Jobs at Djinni

We’re looking for a skilled Fullstack Developer to join our team and contribute to the development and maintenance of complex enterprise web applications. The projects involve working with established .NET-based platforms that support business-critical processes and integrations.

Tech Stack:
Backend: .NET Framework 4.8, .NET MVC, Razor Pages
Frontend: CSS, JavaScript
Database: MS SQL Server
Web Server: IIS
Version Control: Git

Would be a plus:
jQuery, Knockout.js

Responsibilities:

• Design, develop, and maintain scalable web applications using .NET Framework 4.8 and MVC architecture
• Build intuitive and responsive UIs with Razor Pages, CSS, and JavaScript
• Develop and optimize database queries and procedures on MS SQL Server
• Deploy and manage web applications on IIS
• Participate in code reviews, testing, and deployment processes

• Collaborate with the team on improving performance, security, and scalability of the platform

   

Requirements:

• 2+ years of experience working with .NET web applications.
• Strong experience in developing web applications using .NET Framework 4.8, .NET MVC, Razor Pages
• Solid understanding of MS SQL Server and ability to write efficient SQL queries
• Good knowledge of JavaScript, CSS, and front-end development best practices
• Experience working with Git and version control workflows

• Ability to work independently and in a collaborative team environment

   

Join us and become part of a team working on exciting and impactful enterprise solutions! If you are passionate about delivering high-quality software and enjoy solving complex technical challenges - we’d love to hear from you. Apply now!

Description

As a Software Development Engineer in Test, you will have the opportunity to work with components of robotic surgical systems on the client’s side.
Our client is located in NC, USA, and is a medical technology company focused on transforming surgical care through the integration of robotics, digital tools, and real-time analytics. Their innovative platform enables enhanced precision and efficiency in minimally invasive procedures, supporting improved clinical and economic outcomes.

Requirements

• Bachelor’s degree in Engineering, Biomedical, Computer, Electrical, or Software preferred.

• Python and C++ programming experience is required

• Strong understanding of testing methodologies, both manual and automated.

• Strong technical writing skills, with the ability to write, edit, and follow test protocols and test reports.

• Familiarity with regulated industry and testing environments (i.e. ISO 9001, ISO 13485, 21 CFR 820)

• Experience in manual testing of HW components

• Proficiency using testing tools and equipment

• Strong analytical and problem-solving skills

• Excellent communication skills and ability to work in a team environment

• Proficiency in English and ability to communicate with the clients

• Knowledge of Reliability testing is a plus

• Medical device or robotics industry is a plus.

Job responsibilities

•  Conduct comprehensive tests on surgical robot components and ensure thorough documentation of the testing process.
• Perform manual tests on surgical robot components and input devices
• Utilize appropriate testing tools and methodologies for accurate assessment
• Prepare detailed reports and documentation for each test scenario operations in the team.
• Collaborate with the development team and the client to identify and resolve issues
• Ensure compliance with safety and performance standards

We are currently looking for a Machine Learning Engineer to join a technology company specializing in navigation hardware for aerial vehicles. This is a fully remote position.

The company fosters a fast-paced startup culture with direct communication, a flat hierarchy, and minimal bureaucracy. You will work with people who value the Growth Mindset, embrace challenges, aren’t afraid to learn from mistakes, and focus on finding solutions rather than pointing fingers.

The company actively integrates automation and AI technologies into all company processes to be 10x more efficient, reduce routines, and free up time for creative jobs.

Key responsibilities:

• Perform data analysis to evaluate data quality, identify trends, and ensure suitability for machine learning experiments.
• Prepare and preprocess datasets, ensuring best practices for model generalization and robustness in ML models.
• Prototype and optimize data processing pipelines, collaborating with the DevOps team for seamless deployment.
• Design, train, and evaluate ML models in collaboration with senior engineers.
• Analyze experiment results, identify potential pitfalls, and propose improvements for model performance.

• Proactively communicate key findings, intermediate analyses, and experiment results to stakeholders and partners, translating insights into actionable recommendations.

