Jobs at Djinni

Remote, Poland (Warsaw or Kraków preferred) · Full-time contract · Hours: 11:00 AM – 7:00 PM Poland time (required)

Rx360 is building a wearable and AI companion that helps seniors live independently and stay connected to the people who care about them. Our mission is to give older adults confidence in their everyday lives, and to give their families peace of mind.

Our team works across hardware, firmware, software and AI. We move quickly, care deeply about the people we build for, and hold a high bar for quality and trust.

We're looking for a Senior Product Manager to lead the product direction for our AI. You'll shape how intelligence shows up across our wearable and app, and help define what a truly helpful AI companion looks like for older adults.

What You Will Do

• Own the vision, strategy and roadmap for Rx360's AI Companion
• Turn complex AI and machine learning capabilities into simple, intuitive experiences
• Tell a clear story about where the product is going and why
• Understand users deeply through research, data and direct feedback
• Write clear product requirements, from early concepts to launch criteria
• Define how we measure AI quality and decide when features are ready to ship
• Partner with data science and engineering on data, evaluation and model improvement
• Work closely with hardware, firmware, app and clinical teams to deliver end to end
• Prioritize and make sound trade-offs with incomplete information
• Communicate progress, risks and decisions to leadership
• Support pilots and launches, and use what we learn to shape what's next

What You'll Bring

• 5+ years of product management experience, including shipping AI or ML-powered products to real users
• Strong working knowledge of machine learning: data, evaluation, metrics and trade-offs
• Experience with LLMs, conversational AI or voice assistants
• Experience with connected devices, wearables or sensor data
• A track record of leading cross-functional teams from idea to launch
• Strong product judgment for non-technical users
• Excellent written and spoken English
• Comfort working remotely and asynchronously across time zones
• Curiosity, humility and a bias for action
• Empathy for older adults and the people who care for them

Nice to Have

• Experience with wearables
• Background in digital health or consumer health technology
• Experience with on-device or embedded ML
• Startup experience through early launches

How to Apply

Send your CV and a short note about an AI product you helped ship and how you measured its success.

Rx360 is an equal opportunity employer. We welcome candidates of all backgrounds and do not discriminate on the basis of any protected characteristic.

About the Role: 

OptiPlay is expanding. We are launching a dedicated sub-studio (our second game development squad) and are looking for a strong Game Producer to take full ownership of its pipeline and product vision.

Key Responsibilities:

• End-to-End Ownership: Drive the entire slot development process for the sub-studio—from initial concept and documentation (GDD) to certification, launch, and live-ops;
• Team Building: Hire and lead your dedicated creative unit, including Artists, 2D/Spine Animators, and Game Designers;
• Cross-Functional Collaboration: Effectively manage workflows with resources (Math designers, Developers, and QA) to ensure seamless delivery without bottlenecks;
• Roadmap & Strategy: Define and prioritize your studio’s product roadmap (mechanics, volatility mix, themes) in alignment with co-founders and the overall go-to-market strategy;
• Compliance & Certification: Drive certification readiness (GLI/BMM) and ensure all titles meet strict regulatory standards for key jurisdictions;
• Data & Performance: Set up and monitor game analytics and KPIs (GGR per title, retention, feature engagement, ARPDAU, hit rate).

Requirements:
 

• 5+ years in iGaming (slot provider or similar B2B environment), with a proven portfolio of released slot titles;
• Deep Math Understanding: Strong grasp of slot mathematics (RTP, volatility, hit frequency, bonus features, jackpots) to effectively collaborate with shared math resources;
• Delivery Focused: Proven ability to deliver slot titles from concept to launch in a lean, fast-paced environment;
• Compliance Knowledge: Hands-on experience with GLI/BMM certification processes and regulatory constraints;
• Entrepreneurial Mindset: Proactive, comfortable with high autonomy, and capable of setting up clear production pipelines from zero;
• Communication: Strong ability to sync with shared tech teams, report directly to founders, and manage external partners.

Nice-to-Have:

• Experience in building or scaling a game development team / sub-studio.
• Exposure to RGS platforms, aggregator integrations, and regulated markets.
• A strong mix of product vision, visual design taste, and data-driven decision-making.

