Jobs at Djinni

Employment: Full-time
Work Format: Remote

About the Company

We are a technology startup operating in the Data Infrastructure and Cloud Analytics domain. We are developing a platform that helps companies optimize analytical query execution by automatically selecting the most efficient database or query engine based on speed, cost, and performance.

Our product brings together modern database technologies, cloud platforms, and distributed systems to make large-scale data processing faster and more efficient.

About the Role

We are looking for a Backend / Data Infrastructure Engineer to join the development of our product's core architecture.

You will work at the intersection of Backend Development, Database Technologies, and Distributed Systems, building solutions that integrate different data processing systems and optimize analytical query execution.

This role is a good fit for an engineer who is interested not only in traditional data processing workflows but also in database internals, query architecture, and distributed infrastructure.

Key Responsibilities

• Develop and maintain backend services and APIs for interacting with different databases and query engines.
• Build and improve integrations with Snowflake, DuckDB, Trino, ClickHouse, BigQuery, and other systems.
• Develop mechanisms for SQL query routing, execution, and optimization across different query engines.
• Work with SQL parsing, logical query plans, and SQL dialect transformations.
• Ensure data consistency and result accuracy when executing queries across different systems.
• Work with data storage technologies, including Apache Iceberg.
• Develop automated benchmarking tools to test and compare different query engines in terms of execution speed, throughput, and cost.
• Improve the platform's reliability, scalability, and performance.

Requirements

• Practical experience in Software Engineering or Backend Development.
• Commercial development experience with Python; experience with Rust is also a plus.
• Experience working with databases, data warehouses, or analytical platforms.
• Understanding of SQL and database architecture.
• Hands-on experience with distributed systems.
• Understanding of SQL query optimization principles and database performance tuning.
• Understanding of ETL processes and data modeling.
• Experience developing APIs, integrations, or connectors for working with different systems.

Nice to Have

• Experience with Snowflake, BigQuery, Databricks, DuckDB, Trino, or ClickHouse.
• Experience with SQLGlot, Apache Calcite, Substrait, or SQL parsers.
• Understanding of Query Federation, Query Routing, and Query Pushdown.
• Experience with JDBC/ODBC, database connectors, or data migration between different systems.
• Knowledge of Apache Iceberg, Delta Lake, or Apache Hudi.
• Experience with data consistency validation and cross-database result comparison.
• Contributions to open-source projects in the Data Infrastructure domain.
• Experience working in early-stage startups.

We’re looking for an experienced Software Test Engineer / Test Automation Engineer to help build and evolve a test platform for a manufacturing client. This isn’t a test-case-writing role. You’ll actively shape the architecture, setup and growth of the test framework together with the team.

• Start: ASAP
• Workload: 100%
• Location: 90% remote, 2 days per month on-site in the Düsseldorf/Wuppertal area (travel costs reimbursed)
• Industry: manufacturing

• Language: English required (C1 or higher), German is a plus

   

What you’ll do

• Support a device app platform initiative, focusing on structuring and evolving the testing of generic platform components
• Separate the app tests from the current test environment to create a clearer, more scalable test approach
• Contribute actively to a new QEMU-based test framework that is currently in development
• Build and optimise test frameworks and test environments, including HIL/SIL test setups

What you bring

• 5+ years of professional experience in software testing and test automation
• Strong hands-on experience in Qt-based environments and GUI testing
• Squish for GUI test automation
• Robot Framework and Python
• Docker, Kubernetes and Linux
• QEMU
• HIL/SIL test benches and Jenkins
• Proven experience setting up and optimising test environments and automation solutions
• A proactive, communicative, team-oriented way of working
• Experience in international project teams

Location: Vienna, Austria (Hybrid – primarily remote, with onsite presence in Vienna approximately once a month)

Engagement: 12 months initially, with a possibility of extension

Start Date: January 2027

About the Position

We are looking for a Senior Tableau Reporting Expert to join a long-term strategic analytics initiative focused on expanding enterprise-wide reporting and management analytics capabilities.

In this role, you will be responsible for designing, developing, and maintaining complex analytical dashboards, transforming business requirements into effective reporting solutions, and ensuring consistent and reliable reporting logic across the organization.

You will work closely with business stakeholders, Finance, Controlling, and IT teams to deliver high-quality analytical solutions that support data-driven decision-making.