   

Required skills:

• Upper-intermediate, preferably Advanced English.
• Master’s or PhD degree in Computer Science, Machine Learning, Robotics, or a related field.
• Commercial experience in Machine Learning, Robotics, or a related field.
• Solid command of Machine Learning, Statistics, and Signal Analysis.
• Hands-on experience with Python and ML frameworks such as TensorFlow or PyTorch, SciPy, and Scikit-learn.
• Strong understanding of data preprocessing, feature engineering, and model evaluation.
• Familiarity with supervised and unsupervised learning techniques applied to sensor or image data.

• Basic understanding of software engineering principles, including version control (Git) and containerization (Docker).

   

Preferred qualifications:

• Command of at least one other language for data analysis, such as R and Scala.
• Familiarity with the Spark data analysis framework.
• Exposure to robotics, reinforcement learning, SLAM (Simultaneous Localization and Mapping), or sensor fusion.
• Experience working with real-time sensor data (e.g., LiDAR, camera, IMU).

• Understanding of cloud-based ML model deployment and optimization techniques.

   

Note! When possible, add a link to your GitHub and any code examples with your application.

Ми шукаємо на проект AI Developer (middle level, 3-5 years).

Основні вимоги:

• 3+ Years of experience developing RL agent solutions
• Or 2+ Years of experience developing solutions with LLMs & RAG.
• 3+ Years of Software Development experience with proficiency in:
• Python:
• Numpy
• Torch or other gradient tracking tensor math library

Другорядні вимоги:

• 2+ Years of IoT and Timeseries data manipulation.
• 2+ Years of AWS cloud and/or Docker.
• 2+ Years using MLOps.
• Experience using AI for industrial process control.

• Working Knowledge of Test-Driven Development.

   

Підсумок по необхідним технологіям: Reinforcement learning (RL), LLMs & RAG, Python, Postgres, Numpy, PyTorch, IoT and Timeseries data manipulation, AWS, Docker, MLOps.

Важливо!: Excellent communication in English. (B1, Intermediate англійська не ок). Strong initiative, problem-solving mindset. Not just ticket takers – expected to be proactive and collaborative.
 

Обов’язки:

• Developing AI systems and tools for use in the client’s software offerings.
• Researching and designing new solutions to AI/ML/DS problems as needed.
• Educating and knowledge sharing AI research with a cross-functional team consisting of software development, engineering, and business domain experts.
• Learning Domain knowledge as necessary and working with SMEs to develop high-quality problem definitions.
• Owning the AI development lifecycle, inclusive of preparing data for use in AI systems, exploratory data analysis, model development, model deployment and implementation, monitoring, and maintenance.
• Collaboration with a globally distributed team that is remote and spread across various time zones.

Про клієнта та проект: Product company from USA. They offer AI-driven digital solutions for water treatment. Tech stack: Python (100%), Postgres, AWS, RL, LLMs, RAG, IoT, Time Series. Ongoing project with long-term expansion in Europe. 
 

Залученість: Full-time, remote, contract cooperation. Overlap with 10–11 AM EST scrum required (equals 5–6 PM Ukraine time). Flexibility is expected for occasional meetings with Singapore and India.

Дата старту: ASAP. 

Come and push your journey to the next level! 

At Immense Group, we are guided by our core values of passion, boldness, and integrity. We strive to create an environment where our people thrive, driven by a love for innovation and a commitment to delivering exceptional player experiences. If you’re passionate about iGaming and tech development bold in your approach, and act with integrity, we’d love for you to join our team as a Senior Backend Developer. 
 

A taste of what you’ll do 
The Senior Backend Developer works on Videoslots’ in-house projects by designing features, writing code, performing code reviews, solving problems, tracking down bugs and delivering stable and well written solutions. Versatility, ownership qualities, and enthusiasm for tackling technical challenges and problems across our stack are required in this role, as our platform continues to be built. 

• Designing and developing new Backend features  
• Performing functional requirements analysis  
• Proposing and owning architectural solutions across multiple projects  
• Writing high quality code and documentation  
• Maintaining and improving code in multiple projects including legacy code  
• Working closely with other developers, QA, and the product team  
• Applying analytical skills and be committed to quality.  
• Help tracking requests, issues, work progress and any other changes using our project management tools.  
• Providing estimates and technical documentation on request  
• Showing sensitivity to the performance, reliability
  and maintainability of your code    
• Managing individual project priorities, deadlines, and deliverables  
• Working in collaboration with external partners when required  
• Being responsible for the optimal maintenance of your development and test environments  
• Managing your code changes using our version control system  
• Coaching and mentoring other Backend developers   
• Performing code reviews  

Who and what we are after? 
 