Benefits:

• 21 vacation days + 2 extra day-offs annually;
• 12 paid sick days;
• Fully remote format — work from anywhere you feel productive;
• Flexible schedule: start your day anytime between 08:00–11:00 CET;
• Fixed budget for health insurance and gym/fitness;
• Provided all required work equipment;
• Zero bureaucracy and direct communication with founders and C-level;
• Minimal meetings, async-friendly workflow;
• Startup energy: fast motion, creativity, and tight-knit communication;
• Business trips and team meetups several times per year;
• Multiple salary payout options (flexible formats);
• …And many more perks unlocked after we hit break-even.

Remote, Poland (Warsaw or Kraków preferred) · Full-time contract · Hours: 11:00 AM – 7:00 PM Poland time (required)

Rx360 is building a wearable and AI companion that helps seniors live independently and stay connected to the people who care about them. Our mission is to give older adults confidence in their everyday lives, and to give their families peace of mind.

Our team works across hardware, firmware, software and AI. We move quickly, care deeply about the people we build for, and hold a high bar for quality and trust.

We're looking for a Senior Product Manager to lead the product direction for the Rx360 wearable. You'll shape what our device does, how it feels on the wrist, and how it comes to life, from early concept through manufacturing and launch.

What You Will Do

• Own the Rx360 wearable end to end, including the vision, strategy and roadmap for current and next-generation devices, solving real customer and business problems
• Shape a distinctive product story grounded in deep customer insight
• Lead market research, competitive analysis, and qualitative and quantitative user studies, including user testing and pilots
• Write and maintain product requirements, track progress, and drive timely decisions
• Design for older adults, from comfort and readability on the wrist to accessories, packaging and the out-of-box experience
• Prioritize features and improvements, balancing cost, timeline, battery life, size, durability and experience
• Guide the product from concept to end of life, spotting and resolving issues early so engineering and design deliver on time and to a high standard
• Partner with design, hardware, firmware, software, clinical team, and AI teams working hand in hand with our software product managers
• Partner with Manufacturing to turn requirements into build plans and quality gates.
• Collaborate with manufacturing partners to transform specs into production milestones and quality standards.
• Communicate priorities, plans, progress and risks clearly across the company
• Prepare for launch, including positioning, pricing and product readiness, and use what we learn to shape what comes next

What You'll Bring

• 5+ years of product management experience, including at least one hardware product taken to market
• Required: availability to work 11:00 AM – 7:00 PM Poland time (CET/CEST) to ensure overlap with our U.S. team
• Hands-on knowledge of the hardware development cycle: prototypes, engineering builds, validation and mass production
• Experience with connected electronics and how hardware, firmware and apps work together
• Experience working with contract manufacturers and suppliers
• Sound judgment on trade-offs between cost, schedule, quality and user experience
• A track record of leading cross-functional teams from idea to launch
• Excellent written and spoken English
• Comfort working remotely and asynchronously across time zones
• Curiosity, persistence and a bias for action
• Empathy for older adults and the people who care for them

Nice to Have

• Experience with wearables
• Background in consumer health or connected medical devices
• Startup experience through early launches

How to Apply

Send your CV, a short note about a hardware product you helped bring to market and what you learned along the way, and a sample PRD (redacted if needed, or written for a product idea of your own).

Rx360 is an equal opportunity employer. We welcome candidates of all backgrounds and do not discriminate on the basis of any protected characteristic.

About us :

Techstack is a technology product engineering company that sets an example for high development standards in the IT industry. We empower each team member to influence the development of the product, company, and processes.

Description :

We are looking for a curious and proactive Lead Generation Trainee to join our team at Techstack.

In this role, you will explore the IT market, research companies and relevant data, prepare lead generation campaigns, and work with our internal tools, automation, and AI-powered solutions.

About the Product :

Our Lead Generation team helps Techstack reach potential clients across Europe and the US by identifying relevant companies, industries, and business opportunities.

We combine market research, data collection, automation, and AI-powered solutions to build and launch targeted campaigns. Our team also continuously explores new tools and approaches to improve research methods and make processes more efficient.

