Jobs at Djinni

We are looking for a CRM & Retention Manager to join an iGaming product team.

In this role you will be responsible for building retention strategy, managing player segmentation and launching CRM campaigns to increase LTV and reduce churn.

Responsibilities:
• Own segmentation strategy and the full retention lifecycle
• Build onboarding, upsell, reactivation and churn-prevention journeys
• Design and manage bonus mechanics (reloads, cashback, freespins, missions)
• Execute multi-channel communication: Email, SMS, Push, WhatsApp, onsite pop-ups
• Run A/B tests for content, cadence and bonus strategies
• Analyze retention metrics (LTV, churn, cohort analysis)
• Work closely with Casino Manager, VIP and Marketing teams

Requirements:
• 2+ years of experience in CRM / Retention
• Experience in iGaming or high-risk e-commerce will be a strong advantage
• English level B1+
• Experience with CRM platforms (FastTrack, Optimove, Smartico, Exponea or similar)
• Strong analytical mindset
• Experience working with retention metrics and A/B testing
• Experience running multi-channel CRM campaigns

Nice to have:
• Spanish language
• Previous experience in gambling / iGaming projects

What we offer:
• Remote work format
• Product environment in the iGaming industry
• Experienced international team

We are seeking a Data Scientist with a strong foundation in physics, control theory, and mathematical modeling to join our team working on cutting-edge autonomous systems. The ideal candidate combines analytical rigor with practical experience in modeling, simulation, and algorithm development for autonomous platforms.

Levels: Middle and Senior (responsibilities and scope will be adjusted accordingly).

Key Responsibilities

• Develop and validate mathematical models for autonomous systems and dynamic environments.
• Apply data-driven approaches for system identification, optimization, and predictive control.
• Analyze large datasets from sensors and simulations to extract insights and improve system performance.
• Design and implement algorithms for control, navigation, and decision-making.
• Collaborate with cross-functional teams to integrate models into real-world autonomous platforms.

Required Qualifications

• 3+ years in R&D or applied data science/software development.
• Strong background in mathematical modeling, system identification, and control theory.
• Proficiency in Matlab/Simulink for modeling and simulation.
• Experience in signal processing and data analysis.
• Programming skills in Python and C++.
• Ability to quickly research and apply recent trends in control theory, autonomous systems, and data-driven modeling.
• Relevant work experience or education in STEM field

Nice to Have

• Knowledge of aerodynamics fundamentals.
• Experience with Machine Learning (e.g., reinforcement learning, predictive modeling).
• Familiarity with simulation tools such as Gazebo, AirSim.
• Hands-on experience with SITL/HITL testing.
• Exposure to flight control stacks like PX4, Betaflight, ArduPilot.

About Us:
Difmark is a P2P platform where users can buy or sell digital goods (game keys, gift cards, top-up cards, software), game accounts, currency (MMO), additional services, and other gaming products without additional fees and intermediaries that are usually involved in such transactions.

The Purpose for the Role:
The Quality Assurance Engineer will ensure the delivery of high-quality, reliable software for Difmark's platform.The role involves testing new features, identifying bugs, and ensuring that the platform provides seamless functionality and a superior user experience.

Probation Period:
The probation period is 3 months, during which the candidate's technical skills, adaptability to the team, and contribution to product quality will be assessed.

Key Tasks and Role:

• Develop and execute test plans, test cases to identify software issues.
• Conduct manual testing of web application.
• Work closely with developers, designers, and project manager to understand requirements and identify potential risks.
• Document and track issues using bug tracking tools, ensuring timely resolution.
• Participate in Agile/Scrum meetings to provide QA insights and updates.
• Perform regression testing to ensure platform stability after updates.
• Continuously improve QA processes and contribute to best practices for software quality.

