Jobs at Djinni

We are looking for a detail-oriented Risk & Payment Specialist who will help ensure secure payment operations, identify fraudulent activity, and support a safe and reliable player experience across our products.

If you have a strong analytical mindset, enjoy investigating unusual patterns, and are passionate about risk prevention and payment security, we would love to meet you.
 

Requirements:

• 3+ months of experience in Risk, Payments, Fraud Prevention, KYC, Compliance, Customer Support, or a related field.
• Experience with document verification and payment processing.
• Previous experience in the iGaming industry will be considered a strong advantage.
• Experience working with SoftSwiss products is a plus.
• Strong attention to detail and ability to identify suspicious patterns.
• Analytical mindset and confidence in making decisions based on available information.
• High level of responsibility, accuracy, and perseverance.
• Ability to work efficiently with large volumes of data and cases.
• English level — Pre-Intermediate (A2+) or higher.

Responsibilities:

• Monitor and analyze suspicious customer activity and potentially fraudulent behavior.
• Review payment transactions and identify payment-related risks and anomalies.
• Investigate fraud cases, Terms & Conditions violations, and unusual user activity patterns.
• Verify customer documents and perform KYC checks in accordance with internal procedures.
• Analyze large winnings, withdrawals, and payment activities to identify potentially risky behavior.
• Collaborate with Payments, Support, Retention, and other internal teams to strengthen fraud prevention processes.
• Escalate high-risk cases and provide recommendations for further actions.
• Maintain accurate reports and documentation related to risk management and payment operations.
• Support the continuous improvement of internal payment and risk control processes.
   

Benefits

• Freedom to choose where to work: work from anywhere in the world with the freedom of remote options.
• Flexibility: enjoy flexible working hours that let you balance your personal and professional life while staying focused on delivering great results.
• Corporate English speaking club: improve your English proficiency with regular practice and expert guidance.
• A Culture That Cares: thrive in a friendly environment where a strong corporate culture builds connections, drives innovation, and makes you feel truly valued.
• Comfort Fuels Success: experience comfortable conditions that inspire productivity and foster professional growth, giving you the tools and space to excel.
• Accelerate Your Growth: seize career advancement opportunities in a rapidly expanding marketing company. As the company scales, so will your professional journey.

Location: Remote European time zone (CET/EET)
Reports to: CMO

Level: Senior / Lead

About WOWCube

WOWCube is a hybrid gaming console built as a modular cube with 24 screens and motion sensors. It combines hardware, embedded software, its own operating system, and a set of system apps that shape the core user experience.

About the Role

We’re looking for a Product Manager to own the WOWCube website and e-commerce experience as a product.

This role focuses on building high-conversion pages, improving the customer journey, and driving results through data, experimentation, and A/B testing. Success is measured by conversion, funnel performance, and execution quality.

You’ll work closely with design, engineering, and growth teams, owning the roadmap and delivery for all web and e-commerce surfaces.

Responsibilities

1. WOWCube (E-commerce & CRO):
You own the WOWCube website, landing pages, Shopify, Convert.com, Smartlook and other 3rd party integrations as a product to constantly improve conversion funnel:

• Define structure, content, and user flows for the main website and landing pages.
• Own how pages load, how users move through them, and how conversion happens.
• Work closely with design, copy, and development to ship high-quality pages.
• Write clear product requirements for web development and CRO improvements.
• Ensure pages are fast, clear, and conversion-focused.

2. Customer Journey and Conversion Logic

You are responsible for understanding and improving the full customer journey:

• Map CJM from first visit to purchase and post-purchase steps.
• Identify drop-off points and friction across the funnel.
• Translate user behavior into clear hypotheses and page improvements.
• Make decisions based on data, not opinions.
   

3. E-Commerce Product Ownership

This role has a strong e-commerce focus:

• Own product pages, checkout flows, and purchase experience.
• Work on pricing presentation, bundles, promos, and upsell logic.
• Partner with growth and marketing to support campaigns and launches.
• Ensure stable, predictable purchase flows across devices and regions.

4. Experiments, A/B Testing, and Iteration

You lead experimentation as a core product practice:

• Define and run A/B tests across pages and funnels.
• Prioritize experiments based on impact and effort.
• Track results and turn learnings into shipped changes.
• Build a repeatable testing and optimization process.