Your Team :

You will join a small, collaborative Lead Generation team where each specialist has their own area of responsibility while also contributing to shared projects and research activities.

Your Responsibilities :

• Research companies, industries, markets, and relevant professional communities.
• Identify and collect relevant information from various online sources.
• Explore new approaches to data research and collection.
• Prepare and launch targeted lead generation campaigns.
• Work with internal tools and automation solutions.
• Explore AI-powered tools and identify opportunities to improve existing workflows.
• Participate in research and development activities to find more efficient ways of working.
• Gradually take ownership of assigned projects and processes.

It’s About You :

• You have a basic understanding of the IT industry and current technology trends.
• You have good online research skills and can find, analyze, and structure relevant information.
• You have strong analytical thinking and attention to detail.
• You can independently investigate unfamiliar topics and find solutions without step-by-step guidance.
• You are interested in technology, data research, automation, and AI tools.
• You are proactive, adaptable, and willing to learn new tools and processes.
• You can stay focused and productive when working on repetitive or detail-oriented tasks.

Would be a plus:

• Completed Lead Generation courses or relevant training, preferably with a certificate.
• Technical education or currently pursuing a degree in a technical field.
• Previous exposure to Lead Generation, market research, data collection, or web scraping.

How to Join:

1. Pre-screening with a Recruiter.
2. English Language Assessment.
3. Test Assignment.
4. Interview with our experts.

Culture:

At Techstack, we care about how we build products — not only about the result, but also about the quality of the engineering process and the way we work together.

We encourage people to keep learning, share what they know, and take ownership of their work.

Tech Guilds — communities where specialists share knowledge, discuss technical solutions and approaches, and keep up with industry trends.

Meetups and knowledge sharing — opportunities to share your experience with colleagues and the wider tech community.

Mentoring and leadership — opportunities to grow as a mentor, technical lead, or take on other roles where you can support others and share your expertise.

We believe that good products come from people who care about what they build, keep developing their expertise, and are comfortable both challenging ideas and being challenged.

What we have for you:

• Flexible work format — remote work or one of our hubs in Kyiv, Lviv, Kharkiv, or Wrocław, plus flexible working hours.
• Professional growth — Tech Guilds, mentoring, meetups, knowledge sharing, and other development opportunities.
• Education support — 50% compensation for professional courses, trainings, webinars, and certifications.
• English — free General English, Business English, and speaking clubs.
• Time off — 20 paid days off and 7 paid sick days per year, plus additional days off.
• Support — legal and accounting support.
• Community — online and offline team activities, professional events, and appreciation gifts.

See yourself in this role? Send us your resume and let’s start the conversation!

We are looking for a Corporate Legal & VAT Specialist to join our PSP Department and independently own the corporate and legal documentation function within our international business structure.
 

This role is highly autonomous and involves direct cooperation with Compliance, Finance, auditors, accountants, tax advisers and external legal / corporate service providers.
 

You will work hands-on with Cyprus corporate structures, corporate documentation, contracts, audit support and Cyprus VAT-related matters, as well as cross-border counterparties and international business structures.
 

What you’ll do:

• preparing a complete legal documentation package for each company’s annual audit;
• maintaining and updating corporate documentation, including constitutional documents, certificates, registers, resolutions, powers of attorney, and information on directors, shareholders, and UBOs;
• Ppoviding comprehensive legal support to companies across multiple jurisdictions, including incorporation and corporate administration through external service providers, as well as drafting and reviewing agreements, invoices, service acceptance certificates, and supporting materials required for the proper documentation of business transactions;
• preparing legal explanations in response to requests from auditors, accountants, and tax advisers;
• establishing a legally and documentarily consistent framework for relationships with existing counterparties, taking into account the actual partnership model, financial flows, and Cyprus VAT requirements, including the application of the reverse charge mechanism.
   