Requirements:

At least 1.5 years of commercial experience as QA for web-based application.
Solid understanding of testing processes, software development life cycle, and bug tracking.
Proficiency with web testing tools: Chrome DevTools, Postman (or similar).
Knowledge of basic client-server architecture and HTTP(S) protocol.
Experience testing responsive interfaces (desktop, mobile, tablet).
Ability to identify UI/UX issues and describe them effectively.
Experience with bug tracking tools like JIRA.
Basic knowledge of HTML, CSS, JavaScript
Experience with databases (basic SQL query execution)

Soft Skills:
Strong attention to detail and analytical thinking.
Excellent communication and collaboration skills.
Ability to work in a fast-paced, dynamic environment.

Nice to Have:
Experience in the e-commerce industry.
Familiarity with continuous integration and deployment (CI/CD) pipelines.
ISTQB certification or equivalent.

Our recruitment process typically follows these stages:

1. Application screening
2. Interview Stages:
   • Prescreening call (30 min)
   • Technical Interview (60 min)
   • Job Offer
3. Referrals: Employment and Background Check

Our Customer:

A global technology company developing real-time video augmentation and rendering infrastructure for broadcast and streaming environments.
 

Responsibilities:

• Design and implement a native video playback extension that augments HLS streams at runtime across platforms such as Android (ExoPlayer), webOS, Roku, and others;
• Build and maintain a cross-platform rendering layer using OpenGL for real-time video frame processing and compositing;
• Integrate GPU-based overlays and visual transformations directly into the playback pipeline with strict frame-accurate synchronization;
• Develop device-aware architecture to handle platform-specific decoding, rendering surfaces, hardware acceleration constraints, and performance tuning;
• Integrate external SDKs and APIs alongside an internal AR/graphics processing pipeline;
• Optimize rendering performance, memory usage, and latency under real-time streaming constraints;
• Collaborate with QA and Product teams to validate rendering accuracy, synchronization precision, and cross-device stability.
   

Required experience and skills:

• Strong experience with Kotlin;
• Strong hands-on experience with OpenGL (mandatory, core skill), including shader programming and GPU pipeline understanding;
• Solid knowledge of real-time rendering concepts (frame buffers, textures, shaders, synchronization, GPU/CPU interaction);
• Experience integrating OpenGL with native video playback surfaces;
• Practical experience with HLS streaming internals and playback customization;
• Strong understanding of video decoding/rendering pipelines and frame timing control;
• Experience with native video players on at least one of the following platforms: Android (ExoPlayer), webOS, RokuTV;
• Experience implementing low-latency video overlays and graphical composition;
• Understanding of hardware acceleration and performance optimization on embedded/TV devices;
• Proven background in full-cycle software engineering (integration, profiling, debugging, optimization);
• English — Upper-Intermediate+.
   

Working conditions

5-day working week, 8-hour working day;

All UA public holidays are days off;

Vacation and sick leave are covered by the company;

Remote work.

Our Customer:

Our client is a fast-growing cybersecurity technology company developing a large-scale platform for simulating cyberattacks and assessing security posture. The product includes complex web interfaces, high-load backend services, and cloud-native components.
 

Your Tasks:

• Design, develop, and maintain advanced frontend features using React and modern JavaScript (ES6+).
• Build complex UI components, interactive dashboards, and scalable, reusable component libraries (including Storybook).
• Own and evolve the frontend architecture, ensuring high performance, maintainability, and a consistent user experience across the platform.
• Optimize rendering behavior and application performance, minimizing unnecessary re-renders and improving perceived UI responsiveness.
• Collaborate closely with product managers, designers, and backend engineers to deliver high-quality features end to end.
• Participate in technical discussions, frontend architecture decisions, and code reviews.
• Integrate frontend applications with backend APIs (Node.js-based services).
• Work with Git-based workflows and CI/CD pipelines to ensure smooth delivery and deployment.
• Ensure clean, testable, and well-documented code following frontend best practices.
   

