipelines, job dependencies, artifacts, triggered pipelines, parallelization, job-level troubleshooting
• Clear technical documentation: test strategies, coverage maps, risk assessments; ability to communicate trade-offs to both engineering and product teams

Will be plus

• Web automation (Playwright/Selenium), POM pattern, cross-browser testing
• XRay/Jira: test case management, JQL, test plans and test sets
• ReportPortal: launch hierarchy, nested steps, pytest integration
• Experience building internal QA tooling (dashboards, schedulers, integrations)
• Familiarity with web-gRPC (sonora or similar) and HTTP/2 transport nuances

• Basic exposure to performance testing concepts (JMeter, Locust)

   

  Responsibilities:

• Actively contribute to the improvement of the test framework and testing infrastructure.
• Mentor QAE in test automation practices and best approaches.
• Perform regular code reviews to maintain high code quality and consistency.
• Safeguard product quality through proactive testing and automation strategies.
• -Access automation needs in Domain

• -Promote automation excelence among the SDETs in Domain

   

  Our benefits to you:

• ☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance, and more
• 🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed
• 🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided
• 🏖Paid vacations, sick leave, personal events days, days off
• 💵Referral program — enjoy cooperation with your colleagues and get the bonus
• 📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences
• 🎯Rewards program for mentoring and coaching colleagues
• 🗣Free internal English courses
• ✈️In-house Travel Service
• 🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more
• 🎳Other benefits could be added based on your location 
   

Performa is an international HR agency specialising in connecting top talent with leading companies across the iGaming, IT, and Marketing industries. We help businesses scale their teams and support professionals in finding opportunities where they can unlock their full potential.

 

Our client is a fast-growing international AI-native product company developing an innovative SaaS platform that helps businesses automate complex workflows, process large volumes of data in real time, and build intelligent, scalable products. AI is deeply integrated into both the product and the engineering culture, with modern development practices and continuous innovation at the core of the company's approach.
 

The engineering team works with a modern technology stack, follows high software quality standards, and encourages ownership, collaboration, and continuous improvement. As the product continues to scale, the company is looking for an experienced Chief Technology Officer to lead its technology vision while remaining actively involved in product development.
 

Role Overview

We are seeking a hands-on Chief Technology Officer (CTO) who combines strong technical expertise with proven leadership and business acumen. The ideal candidate will drive the company's technology strategy while remaining actively involved in software development, lead and mentor the engineering team, and represent the technical vision of the product to clients and stakeholders.

This role requires the ability to translate complex technical concepts into clear business value, collaborate closely with product and commercial teams, and ensure the successful delivery of a scalable, AI-driven platform.
 

Requirements:

• Software development experience.
• 6+ years of strong Python development experience.
• Proven expertise with Django and Celery.
• 1+ years of solid Angular 19 frontend development experience.
• AI/ML knowledge and practical implementation experience.
• Strong understanding of software architecture and scalable system design.
• Ability to translate business requirements into technical solutions.
• Experience using modern AI-powered development tools to increase productivity.

Key Responsibilities

• Architect and develop AI-powered solutions and intelligent agents.
• Design and maintain scalable backend systems using Python, Django, and Celery.
• Build modern frontend applications using Angular 19 and Tailwind CSS.
• Integrate machine learning models into production environments.
• Drive product decisions and contribute to product strategy.
• Collaborate with stakeholders to define requirements and priorities.
• Mentor team members and promote engineering best practices.
• Combine technical leadership with product ownership to ensure successful product delivery.

What we offer:

• Competitive salary.
• Equity participation opportunities.
• Flexible remote work environment.
• Health insurance and wellness budget.
• Learning and conference budget.
• Latest hardware of your choice.
• Opportunity to have a direct impact on both product and technology decisions.

About the Role

We are looking for a detail-oriented CRM Manager to join our growing iGaming team. In this role, you will be responsible for building, executing, and optimizing customer communication journeys across multiple channels to increase player engagement, retention, and lifetime value. You’ll work closely with the design, content, and marketing teams to deliver personalized, high-performing campaigns that enhance the player experience.

Key Responsibilities:

• Develop and manage customer journeys and automated CRM workflows.
• Create and execute multi-channel communication campaigns, including
• Email, SMS, and In-App messaging.
• Manage and update promo pages, banners, and campaign assets, ensuring a seamless user experience.
• Collaborate with design and content teams to ensure consistency in
• Ensure smooth CRM operations and data accuracy across all touchpoints.