What we’re looking for:

• 3+ years of experience in corporate law, corporate administration, legal operations or a similar role;
• hands-on experience with Cyprus companies;
• pactical knowledge of Cyprus corporate law;
• experience supporting annual audits and audit documentation;
• practical knowledge of Cyprus VAT, VIES and reverse charge;
• experience working with corporate registers, resolutions, powers of attorney, UBO/shareholder documentation and other corporate records;
• experience preparing and reviewing commercial agreements and supporting documents;
• strong written English;
• high level of ownership, attention to detail and ability to work independently;
• ability to understand the actual business relationship behind the documents and build the appropriate legal and documentary framework around it;
• ability to communicate effectively with Finance, Compliance, auditors, accountants, tax advisers and external corporate service providers.
   

Will be a plus:

• experience working with international groups and cross-border business structures;
• experience in fintech, PSP, EMI, VASP or other regulated / financial services businesses;
• experience working with international corporate service providers;
• experience handling multiple Cyprus entities simultaneously;
• understanding of international corporate and compliance processes.
   

What makes this role interesting:

• fully remote work;
• high level of autonomy — you will own your functional area rather than work under constant supervision;
• direct communication with Compliance, Finance, auditors and external advisers;
• hands-on work with real Cyprus corporate structures and international business operations;
• ppportunity to work closely with an international PSP business and gain deeper exposure to corporate, legal and compliance processes.

We are looking for a Corporate Legal Specialist to provide legal support to existing companies within our international group, with a primary focus on Cyprus. This is a fully remote, full-time role.
 

The role is about making sure the corporate structure, contractual relationships and business documentation of our companies are legally sound and reflect how the business actually operates. The expected result is that every company is consistently ready for its annual audit.

What you’ll do:

• providing comprehensive legal support to companies in Cyprus and other jurisdictions, covering corporate matters, contractual relationships and documentation of business transactions;
• drafting, reviewing and negotiating commercial contracts, amendments and other documents needed to properly document business activities;
• analyzing actual cooperation arrangements with counterparties, including the parties’ obligations and financial flows;
• ensuring consistency between contracts, invoices, service acceptance certificates, supporting documents and actual business transactions;
• keeping the companies’ legal and corporate documentation continuously ready for annual audits;
• supporting corporate changes and liaising with external corporate service providers and consultants;
• analyzing existing corporate structures and contractual relationships between group companies and external counterparties, taking into account the actual business model, financial flows and Cyprus VAT requirements;
• identifying legal and documentary discrepancies, proposing solutions and promptly informing the Head of Department.
   

What we’re looking for:

• 3+ years of practical experience in corporate law or legal support for international businesses;
• hands-on experience supporting Cyprus companies;
• practical knowledge of Cyprus corporate law;
• understanding of corporate structures, contractual obligations and the legal aspects of financial relationships between companies;
• ability to understand the actual business model behind the documents, identify legal risks and propose well-reasoned solutions;
• English at B2 level or above, including legal documents and business correspondence;
• a systematic approach, independence within your area of responsibility and ownership of results.
   

Will be a plus:

• experience working with international groups of companies;
• experience in fintech or other regulated / financial services businesses;
• experience working with banks, EMIs and PSPs.
   

What makes this role interesting:

• fully remote, full-time work;
• autonomy within your area of responsibility, without constant supervision;
• hands-on work with established international corporate structures;
• involvement in improving existing legal processes;
• competitive remuneration, discussed individually.

Cropwise Operations is a global leader in digital agritech solutions, operating in over 50 countries and helping optimize business processes and improve the efficiency of agronomic decision-making.  

We are looking for a skilled Ruby on Rails Developer to join our team.

What we expect from a candidate:

- Preferably 3+ years of Ruby on Rails development experience.

- Strong knowledge of Rails.

- Experience with testing frameworks like RSpec and Capybara.

- Testing with RSpec/Capybara.

- Basic knowledge of ES6 + React.js.

- Experience with JavaScript.

- Standard Rails application deployment stack (Git, CI, Capistrano, *nix).

- Knowledge of HTML/CSS.

What exactly will you need to work with:

- Backend on Ruby on Rails 7.0 (Ruby 3.2).

- PostgreSQL + PostGIS database (handling large geospatial datasets).

- Job processing with Resque + Redis.

- Testing on RSpec + Capybara + CI.

- Partially frontend on React.js (ES6, JSX).

What else can you work with?

- Algorithms for processing large amounts of geodata.

- Reception and processing of binary data (Ruby eventmachine).