Required Experience & Skills:

• 5+ years of professional experience in frontend or web development.
• Senior-level expertise in React and the modern frontend ecosystem.
• Excellent command of JavaScript, with a deep understanding of how the language works (execution context, async behavior, data handling).
• Strong experience designing and maintaining reusable UI components and design systems (Storybook or similar).
• Solid understanding of frontend application architecture, state management strategies, and data flow patterns.
• Experience optimizing React applications for performance and scalability.
• Working knowledge of backend integration (REST APIs, Node.js services).
• Experience working with relational and/or NoSQL databases (e.g., PostgreSQL, MongoDB) at an integration level.
• Familiarity with CI/CD pipelines and modern development workflows.
• Strong focus on code quality, testing, and maintainability.
• English — Upper-Intermediate+ (written and spoken).
   

Working conditions

5-day working week, 8-hour working day;

All UA public holidays are days off;

Vacation and sick leave are covered by the company;

Remote work.

We are looking for a motivated Sales Development Representative to join a B2B sales team working with international markets. This is a junior-to-mid level role that offers hands-on experience in global B2B sales, real responsibility, and clear impact on business growth. The position is well suited for early-career professionals with a strong interest in sales, startups, and business development.

Who This Role Is For

• 2+ years of experience as an SDR in a B2B sales environment
• Strong interest in sales, business, and startup ecosystems
• Native or near-native English proficiency (written and spoken)
• Ability to create clear, persuasive outbound messages
• Highly organized, self-motivated, and comfortable working with KPIs
• Strong communication and stakeholder management skills

Role Details

• Full-time position
• Fast-paced startup-style environment with ownership and accountability
• Direct exposure to international customers and global markets

Nice to Have

• Experience selling B2B SaaS or technology products
• Familiarity with CRM systems and outbound sales tools
• Educational background in Business, Economics, or a related field

📍 Location: Remote

🕐 Schedule: Full-time, Sunday to Thursday

🌍 Company: A fast-growing affiliate marketing network connecting advertisers with high-quality leads

We’re looking for a detail-oriented and reliable Billing and Payment Collection Specialist to join our finance team. This is a great opportunity for someone who wants to grow in a remote-friendly, performance-driven environment.

🔧 Responsibilities:

• Assist in managing billing operations, ensuring accurate billing calculations and on-time payments from affiliates and advertisers;
• Maintain and update billing records using Google Sheets;
• Coordinate with advertiser managers and finance teams to capture all costs and revenues accurately;
• Work closely with the sales and finance teams to ensure accurate cost and revenue tracking;
• Handle client billing inquiries (affiliates and advertisers);
• Support in preparing financial reports and analysis;
• Contribute to improving billing workflows and overall team efficiency.

✅ Requirements:

• Experience in finance, billing, accounting, or related roles;
• Strong knowledge of Google Sheets;
• Excellent attention to detail and organization;
• English level: B1 or higher;
• Self-starter with the ability to stay organized and deliver results remotely.

We are looking for PHP (Laravel) developers to join a team working on the maintenance and modernization of an existing care-management platform.

The current system is built with PHP, and the next phase focuses on modernizing the architecture and gradually migrating the platform to Laravel.

The team will work on both maintaining the existing solution and actively contributing to the redevelopment effort.

Responsibilities

• Maintain and enhance the existing PHP-based platform
• Participate in the architectural redesign and migration to Laravel
• Implement new features and improve system stability
• Refactor legacy code and contribute to modernization initiatives
• Collaborate with the internal team (Project Manager and Architect)
• Communicate with stakeholders in English

Requirements

• Strong experience with PHP
• Solid knowledge of Laravel
• Experience with maintenance, refactoring, or modernization of existing systems
• Ability to work effectively in a distributed team
• English B2+ for daily communication

Our team provides quality assurance for mobile games developed by the company. We work closely with game designers, developers, and product stakeholders to ensure high quality, stability, and an engaging player experience across different mobile devices and operating system versions.

We continuously improve our QA processes step by step, focusing on efficient testing practices and product quality.

We are looking for a strong junior Manual QA team member who can perform manual testing of mobile games across different devices and operating system versions.