What You’ll Do

- Design, develop, and maintain complex analytical dashboards and reports using Tableau.

- Create, manage, and optimize Tableau data sources.

- Translate business requirements into effective reporting solutions.

- Define and implement KPIs, metrics, calculations, and visualizations.

- Ensure consistency, accuracy, and reliability of reporting logic.

- Optimize dashboard performance and improve the overall user experience.

- Support dashboard testing, deployment, and user adoption.

- Collaborate with business stakeholders, Finance, Controlling, and IT teams.

- Work with large-scale analytical datasets to deliver meaningful business insights.

Requirements

- 4+ years of relevant experience in Tableau reporting and dashboard development.

- Strong hands-on experience with Tableau Desktop and Tableau Server or Tableau Cloud.

- Proven experience developing complex analytical dashboards and reports.

- Advanced SQL skills.

- Experience working with large-scale analytical datasets.

- Strong understanding of data visualization principles and reporting best practices.

- Experience working in Agile/Scrum environments.

- Good English communication skills.

- Ability to understand business needs and translate them into technical reporting solutions.

Nice to Have

- Experience working with Databricks as a reporting backend.

- Background in Banking, Finance, or Controlling.

- Experience supporting enterprise-wide reporting and management analytics initiatives.

What We Offer

- Paid vacation and sick leave

- We provide the equipment you need to work comfortably (if required)

- We cover 50% of courses if you want to grow professionally

- Regular salary reviews based on your performance

- Competitive salary, depending on your experience

- Always on-time payments — no delays

- A normal, supportive team without unnecessary bureaucracy

Project Description

Harmonic is the worldwide leader in virtualized broadband solutions. We revolutionized broadband networking via the industry’s first virtualized broadband solution, enabling cable operators to more flexibly deploy gigabit internet service to consumers’ homes and mobile devices.

Job Description

- B.Sc. in Industrial Engineering, Information Systems, Computer Science, Engineering, or equivalent.
- 5+ years of experience as an Atlassian expert (full-time support of Jira, Confluence and Bitbucket DC/Cloud) in large organizations.
- Understanding of system administration principles (Monitoring, Network, Storage, Scripting).
- Strong and confident experience with ScriptRunner for Jira, including extensive use of Listeners, Scripted Fields, Behaviors, and Fragments at an advanced level (working with all kinds of Jira Software, Issues, Issue Links, Directory, APIs, etc.).
- Extensive knowledge of project management/administration, permissions, workflows complex customizations, UI elements.
- Advantage: Extensive knowledge of eazyBI Reports and Charts for Jira, with the ability to develop new MDX queries, provide a wide range of new formulas to develop KPI, SLA, Agile, productivity, and prediction reports, and manage several eazyBI accounts with different permission ranges.
- Ability to work independently and solve problems with speed and efficiency, taking responsibility for the results.
- Ability to balance user requests and business needs against established best practices.
- Ability to collaborate with technical and non-technical teams to optimize workflows.
- Strong communication skills (verbal and written), time management skills, fast learner, and self-motivated.
- Advanced verbal and written English skills – Mandatory.

Job Responsibilities

- Maintain and administer various Atlassian tools used by the organization (Jira DC and Cloud, JSM Cloud, Confluence Cloud, Bitbucket DC, and OpsGenie).
- Maintain the AWS infrastructure for our DC Atlassian products.
- Provide support and advanced troubleshooting for the entire user base.
- Partner with cross-functional teams to design and implement solutions that empower their day-to-day work while adhering to industry best practices.
- Manage user permissions according to the needs of spaces and teams.
- Serve as a trusted escalation point for our services team and customers.
- Design, document, and implement advanced scripts (Groovy/Java, ScriptRunner, Automation for Jira, etc.) and perform meaningful code reviews for your peers.
- Develop new ScriptRunner scripts or update/optimize/fix existing ones.

We are looking for an experienced Unity Technical Artist to help improve the visual quality and overall presentation of an existing 3D farming game designed for web browsers.

The main goal is to make the game look more polished, attractive, and visually consistent while ensuring smooth performance and efficient resource usage in a browser environment.

Responsibilities:

• Improve the visual quality of existing 3D assets, materials, and textures.
• Enhance lighting, shadows, and environmental visuals.
• Improve the overall look and feel of the game while maintaining its existing art direction.
• Optimize materials, shaders, textures, and rendering settings for WebGL.
• Identify visual and technical bottlenecks affecting browser performance.
• Suggest improvements to the environment, atmosphere, and visual presentation.
• Balance visual quality with performance to ensure smooth gameplay across different devices.