- Working with RabbitMQ.

- AWS, Google Cloud, Kubernetes.

- Visualization and work with geodata on the frontend (Mapbox GL JS).

Hiring process:

- Intro call;

- Test Task;

- Final Interview;

- Offer.

The company offers:

- Opportunity to be a part of a best-in-class product that is used by thousands of companies around the world.

- Participation in complex technical tasks and challenges.

- Environment where you need to seek and implement unique engineering and technical solutions.

- Trainings and development programs.

- Flexible work formats: remote, office or hybrid.

- Health and life insurance for employees and your family members.

- 32 working days of paid annual leave and sick leave.

About Cropwise Operations

Cropwise Operations is a SaaS platform for farmers, leveraging cutting-edge technologies such as computer vision, big data, and AI to deliver actionable insights and improve agricultural outcomes.

For seekers, cooperation with Cropwise Operations is an opportunity to be part of a best-in-class product used by hundreds of companies around the world, and to deal with complex technical tasks in the field of neural networks and machine learning with the need to constantly improve their knowledge and skills, to find and implement unique engineering and technical solutions.

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.

Why this role exists:

This role exists to scale and stabilize the core data infrastructure powering our real-time analytics and decision systems. You’ll help us deliver accurate, zero-latency business insights by designing robust ingestion pipelines, building clean semantic models, and maintaining rock-solid data governance across the platform.
 

What you’ll drive:

Architecture & Data Modeling

• Design and implement scalable data transformation layers, organizing raw data into validated, production-grade data marts.
• Build and optimize semantic layer models, ensuring consistent metrics and definitions across all reporting surfaces.
• Establish data modeling standards utilizing optimal storage formats (Parquet, ORC, AVRO) and storage engines (PostgreSQL, ClickHouse, Redshift/BigQuery).

Pipeline Delivery & Execution

• Ship and maintain end-to-end data ingestion pipelines integrating internal services and third-party event streams (Kafka, Kinesis, external APIs).
• Automate data quality and integrity testing to catch pipeline breaks and silent schema drifts before they reach downstream consumers.
• Tune query performance and pipeline bottlenecks, actively managing indexing, data partitioning, and job scheduling.

Platform Operations & Integration

• Expose data-centric services by building and managing performant REST APIs using modern frameworks (FastAPI, Flask, or Aiohttp).
• Enforce granular access control across our data layers via RBAC, row-level security (RLS), and column-level masking.
• Automate CI/CD workflows and deployments using Docker, GitLab CI, and Terraform across our cloud infrastructure.

Engineering Quality & Cross-Team Alignment

• Partner with product managers, software engineers, and analysts to translate business logic into maintainable technical requirements.
• Participate in thorough code and architecture reviews, upholding strict testing standards (unit, integration, TDD/BDD).
• Document system designs and data catalog schemas, making data discoverable and self-serve across the organization.

What makes you a GR8 fit:

Must-have

• 3+ years of production experience in Data Engineering, Software Engineering, or related distributed data systems.
• Proven SQL & Database expertise: Strong hands-on work with relational databases (PostgreSQL) and modern analytical/columnar data warehouses (ClickHouse, BigQuery, or Redshift).
• Demonstrated pipeline & distributed compute skills: Practical experience orchestrating distributed jobs (Spark, Trino, Flink) and handling event streaming engines (Kafka, RabbitMQ, or Kinesis).
• Solid software engineering foundations: Proficient in writing clean, modular Python for data applications, pipeline orchestration, and REST APIs.
• Linux, Container, & CI/CD literacy: Comfortable writing Dockerfiles, configuring CI/CD pipelines (GitLab CI, GitHub Actions), and utilizing Git version control.
• Data quality discipline: Direct experience implementing automated data testing, schema validation, and pipeline observability.

Nice-to-have

• Hands-on experience with Infrastructure as Code (Terraform) and AWS cloud services.
• Practical exposure to metadata management tools (DataHub, OpenMetadata).
• Understanding of resilience patterns in distributed systems (circuit breakers, rate limiting, connection pooling).
• Degree in Computer Science, Software Engineering, or equivalent practical experience.

