Jobs at Djinni

We work with iGaming operators of all sizes to help them expand into new markets or strengthen their existing brands. As a casino software company, we provide solutions that help build outstanding brands and achieve business goals. Now, we are looking for a Senior DevOps Engineer to join our team.
 
What will be your responsibilities:
 

• Design, build, and optimize high-load, highly available server-side platforms (Nginx, PHP-FPM, MySQL, Redis, message queues).
•  • Architect and maintain Kubernetes-based platforms and containerized workloads (Docker, Helm, GitOps).
•  • Design and operate secure network infrastructure:
•  – firewalls (iptables, UFW, security groups, NACLs)
•  – reverse proxies and L7/L4 load balancers
•  • Implement DDoS protection and WAF strategies (Cloudflare, rate-limiting, bot protection).
•  • Build and maintain observability stack:
•  – metrics (VictoriaMetrics, Prometheus)
•  – APM (New Relic, OpenTelemetry)
•  – centralized logging and alerting
•  • Design, implement and continuously improve CI/CD pipelines (Jenkins, GitHub Actions).
•  • Automate infrastructure and platform lifecycle using IaC and configuration management.
•  • Participate in architecture design, reliability engineering and capacity planning.
•  • Ensure security, compliance and audit readiness (PCI DSS, secrets management, access control).

 
What we expect from you:
 

• Strong hands-on Linux expertise (Debian, Ubuntu, systemd, networking, performance tuning).
• • Deep experience with AWS:
•  – compute (EC2, ASG, EKS)
•  – networking (VPC, LB, peering)
•  – managed databases (RDS Aurora)
•  – messaging (SQS, Kafka).
•  • Strong database operations knowledge: MySQL HA, replication, backup.
•  • Production experience with Kubernetes (cluster architecture, HA, upgrades, disaster recovery).
•  • Advanced CI/CD experience: Jenkins, GitHub Actions, GitOps practices.
•  • Strong Cloudflare expertise: DNS, CDN, WAF, DDoS protection.
•  • Infrastructure as Code: Terraform (mandatory), Ansible (configuration and automation).
•  • Scripting and automation in Bash and Python.
•  • Solid understanding of networking and security fundamentals (TLS, IAM, VPN, firewalling, zero-trust).
•  • Experience working in regulated environments or with security standards (PCI DSS is a plus).

 
What we offer:
 

We believe that a happy team builds the best products. Here is how we support you:
 

• Remote & Flexible: Work from anywhere. Our core hours are 10:00 to 18:00 (Kyiv time), Mon-Fri.
• Financial Stability: Timely payment for compensation for services
• Personal Equipment Policy: equipment are provided for use to ensure comfortable and efficient work.
• Knowledge Sharing: We regularly gather to discuss new trends, share insights, and elevate one another.
• Community: At NuxGame, you will work in a team of like-minded people who are ready to support, inspire, and tackle complex challenges together.
• Creative Freedom: We encourage initiative. With us, you have the freedom of professional expression and the space to implement your ideas.
• Time-off Policy: 24 vacation days per year + 5 sick days (without medical confirmation).
• Atmosphere: A friendly environment focused on results and mutual respect, free from unnecessary bureaucracy and pressure.

We believe in unlocking the inner potential of each team member within an open and democratic culture.

Waiting for you on our team!

We are looking for an experienced Data Engineer to design and maintain robust data infrastructure across our systems. In this role, you will be responsible for building scalable data pipelines, ensuring data integrity, and integrating third-party data sources. Your primary focus will be to enable efficient data flow and support analytical capabilities across the organization. You will also contribute to the development of our data architecture, implement best engineering practices, and collaborate closely with cross-functional teams to turn raw data into actionable insights.