Requirements:

• Strong experience with Unity and Technical Art.
• Experience optimizing 3D games for WebGL and browser environments.
• Good understanding of lighting, materials, shaders, textures, and rendering pipelines.
• Experience with 3D environment art and visual polishing.
• Understanding of performance optimization, draw calls, batching, texture memory, and GPU limitations.
• Ability to evaluate existing projects and suggest practical visual and technical improvements.

Nice to Have:

• Experience with farming, simulation, or casual games.
• Strong artistic sense and understanding of environment composition.
• Experience improving the visuals of existing games without completely rebuilding their assets.

Project Scope:

This is an existing game, so the focus is on improving and polishing what is already there rather than creating everything from scratch. We are also open to your suggestions on how to make the game more visually appealing and technically efficient.

To Apply:

Please share examples of Unity projects where you worked on visual improvements, environment art, lighting, materials, or WebGL optimization. Briefly describe how you would approach improving the visuals and performance of an existing 3D browser game.

You are our ideal candidate if you:

• Have English proficiency at B1+ level or higher;
• Speak Czech fluently or at a native level;
• Have strong communication skills and are willing to learn, grow, and quickly absorb new information;
• Previous experience in customer support or sales will be considered an advantage.

What will you be responsible for?

• Handle complex requests from fleet partners and drivers, ensuring timely and accurate resolution;
• Collaborate with cross-functional teams (Technical Support, Billing, Customer Support, etc.) to investigate and resolve operational issues;
• Review driver and partner profiles, earnings, and account activity to identify discrepancies and support issue resolution;
• Attend meetings with fleet partners, document key outcomes, and follow up on action items;
• Maintain, update, and analyze operational reports to support the team's daily activities;
• Provide operational support to Fleet Specialists and assist with ad hoc projects and administrative tasks;
• Contribute to process improvements by identifying inefficiencies and suggesting practical solutions.
•  

What do we offer?

• Paid training;
• Stable and timely income (base salary + performance-based bonus tied to real KPIs);

• Career growth opportunities (development within the project as well as in other structural departments of the company);

   

ll partner with engineering teams globally to improve the reliability, scalability, and operational excellence of our cloud platform.
As a Senior SRE, you'll lead engineering-driven reliability initiatives by building automation, improving deployment processes, advancing observability, and driving operational excellence across our production environment.

Responsibilities
 

• Reliability Engineering – Design and implement solutions that improve the reliability, availability, and scalability of our production platform while proactively identifying and eliminating operational risks.
• Automation & Platform Engineering – Build internal tools and automation that eliminate manual operational work, improve engineering productivity, and streamline production workflows.
• Observability – Improve monitoring, alerting, dashboards, and production visibility while driving initiatives that reduce alert fatigue, improve incident detection, and strengthen operational insights.
• Production Rollouts – Design, improve, and support production deployment processes using modern release strategies such as Canary, Blue/Green, and Feature Flags to ensure safe and reliable releases.
• Production Reliability & Incident Response – Lead the investigation and resolution of critical production incidents, perform root cause analysis, and implement long-term preventive improvements that improve platform resilience and reduce recurring issues.
• On-Call & Operational Excellence – Participate in the team's on-call rotation, ensuring reliable production operations. Respond to critical incidents, collaborate with engineering teams during service disruptions, and drive engineering improvements, automation, and operational best practices that reduce operational toil and prevent future incidents.
• Cloud & Infrastructure – Design, maintain, and improve our Kubernetes-based cloud platform, CI/CD pipelines, and production infrastructure running on GCP and AWS.
• Engineering Partnership – Collaborate closely with Software Engineers, DevOps, DBAs, and Product teams to improve reliability across the software development lifecycle and promote SRE best practices.
   

Requirements
 

• 5+ years of experience in Site Reliability Engineering, Platform Engineering, DevOps, or Infrastructure Engineering.
• Hands-on experience operating Kubernetes in production environments.
• Strong experience working with public cloud platforms (GCP or AWS).
• Strong programming and scripting skills (Python preferred; Go or Bash are a plus).
• Experience designing and building automation and internal engineering tools.
• Experience working with CI/CD pipelines and modern deployment methodologies.
• Hands-on experience with observability platforms such as Datadog, Prometheus, or Grafana.
• Strong understanding of Linux, networking, distributed systems, and cloud-native architectures.
• Excellent troubleshooting, debugging, and root cause analysis skills.
• Strong communication skills and experience collaborating with globally distributed engineering teams.
   