Why you’ll love working here:

Benefits Cafeteria — annual budget you allocate to:

• Sports • Medical • Mental health • Home office • Languages.

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.

What you will do:

— Provide high-level support to premium players via LiveChat, WhatsApp, and email;
— Handle complex requests related to payments, bonuses, technical issues, and in-game situations;
— Personally assist key players, helping them navigate the platform;
— Monitor player activity history, engagement, account settings, and VIP program status;
— Escalate issues to internal teams (payments, tech support, backend);
— Suggest improvements to the VIP service and contribute to the development of new features.

What we expect:

— 1+ years of experience in iGaming, Customer Care or related industries;
— Excellent communication skills: attention to detail, empathy, and clear, professional language;
— Stress resistance and the ability to work with demanding clients;
— English proficiency at C1 level or higher (written);
— Confident use of CRM and ticketing systems; strong technical literacy.

What we offer:

— Remote work, 5/2 schedule (Wednesdays and Thursdays off, 12 - 21);
— Payments in USDT (white crypto);
— Fixed salary of $1000 + performance-based bonuses (KPI);
— Access to Gemini Advanced;
— Training and support from an experienced international team;
— Opportunity for growth within the project.

Our client is an energy solutions provider. Our AI-enabled platform supports operations, tracking and decision-making to optimize large-scale renewable and traditional energy portfolios. We're delivering a key client MVP in February 2027, and the project continues into 2028. Our stack: Ruby on Rails, Node.js/TypeScript and Python services, PostgreSQL, Snowflake and AWS. We're looking for an autonomous data engineer to strengthen our data foundation through good modeling, clean schemas, reliability and automation.

Responsibilities

Work closely with product teams to help define and execute technical criteria

Architect and maintain robust data ingestion pipelines that feed both our application and analytics

Design well-modeled, layered tables with clean schemas that turn raw data into analytics-ready data

Help onboard client data from a variety of sources, such as Databricks via Delta Sharing, and integrate it with our existing services and workflows

Make pipelines reliable and automated: data quality tests, monitoring, safe reprocessing and schema change handling

Build a documented, well-tested data foundation that serves the app, analytics and future AI use cases

Skills

Must have

Mid-to-senior data engineer who has owned the design of production data pipelines end to end, working as an autonomous IC

Designing and building production ingestion pipelines from APIs, files and shared-data sources, using a workflow orchestrator (any tool, e.g. Airflow, Dagster or Step Functions)

Production experience with a cloud data warehouse (Snowflake preferred)

Strong SQL, plus production experience in Python (preferred) or Node.js/TypeScript

AWS or another enterprise cloud platform

AI-native development: daily use of agentic AI coding tools, and experience scaling shared AI workflows across a team and into the development lifecycle, including CI/CD

Strong English and communication skills

Nice to have

dbt

Preparing data for AI/LLM use (e.g. semantic layers, metadata, retrieval-ready datasets)

Infrastructure as code (e.g. Terraform)

Exposure to energy, utilities or sustainability data

The Mission

Wallee Group is a leader in advanced payment solutions, dedicated to providing robust, scalable, and secure systems across multiple domains. We enhance customer experiences through innovative payment and finance technology that empowers businesses to grow efficiently. With operations spanning several countries, we thrive on collaboration and agility, utilizing the Scrum framework to drive our international teams. At Wallee, we stay at the forefront of market trends, continuously innovating to deliver premier services to our global customers.

The Role

To achieve our mission of providing the market's best payment experience, Wallee is seeking experienced and versatile java software engineers. As disruptors in the payment space, we build industry-leading systems that demand the highest standards of security and reliability. We are constantly pushing our solutions into new territories, and we are looking for engineers who thrive in a fast-paced, agile environment to help us redefine the future of finance.

Tasks

Your Impact

• Architect Scalability: Design and develop highly resilient back-end systems using Java, ensuring our infrastructure handles global scale with ease.
• Feature Innovation: Own the end-to-end lifecycle of new features, from initial implementation to refined bug fixing and performance tuning.
• Collaborative Engineering: Work closely with product managers, UX designers, and QA to translate complex business needs into elegant technical solutions.
• Code Excellence: Drive quality through automated testing, rigorous code reviews, and the creation of clear, maintainable technical documentation.
• Stay Ahead: Continuously research and evaluate emerging technologies and methodologies to keep Wallee at the cutting edge of the fintech industry.