Requirements

• 3+ years of commercial experience in Data Engineering
• Experience gathering business requirements and communicating with stakeholders
• Strong knowledge of Data Warehouse (DWH) architecture and principles
• Hands-on experience designing data warehouses and building ETL pipelines
• Deep practical experience with Python
• Hands-on experience in one or more of the following areas: data processing using PySpark, Apache Spark, Pandas, or similar frameworks; data scraping; integration of third-party data sources and APIs
• Proficiency in SQL and relational databases such as PostgreSQL and MySQL
• Hands-on experience with column-oriented databases such ClickHouse, Snowflake, Cassandra, BigQuery (many tables with millions of records and above each)
• Solid understanding of software design patterns, algorithms, and data structures
• Intermediate English proficiency

Will be a plus

• Experience with messaging platforms such as RabbitMQ or Kafka
• Familiarity with DataOps practices and data pipeline automation
• Familiarity with CI/CD pipelines and Kubernetes environments
• Background in FinTech or Trading domains

Responsibilities

• Communicate with technical and non-technical stakeholders to gather and clarify business requirements
• Review and analyze data and business logic to ensure consistency, accuracy, and reliability
• Design, implement, and maintain data pipelines for efficient and scalable data processing
• Integrate, maintain, and support data solutions and third-party data sources
• Research and evaluate third-party tools, services, and components for potential use
• Follow engineering best practices, including code reviews, testing, refactoring, and continuous delivery
• Design, optimize, and maintain data storage solutions

What we offer:

• Tax expenses coverage for private entrepreneurs in Ukraine
• Expert support and guidance for Ukrainian private entrepreneurs
• 20 paid vacation days per year
• 10 paid sick leave days per year
• Public holidays as per the company’s approved Public holiday list
• Medical insurance
• Opportunity to work remotely
• Professional education budget
• Language learning budget
• Wellness budget (gym membership, sports gear and related expenses)

Responsibilities:

- Full-stack development (frontend + backend) on PHP Laravel

- Feature development per the roadmap

- Bug fixing

- Unit and integration tests

- Building new services for the Transformation Squad

- Code review, estimation, and sprint planning

- Collaboration with QA, DevOps, Tech Lead, and Product Owner

Requirements:

- 4+ years of commercial PHP experience, 3+ years with Laravel

- Fullstack development experience

- Strong MySQL knowledge

- REST API experience

- Understanding of clean code, SOLID principles, and design patterns

- English B1+

Nice to have:

- Couchbase/Redis/MongoDB

- RabbitMQ/Pub-Sub event-driven architecture

- GCP

- Monolith-to-microservices transition experience

- E-commerce/marketplace experience

- Frontend frameworks on Laravel (Vue.js, Livewire)

We are looking for a Senior Manual QA Engineer (Desktop macOS) to join our PDF Expert team. You’ll help ensure the quality and reliability of a product used by millions of people, working closely with developers and the product team to test new features and improve the overall user experience.

What you'll do:

• Own end-to-end QA for PDF Expert iOS/Mac/Web releases - plan and run release testing so every version ships on time, bug-free in covered scenarios.
• Build and maintain test plans, test runs, and test cases in QA Sphere covering the app's key user flows, keeping them current to avoid hotfixes.
• Drive post-release quality - monitor customer issues (Helpspot) and crashes (AppCenter), triage and close resolutions in Jira.
• Ensure PDF Expert's key dependencies - pdfexpert.com and the checkout flow - work as expected for customers.
• Help maintain the quality bar for AI-powered features in the app.
• Partner with Product, Design, and Engineering across planning, grooming, and design reviews, surfacing risks early and contributing to strategy.
• Drive continuous improvement of QA processes by reviewing teammates' test cases/runs and proposing improvements.

About you:

• 2+ years of hands-on manual QA experience, ideally with native mobile/desktop apps (iOS/macOS).
• Strong test design skills - writing clear test plans, test cases, and test runs (experience with QA Sphere or similar tools is a plus).
• Solid grounding in QA fundamentals: functional, UI/UX, regression, and localization testing.
• Proven experience owning release testing and sign-off before shipping to customers.
• Practical experience with Jira (or similar) for tracking, prioritizing, and closing bugs.
• Strong attention to detail combined with the ability to estimate testing effort accurately.
• English at B2 level or higher, for clear collaboration with Product, Design, and Dev.