We work remotely, with formal meetings kept to a minimum — one weekly stand-up, and the rest scheduled based on work needs.

Our focus is on maintaining a balance between game quality and business goals to ensure long-term project sustainability and a positive team atmosphere.

We strive to deliver games that we can truly be proud of :)

Requirements

• 1+ year of experience in Manual QA (experience in iGaming / slot games will be a strong advantage);
• Technical education background (required);
• Experience testing mobile applications or games (real devices/emulators);
• Understanding of slot game mechanics (reels, paylines, bonus features, payouts) or experience testing casino products;
• Good analytical and debugging skills, ability to investigate and clearly describe issues;
• Familiarity with Agile development processes;
• Experience working with Jira, TestRail, Confluence, and Postman;
• Basic knowledge of Unix / command line;
• Understanding of CI/CD processes (nice to have);
• Basic knowledge of Docker/containerization is a plus;

• English — Intermediate or higher;

   

Responsibilities

• Communicate with product owners and developers to ensure alignment with project goals;
• Participate in product development activities from early stages, providing QA feedback;
• Identify, document, and track bugs throughout the development process;
• Develop and maintain test cases, checklists, and bug reports;
• Test the product across different mobile devices and operating system versions;
• Collaborate effectively within the team, maintaining a proactive and results-driven approach;
• Ensure accuracy, responsibility, and attention to detail in all testing activities.

Benefits

Why Join Us?

🎰 Be part of the international iGaming industry – Work with a top European solution provider and shape the future of online gaming;

💕 A Collaborative Culture – Join a supportive and understanding team;

💰 Competitive salary and bonus system – Enjoy additional rewards on top of your base salary;

📆 Unlimited vacation & sick leave – Because we prioritize your well-being;

📈 Professional Development – Access a dedicated budget for self-development and learning;

🏥 Healthcare coverage – Available for employees in Ukraine and compensation across the EU;

🫂 Mental health support – Free consultations with a corporate psychologist;

🇬🇧 Language learning support – We cover the cost of foreign language courses;

🎁 Celebrating Your Milestones – Special gifts for life’s important moments;

⏳ Flexible working hours – Start your day anytime between 9:00-11:00 AM;

🏢 Flexible Work Arrangements – Choose between remote, office, or hybrid work;

🖥 Modern Tech Setup – Get the tools you need to perform at your best;

🚚 Relocation support – Assistance provided if you move to one of our hubs.

Billease is seeking a Deputy Chief Technology Officer (Deputy CTO) who will serve as a senior technical authority and a trusted partner to the CTO. This role requires deep hands-on expertise, a strong theoretical foundation, and proven experience designing, building, and operating complex systems within a fintech environment.

The Deputy CTO will independently drive architectural decisions, ensure platform stability, security, and scalability, and effectively bridge engineering execution with business and regulatory requirements. 

Architecture & Technical Leadership

• Design, evolve, and govern scalable, secure, and highly available architectures.
• Strong experience with microservices, event-driven systems, and modular monoliths, with clear trade-off analysis.
• Deep grounding in design patterns, SOLID principles, and Clean Architecture.
• Lead architecture and code reviews, technical due diligence, and major design decisions.
• Own and maintain architecture documentation (C4, ADRs, diagrams).

Platform, Cloud & Infrastructure

• Hands-on leadership of production Kubernetes environments (EKS/GKE).
• Strong knowledge of Helm, ingress controllers, autoscaling (HPA/VPA), and zero-downtime deployment strategies (blue-green, canary, rolling).
• Deep experience with AWS (VPC, EC2, EKS, RDS, S3, Route53, Load Balancers) and working knowledge of GCP (GKE, Pub/Sub, Cloud SQL).
• Design secure, highly available, cost-efficient multi-AZ cloud architectures.
• Strong understanding of IAM, backups, disaster recovery, and cost governance.