Requirements:

• Proven experience in CRM operations or lifecycle marketing, preferably in the iGaming industry.
• Hands-on experience with GR8 Tech platform.
• Familiarity with HTML email templates and basic design workflows
• Strong understanding of multi-channel CRM communication (Email, SMS, In-App).
• Ability to create and manage automated player journeys and lifecycle campaigns
• Experience working closely with creative teams (design, content, and development).
• Ability to work independently

Cargofy is building the AI-native operating system for global freight. Cargofy deploys autonomous AI agents that automate procurement, dispatching, negotiations, tracking, and operations for carriers, shippers, and 3PLs across the US, Europe, and Asia. Our platform processes 100,000+ loads per day and hundreds of thousands of real-time events — replacing manual logistics with fully autonomous AI.

We need an AI Creator to put product video on a production line and make Cargofy as recognizable on screen as it is in the market.

Why This Role Exists Now

Logistics operators deciding whether to trust an autonomous agent with their dispatching don't want to read about it. They want to see it run. We ship fast — agents go to production in weeks. The old video model can't keep pace. So we're doing it the way a company that sells digital workers should: with AI. Your job is to turn that into an engine.

What Winning Looks Like

• Product video ships on the same clock as the roadmap, not weeks behind it
• Every launch has a clip; sales has assets that close instead of explain
• Cargofy has a recognizable visual language across every channel — not a folder of one-offs
• A library of reusable templates and workflows so production scales without starting from zero

What You Will Own

• Product videos — 30–60 second clips showing what Cargofy actually does, script to finished clip, end to end
• Channel distribution — cut one source into ready versions for LinkedIn, YouTube, events, and ads
• Content coverage — feature releases, product launches, case studies, sales and onboarding assets
• Production system — templates and workflows that scale output without scaling headcount
• Visual language — iterate on tone, visuals, and pacing until the look is unmistakably Cargofy

Who You Are

• Already making strong short-form video with AI tools — Runway, Kling, Veo, HeyGen, Pika, ElevenLabs, or similar
• Show the work rather than describe it
• Understand B2B product marketing — what a clip is for, not just how it looks
• Deliver finished videos, not source files for someone else to finish
• Experience with AI video for SaaS or tech products is a plus

Why Cargofy

• A clear mandate to build with AI, not against a headcount cap
• Fast cycles — script to brief to clip in days, not weeks
• Direct line to the team and the product, with real ownership of the output
• Contract, part-time / project-based to start — full-time on the table if it's a match
• Remote-first with offices in Kyiv, Warsaw, and Houston

Cargofy is building the AI-native operating system for global freight. Cargofy deploys autonomous AI agents that automate procurement, dispatching, negotiations, operations, tracking, and workflows for carriers, shippers, and 3PLs across the US, Europe, and Asia. Our platform processes 100,000+ loads per day and hundreds of thousands of real-time events — replacing manual logistics with fully autonomous AI.

We need an Integration Engineer (PHP/Laravel) to build and maintain the connectors that plug our AI agents into the systems logistics runs on — load boards, TMS platforms, telematics, finance, e-sign, and communication services. The catalog is large and growing constantly: there will always be a next connector.

Why This Role Matters

Our AI agents are only as capable as the systems they can reach. An agent that finds loads needs load boards like DAT. An agent that negotiates needs telephony and email. An agent that files documents needs e-sign. Every connector you ship gives every agent on the platform a new capability — and every customer gets it within days.

What You Will Do

• Build and maintain integrations with third-party systems: load boards, TMS and ERP platforms, telematics/ELD providers, LTL carriers, finance and e-sign services, messaging and telephony
• Design connectors that survive the real world: rate limits, flaky third-party uptime, breaking API changes, retries/backoff, idempotency
• Build two-way sync flows — loads in, statuses and documents back out — where the customer's system stays the system of record
• Wrap legacy APIs (SOAP/XML, government e-services) into clean internal interfaces our agents consume
• Own connector health: monitoring, alerting, and recovery for integrations processing events at scale

Tech Stack

• PHP 8.x — strong OOP, PSR standards, clean code
• Laravel — queues (Redis + Horizon), jobs, events, service container
• REST, OAuth2, webhooks; SOAP/XML for legacy APIs
• PostgreSQL, event-driven architecture
• PHPUnit, CI/CD pipelines, Docker