Requirements

What You Bring to the Table

• Technical Depth: Advanced proficiency in Java and core frameworks such as Spring, Spring Boot, and Hibernate.
• Systems Thinking: Proven experience building distributed systems and scalable, high-availability solutions.
• Data Mastery: Strong proficiency in SQL and experience managing complex data structures.
• Modern DevOps: Hands-on experience with CI/CD pipelines (Jenkins/GitLab CI) and containerization (Docker, AWS ECS).
• Agile Mindset: A degree in Computer Science (or equivalent experience) and a track record of thriving in fast-paced, Agile environments.

• Bonus Points: Experience with JavaScript, Apache Camel, or BPM engines.

   

  Benefits:

• You are part of an agile, young international team and shape our products sustainably with your ideas.
• You will play a decisive role in designing products in an omni channel payment start-up and work with leading companies in the financial industry on international projects.
• We offer flexible structures and flat hierarchies.
• Cooperation with motivated colleagues and numerous personal development opportunities.

Responsibilities

• Maintain and extend existing functionality in a large legacy PHP 7.4 codebase.
• Design and implement robust solutions for bug fixes, new features, and technical debt reduction.
• Optimize database queries and schema design using PostgreSQL.
• Refactor old modules and participate in gradual modernization plans.
• Collaborate with DevOps and QA to ensure system stability and deployment continuity.
• Participate in technical discussions, code reviews, and architecture planning.
• Work closely with cross-functional teams including product managers and front-end developers.

Requirements

• 5+ years of experience with PHP, including work with legacy systems (ideally PHP 7.x).
• Strong proficiency with PostgreSQL or similar relational databases.
• Deep understanding of object-oriented programming, software design patterns, and MVC architecture.
• Experience with RESTful APIs and integration of third-party services.
• Version control with Git.
• Strong debugging and performance profiling skills.

As A Plus

• Knowledge of Python for scripting or integration purposes.
• Experience working with SOAP web services and legacy protocols.
• Familiarity with WebSockets and TCP socket-level communication.
• Exposure to systems migration, re-architecture, or code modernization projects.

We Offer

• Competitive salary
• Flexible schedule
• Social package
• Courses, webinars, and seminars to increase professional skills
• Possibility to work remotely and onsite
• Horizontal hierarchy. No micromanagement pressure
• Open company culture where your ideas and initiatives are valued
• Regular team building & corporate events
• International projects

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 Middle Media Buyer 

Requirements:

• Independently managing key advertising campaigns
• Optimizing advertising campaigns
• Scaling campaigns
• Analyzing performance drops and promptly resolving issues
• Preparing regular performance reports and forecasting results
• Working with creatives
• Communicating with clients and contractors
• Monitoring deadlines and account balances
• Identifying opportunities to increase advertising budgets
• Developing existing partnerships

Requirements:

• Understands the company’s main advertising formats (banners, pre-rolls, bloggers, streamers, special projects, etc.).
• Follows the approved communication workflow.
• Prepares reports using existing templates.
• Has basic working knowledge of Excel and Google Sheets.
• Monitors campaign statuses and handles operational tasks.
• Understands basic marketing metrics (CPM, CPC, CTR, reach, and frequency).
• Uses the CRM and internal systems accurately and without errors.
• Updates campaign information in a timely manner.
• Monitors advertising budgets.
• Monitors creative performance and analyzes results.

Benefits

• Paid annual leave.
• Paid days off.
• RedCore TEAM corporate gamification system.
• Annual corporate events for employees.
• Reimbursement of business travel expenses.
• Flexible working format and start time.
• Employee learning and development system.
• Mentoring program.
• Overtime compensation.
• Referral program with a cash bonus.
• Corporate psychologist.
• Cafeteria benefit system: sports, insurance, language learning (depends on region).