Advantages
 

• Experience with Infrastructure as Code (Terraform, Ansible, etc.).
• Experience with messaging and distributed technologies such as Kafka, Pub/Sub, or Redis.
• Experience supporting modern deployment strategies such as Canary, Blue/Green, or Feature Flags.
• Familiarity with OpenTelemetry and modern observability tooling.
• Understanding of Site Reliability Engineering principles, including SLIs, SLOs, and error budgets.
• Experience working in large-scale SaaS production environments.
• Relevant cloud or Kubernetes certifications (GCP, AWS, CKA, CKAD).
  
  Why Join Us?
  Join a team where Site Reliability Engineering is treated as an engineering discipline—not just an operations function. You'll work on large-scale cloud infrastructure serving enterprise customers while building automation, improving observability, and enabling engineering teams to deliver software safely and reliably.
• You'll collaborate with a global SRE organization using modern cloud-native technologies, Kubernetes, distributed systems, and large-scale SaaS workloads. You'll have the opportunity to lead impactful reliability initiatives, influence engineering best practices, and solve complex production challenges that directly improve the experience of both customers and engineering teams.

We’re a fast-growing outsourcing IT company that’s been around for 13 years, and we’re on the lookout for a Scrum Master for a long-term product-driven project.

You’ll be joining a multi-team Smart City software ecosystem built for the Middle East market. It’s a fully agile product-driven setup, with real users and real impact.

You’ll work mostly on the team level with 2–3 cross-functional Scrum teams, helping them stay focused, deliver value, and continuously improve. If you enjoy empowering teams and love seeing progress happen, let’s talk! 

Requirements:

• 3+ years of proven experience as a Project Manager or Scrum Master in a software development environment, including at least 2 years specifically as a Scrum Master in product teams.
• Hands-on facilitation, mentoring, and coaching skills.
• Solid knowledge of Agile approaches and frameworks (Scrum, Kanban) and the ability to apply them pragmatically.
• Experience working with multiple teams simultaneously.
• Experience with team and process metrics (including delivery metrics).
• Understanding of software development lifecycle and delivery principles.
• Understanding of modern engineering culture and practices (e.g., CI/CD, test automation, DevOps culture, feature flags, pair programming, etc) and ability to support their adoption within teams.
• Practical experience in change management.
• Strong systems thinking, empathy, active listening, and critical thinking.
• Ability to explain complex concepts simply and clearly.
• Proficiency with project management software and tools.
• Problem-solving skills and the ability to adapt to changing circumstances.

Nice to have:

• Agile certifications (PSM, KMP, etc.)
• Understanding of change management in complex environments.
• Experience with scaling frameworks (LeSS, Nexus, etc.)
• Experience working in a project-based environment

Responsibilities:

• Analyze current team processes and build a roadmap for improvement.
• Define and track team/process/delivery metrics and visualize progress.
• Coach and mentor teams to foster growth, autonomy, and self-management.
• Collaborate with the Product Owner to improve backlog refinement and goal-setting processes.
• Identify risks and remove impediments, including dependencies and bottlenecks.
• Support cross-team collaboration and communication with stakeholders.
• Facilitate team events: Daily Scrums, Sprint Planning, Reviews, Retrospectives – while empowering teams to lead these sessions themselves.
• Promote a healthy team dynamic, facilitate conflict resolution, and monitor team health via observation and 1:1s.
• Mentor teams on Agile practices, Definition of Done, and effective tooling.
• Encourage and support the adoption of strong engineering practices like continuous delivery, use of feature flags, test automation, clean code, frequent refactoring, and fast feedback loops to help teams deliver high-quality, reliable software.
• Lead internal workshops/trainings on Agile techniques and tools.
• Ensure transparency through effective visualization (e.g., product goals, sprint targets, metrics).
• Work with PO and stakeholders on roadmap communication and sprint-to-product goal alignment.
• Continuously improve the Product Backlog Refinement process:
• Teach effective PBI creation and splitting techniques
• Support technical task prioritization
• Ensure backlog clarity, order, and visibility

What We Offer:

• Competitive salary
• Loyal, open-minded management and the ability to influence decision-making
• A collaborative and innovative environment with room for professional growth

We’re a fast-growing outsourcing IT company that’s been around for 13 years, and we’re on the lookout for a Scrum Master for a long-term product-driven project.