• Bachelor’s degree in Computer Science or similar field  
• Minimum of 4 years of experience in a comparable software development role 
• PHP master  
• Proven Laravel experience would be considered as an advantage  
• Good knowledge of REST or GraphQL web services  
• Aware of the challenges which come with working on scalable and high-performant applications   
• Strong understanding of HTML5, CSS3 and JavaScript  
• Proficiency with development in Linux environments  
• Ability to proficiently document and write test cases  
• Structured, good attention to detail and thorough  
• Working proficiency and communication skills in verbal and written English 

Our recruitment process: 

• Cognitive/ Technical assessment
• HR interview with our TA Specialist 
• Technical interview with the hiring manager(s) 

Benefits:

• 25 days paid vacation days
• paid public holidays
• Private health insurance (for candidates residing in Ukraine)
• Additional marriage leave
• Additional paternity leave
• 5 days of paid sick leave
• Professional development support
• Department team building activities
• HR support

Description:

"Burn bright, not out" — this is the core philosophy of LEIME. Our corporate culture is built on innovation, empathy, and a healthy work-life balance.

As a company, we help leading brands in iGaming, Crypto, and Tech industries grow in Google SERP and win their target audience through top-tier media PR, expert content, and custom SEO strategies.

As a team, we inspire, educate, and support each other. We value experience as much as soft skills and shared values, enabling us to facilitate mutual growth.

If you dream of a job that motivates, a team that helps you deliver on your ideas, and career growth without overworking, LEIME hits the spot. Join us – let’s grow together!

Requirements:

• 3+ years of experience in Digital or iGaming;
• Deep understanding of affiliate models and digital service sales;
• English level C1;
• Strong negotiation skills and partnership management experience;
• Proactive, self-driven, and result-oriented.

Responsibilities:

• Actively search for and attract new partners;
• Conduct negotiations and agree on cooperation models;
• Manage partner relationships from onboarding to scaling;
• Collaborate with internal teams (SEO, content, sales);
• Monitor the market and generate new growth hypotheses;
• Analyze current partnerships and initiate improvements;
• Work with CRM and tracking systems.

Would be a plus:

• Experience in iGaming companies with affiliate programs and/or in digital agencies with international expertise;
• Hands-on experience working with affiliate networks and aggregators.

Benefits:

• Embark on a journey of personal and professional growth with our fast-expanding company;
• Join a team of dedicated and skilled professionals – fantastic collaborators both inside and outside the workplace;
• Remote work;
• Receive a competitive salary indexed in USD;
• The final salary package will be negotiated with the selected candidate.

We’re currently looking for a Facebook Media Buyer to join our in-house team and scale our own iGaming product. We’re a fast-growing brand in the iGaming vertical with a strong focus on performance, creative testing, and market adaptability. You’ll be working directly with our internal team, managing budgets, launching campaigns, and driving high-quality traffic that converts. This is a hands-on role with real impact and growth potential.

Requirements:

• 1+ year of experience working with Facebook traffic;
• Hands-on experience in the iGaming vertical;
• Proven success managing monthly budgets of $10,000+;
• Skilled in cloaking and tracking tools;
• English level: A2 or higher.
•  

Responsibilities:

• Launching and optimizing ad campaigns in Facebook Ads;
• Analyzing performance metrics and scaling campaigns;
• Developing and testing creative ad concepts;
• Managing budgets and spend distribution;
• Preparing briefs for designers to create ad creatives.
•  

Nice to have:

• Experience working directly with advertisers and building traffic acquisition strategies.

What we offer:

• Competitive and stable salary;
• Quarterly and annual performance bonuses;
• A fast-moving and professional team;
• Zero bureaucracy and full transparency;
• Real opportunities for career growth.

Requirements:

- 1+ years experience in sales of software development services, IT outstaffing; 

- Proven achievements: won sales, sales quota achieved; 

- Desire and ability to work proactively with customers as well as internal team to ensure the best sales achievements; 

- Excellent verbal and written communication skills; 

- Strong time management skills; 

- Ability to prioritize effectively, meet deadlines and execute all tasks; 

- Experience in account management; 

- Ability to maintain long-term client relationships and handle post-sale requests;

- Advanced English level, ability to communicate with foreign customers.