5. Roadmap, Documentation, and Delivery

You own planning and execution for the web product:

• Build and maintain the website and CRO roadmap.
• Write clear specs and documentation for design and engineering.
• Manage delivery from idea → spec → build → launch → iteration.
• Keep work structured, visible, and predictable.

Requirements

Must-have

• Strong experience as a product manager working on websites and landing pages.
• Proven background in e-commerce products and conversion funnels.
• Deep understanding of customer journey mapping (CJM).
• Hands-on experience with A/B testing and experiment design.
• Strong system thinking: ability to see the funnel as one connected product.
• Ability to turn data into clear product decisions.
• Solid portfolio with real examples of high-conversion pages or funnels.
• Experience working closely with designers, developers, and marketers.

Soft skills

• Structured, analytical mindset.
• Clear communication and decision-making.
• High attention to detail.
• Ownership mentality and consistent execution.

Preferably 

• Experience with Shopify or similar e-commerce platforms.
• Background in CRO, growth, or performance marketing teams.
• Experience working with analytics tools (GA, BigQuery, Amplitude, PowerBI, etc ).
• Consumer electronics start-up scaling.

We are looking for a Senior Ruby on Rails Developer to join a fast-growing product company developing an innovative digital healthcare platform. 
Project: US-based telehealth platform, focused on improving access to medical cannabis. The platform connects patients with licensed healthcare providers through virtual consultations, helping them obtain medical marijuana cards quickly and easily, along with personalized treatment plans based on individual health needs. You'll work on a modern SaaS product that helps improve access to healthcare services through secure, scalable, and user-friendly technology.

As part of a collaborative engineering team, you'll contribute to building new features, improving system performance, integrating third-party services, and scaling a cloud-based platform used by thousands of users.

Tech Stack: Ruby on Rails 7, Puma, Sidekiq, Redis, Sorcery Authentication, MySQL / PostgreSQL, RSpec.

Infrastructure & DevOps: AWS, AWS CDK, GitHub Actions, CI/CD.

Integrations: Stripe, Chargebee, NMI, Twilio, Zoom, Intercom, HubSpot, PostHog, Rollbar, AWS CloudWatch.

Requirements:

• 5+ years of commercial experience with Ruby on Rails.
• Strong experience with Ruby on Rails 7.
• Experience with Redis, Sidekiq, and background job processing.
• Solid knowledge of MySQL and/or PostgreSQL.
• Experience writing automated tests using RSpec.
• Experience building and consuming RESTful APIs.
• Familiarity with cloud environments, preferably AWS.
• Experience with CI/CD pipelines.
• Strong understanding of software architecture and best engineering practices.

Nice to Have:

• Experience with TypeScript.
• Experience with React.
• Experience with AWS Lambda.
• Knowledge of payment systems and billing integrations.
• Experience working with SaaS or Healthcare products.

We Offer:

• Remote work and flexible working hours.
• Legal support.
• Paid sick leaves.
• Paid vacations.
• Medical insurance. 
• Free English classes.

Position name: Senior React Native developer
Level: Senior Only
Hard skills requirements (including years):

• A minimum of 6 years developing React Native applications.
• Experience with Expo, Expo Router, Tamagui UI Toolkit, Zustand/Tanstack Query for state management

Soft skills requirements:

• Ability to work independently and collaboratively in a team environment.
• Excellent problem-solving skills and attention to detail.

Office/Remote: Remote
Project tasks:

• Pixel-perfect replication: Replicate the Lovable mobile site exactly. Every hex code, shadow, and frosted-glass effect must match the high-end web design 1:1. We do not compromise on design quality.
• AI-Streamlined Porting: Leverage Claude/LLMs to "convert" our React web logic and Supabase calls into high-performance React Native code to maintain startup speed.
• High-end Performance : Implement a vertical video feed using FlashList and the New Architecture to ensure 60-120fps scrolling with zero "jank."

English level: Upper

We are looking for a strong Senior Business Analyst / System Analyst who can structure complex business processes, translate operational and product needs into clear requirements for the development team, and act as a key link between business, product, and engineering.