You’ll be joining a multi-team Smart City software ecosystem built for the Middle East market. It’s a fully agile product-driven setup, with real users and real impact.

You’ll work mostly on the team level with 2–3 cross-functional Scrum teams, helping them stay focused, deliver value, and continuously improve. If you enjoy empowering teams and love seeing progress happen, let’s talk! 

Requirements:

• 3+ years of proven experience as a Project Manager or Scrum Master in a software development environment, including at least 2 years specifically as a Scrum Master in product teams.
• Hands-on facilitation, mentoring, and coaching skills.
• Solid knowledge of Agile approaches and frameworks (Scrum, Kanban) and the ability to apply them pragmatically.
• Experience working with multiple teams simultaneously.
• Experience with team and process metrics (including delivery metrics).
• Understanding of software development lifecycle and delivery principles.
• Understanding of modern engineering culture and practices (e.g., CI/CD, test automation, DevOps culture, feature flags, pair programming, etc) and ability to support their adoption within teams.
• Practical experience in change management.
• Strong systems thinking, empathy, active listening, and critical thinking.
• Ability to explain complex concepts simply and clearly.
• Proficiency with project management software and tools.
• Problem-solving skills and the ability to adapt to changing circumstances.

Nice to have:

• Agile certifications (PSM, KMP, etc.)
• Understanding of change management in complex environments.
• Experience with scaling frameworks (LeSS, Nexus, etc.)
• Experience working in a project-based environment

Responsibilities:

• Analyze current team processes and build a roadmap for improvement.
• Define and track team/process/delivery metrics and visualize progress.
• Coach and mentor teams to foster growth, autonomy, and self-management.
• Collaborate with the Product Owner to improve backlog refinement and goal-setting processes.
• Identify risks and remove impediments, including dependencies and bottlenecks.
• Support cross-team collaboration and communication with stakeholders.
• Facilitate team events: Daily Scrums, Sprint Planning, Reviews, Retrospectives – while empowering teams to lead these sessions themselves.
• Promote a healthy team dynamic, facilitate conflict resolution, and monitor team health via observation and 1:1s.
• Mentor teams on Agile practices, Definition of Done, and effective tooling.
• Encourage and support the adoption of strong engineering practices like continuous delivery, use of feature flags, test automation, clean code, frequent refactoring, and fast feedback loops to help teams deliver high-quality, reliable software.
• Lead internal workshops/trainings on Agile techniques and tools.
• Ensure transparency through effective visualization (e.g., product goals, sprint targets, metrics).
• Work with PO and stakeholders on roadmap communication and sprint-to-product goal alignment.
• Continuously improve the Product Backlog Refinement process:
• Teach effective PBI creation and splitting techniques
• Support technical task prioritization
• Ensure backlog clarity, order, and visibility

What We Offer:

• Competitive salary
• Loyal, open-minded management and the ability to influence decision-making
• A collaborative and innovative environment with room for professional growth

About the project:

We’re looking for a Senior Full-Stack Developer (frontend focus) to join a project for a Dutch bookkeeping platform that is modernizing its accounting core: moving from legacy single-entry logic to a database-backed double-entry model, with better ledger-code management and reconciliation. The live platform stays fully operational, so all changes are delivered safely within the existing architecture, together with the client’s engineering team.

This is a frontend-focused role: React and production MobX experience are the core, while Java/Spring knowledge helps you deliver features end to end. Full-time, approximately 6 months.
Start & timeline:

We’re hiring in advance. The project is currently in Phase 2, and the role starts with Phase 3, expected in early January 2027 (exact date TBC). We’ll keep you updated throughout the hiring process.

Your team:

You’ll join an established Techstack team and work closely with the client’s internal engineers. The team includes a Project Manager, Lead Software Engineer, QA Engineer, Senior Full-Stack Developer (this position), 2 Back-End Developers, plus the client’s Solution Architect and CTO. We work through daily stand-ups, sprint reports, regular code reviews, and close communication with the client’s developers.