Who You Are

• 3+ years of production PHP/Laravel experience, with real third-party API integration work behind you
• You treat other people's APIs as a hostile environment — you design for failure, not the happy path
• You can read undocumented or badly documented APIs without waiting for support tickets
• Independent and proactive — a new connector is a project you scope and ship, not a task you receive
• Logistics domain experience (TMS, load boards, ELD) is a strong plus, not a requirement

Why Cargofy

• Your connector ships to production within days and immediately powers AI agents used by thousands of logistics companies
• Work at the frontier of applied AI — the integrations you build are what lets our agents make real phone calls, book real loads, and file real documents
• Competitive compensation + stock options for top performers
• Clear OKR system, strong engineering culture, and a team that ships daily
• Remote-first with offices in Kyiv, Warsaw, and Houston

We are looking for a Head of Revenue Growth. You will own the full revenue engine across a portfolio of mature, monetizing platforms in social discovery and live-streaming, not one funnel, not one channel, but the whole picture. That means P&L accountability, paid acquisition across mobile and web, monetization strategy, product growth experiments, and the unit economics that tie it all together. You will work directly with the CEO, Head of Marketing, Head of DS & AI, and five Product Owners . We move fast, cut through bureaucracy, and give real ownership to people who can handle it. If that sounds like your kind of environment, read on.

About United Tech: We are a global IT product company building the next generation of mobile and web platforms in live-streaming and social networking. Our products connect millions of users across North America, Europe, LATAM, and MENA, and we have been profitable doing it. Founded in Ukraine, operating worldwide, with a market we expect to exceed $206B by 2030. We are not chasing that number, we are already in the middle of it.

In this role, you will

• Own the full revenue funnel and its P&L from acquisition to repeat payments — accountable to ROAS LT0/LT7/LT30 targets and blended payback
• Develop and execute the revenue growth strategy across paid traffic (mobile + web), product growth, and monetization, owning channel mix, budget allocation, and scaling decisions
• Generate, prioritize, and validate growth and monetization hypotheses with Product and Tech, driving prioritization of Product Owner backlogs for growth work
• Lead A/B and multivariate testing across onboarding, activation, paywalls/coin-packs, and pricing
• Own unit economics (CAC, LTV, ARPU, ARPPU, ROAS, payback) and the cohort LTV model; ensure scalable, margin-aware growth given streamer revshare
• Partner with Payments and Risk to maximize payment conversion and approval rates, and expand margin-accretive web/direct billing

• Build revenue dashboards and a single source of truth for performance metrics, with shared metric definitions and transparency across teams

   

It's all about you

• Strong hands-on experience in growth / performance marketing for dating, social discovery, live-streaming, or IAP products, across both mobile apps and web funnels
• Demonstrable strong command of unit economics (CAC, LTV, ARPU, ARPPU, ROMI, payback, contribution margin) — able to build the model, not just read it
• Proven experience scaling paid acquisition on mobile and web: Google, Meta, TikTok, and programmatic/DSP (e.g., Moloco) are a strong advantage
• Solid experience with A/B testing, experimentation frameworks, and funnel optimization
• Strong analytical foundation: SQL and BI tools (e.g., Looker/Tableau), cohort analysis, predictive LTV; working knowledge of mobile attribution/MMP (AppsFlyer/Adjust), web analytics and server-side tracking (GA4, Meta CAPI), web2app deep-linking, and incrementality testing
• Experience managing growth, marketing, or media-buying teams
• Advanced user of Anthropic and OpenAI tools
• Fluent in English (B2+) and Ukrainian

Would be a plus

• Experience in payments, payment product management, or working closely with PSP/acquiring teams

What we offer

Care and support:

• 20 paid vacation days, 15 sick leave days, and 6 additional days off for family events
• 100% medical insurance coverage
• Sports and equipment reimbursement
• Team building events, corporate gifts, and stylish merch
• Financial and legal support
• Maternity Recovery Support Allowance
• Position retention and support for those who join the Armed Forces of Ukraine
• Participation in social initiatives supporting Ukraine

Comfortable working environment:

• Work from our Kyiv hub or remotely with a flexible schedule
• Modern equipment or depreciation of your own tools

Investment in your future:

• Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche
• 70% of our heads and leads have grown into their roles here – so can you!
• Performance-oriented reviews and Individual Development Plans (IDPs)
• Reimbursement for professional courses and English classes
• Corporate library, book club, and knowledge-sharing events

Hiring process

• Intro call
• Interview with the hiring team
• Bar-raising interview
• Reference check
• Offer

We are looking for a Middle Manual QA Engineer (WEB/Admin). Quality is not a final check for us — it's embedded in every stage of how we build. Our live-streaming platform serves hundreds of thousands of monthly active users across Tier-1 markets, and the web and admin layer is mission-critical infrastructure that touches everything: from payment flows and A/B experiments to real-time features that users interact with daily. You'll join a mature QA function — a team of 13+ QA specialists across platforms and backend — and work closely with frontend developers, product managers, and tech leads to catch issues early, own your feature areas end-to-end, and raise the bar for what "release-ready" actually means.