Responsibilities:

- Sales Specialist is a person who owns all sales activities aimed at selling; 

- Smart Tek's services and products to new customers, communicates with the prospects, and coordinates Presales Engineers and other people involved in sales process; 

- Manage sales deals pipeline to win new business; 

- Engage buyers and customers in a Consultative Selling sales approach;

- Manage multiple accounts simultaneously while being able to close deals of various complexities, sizes, and sales cycles; 

- Process inbound sales lead as well as generate leads on UpWork and other marketplaces; 

- Maintain CRM records of all sales leads, opportunities, and/or customer accounts while continually assessing and communicating goal attainment statuses; 

- Be a brand advocate during all customer and prospect interactions while identifying new opportunities that drive value; 

- Monitor the company’s industry competitors, new products, and market conditions to identify new business opportunities; 

- Maintain communication with clients after closing deals and build long-term relationships; 

- Coordinate all Smart Tek's team activities related to the prospects and/or accounts owned.

We offer:

- Variety of domains;

- Full stack of technologies;

- Professional and highly interactive team environment;

- Management style based on openness and trust;

- Stable support in personal education and growth;

- Worthy compensation;

- Active community with regular knowledge sharing;

- Flexible work conditions.

One of the world's largest fashion retailers selling in 215 markets through its online platform or its 6,477 stores in 95 markets. By working closely together as a single company globally focused on the key elements of fashion production – design, manufacture, distribution, and retail. All the production is founded on three pillars – flexibility, digital integration, and sustainability.
 

Requirements:

• 5+ years of commercial experience with Java
• Frontend testing and performance optimization
• CSS3/SCSS/HTML5, modern responsive design techniques
• Extensive experience with ES6, React, Redux, Redux-saga TypeScript, CSS, RESTful APIs
• Feel comfortable with modern front-end toolings like Webpack and Gulp
• Friend of Jest, unit testing, e2e testing
• Be great with version control, especially Git and tools like Bitbucket/GitHub
• Experience with Enzyme / react test utils
• Working experience in an Agile environment, a clear understanding of Agile methodologies mindset, and development practices applicable to them
• Experience of Spring framework and building Spring web applications
• Understanding and experience developing and deploying microservices
• Experience developing REST interfaces, OpenApi
• Working knowledge of relational databases, NoSQL technologies – Mongo DB
• Working knowledge of IBM MQ, Kafka, Kafka streaming
• Working knowledge of OpenShift, Kubernetes
   

Responsibilities:

• Research and evaluate technical options to implement business requirements
• Provide system or technical development expertise to the team
• Write quality, maintainable code with extensive test coverage in a fast-paced professional software engineering environment
• Provide effort estimations
• Work in close contact with team members and project stakeholders (Product Owner) on customer’s site
• Suggest technical and functional improvements to add value to the product
• Excellent communication, organizational, and facilitation skills, product-oriented mindset, focus on team results, willingness to continuous personal and team improvements, leadership qualities, and resilience.
• Upper-Intermediate/Advanced English level (there will be a lot of communication with the client).

We are a dynamic iGaming company with 5+ years of experience and a team of 1,000+ specialists. Our portfolio includes 8 successful projects, loved by players and operating across Tier 1-3 markets.

At our core, we attract and value top talent, allowing us to streamline processes and expand into new markets with confidence.

💼 Join us as a Customer Retention Analyst and become part of a team that drives data-informed decisions, enhances player engagement, and shapes the future of iGaming through smart analytics! 📊🚀

🎯 Who we’re looking for:
We’re on the hunt for a Customer Retention Analyst who’s passionate about player behavior, data-driven strategies, and lifecycle optimization! If you live and breathe cohorts, dashboards, and retention frameworks—this is your moment to shine! 🌟

💼 Your Responsibilities:
📊 Dive deep into behavioral and cohort analysis across all player segments: F2P, FTD, NGR+, VIP, Retained, Reactivated, Churned
🧠 Develop and validate retention hypotheses: welcome flows, win-back strategies, anti-churn triggers, personalized bonuses, and engagement boosters
📈 Build and maintain BI dashboards tracking key retention KPIs: LTV, churn rate, retention rate (D1, D7, D30), reactivation rate, ARPPU, repeat deposit rate, session frequency
🔍 Segment player base using RFM and clustering models
📣 Analyze performance of CRM campaigns (email, push, SMS, calls) and A/B tests
🤝 Support personalization of communication scripts and retention strategies
⚠️ Identify churn risks and reduce dependency on bonus-based retention