Security & Reliability

• Strong information security mindset aligned with financial-grade standards.
• Experience with encryption (in transit/at rest), key management, secrets storage, VPNs, and secure networking.
• Solid networking fundamentals: TCP/IP, routing, firewalls, DNS, and load balancing.
• Ownership of observability and reliability practices using Prometheus, Grafana, Victoria Metrics, logs, metrics, traces, alerts, and SLOs.

Backend, Data & Messaging

• Strong hands-on experience with Python (FastAPI/Flask/Django) and Golang for high-performance services.
• Deep understanding of Linux and Docker (multi-stage builds, runtime security).
• Experience with messaging and streaming platforms (Kafka, RabbitMQ), including retries, DLQs, and delivery semantics.
• Strong database expertise: PostgreSQL, MySQL, ClickHouse, SQL optimization, and familiarity with NoSQL systems.
• Experience with logging/search stacks (ELK).
• Solid understanding of data warehousing and pipelines (Redshift, Airflow, ETL/ELT, data quality).

Fintech, Payments & Domain Knowledge (Mandatory)

• Proven experience working in a fintech company.
• Strong understanding of regulatory and compliance constraints, risk management, and security requirements.
• Hands-on knowledge of card payment systems (authorization, clearing, settlement), PCI-DSS, payment gateways, and 3-D Secure.
• Understanding of end-to-end transaction flows, reconciliation, and financial reporting.
• Experience supporting collections systems or workflows is a strong advantage.

Mobile & Integrations

• Ability to review and guide high-scale mobile applications (Android: Kotlin/Java, iOS: Swift).
• Experience collaborating with mobile teams on API design, security, performance, and release coordination.
• Strong experience designing and debugging integrations using standard internet protocols (HTTPS, SMTP, SFTP).

Leadership & Ways of Working

• Proven experience leading senior engineering teams and acting as a technical authority.
• Ability to mentor engineers, provide structured feedback, and drive execution.
• Experience hiring and onboarding senior engineers is a plus.
• Strong Agile and delivery management skills (Scrum/Kanban), including backlog prioritization, release planning, risk management, and stakeholder communication.
• Strong Git and CI/CD practices.

We are looking for a Sales / Business Development Manager focused on new business development and account expansion within the digital / marketing services domain.

The role requires a proactive hunter mindset, strong B2B sales experience, and the ability to align client commitments with actual delivery capabilities.

Key Responsibilities

• Drive new business acquisition through outbound and lead generation activities
• Conduct first communication, qualification, and pitching
• Work with cold leads and build a sustainable pipeline
• Identify client pain points and convert them into closed deals
• Ensure alignment between client expectations and delivery capabilities
• Maintain high CRM discipline: forecasting, documentation, reporting
• Collaborate closely with internal delivery teams
   

Requirements

• 2+ years of experience in B2B sales
• Experience working in digital / marketing agencies (Digital services, IT products for B2B)
• Proven experience working in an International  environment (B2+ level or higher)
• Strong lead generation and cold outreach experience
• Negotiation skills
• Strong understanding of delivery capabilities and technical feasibility
• Experience working with CRM systems
   

Nice to Have

• High-ticket sales experience (retainers, long-term contracts)
• Deal closing ownership
• German language
• Continuous professional development and training participation
   

Interview Process

• Recruiter screen (30–45 min)
• Interview with Hiring Manager (30 min)
• CASE Interview (~60 min)
• Reference check
• Offer call

What you’ll do

• Plan and execute test cycles for Android POS app versions: smoke, regression, and exploratory
• Verify releases end-to-end: changelog validation, build sanity, OTA/update flows, and final sign-off
• Perform ticket verification: reproduce, validate fixes, and close with clear evidence and test notes
• Test on physical POS devices (e.g., K6-class terminals): peripherals (printers, scanners, card readers), EMV/NFC, receipts
• Validate critical POS user flows: checkout, refunds/voids, settlements, offline/poor-network scenarios
• Manage device/OS matrix: Android versions, form factors, firmware, and compatibility impacts
• Design, author, and maintain high-quality test cases and edge-case scenarios for core flows
• Design and execute API tests for POS-related backend services: validate request/response payloads, error handling, and contracts that support mobile flows
• Capture diagnostics for defects: logs, screenshots, videos, ADB traces; provide precise repro steps
• Collaborate with engineering/product to define acceptance criteria and improve testability
• Track quality signals and risks; prioritize test coverage based on impact and usage