About our product: We are building one of the most powerful live-streaming platforms, already connecting 400K+ monthly active users through live events, interactive video chats, and real-time community experiences. Our mission is bold: bring joy, fight loneliness, and deliver safe, ad-free entertainment that keeps people coming back. This is a complex, fast-moving space, and we love it that way! So, you will join a passionate, expert team tackling everything from scaling AI-powered recommendations to launching high-impact, data-driven features that boost monetization and engagement. Every idea counts here, and every release reaches a massive global audience. We are among the Top 5 streaming products in the US and rank in the Top 10 worldwide. Our next milestone: break into the global Top 5, and we are moving fast to make it happen. Are you in?

In this role, you will

• Own manual testing of web and Admin panel end-to-end as a QA feature owner
• Run smoke, sanity, and regression testing cycles for WEB/Admin applications
• Create and maintain test documentation: test cases, bug reports, checklists
• Actively participate in SCRUM ceremonies and SDLC activities — refinements, decomposition, estimations
• Conduct A/B testing and validate experiment setups and results
• Investigate, reproduce, and report bugs with clear prioritization and full reproducibility

It's all about you

• 2+ years of experience in WEB and backend manual testing
• Hands-on experience with API testing and tools like Postman and Swagger
• Experience working with any relational or non-relational database 
• Confident understanding of Scrum processes and SDLC
• Experience with A/B testing
• Proficiency in Jira and Confluence
• Strong analytical thinking and the ability to grasp new concepts quickly
• English at B1 level or higher

Would be a plus

• Experience with MongoDB Compass (querying, data manipulation)
• Marketing or analytics testing background
• Familiarity with proxy debugging tools (Charles, Fiddler, or similar)
• Experience with Claude Code or other AI-assisted development tools

What we offer

Care and support:

• 20 paid vacation days, 15 sick leave days, and 6 additional days off for family events
• 100% medical insurance coverage
• Sports and equipment reimbursement
• Team building events, corporate gifts, and stylish merch
• Financial and legal support
• Maternity Recovery Support Allowance
• Position retention and support for those who join the Armed Forces of Ukraine
• Participation in social initiatives supporting Ukraine

Comfortable working environment:

• Work from our Kyiv hub or remotely with a flexible schedule
• Modern equipment or depreciation of your own tools

Investment in your future:

• Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche
• 70% of our heads and leads have grown into their roles here – so can you!
• Performance-oriented reviews and Individual Development Plans (IDPs)
• Reimbursement for professional courses and English classes
• Corporate library, book club, and knowledge-sharing events

Hiring process

• Intro call
• Technical interview 
• Test task
• Final Interview
• Reference check
• Offer

Are you passionate about building secure, high-performance platforms? We are looking for a Senior Java Developer to join our team and work on a cutting-edge security platform. This is a remote role open to candidates across Europe and Ukraine.
At Sigma Software, we create innovative solutions for complex ecosystems, ensuring security, scalability, and compliance at every step. You will be part of a talented engineering group designing the unified access layer for distributed services.
Why join us? You will work on a mission-critical project with advanced security architecture, collaborate with skilled professionals, and contribute to a platform that supports global-scale operations.

CUSTOMER

Our customer is a leading EdTech company that uses AI and data-driven technologies to personalize learning experiences, optimize user engagement, and improve marketing effectiveness through advanced audience targeting and analytics.

PROJECT

The project focuses on developing a centralized platform access layer that combines API gateway capabilities, service orchestration, data composition, and fine-grained authorization mechanisms. The platform provides a secure foundation for governance across the ecosystem, supporting complex organizational hierarchies, regional compliance requirements, and consistent policy enforcement.