Would be a plus:

• Experience testing subscription, checkout, or in-app purchase flows, ideally with Stripe or PayPal.
• Familiarity with crash-reporting/analytics tools (e.g., Firebase) and customer support platforms (e.g., Helpspot).
• Basic understanding of security and privacy testing principles.
• Exposure to testing AI-powered features or LLM-based functionality.
• Familiarity with Figma or similar tools for reviewing designs.
• Experience testing the same product across multiple platforms (iOS, macOS, Web).
• Experience reviewing or mentoring on test cases/test runs written by other QA engineers.

What you will get at Readdle:

• Customer-centric culture. We put our users at the heart of everything we do. Every team member has the opportunity to engage directly with customers, gaining insights that shape meaningful, delightful experiences for millions worldwide.
• Relentless growth. We’re committed to mastery in our craft. We take ownership of our work, decisions, and outcomes, and we see feedback as a catalyst for growth. Every challenge is an opportunity to learn, evolve, and raise the bar.
• Exceptional people, exceptional team. Our greatest strength is our people. We care deeply about each other, work transparently, and celebrate collective success. Together, we build an environment where everyone can do their best work and grow beyond their potential.
• Real impact. We design products that truly matter. Our focus is on delivering tangible value, simplifying complexity, pushing boundaries, and continuously improving how we build and deliver solutions to our users.
• Culture of innovation. We embrace curiosity and creativity in everything we do. Fresh ideas are not just welcomed, they’re expected, celebrated, and turned into real innovations that shape the future of our products and company.

Company overview:
 

Graphio.ai stops revenue loss before it happens by detecting broken handoffs between teams.
 

We analyze API-enabled metadata from your existing systems to automatically identify when Sales, Customer Success, Legal, Finance, Product, and Operations are misaligned - before deals stall, renewals fail, or contracts slip.
 

No workflow changes. Fast rollout in less than 2 days.

AI learns what successful execution looks like in your company and alerts you to dangerous deviations in real time.

We’ve built and scaled before: the team behind Graphio.ai previously built upSWOT, a B2B platform adopted by hundreds of financial institutions, which was later acquired by Uptiq.  We’re applying those lessons in execution, delivery, and scale to Graphio.ai.

Supported by senior leaders from Experian, Mastercard, Lattice, BambooHR, Altrata, SAP, JackHenry, FIS, Pfizer, Workday, Customertimes, and more (graphio.ai/investors).

Position Overview:

We are looking for a Junior/Middle Backend Developer to help build and maintain the backend services that power Graphio.ai’s workflow intelligence product.

In this role, you will work on C# / .NET–based APIs and backend services that support customer onboarding (workspace setup and invites), system integrations, metadata ingestion and processing, and generation of user-facing outputs such as weekly/monthly reports and alerts.

You will join a small team where shipping, reliability, and clean engineering practices matter. This is a role for someone who wants to grow fast by working on real production systems, with support from senior engineers and clear technical direction.

Key Responsibilities:

• Build and maintain backend services and REST APIs using C# / .NET (ASP.NET Core) that powers core Graphio.ai flows: workspace setup, user access, system integrations, metadata ingestion, reporting, and alert delivery.
• Write clean, maintainable code and follow team standards; contribute to refactoring and long-term code health when needed.
• Work on ingestion and processing of metadata (events, entities, timestamps, identifiers) used for workflow intelligence and reporting.
• Design and implement asynchronous and event-driven processes using RabbitMQ (queues, background jobs, retries, idempotency).
• Improve API reliability and performance: clear contracts, consistent error handling, pagination, and rate limiting.
• Work with databases:
  • MongoDB for operational and metadata storage,
  • ClickHouse for analytics, aggregations, and reporting workloads.
• Write and optimize queries, design schemas and indexes, participate in migrations, and help ensure data integrity and consistency.
• Implement authentication, authorization, and secure-by-default practices (permissions, tenant boundaries, safe handling of sensitive data).
• Write unit and integration tests; participate in code reviews and apply feedback quickly.
• Monitor and troubleshoot services in production: use logs, metrics, and tracing; contribute to root-cause fixes.
• Document backend services and APIs: how they work, how to run locally, and how to debug common issues.
• Contribute to engineering workflows: Git-based collaboration, containerized development (Docker), and CI/CD practices.
• Collaborate with Product, Frontend, and Engineering peers to deliver features in small, shippable increments in a remote environment.