We're looking for a mid-senior Backend Engineer with strong Go and PostgreSQL skills. You'll join an early-stage, venture-backed startup as one of its first backend hires. The company is building a TikTok-style endless scroll of user-generated hypercasual mini-games. Your job is to build the core services behind the game feed, user data and content delivery, and to shape the product's technical direction for years to come. This is a founding-level role with real ownership, for someone who wants to build from the ground up and not maintain someone else's system.

Details: 

• Location: Sofia, Bulgaria, on-site 5 days a week
• Employment: Full-time (no contractor, consultant or B2B setups)
• Level: Mid-Senior
• Relocation: Supported for strong candidates (1–1.5 months' notice maximum)

What you'll do

• Design and build the Go services that power the game feed, user data and content delivery
• Own PostgreSQL schema design and query performance as the product scales
• Own deployments and keep services reliable (Linux, Docker)
• Set up observability (logging, metrics, tracing) from day one
• Work on data pipelines and recommendation / feed-ranking logic
• Design REST APIs for iOS and Android clients
• Work closely with the founders on technical and product direction

Tech stack

Go, Fiber, PostgreSQL, Docker, Linux, REST APIs, data pipelines, recommendation systems

Requirements

• 3+ years of production Go experience, having shipped and maintained services under real traffic
• Solid PostgreSQL experience beyond basic CRUD, including schema design and query optimisation
• Hands-on experience with Linux and Docker, including owning deployments
• Based in Sofia or willing to relocate there
• Ready for full-time, 5-day on-site work

Nice to have

• Experience with recommendation systems, feed ranking or ML-adjacent data pipelines
• Background in hyper-casual gaming or rapid-prototyping environments
• Experience designing APIs for mobile clients
• A startup or founder-led mindset, comfortable with speed and ambiguity

Hiring process

1. Online interview to discuss your experience and mutual fit
2. In-person technical challenge and interview at the Sofia office

PrimeFox is looking for an experienced Head of CRM Retention for a new iGaming project focused on the Argentine market.

The project is preparing for launch. The product is being built on the SoftSwiss platform and will include Casino, Sportsbook and Prediction Market.

We’re looking for a strong leader with hands-on SoftSwiss experience, deep expertise in the Argentine market, and a clear understanding of how to build an effective CRM / Retention system from scratch.

Key Responsibilities

• Develop and execute the CRM / Retention strategy for Argentina.
• Build the CRM / Retention function from the ground up.
• Set up segmentation, trigger-based scenarios and automated communications.
• Design mechanics for retention, reactivation and growth of repeat deposits.
• Manage CRM campaigns, bonus offers and personalization.
• Develop Loyalty, VIP and Gamification mechanics.
• Analyze D7/D30 Retention, Repeat Deposit Rate, Reactivation, Churn, NGR and LTV.
• Optimize CRM activities based on analytics and A/B testing.
• Collaborate with Product, Affiliate, BI, Risk and Customer Support teams.
• Define KPIs, development plans and performance forecasts.
• Help build the CRM team as the project grows.

Requirements

• Proven CRM / Retention experience in iGaming in the Argentine market.
• Mandatory hands-on experience with SoftSwiss.
• Deep understanding of CRM analytics and iGaming economics.
• Experience with segmentation, automation, triggers and the player lifecycle.
• Successful track record of improving Retention, Reactivation, Repeat Deposits or NGR.
• Understanding of bonus economics and CRM campaign performance evaluation.
• Ability to independently set up the CRM / Retention function at the launch stage.
• Readiness to make decisions and take ownership of results.

Nice to Have

• Experience launching CRM / Retention from scratch.
• CRM team management.
• Casino and Sportsbook expertise.
• Experience implementing Gamification, Loyalty and VIP programs.
• Experience integrating CRM tools with SoftSwiss.

What We Offer

• The chance to launch a new iGaming brand in Argentina.
• The opportunity to build the CRM / Retention function and influence product strategy.
• Direct communication with project leadership.
• The opportunity to shape processes and grow the team.
• Competitive fixed compensation plus a performance bonus.
• Individually negotiated terms for strong candidates.

Important: we only consider candidates with real SoftSwiss and Argentina experience.

If you know how to build CRM / Retention systems, think in terms of analytics and financial results, and are ready to grow a new product from scratch, we’d love to hear from you.