JOB DESCRIPTION 

• Design and evolve the platform access architecture for a large-scale distributed ecosystem
• Build and maintain a unified API layer over multiple distributed services
• Implement fine-grained ABAC authorization at scale, supporting complex hierarchies and relationships
• Develop fail-closed security architectures with strict enforcement guarantees
• Manage regional compliance, data residency, and routing requirements
• Ensure consistent data visibility rules across all products and services
• Design high-performance authorization evaluation systems and policy engines
• Maintain auditability, traceability, and security transparency mechanisms
• Collaborate with platform and product teams on API and access design
• Contribute to architectural decisions and security standards

QUALIFICATION

• At least 5 years of commercial software engineering experience
• Strong expertise in Java development
• Strong proficiency in Java 21+ and modern Java features, including virtual threads, NIO, and concurrent programming
• Hands-on experience building high-performance backend systems with a strong focus on scalability and low latency
• Experience working with GraalVM Native Image and optimizing Java applications for native execution
• Solid understanding of HTTP protocol internals, connection management, streaming, and API performance optimization
• Experience processing large volumes of JSON using streaming APIs and memory-efficient techniques
• Strong knowledge of performance tuning, profiling, benchmarking, and JVM optimization
• Experience designing and implementing caching strategies and cache invalidation mechanisms
• Solid understanding of authentication, authorization, and security best practices in distributed systems
• Experience building or maintaining API gateways, proxies, load balancers, service mesh components, or other infrastructure-level services
• Strong understanding of event-driven architectures and distributed systems design
• Experience writing comprehensive automated tests for performance-critical and protocol-level components
• Upper-Intermediate or higher English proficiency

WILL BE A PLUS

• Experience with Netty and high-performance networking applications
• Experience with service mesh technologies such as Istio, Envoy, or Dapr
• Hands-on experience with authorization frameworks such as OPA, Cedar, Zanzibar, or Oso
• Experience with Google Cloud Platform, including Pub/Sub, BigQuery, Memorystore, or Redis
• Experience deploying and operating applications on Kubernetes
• Familiarity with gRPC, Protocol Buffers, and HTTP/2
• Experience working in regulated domains such as Healthcare, Education, or FinTech
• Knowledge of jlink, AppCDS, CRaC, or other JVM optimization technologies

PERSONAL PROFILE

• Proactive and detail-oriented
• Thrives in collaborative environments
• Enjoys solving complex integration challenges
• Comfortable experimenting with new technologies
• Committed to improving data systems

PayGames is a one-stop solution for running an online business while benefiting financially. We provide comprehensive B2B solutions, enabling businesses to integrate online payments seamlessly in just one step. As a dynamic and forward-thinking Holding, we embrace flexibility and innovation, encouraging fresh ideas for product and process improvements.
We are looking for experienced International Counsel to join our team!

Requirements:

• 2+ years of experience in international companies or as an in-house lawyer.
• Experience in IT, fintech, payments, consulting, iGaming, or digital business.
• Strong knowledge of contract, corporate, financial, and related areas of law.
• Experience in legal research and analysis of complex legal matters.
• Excellent drafting and negotiation skills.
• Ability to identify risks and provide practical legal solutions.
• Ability to work independently and manage multiple priorities.
• Upper-Intermediate+ English (spoken and written).
• Understanding of the payment industry will be a plus.

Responsibilities:

• Drafting, reviewing, negotiating, and approving contracts and legal documents.
• Assessing and mitigating legal risks related to company operations.
• Conducting legal research and preparing recommendations for management.
• Assisting with legal issues in different jurisdictions.
• Completing questionnaires, collecting documents, and communicating with partners, regulators, and authorities.
• Working closely with product, tech, compliance, support, and business teams to resolve legal matters and support business.

We are looking for a Head of Design to lead and scale the design function within a product-focused iGaming company. This role is about more than aesthetics — it is about building a strong visual identity that earns user trust, creates emotional engagement, and directly impacts key business metrics such as conversion, retention, and revenue.

You will drive design strategy, shape user experience, and build a high-performing team capable of delivering scalable and high-impact solutions.

🎯 Key Responsibilities

• Design and continuously improve mobile-first user flows with a focus on conversion and usability.
• Use design as a performance lever to increase FTD, retention, and ARPU.
• Launch and iterate UX/UI experiments based on data and A/B testing results.
• Apply best practices from iGaming and crypto industries to improve product performance.
• Leverage game design principles to enhance emotional engagement and user retention.

• Own, develop, and scale the design system to support fast product growth.

   

👥 Team Leadership

• Build and manage a team of designers (UX, UI, Motion, Visual), including both in-house and contractors.
• Mentor team members and elevate overall design quality and thinking.
• Establish efficient design processes: reviews, standards, workflows, and rituals.
• Foster a strong design culture focused on ownership, quality, and continuous improvement.