This role is for someone who can deeply understand processes, identify dependencies between system modules, quickly navigate complex scenarios, and turn them into a logical, clear, and implementable structure.

Product: a ticketing / event-tech platform for the European market within the e-commerce domain, with multiple integrations, operational scenarios, automations, and AI-driven processes.

Requirements

• 5+ years of experience in IT as a Business Analyst / System Analyst / Product Owner
• Experience with complex systems, multi-module products, or enterprise solutions
• Experience with e-commerce products, marketplaces, transactional platforms, or products with multiple user and operational scenarios
• Understanding of e-commerce processes: user journey, checkout, orders, payments, refunds, availability / inventory, notifications, customer support flows
• Experience analyzing and documenting interactions between modules, services, APIs, and external integrations
• Understanding of SDLC and Agile / Scrum / Kanban principles
• Ability to quickly structure large volumes of unstructured information
• Experience documenting business processes, user flows, use cases, system logic, and interaction scenarios
• Experience creating documentation: BRD, SRS, User Stories, Use Cases, BPMN, workflow diagrams
• Ability to translate business requests into clear development tasks
• Experience with Confluence, Jira, Miro, Draw.io, Figma, or similar tools
• Experience with AI tools or AI-driven processes for analysis, information structuring, documentation automation, or workflow optimization
• Systems thinking, strong self-organization, ownership, and communication skills

Nice to Have

• Experience in ticketing / event-tech / event management / entertainment / booking systems
• Experience with products for the European market
• Experience in fintech, SaaS, or enterprise products
• Experience as an Operational BA or Enterprise Systems Analyst
• Experience launching new products, modules, or internal transformation projects
• Experience with high-load operational products or systems with a large number of transactions and integrations
• Understanding of payment flows, fraud checks, invoices, reporting, or customer support automation
• Hands-on experience with LLM tools, chatbots, scoring systems, or internal AI tools

Responsibilities

• Analyze, structure, and document business requirements and processes
• Identify weak points in current processes and suggest improvements
• Prepare technical specifications, user stories, workflow diagrams, BPMN, and other project documentation
• Describe system logic, module interactions, services, and integrations
• Decompose complex business tasks into clear stages for the development team
• Collaborate with product, operations, and engineering teams
• Participate in designing new features, modules, automations, and AI-driven solutions
• Maintain and develop the product knowledge base
• Prepare diagrams, mockups, flows, and user scenario descriptions
• Participate in discovery phases for new products and internal transformation projects
• Ensure consistency between business needs and technical implementation

Working Conditions

• Remote work format
• Paid vacation and sick leave
• Minimal bureaucracy and fast decision-making
• Direct collaboration with the product and key decision makers
• Opportunity to influence process architecture and product development
• Result-oriented and growth-focused team
• Competitive salary
• Work in a Ukrainian product company actively scaling in the European market

FINANCIAL OWNER & CONTROLLING

You will responsible for building and owning Clearly’s financial function end-to-end. You will act as a financial partner, ensuring that the company has the structure, visibility, and discipline required to scale sustainably.

This role combines hands-on execution (QuickBooks, reporting) with strategic ownership (forecasting, budgeting, investor reporting, financial setup).

KEY RESPONSIBILITIES
 

Financial Strategy & Planning

• Own and continuously refine the company’s financial planning and forecasting
• Build and maintain revenue forecasts (across geographies, B2C and B2B streams)
• Improve and manage budgeting processes
• Ensure alignment between financial plans and company OKRs
• Provide clear visibility on runway, cash flow, and growth scenarios

Financial Operations & Accounting

• Own and manage QuickBooks for accurate and timely accounting
• Ensure proper bookkeeping, reconciliations, and financial accuracy
• Oversee monthly, quarterly, and annual financial closing processes
• Build scalable financial processes and internal controls

Revenue, Payments & VAT

• Own&Optimize financial flows related to Stripe and other payment providers
• Ensure proper tracking and reconciliation of revenue streams
• Manage VAT compliance across multiple markets (EU focus)
• Work with external partners on tax optimization and compliance

Investor Reporting & Financial Visibility

• Prepare and maintain investor-ready financial reports
• Build clear reporting on: revenue performance, margins and unit economics, cash flow and runway
• Support fundraising processes with financial data and materials