Culture:

We uphold high standards in the tech industry and continuously evolve to meet them. Every team member can influence the product, the company, internal processes, and their own professional growth. We also regularly organize team-building activities to keep a friendly atmosphere and simply enjoy time together.

Technical stack:

• Frontend: React, MobX, TypeScript, JavaScript
• Backend: Java, Spring, Hibernate, JPA, Redis
• Database: MariaDB, PostgreSQL, Flyway
• Testing: API/Cucumber, JUnit 5, WireMock, frontend/browser testing
• CI/CD & hosting: SonarCloud, CI pipelines, Docker, Linux, WAR deployment, AWS S3
• Tools: Jira, Confluence, Miro, Slack, Figma
• Practices: feature flags, code reviews, small PRs, regular releases

Your responsibilities:

• Develop and maintain features in existing React/MobX applications used by clients and bookkeepers
• Build administrative and configuration interfaces for ledger management and accounting workflows
• Implement searchable lists, forms with validation, role-based permissions, and reconciliation views
• Integrate frontend functionality with existing Java/Spring back-end APIs
• Support back-end development when needed for end-to-end delivery
• Make sure changes do not disrupt existing functionality in the live production platform
• Write and maintain frontend and browser-level automated tests
• Deliver changes through focused pull requests, feature flags, and regular releases
• Collaborate with the Tech Lead, back-end developers, QA, PM, and the client’s engineering team
• Participate in code reviews, daily stand-ups, demos, and acceptance testing

It’s about you:

• Strong commercial experience with React, TypeScript, and JavaScript
• Hands-on production experience with MobX
• Working knowledge of Java and Spring for end-to-end feature development
• Experience building admin/configuration interfaces, searchable lists, forms with validation, and role-based access
• Experience working with large existing codebases and maintaining backward compatibility
• Experience with feature flags, CI/CD, and small, focused pull requests
• Experience writing frontend and browser-level tests
• Ability to follow established architecture guidelines and collaborate through the client’s code reviews
• Good spoken and written English for daily communication with the client; Dutch is not required
• Time zone: Europe/Kyiv or compatible with CET/CEST working hours

Would be a plus:

• Experience in accounting, bookkeeping, or FinTech
• Experience with MariaDB, Hibernate, and Flyway
• Experience working with European clients

What we can offer you:

• Full-time engagement (40h/week) on a product with a complex, high-integrity domain
• Direct communication with all stakeholders, including the client’s engineering team
• Broad opportunities for professional and career growth: challenges, meetups, hackathons, professional communities, and more
• Horizontal connections and no micromanagement: all team members are accessible to each other for any questions
• Hubs in Kharkiv, Kyiv, Lviv, and Wrocław (Poland), or everything necessary for remote work
• Up to 50% compensation for educational courses and conferences
• Free English and business English courses
• 20 days off and 7 sick days
• Legal and accounting support
• Appreciation gifts for significant events and occasions

How to join Techstack:

1. Pre-screening with a Talent Acquisition Specialist
2. English check
3. Technical interview and evaluation with Techstack engineers
4. Candidate profile submission to the client
5. Technical interview with the client’s engineering representatives (if requested)

About the project:

We’re looking for two Back-End Developers (Middle+ / Senior level) to join our team on a project for a Dutch bookkeeping platform. The product is modernizing its accounting core: replacing legacy single-entry accounting logic with a database-backed double-entry model, improving ledger-code management, and introducing reliable reconciliation capabilities.

All changes are implemented within the existing Java/Spring application, with a strong focus on production stability, preserving historical accounting data, and safe migration to the new model. The current platform must keep running without disruption. This is a full-time engagement for approximately 6 months.
Start & timeline:

We’re hiring in advance. The project is currently in Phase 2, and the role starts with Phase 3, expected in early January 2027 (exact date TBC). We’ll keep you updated throughout the hiring process.

Your team:

You’ll join an established Techstack engineering team and work closely with the client’s internal developers and technical stakeholders. The team includes a Project Manager, Lead Software Engineer, QA Engineer, Senior Full-Stack Developer, and 2 Back-End Developers (these positions), plus the client’s Solution Architect and CTO. We work through daily stand-ups, sprint reports, regular code reviews, and close collaboration with the client’s engineering team.

Culture:

We uphold high standards in the tech industry and continuously evolve to meet them. Every team member can influence the product, the company, internal processes, and their own professional growth. We also regularly organize team-building activities to keep a friendly atmosphere and simply enjoy time together.