💡 Requirements

• 5+ years of experience in design within iGaming, crypto, or other high-conversion digital products.
• 2+ years in a Lead or Head of Design role with responsibility for business impact and team development.
• Proven experience delivering products end-to-end — from concept (0 to 1) to scaling.
• Deep understanding of UX principles specific to iGaming or crypto products.
• Strong knowledge of game design mechanics and emotional engagement strategies.

• Ability to analyze A/B test results and measure the impact of design decisions (CR, Retention, LTV).

   

🎁 What We Offer

• 💰 Competitive compensation.
• ⚡ Challenging and high-impact tasks that drive professional growth.
• 💼 Strong senior-level team and collaborative environment.
• 🚀 Fast decision-making and minimal bureaucracy.
• 🏡 Remote-first setup — work from anywhere or visit the office.
• 🎓 Investment in learning: courses, certifications, and internal knowledge sharing.
• 🍻 Healthy work-life balance: no overtime, no micromanagement.
• 💻 Modern equipment: MacBook, Starlink, PowerBank.
• 👶 Bonuses for maternity leave and childbirth.
• 🔔 Additional internal perks and benefits.

Are you a Data Scientist with a love of LLMs, generative AI?

We are looking for a passionate Data Scientist to implement AI solutions aimed at achieving business goals.

This role offers the opportunity to work on cutting-edge AI adoption projects that helps to improve current business processes.

You'll be a great fit if you have:
- Strong Python Experience (1 year +);
- Experience with LLM , Diffusion models (1 year +);
- Knowledge of Prompt engineering;
- Experience with Gen AI-related technologies such as LangChain and RAG;
- Experience with Neural Networks (Optional) ;
- Experience with NLP , Predictive analytics and Machine learning;
- Experience with Pandas;
- Experience with SQL, including experience with large datasets;
- Strong experience in statistics;

What you'll do:
- Develop AI agents that utilize LLM, RAG and langchain approach;
- Implement LLM and Diffusion models to boost business productivity;
- Utilize LLM (LLM Vision) to improve object detection, text classification and extraction;
- Create forecasting, recommendation, and classification models;
- Transform business challenges to AI applications;

We ensure your growth with:

- Great networking opportunities with international clients, challenging tasks;

- Building interesting projects from scratch using new technologies;

- Personal and professional development opportunities;

- Competitive salary nominated in USD;

- Paid vacation and sick leaves;

- Flexible work schedule;

- Friendly working environment with minimal hierarchy;

- Team building activities, corporate events.

​The company is a leader in the Search Arbitrage market with over 20 years of experience in traffic. Unlimited budgets, a large creative team, automation of fillings and campaign management, an internal development team. Our goal is to make the media buying process as comfortable as possible and free buyers from constant checking of their advertising campaigns.
Right now we are looking for a buyer - an expert in TikTok Search. We value your experience and are ready to pay for it.

Why you'll love us:
- ​Infrastructure & Tech: Own development, autofills, unlimited budgets and agency accounts.
​- Creative Power: You have a personal Creative Producer assigned to you. He is your bridge to the creative department, who generates and implements your ideas every day.
- ​No Micro-management: We value expertise. Team Lead is support and analytics, not control of every click.
​- Scale: The opportunity to quickly grow to Team Lead.

​Your challenges:
- ​Scaling and optimizing RC in TikTok Search.
-​ Searching and testing new offers/approaches (we provide resources - you provide results).
-​ Maximizing ROI/Profit and working with reporting.

​Our ideal candidate:
- ​Has 1+ year of experience with TikTok (Search/RSOC - 6+ months required).
​- Confidently manages 20+ accounts simultaneously.
​- Understands how to maintain high ROI on large volumes.
​Leadership experience or creative skills would be a plus.

We offer:

- 20 working days of vacation (not calendar days);

- Additional paid leave for family events;

- 10 days of sick leave with medical certificate + 3 Sick days without MC;

- Professional courses;

- Remote/Hybrid/Office formats;

- Flexible start time between 8:00 and 10:00;

- Modern offices in Prague&Warsaw;

- Top equipment;

- Paid tools and programs;

- Participation in professional conferences fully-paid by the company.

You get:

- Rate + % of profit (discussed individually)

We are waiting for your feedback)

Attention! The company has a referral program - you can recommend a candidate for a bonus of up to $500 🙌