B2B Finance & Contracts

• Support development and scaling of B2B revenue streams
• Ensure proper financial setup for: contracts, invoicing, revenue recognition
• Partner with sales and operations on pricing and deal structure

Financial Setup, Legal & Banking

• Own and optimize banking infrastructure
• Support legal and financial setup across entities and markets
• Ensure compliance with local regulations and reporting requirements

REQUIREMENTS

• 4+ years in Finance, Accounting, or FP&A roles (startup or scale-up preferred)
• Strong experience with QuickBooks (or similar accounting tools)
• Experience with budgeting, forecasting, and financial planning
• Experience managing VAT and multi-country financial operations (EU)
• Experience working with Stripe or similar payment systems
• Experience preparing investor reports and financial dashboards
• Exposure to B2B and/or marketplace businesses is a strong plus

Analytics & Thinking

• Strong understanding of:
  • P&L, cash flow, and balance sheets
  • revenue recognition
  • unit economics
• Ability to build financial models and forecasts
• Strong attention to detail with structured thinking
• Ability to turn numbers into actionable insights

Mindset & Execution

• High ownership and accountability (“finance owner” mindset)
• Hands-on approach (ready to both build and execute)
• Comfortable working in building from scratch
• Strong communication skills (able to explain finance to non-finance stakeholders)
• Focus on impact, not just reporting

Language

• English: C1+
• Spanish is a strong plus

WHAT WE OFFER

• Direct work with COO and fast decision-making cycles
• High-impact role with real ownership
• Remote-first setup with flexibility
• Professional development: Budget for courses, conferences, and learning tools
• Wellbeing: 50% discount on psychotherapy sessions through the Clearly/Rozmova platform
• Team: Budget for team buildings and collaboration tools
• Growth opportunities: We are very flexible on the roles, titles, responsibilities, and can adjust them quarterly/monthly, based on business needs and your preferences.

About Digis
Digis is a European IT company with 200+ specialists delivering custom software development and staff augmentation services to clients in the US, UK, and EU.
We build long-term partnerships and focus on transparency, trust, and measurable business results.

About the Project
This role is part of Digis’ internal sales & lead generation department.
The team works with LinkedIn and email outreach to generate qualified leads for IT outsourcing and staff augmentation services.

The processes are mature, well-documented, and currently scaling. You will work closely with the Head of Sales and Lead Generation team, directly influencing the company’s sales pipeline.

Key Tools & Technologies

• LinkedIn Outreach
• Email Outreach (Gmail-based tools)
• Google Sheets / Google Docs
• AI tools for writing support: ChatGPT, Grammarly
• Lead verification & data tools: Apollo, Zerobounce, etc.

Requirements

• 1+ year of experience in Lead Generation / Outreach (outsourcing/outstaffing companies)
• Hands-on experience with LinkedIn and email outreach
• Ability to write manual, personalized outreach messages
• Familiarity with ChatGPT / Grammarly as writing assistants
• Clear understanding of the staff augmentation model
• Strong analytical thinking and attention to detail
• Upper-Intermediate+ English

Responsibilities

• Build ICP-based company lists
• Find and verify contact data (emails, LinkedIn profiles) of decision-makers
• Write personalized outreach messages (email + LinkedIn)
• Log and maintain data in tracking sheets / CRM
• Continuously improve outreach quality and conversion rates
• Collaborate closely with the Head of Sales and Lead Gen team

We Offer

• 20 paid vacation days per year
• 5 paid sick leaves per year (no medical documents required)
• Personalized development plan with training compensation
• English courses compensation
• Work equipment if needed (PC / laptop / monitor)
• Flat and transparent internal communication
• Opportunity to switch between projects and technologies within Digis
• Full accounting and legal support

On behalf of our Client from France, Mobilunity is looking for a Backend Engineer – NestJS.

Our client is a table management software and CRM that enables restaurant owners to welcome their customers easily. The app is useful to manage booking requests and register new bookings. You can view all your bookings, day after day, wherever you are and optimize your restaurant’s occupation rate. Our client offers a commission-free booking solution that guarantees freedom above all. New technologies thus become the restaurateurs best allies for saving time and gaining customers while ensuring a direct relationship with them.