Required Qualifications:

• 1–2 years of backend development experience (or equivalent production experience through projects).
• Strong knowledge of C# and .NET (ASP.NET Core, Web API).
• Experience building REST APIs, including authentication, authorization, error handling, pagination, and versioning.
• Hands-on experience with MongoDB: schema design, indexes, aggregations, and query optimization.
• Understanding of analytical databases; experience with or willingness to learn ClickHouse (aggregations, partitioning, performance tuning).
• Experience with message queues and background processing; RabbitMQ is a strong plus.
• Understanding of asynchronous processing, eventual consistency, and retry mechanisms.
• Knowledge of secure engineering basics (auth, permissions, data protection).
• Comfortable working in a remote team: clear written communication, ownership of tasks, and predictable delivery.

Nice to Have:

• Experience building event-driven architectures and data pipelines.
• Experience working with large datasets and performance optimization.
• Familiarity with observability tools (logging, metrics, tracing).
• Startup experience or proven ability to move fast without heavy process.
• Experience with Kubernetes or cloud platforms (AWS, GCP, Azure).

What we offer:

• A practical growth role on real backend services used by customers, with clear feedback and mentorship from senior engineers.
• Work on meaningful product flows: metadata processing, workflow intelligence outputs, and reporting/alerts.
• A startup environment with low bureaucracy and fast iteration - you ship, learn, and improve quickly.
• Remote-friendly team with a simple setup and high trust.
• Competitive compensation (based on level) and growth opportunities as the team scales.

Company Operating Requirements:

At Graphio.ai we run a high-ownership, mission-driven team with clear operating rules. Please read these carefully before applying:

• LinkedIn profile is required (company policy). Employees are required to keep a current LinkedIn profile that shows their Graphio.ai position and is linked to the official Graphio.ai company page (company logo visible on the profile). Profile standards are provided during onboarding.
• Synchronized team vacations. The team takes coordinated time off four times per year to keep planning aligned and reduce context switching. Dates are announced in advance.
• Startup constraints. Vacation timing may be restricted during critical company periods. We plan time off as a team and communicate constraints early.
• Relocation readiness. Team members may reside in Ukraine, but must be prepared to relocate with their families to Europe or the United States if the company requests it and it becomes legally possible. Any relocation would be discussed in advance.
• Non-standard schedule. The role requires flexibility to collaborate across time zones. This may occasionally include early/late meetings depending on customer and team needs.
• Zero slow offboarding. We run lean and fast. When the fit isn’t there, we act quickly: employment may be ended within a day and access is removed immediately.

Application requirement: short intro video (required):

Please include a short self-introduction video (2–5 minutes). You can add the link directly to your resume or submit it through the hiring platform in any available way (YouTube, Loom, Google Drive, or similar).

• No need for a polished production, a simple smartphone recording is perfectly fine.
• This does not replace live conversations, it only helps us speed up the first screening and understand your communication style and motivation.
• In the video, please cover:
  • Who you are and 2–3 measurable outcomes you delivered in recent roles
  • Why you are applying for this role at Graphio.ai
  • Why you are leaving or have left your previous role
  • Your view on how a high-ownership startup team should operate (pace, ownership, communication, and work-life balance expectations)
• Applications without the video may not be reviewed.

Final note:

Graphio.ai is not a 9-to-5 corporate environment. We move fast, operate with high ownership, and expect proactive execution without micromanagement. Graphio.ai is a strong fit for people who actively seek challenges for personal growth - especially those who want to build their own company one day and see this as a place to learn how high-performing startups execute.