Technical stack:

• Backend: Java, Spring, Hibernate (monolith), JPA, Redis
• Database: MariaDB, PostgreSQL, Flyway migrations
• Testing & quality: JUnit 5, WireMock, API/Cucumber tests, CI, SonarCloud
• Hosting & deployment: Linux, WAR deployment, Docker (local/CI), AWS S3
• Integrations: third-party payroll and banking APIs, tax authority APIs, OpenAI, Mailgun
• Delivery practices: feature flags, regular releases, roll-forward fixes
• Frontend (awareness only): React, MobX, TypeScript, JavaScript
• Tools: Jira, Confluence, Miro, Slack, Figma

Your responsibilities:

• Develop back-end functionality within the existing Java/Spring monolith: APIs, business logic, and data models
• Design and modify database schemas; implement safe schema and data migrations
• Implement accounting logic with strong data-integrity requirements: balanced entries, auditability, and no data loss
• Develop role-based access controls for new functionality
• Build and maintain reconciliation and validation tools to compare the new accounting logic with existing system behavior
• Write unit and integration tests and keep regression suites green
• Support production releases: CI pipelines, feature flags, deployments, and post-release monitoring
• Investigate application logs and help troubleshoot deployment and production issues
• Work closely with the Tech Lead, back-end and front-end developers, QA, PM, and the client’s engineering team
• Participate in code reviews and maintain technical documentation

It’s about you:

• Solid commercial experience with Java
• Hands-on production experience with Spring and Hibernate
• Strong SQL skills and relational database design, preferably MariaDB or MySQL
• Experience with schema and data migrations using Flyway or similar tools
• Good understanding of transactions, database constraints, data integrity, and idempotent operations
• Experience writing unit and integration tests (JUnit 5, WireMock, or similar)
• Experience maintaining and extending large existing codebases without breaking functionality
• Familiarity with feature flags, small focused PRs, and CI pipelines
• Comfortable working with Linux, application logs, and supporting production releases; hands-on experience with deployments, troubleshooting, and post-release monitoring is highly valued
• Ability to follow established architecture standards and collaborate through code reviews with the client’s developers
• Good spoken and written English for daily communication with the client
• Time zone: Europe/Kyiv or compatible with CET/CEST working hours

Would be a plus:

• Experience in accounting, bookkeeping, or FinTech projects
• Experience with dual-write, reconciliation, or data verification during migrations and data model changes

What we can offer you:

• Full-time engagement (40h/week) on a product with a complex, high-integrity domain
• Direct communication with all stakeholders, including the client’s engineering team
• Broad opportunities for professional and career growth: challenges, meetups, hackathons, professional communities, and more
• Horizontal connections and no micromanagement: all team members are accessible to each other for any questions
• Hubs in Kharkiv, Kyiv, Lviv, and Wrocław (Poland), or everything necessary for remote work
• Up to 50% compensation for educational courses and conferences
• Free English and business English courses
• 20 days off and 7 sick days
• Legal and accounting support
• Appreciation gifts for significant events and occasions

How to join Techstack:

1. Pre-screening with a Talent Acquisition Specialist
2. English check
3. Technical screening and evaluation with Techstack engineers
4. Candidate profile submission to the client

We are looking for an AI/ML Research Scientist.

Requirements:

• PhD with 1+ years of research experience in Electrical Engineering, Computer Science, Information Systems, or a STEM-related field
• 1+ years of experience with modern machine learning architectures including Transformers, Graph Neural Networks, and Diffusion models
• Strong coding skills in Python and C++
• Experience with machine learning frameworks like PyTorch
• At least 1 publication in top machine learning conferences (NeurIPS, ICML, ICLR, etc.)
• Experience with deep learning on graphs (general graphs, circuit graphs, molecular graphs, or trees)
• Familiarity with classical search and optimization techniques (Genetic Algorithms, Monte-Carlo Tree Search, Dijkstra's Algorithm, etc.)
• Experience with EDA tools, either commercial or open-source
• Publications in top-tier venues focusing on AI for chip design or AI for materials science. 

We are looking for a Mid Data Engineer in Kraków, Poland who will own the company data lake — the system of record for millions of financial events a day (bets, wallet movements, live odds) across 12M+ active users. You decide how that data lands, is stored, retained, and governed on S3 + Snowflake/Databricks, so analytics, finance, and regulators all see accurate, reconciled data with zero drift from source.