Their goal is to become the #1 growth platform for Restaurants. They believe that restaurants have become lifestyle brands, and with forward-thinking digital products, restauranteurs will create the same perfect experience online as they already do offline, resulting in a more valuable, loyalty-led business.

Requirements:

• 5+ years building backend applications with NestJS
• Strong product ownership with experience taking features from concept to production
• Experience designing scalable REST APIs and backend services
• Comfortable working with legacy codebases and improving existing systems
• Working knowledge of React
• Experience with AWS

• Active daily use of AI development tools (Claude Code, Cursor, Copilot)

   

In return we offer:

• 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
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!

Senior Full Stack Engineer

We’re building the Production ready system from the PoC and looking for a Senior Full Stack Engineer who enjoys creating scalable products and taking ownership of real technical decisions. You’ll work closely with product and design teams, shape parts of the architecture, and help turn ideas into a production-ready platform.

Requirements:

• 5+ years of software development experience with JavaScript, TypeScript, and modern ES6+
• Strong experience with React and Next.js
• Strong experience with backend development using Node.js / NestJS
• Hands-on experience with MongoDB and PostgreSQL
• Hands-on experience with MQTT
• Experience building applications that can be deployed on both OnPrem and Cloud platforms
• Experience building scalable applications and contributing to system architecture
• Ability to take ownership of features and technical solutions
• Comfortable working in fast-paced, product-driven environments
• Strong communication skills and ability to collaborate with both technical and non-technical stakeholders
• Upper-Intermediate English (B2+)

Nice to Have:

• Experience with React Native or WebSockets
• Experience working in startup or early-stage environments
• Experience with Azure, IoT Hub, Microsoft Entra ID
• Previous experience mentoring engineers or contributing to technical leadership

Responsibilities:

• Develop and deliver key features of a new product from concept to launch
• Contribute to the design and implementation of scalable frontend and backend architecture
• Collaborate closely with product, design, and engineering teams
• Take ownership of technical solutions and help drive implementation
• Participate in code reviews and maintain high engineering standards
• Contribute to development best practices and team workflows
• Support and mentor less experienced engineers when needed
• Continuously improve performance, reliability, and scalability of the platform.

PlantIn — продуктова IT-компанія з екосистеми Genesis, що зближує користувачів з їхніми захопленнями шляхом створення продуктів на основі Machine Learning. Наші застосунки об’єднують понад 55 млн людей у всьому світі. 

Переходь на наш сайт, щоб дізнатися більше про компанію.

Наші продукти:

PlantIn — застосунок №1 на ринку США для ідентифікації рослин та допомоги у піклуванні про них. PlantIn дозволяє створювати персоналізовані плани догляду, консультуватися з ботаніками та спілкуватися у глобальній спільноті любителів рослин.

CoinIn — застосунок для ідентифікації та визначення вартості монет та банкнот. Він дає миттєвий доступ до повної інформації про монети й банкноти та поради з догляду за колекцією.

Також компанія активно розвиває напрям R&D для розробки нових застосунків у ніші хобі.

• Працювати над створеннями WEB воронок для залучення користувачів у продукт;
• Генерувати ідеї для проведення АБ тестів з метою покращення прохідності воронок та впливу на LTV;
• Проводити та аналізувати АБ тести, імплементувати успішні варіанти;
• Робити дослідження ринку та конкурентів з метою пошуку нових точок росту;
• Працювати над аналізом ризик метрик на WEB воронках;
• Систематизувати зміни та вести документацію по WEB воронкам.

• Готові розглянути кандидатів без досвіду або з досвідом від 6 місяців;
• Високий рівень володіння англійською мовою (В2+);
• Вміння працювати з Excel/Google docs;
• Навички активного використання ШІ-інструментів у щоденній роботі;
• Аналітичний склад розуму, орієнтація на результат, уважність до деталей та креативність.

• Розуміння базових принципів роботи з WEB воронками;
• Базове вміння користуватися Figma, Amplitude або аналітичними інструментами;
• Базове розуміння HTML/CSS;
• Досвід в маркетингу.