What you’ll bring

• Strong POS domain expertise: payments flows, EMV/contactless, peripherals, and store operations
• Hands-on experience testing Android apps on dedicated POS hardware
• Proven history executing version testing: feature, regression, and hotfix validation across releases
• Solid test case design skills (boundary, risk-based, negative paths) and meticulous documentation
• Proficiency with Android test tooling basics: ADB, logcat, device settings, and network conditioning
• Comfortable verifying tickets end-to-end: reproducing issues, validating fixes, and closing with evidence
• Attention to detail, ownership of release quality, and clear communication with cross-functional teams
• Familiarity with test management tools like Testrail, practical API testing knowledge (e.g., REST/JSON, status codes, basic contract validation), and CI acceptance checks

We are looking for a Middle .NET Developer to join a long-term full-time engagement. In this role, you will work on the development and enhancement of a large-scale enterprise platform in the logistics and freight management domain. The system has been successfully running in production for over 20 years and continues to evolve with new capabilities, integrations, and optimization tools.

You will collaborate with a distributed engineering team to improve existing functionality, build new features, and contribute to the scalability and reliability of the platform.

Responsibilities:
- Develop and maintain backend functionality using .NET;
- Build and integrate APIs with internal and external systems;
- Contribute to the evolution and optimization of the existing platform;
- Work with Azure cloud infrastructure;
- Support and improve CI/CD pipelines;
- Collaborate closely with developers, QA engineers, and product stakeholders.
 

Tech stack:
- .NET;
- Azure Cloud;
- Azure SQL Database;
- JSON-based APIs;
- CI/CD pipelines (Azure DevOps or GitHub Actions).

Requirements:
- 2–3+ years of commercial experience with .NET;
- At least 1 year of hands-on experience with Azure;
- Experience working with REST / JSON APIs;
- Understanding of CI/CD processes;
- Experience with relational databases (Azure SQL or similar);
- English level: Upper-Intermediate or higher.

We offer:
- Flat hierarchies and short decision paths, openness to new ideas
- Flexible working schedule
- Reimbursement for professional certification
- Annual paid vacation — 18 working days
- Paid sick leave — 10 working days
- English classes
- IT club card — applicable to the Lviv region
- Sport classes compensation
- Comfortable office locations or remote work.

HS-Soft provides a comprehensive digital ecosystem for the food industry – covering POS and payment, inventory management, production, and recipe management. Our customers are primarily from the baking trade, gastronomy, and the butcher’s industry.

Our solutions are fully SaaS-based and run on a modern cloud platform (AWS latest & greatest), combined with centrally managed POS hardware. We currently support more than 600 companies with several thousand devices across Switzerland and Germany – and we are growing fast. Within our industry, we stand for consistent innovation. Naturally, we use AI agents internally and already provide our customers with first AI-powered value-added features.

We foster a very open, appreciative, and direct company culture. Alongside the success of our customers, the continuous development of our employees is a core focus.

As a Technical Support Analyst, you are part of our technical support and customer success organization. You analyze technical support cases escalated from first- and second-level support and investigate them thoroughly and systematically.

Your focus is on analyzing data, logs, and system behavior, understanding technical dependencies, and preparing complex incidents in a way that enables our product and development teams to work efficiently on solutions. In doing so, you play a key role at the interface between support and development and actively contribute to reducing the workload of our engineering teams.