📌 What we’re looking for:
✔️ 3–5 years of experience in retention/lifecycle/CRM analytics—ideally in iGaming, e-commerce, or digital B2C
✔️ Proven track record with segmentation, cohort analysis, and A/B testing
✔️ Solid experience in BI reporting and dashboarding (Power BI, Tableau, Looker)
✔️ Strong grasp of retention metrics: LTV, churn, repeat rate, session frequency
✔️ Experience designing and analyzing A/B tests, uplift models, and control groups
✔️ Collaborated with CRM teams to launch and optimize personalized retention strategies
✔️ Comfortable working with SQL and data warehouses
✔️ Proactive in generating hypotheses, yet open to iterative teamwork and feedback

🛠 Tech & Soft Skills:
🧮 Advanced SQL and BI tools (Power BI preferred)
🔗 Familiarity with data architecture and automation pipelines
🗺️ Strategic mindset with a detail-oriented approach to customer journeys
💬 Strong communication skills and ability to collaborate across departments
📘 English proficiency (technical reading and documentation; writing is a plus!)

🚀 Ready to take your retention analytics career to the next level?
Apply now and let’s create game-changing strategies together! 🎉

As Senior Affiliate Revenue Operations, you will be responsible for overseeing and optimizing the entire operational workflow that sits between Sales, Affiliate Managers, and Finance — including revenue confirmations, payment preparations, partner onboarding, and system reconciliations.

You’ll manage one Operations Assistant and work closely with the CFO to build a scalable, risk-mitigated, and efficient process framework.

KEY RESPONSIBILITIES

Revenue Management & Advertiser Workflow

• Own the monthly advertiser reporting process from end to end
• Confirm revenues with Sales, Affise platform, and advertiser-side confirmations
• Manage follow-ups and email communications post-15th of every month until full confirmation
• Maintain and audit the bad debt list
• Supervise delta adjustments (positive/negative) in reporting and Affise
• Validate rejection handling and escalate anomalies Proactively engage partner advertisers finance with overdue balances to accelerate payment and reduce days-sales-outstanding
   

Affiliate Management

• Oversee preparation and weekly update of affiliate monthly reports
• Reconcile data between Affise and the internal Accounts Payable Automation tool
• Validate new affiliate IDs and ensure complete info handoff to Finance
• Approve reviewed payments submitted by Affiliate Managers
• Prepare weekly payment lists and monitor approval cycles
• Request and track top-up of payment methods as needed
  
  Systems & Tools Oversight
• Own Accounts Payable Automation tool management
• Liaise with Tech and Product teams for improvements and escalations
  
  Operational Strategy & Improvement
• Identify inefficiencies and redesign processes to scale
• Define and track operational KPIs; report performance to CFO
• Ensure clear process documentation and internal compliance with audit standards
• Lead weekly syncs with Finance and cross-functional stakeholders
   

REQUIREMENTS

Must-Have Qualifications

• 4+ years in Operations, Revenue Ops, or Finance Operations
• Strong experience working in fast-paced, tech-enabled companies (e.g. AdTech, SaaS, FinTech)
• High proficiency in tools like Excel/Google Sheets, CRM/ERP platforms, and workflow trackers
• Experience with Performance Marketing & Mobile Attribution Platform platforms (e.g. Affise) and internal reconciliation/payment tools (e.g. Accounts Payable Automation tools, or similar)
• Proven ability to own cross-functional processes and lead small teams
• Excellent written and verbal communication in English
   

✅ Bonus Points

• Background in performance marketing, media buying, or subscription-based business models
• Experience working in remote-first environments
• Familiarity with KPI frameworks, RACI models, and audit procedures
  
  WHAT WE'RE LOOKING FOR
• Highly organized and detail-oriented
• Strong sense of ownership and accountability
• A problem-solver who thinks process-first
• Comfortable navigating ambiguity and scaling systems
• Able to work independently but collaborate cross-functionally

As a Software Development Engineer in Test, you will have the opportunity to work with components of robotic surgical systems on the client's side. Our laboratory is based on-site in Kraków, and this is a full-time office-based position.
Our client is located in NC, USA, and is a medical technology company focused on transforming surgical care through the integration of robotics, digital tools, and real-time analytics. Their innovative platform enables enhanced precision and efficiency in minimally invasive procedures, supporting improved clinical and economic outcomes.