• Розвивай українські ML-based продукти, які вже здобули успіх у світі.
• Занурся в атмосферу карʼєрного росту. У нас можна взяти на себе новий напрям чи протестувати та втілити зміни власноруч.
• Долучайся до like-minded команди з власними традиціями. Наша атмосфера сприяє відкритості та довірі.
• Переконайся, що твої рішення та дії впливають на продукт і компанію – 88% плантінівців це підтверджують.

• Медстрахування, масаж, корпоративний лікар;
• Гнучкий графік роботи: починай робочий день з 9:00 до 11:00;
• 20 робочих днів відпустки, 100% оплата безлімітних лікарняних, 1 оплачений period leave на місяць;
• Система заохочення та визнання Pando: розвивайся та долучайся до життя команди, отримуй за це бали та обмінюй їх на нагороди;
• Безкоштовні сніданки, обіди та снеки у просторому офісі на Подолі; 
• Сучасна техніка для роботи;
• Компенсація спорту, психотерапії та навчання;
• Доступ до профільних спільнот Genesis та внутрішнього навчання. 

Location: Remote/Warsaw, Poland
Format: Full-time
Type of contract: B2B
Seniority: Middle/Senior
English level: C1+

About Us
At EPC Network, we build scalable performance marketing infrastructure focused on the US market. Our environment is fast-paced, operationally intensive, and centered around ownership, adaptability, and measurable business impact.

We are currently launching a new SMS direction and looking for an SSPs Manager who will help scale and maintain our provider infrastructure.

What You’ll Be Doing

• Build and maintain relationships with SMS providers
• Onboard new providers and manage ongoing communication
• Resolve operational issues, disputes, and escalations
• Negotiate pricing, limits, and commercial terms
• Register and maintain US phone numbers across providers
• Coordinate closely with Compliance, Operations, and Marketing teams
• Maintain clear tracking of providers, registrations, and workflows
• Expand overall SMS sending capacity and provider diversification

• 3+ years of experience in partnerships, bizdev, affiliate marketing, telecom, SMS, or related operational environments
• Strong spoken and written English for daily communication with US partners
• Excellent communication and negotiation skills
• Ability to manage multiple workflows and conversations simultaneously
• High level of ownership and self-management
• Structured and organized approach to work
• Comfortable operating in fast-paced and ambiguous environments
• Background in sales, affiliate marketing, bizdev, telecom, or performance marketing is a strong advantage

• Learn the US SMS ecosystem and internal operational workflows
• Take ownership of existing provider relationships
• Source and onboard new providers
• Register new phone numbers across multiple providers
• Build a transparent and scalable operational workflow

• Multinational and intercultural experience
• Corporate library
• A world-class team to work with
• Growth opportunities
• Cutting-edge frameworks and technologies
• Competitive salary
• Plenty of engaging team-building and social events
• Bonuses according to the policy
• 21 paid vacation days & 14 paid sick leaves;
• Cozy office in Warsaw, available for you whenever you need it
• Coffee, tea, Red Bull, sweets, fruits, and more snacks

Interested?

We are looking for a senior C++ engineer to build a high-performance service for streaming large scientific and engineering datasets.

This is not a conventional CRUD backend role. You will work on asynchronous networking, HTTP/3 and QUIC, object-storage range reads, binary data transfer, native library integration, request scheduling, and bounded-memory data pipelines.

What you will do

• Design and implement the data-streaming service in modern C++.
• Build persistent HTTP/3 and QUIC-based client-server communication.
• Stream selected regions of large datasets without downloading complete files.
• Integrate with S3-compatible object storage and native data-processing libraries.
• Implement asynchronous request scheduling, prioritisation, cancellation, retries, caching, and backpressure.
• Design stable binary and JSON interfaces between independently developed components.
• Implement token-based authentication and fine-grained access control.
• Optimise memory allocation, copying, concurrency, and end-to-end throughput.
• Add metrics, tracing, load testing, and failure recovery.
• Collaborate with visualisation, machine-learning, backend, and systems engineers.