Your Responsibilities

• Analysis of complex technical support cases escalated from first- and second-level support
• Investigation of incidents using:
  • Database queries (e.g. Aurora, DynamoDB)
  • Log analysis of devices and applications
  • Monitoring and observability tools in an AWS serverless environment
• Analysis of API communication and the interaction between frontend, backend, and connected systems
• Identification of inconsistencies, error patterns, and potential root causes in distributed SaaS systems
• Structured technical preparation of incidents for handover to product and development teams
• Close collaboration with development and product management on systemic or recurring issues
• Documentation of analysis results, findings, and technical background information

• Supporting the support team through technical assessment and knowledge sharing

   

You work exclusively internally with support, product, and development teams and have no direct customer contact.

Important: This role does not include active software development and does not involve on-call or standby duties. The focus is on analysis, understanding, and communication of technical issues.

Why We Created This Role

Our products and technical platform have grown significantly over recent years. As a result, the demands for in-depth technical analysis of support cases have increased as well.

Until now, particularly deep technical analyses – for example in databases, logs, or API communication – were handled directly by our development teams. With the Technical Support Analyst role, we are introducing a new position within support that takes ownership of exactly these tasks: thoroughly analyzing technical incidents, identifying root causes, and preparing problem statements in a structured way for development.

This allows us to improve response times in support, relieve our development teams, and at the same time create an exciting technical role at the intersection of support, product, and engineering.

What We Expect From You

• Experience in technical support, system analysis, or a comparable technical role
  (talented junior profiles with a strong technical mindset are explicitly welcome)
• Strong fundamental understanding of SaaS architectures, cloud infrastructures, and distributed systems
• Experience with data analysis and database systems (SQL & NoSQL; ideally Aurora, DynamoDB, or similar)
• Basic understanding of API communication, log analysis, and monitoring / observability concepts
• Analytical, structured, and solution-oriented way of working
• Ability to clearly document complex technical topics and communicate them in an understandable way
• Very good English skills, written and spoken, for internal communication
  (German is a plus, but not required)

Nice to have (but not required):

• Experience or interest in POS and retail systems
• Understanding of Android-based systems and applications (or strong willingness to learn)

What We Offer

• A central technical role within support with direct impact on product quality and customer satisfaction
• Challenging technical topics in a modern AWS serverless SaaS environment
• An open, international, and supportive team
• A modern working environment without outdated tools, VPNs, or “servers in the basement”
• No on-call duties and predictable working hours
• Short decision-making paths and plenty of room to actively shape processes and interfaces
• Personal development opportunities, coaching, and long-term perspectives at HS-Soft

We are looking for an Android Developer to build and support software for POS (Point-of-Sale) systems. You’ll work on Android applications used in real retail environments, integrating with USB peripherals and EFT/payment terminals, and collaborating across mobile + backend to deliver reliable, testable, production-grade solutions.

What you’ll do

• Develop and maintain Android POS applications used in day-to-day retail operations
• Integrate and support USB peripherals (e.g., scanners, printers, cash drawers) and EFT terminals
• Evolve UI architecture: maintain XML screens, build new features in Jetpack Compose, and contribute to XML → Compose migration
• Design and implement clean, modular app architecture
• Build robust asynchronous flows using Kotlin Coroutines
• Write and maintain Unit tests and UI tests, improving stability and regression coverage
• Contribute to backend features and integrations where needed (Node.js / GraphQL / T-SQL / AWS)
• Participate in code reviews, debugging production issues, and improving performance and reliability

Must-have skills

• Strong Kotlin experience (production apps)
• Kotlin Coroutines for async and concurrency
• UI: Android XML + Jetpack Compose, including migration experience from XML to Compose
• Hands-on experience with USB peripherals and EFT/payment terminals
• Dependency Injection
• Solid experience writing Unit tests and UI tests

Backend

• Node.js
• T-SQL
• GraphQL
• AWS services (e.g., Lambda, API Gateway, DynamoDB/RDS, S3, CloudWatch—depending on stack)

What we value

• Practical engineering mindset: stability, observability, and maintainability matter
• Ability to work with hardware constraints and real-world retail workflows
• Ownership: you can take a feature from idea → implementation → testing → support