As part of the GlobalLogic team, you will grow, be challenged, and expand your skill set working alongside highly experienced and talented people.

Don’t waste any second, apply!

 Must Have

• Manual testing & Automated testing
• C++
• Python
• Linux

Nice to Have

• QNX

Job Description

• Bachelor’s degree in Engineering, Biomedical, Computer, Electrical, or Software preferred.

• Python and C++ programming experience is required

• Strong understanding of testing methodologies, both manual and automated.

• Strong technical writing skills, with the ability to write, edit, and follow test protocols and test reports.

• Familiarity with regulated industry and testing environments (i.e. ISO 9001, ISO 13485, 21 CFR 820)

• Experience in manual testing of HW components

• Proficiency using testing tools and equipment

• Excellent communication skills and ability to work in a team environment

• Proficiency in English and ability to communicate with the clients

• Knowledge of Reliability testing is a plus

• Medical device or robotics industry is a plus.

Job Responsibilities

● Conduct comprehensive tests on surgical robot components and ensure thorough documentation of the testing process.

● Perform manual tests on surgical robot components and input devices

● Utilize appropriate testing tools and methodologies for accurate assessment

● Prepare detailed reports and documentation for each test scenario operations in the team.

● Collaborate with the development team and the client to identify and resolve issues

● Ensure compliance with safety and performance standards

About the Role:
We are seeking an experienced NLP & AI Software Engineer to join our innovative team working on cutting-edge AI-powered solutions for document analysis, semantic search, and knowledge graph construction. You will contribute to the development of an advanced platform that integrates NLP, semantic relation extraction, embeddings, vector databases, knowledge graphs, and large language models (LLMs).

Key Responsibilities:
• Develop and implement NLP pipelines for document ingestion, text chunking, and semantic extraction.
• Use libraries such as spaCy, LangChain, Unstructured, and Hugging Face Transformers to analyze documents and extract entities, relations, and embeddings.
• Build and optimize a semantic relation extraction mechanism using rule-based and ML-driven approaches.
• Integrate embeddings (SentenceTransformers) and vector databases (Qdrant).
• Construct and manage a scalable Knowledge Graph (Dgraph) to represent semantic relationships and facilitate explainability.
• Design and implement highly scalable, multi-threaded Python applications.
• Integrate message streaming services (Kafka) for real-time processing and communication between system components.
• Collaborate closely with the product team to align technical solutions with business requirements.
• Maintain a high standard of code quality, testing, documentation, and continuous integration/deployment.

Required Skills and Qualifications:
• 3+ years of experience in NLP, machine learning, and 6+ years of software engineering.
• Strong proficiency in Python (expert-level).
• Deep understanding of multi-threading, parallel processing, and performance optimization in Python.
• Hands-on experience with NLP libraries and frameworks: spaCy, Hugging Face Transformers, LangChain.
• Experience with semantic search techniques, embeddings (SentenceTransformers), and vector databases (Qdrant, Pinecone, Weaviate).
• Familiarity with graph databases (Dgraph, Neo4j) and knowledge graph concepts.
• Understanding of Large Language Models (GPT, Claude) and their integration into production environments.
• Experience with Kafka or similar message streaming platforms.
• Strong algorithmic skills, logical thinking, quick learning abilities, and creativity in generating new ideas.
• Excellent problem-solving skills, attention to detail, and ability to work independently.
• Hardworking!!!, proactive attitude, and ability to thrive in a fast-paced environment.
• Strong communication skills and good command of English.

Preferred Qualifications:
• Experience deploying AI models and services in cloud environments (AWS, GCP, Azure).
• Familiarity with Docker, Kubernetes, and modern CI/CD practices.
• Previous experience with transportation, logistics, legal tech, hr, or compliance domains is a plus.

What We Offer:
• Opportunity to work on innovative, real-world AI applications.
• Flexible working conditions, including remote work possibilities.