What we are looking for

• Strong production experience with modern C++17/20.
• Experience building high-throughput, low-latency, or data-intensive systems.
• Strong understanding of asynchronous and concurrent programming.
• Good knowledge of networking, HTTP, TLS, and binary protocols.
• Experience with streaming I/O, byte-range access, buffering, caching, and memory management.
• Practical knowledge of S3, MinIO, Ceph, or similar object-storage systems.
• Strong debugging, profiling, and performance-optimisation skills.
• Experience designing reliable APIs and component boundaries.
• Familiarity with Linux systems programming and production service operation.

Nice to have

• Experience with HTTP/3, QUIC, WebTransport, or high-performance RPC.
• Experience with zero-copy or low-copy data paths.
• Experience integrating C++ libraries with Python
• Familiarity with CUDA or GPU-oriented data pipelines.
• Background in distributed storage, databases, CDNs, filesystems, media streaming, HPC, or scientific visualisation.
• Experience with OAuth, OIDC, JWT, and capability-based access.
• Knowledge of Kubernetes and OpenTelemetry.

We are a friendly team of passionate professionals committed to delivering reliable software solutions for customers from all around the world and we are currently in need of an experienced Middle QA Engineer to join our team.
What we are missing is you!

Responsibilities

- Perform testing of web applications.
- Perform basic API testing, including validating requests, responses, status codes, headers, and payloads.
- Analyze requirements, designs and BA specifications to identify test scenario.
- Perform API testing (Postman/Swagger) and validate backend data consistency in SQL/PostgreSQL.
- Identify, document, prioritise, and track defects throughout their lifecycle.
- Document test results and test cases, and provide QA status reports.

Requirements

- At least 3 years of commercial experience in software testing.
- Hands-on experience in functional, regression, and exploratory testing.
- Good understanding of SDLC and Agile methodology.
- Basic practical experience with API testing using tools such as Postman.
- SQL knowledge and experience using browser developer tools.
- English Intermediate+.
- Experience in cross-browser and cross-platform testing.
- Ability to work independently with ambiguous or shifting requirements.

We offer:

- Flexible work format - remote, 8-hour working day without time
trackers;
- Competitive salary;
- TIght-knit and friendly team;
- Personalized career growth;
- Up to 50% coverage of the cost of professional courses;
- Vacation time, sick-leaves, national holidays;
- Competitive bonuses for a personal recommendation of new
employees;
- Professional development tools (mentorship program, tech talks and workshops);
- English classes with a teacher;
- Corporate events and team buildings.

Lemberg Solutions is, above all, a group of passionate professionals led by a core team that have been meticulously selected over the last 15 years. We are based in Lviv, Rivne, and Lutsk, and opened a GmbH in Hamburg, Germany.

At LS, people come first. We know that our success is based on our people’s achievements. Each and every one of our 200 team members is highly valued for their hard work, and we’re always excited to welcome new specialists ready to embrace challenges with us.

Pay attention: only those candidates who meet the listed requirements will receive an answer!
 

Necessary skills and qualifications:

• At least 4 years of experience with C++ programming (14.0 and higher)
• 3+ years of experience with embedded Linux
• Good debugging skills 
• Experience with kernel space and user space development
• Strong knowledge of hardware board configuration and usage
• Experience with single-board computers and SOMs, like Raspberry Pi, NXP iMX8, NXP iMX6, STM32MP157
• Hands-on experience with Yocto or Buildroot, etc.
• Practical experience with Linux configuration for hardware interface communication
• Basic electronics principles knowledge
• Knowledge of wired/wireless communication protocols/interfaces
• At least an Upper-Intermediate English level
   

Will be a plus:

• Knowledge of Python
• Experience with Qt
• Ability to take on the role of a lead developer of the project 
• Experience with MCU

What we offer:

Time Off 

• 21 days of paid annual leave 
• Unlimited sick leave with a medical statement 
• 30 working days off for personal reasons without compensation 
• 5 days of additional paid time off following your wedding or your child’s birth
• Paid public holidays

Workplace Benefits

• Free English classes in groups
• Flexible work schedule
• Fully equipped workstation
• Comfortable office
• Access to a video library of soft skill workshops

Financial Benefits

• Relocation support program
• Financial support from LS in case of emergency (reviewed individually)
• Overtime pay
• In-house accounting service

Fun

• Lviv IT Cluster gifts & discounts 
• Team building & industry events