Join us in building next-generation AI-driven knowledge solutions! 

At VARTEQ, we’re not just building features — we’re engineering a scalable ecosystem.
Join our team and help us evolve our internal PHP-based framework, powering custom solutions in EdTech and beyond. This is an opportunity to work at the foundation level of a fast-growing platform (learn more at festi.io) and contribute to the quality assurance of architecture that supports multiple systems across industries.

Responsibilities:

• Conduct thorough manual testing of our web, API and mobile application to identify bugs and issues
• Develop and execute test cases based on product requirements and user stories, ensuring all functionalities meet our high standards of quality
• Collaborate with the development team to prioritize bug fixes and manage the lifecycle of each issue
• Provide feedback to our design and development teams on potential improvements from a user perspective, emphasizing engagement and ease of use
• Maintain documentation of test cases, results, and any other quality assurance activities

• Participate in product design reviews to provide input on potential quality, reliability, and maintenance issues

   

Skills:

• 1+ years of practical work experience in a commercial setting
• Solid understanding of basic development processes
• Familiarity with HTML/CSS and API concepts
• Good understanding and experience in cross-browser compatibility
• Experience in testing web/mobile applications and UI/UX testing
• Basic knowledge of SQL queries
• Proficient use of bug-tracking systems for effective issue resolution

• English: B2 or higher proficiency in English

   

What We offer:

• Dynamic environment with a low level of bureaucracy
• Challenging tasks and opportunity to be part of a leading platform in the education sector
• Education path: boost your skills and knowledge with our regular internal events (trainings, workshops, etc), language courses, and company-paid certifications
• Growth environment: share your experience and level up your expertise with a community of skilled professionals, locally and globally
• Paid vacation, holiday,s and sick leaves

You’ll join a core team working on the SEPA Instant integration The job involves developing a dedicated microservice in Golang, processing real-time payments using RabbitMQ (AMQP over TLS) and Kafka, handling complex ISO 20022 XML message formats — all in a multi-tenant, scalable architecture.

Requirements:

Core Skills:

 • Strong experience in Golang development: clean, modular, idiomatic code (5+ years of experience)

 • Familiarity with Go concurrency patterns (goroutines, channels)

 • Experience in building microservices

Integration & Messaging:

 • RabbitMQ (AMQP over TLS), TLS certificate handling, retry mechanisms, dead-letter queues

 • Kafka: producing, consuming, offset management, at-least-once delivery

 • ISO 20022 XML processing and working with XSD schemas

Testing:

 • Writing unit tests (≥80% coverage) and integration tests with RabbitMQ and Kafka mocks

 • Experience with Testify, GoMock, or Mockery

 • Load testing experience (k6, Locust) is a plus

DevOps / Runtime:

 • Docker and Docker Swarm: creating and managing replicated services, health checks

 • Working with TLS (1.2+), HashiCorp Vault for secrets management

 • Supporting rolling updates and fast service startup (<5 seconds)

API & Security:

 • REST API development and documentation (Swagger/OpenAPI)

 • Familiarity with Go frameworks: chi, gin, echo

 • OAuth2 client credentials flow and JWT token validation

Architectural Understanding:

 • Microservices and event-driven architecture

 • Multi-tenant environment awareness (tenant isolation)

Tools & Workflow:

 • Git (GitHub/GitLab/Bitbucket)

 • CI/CD pipelines for testing, linting, and deployment

Key Responsibilities

 • Develop and maintain Golang microservices for SEPA Instant (EKS) integration using RabbitMQ and Kafka

 • Process ISO 20022 XML messages, supporting dynamic handling of multiple XSD schemas

 • Ensure secure data exchange via TLS with dynamic certificate reloading

 • Implement retry logic and dead-letter queue handling for message errors

 • Write unit and integration tests, contribute to CI/CD pipeline development

 • Collaborate with DevOps for deployment and maintenance of Docker Swarm services

 • Optimize system performance and ensure high availability

 • Document APIs and services

Project Overview

An innovative Connector-as-a-Service platform that changes the way financial institutions integrate with leading payment clearing systems such as SEPA Instant and Mastercard. The platform makes complex processes simple - providing fast and reliable access to payment systems through a single API, accelerating customer onboarding and opening up new monetization opportunities.