Domain: Regulated iGaming / wallet & ledger data. Audit-heavy: regulators, finance and analytics all consume the same tables. Millions of financial events per day, terabyte-plus scale.
 

Key Responsibilities

• Own lakehouse architecture, including Bronze/Silver/Gold layers, Iceberg/Delta tables, and schema evolution.
• Build CDC streaming pipelines using Kafka, Debezium, or similar technologies, handling late and duplicate events.
• Optimize data storage and query performance through partitioning, compaction, and file sizing.
• Manage data retention, archival, regulatory requirements, and GDPR deletion.
• Ensure data accuracy through freshness SLAs, drift detection, and reconciliation with wallet and ledger systems.
• Own data governance, including cataloging, lineage, access control, PII masking, encryption, and audit trails.
• Monitor ingestion health, data quality, and cloud storage/compute costs.

Requirements

• 5+ years of experience in Data Engineering, with proven ownership of large-scale data lake or lakehouse architectures.
• Production experience with cloud storage (S3/GCS) and Snowflake, Databricks, or BigQuery.
• Hands-on experience with open table formats (Iceberg, Delta, or Hudi).
• Strong understanding of partitioning, file layout, and query optimization at terabyte scale.
• Experience with CDC and streaming ingestion (Kafka, Debezium, or equivalent).
• Strong SQL and data modeling skills, with a solid understanding of relational databases and financial ledger systems.
• Experience with data governance, including catalogs, lineage, access control, PII, and retention.
• Python and workflow orchestration experience (Airflow, Dagster, or similar).

• Hands-on experience building and deploying AI agents and LLM-powered workflows to automate complex processes at scale.

   

  Nice to have: Experience in fintech, iGaming, or other regulated, audit-heavy industries.

About us

We’re an international team of developers and QA engineers working across Mexico, Israel, and Ukraine. Together we build and grow the web and mobile products of one of the largest iGaming operators in Mexico.

One of our key products is a new CMS with a layout management system that we built from scratch, shaped directly by the needs of the business.

Our platform serves millions of users, so every requirement we write has a real impact on how people play, pay, and come back.

About the role
We're looking for a Business Analyst to join our product team. You'll turn business needs into clear, buildable requirements for our iGaming platform. You'll work between business stakeholders and the delivery team, and own requirements from the first workshop through to release.

What you'll do

• Gather requirements through interviews and workshops with stakeholders
• Write user stories with clear acceptance criteria, use cases, and functional and non-functional requirements
• Break epics down into backlog items in Jira and lead refinement sessions with developers and QA
• Specify the necessary integrations: REST API contracts, JSON data, errors, and edge cases. This includes internal services and third-party entities, such as game providers, IMS, and others
• Create prototypes and user flows to validate solutions before development starts
• Support the team during implementation, clarify requirements, and manage change requests
• Check delivered functionality against requirements and take part in acceptance testing
• Keep product documentation in Confluence current and structured

Must have

• 3+ years of experience as a Business Analyst (we’ll also consider a strong candidate with 2 years)
• 1+ year in the gambling / iGaming domain (casino, sportsbook, bonuses, wallet, payments) is must
• Strong experience writing user stories and acceptance criteria
• Confident use of Jira and Confluence
• Practical understanding of REST APIs and JSON: reading API docs is must
• Practice experience with development tools (Chrome dev tools or any other) is must
• Good understanding of the SDLC and Agile (Scrum, Kanban)
• Attention to detail and the ability to find edge cases before developers do
• Hans on experience with regulated markets (self-exclusion, Cool-off / time-out, etc). Familiarity with Gaming Laboratories International is must
• English: Upper-Intermediate (B2) or higher

Nice to have

• Prototyping experience (Figma, Miro or similar)
• Use of AI tools in analysis and documentation
• Experience with analytics dashboards

What we offer

• Fully remote work from Europe or Ukraine
• Paid vacation: 21 days, paid sick leave: 5 days 
• Medical insurance / benefits budget
• A product with real scale and a direct impact on how it grows

About the company
 

We are an established iGaming company with 4+ years of experience, a team of 1,600+ specialists, and 10+ large-scale projects operating across Tier 1–3 markets.
 

We are partnering with a professional affiliate SEO company operating in highly competitive iGaming and casino niches. The team builds and scales SEO projects, generates organic traffic, and monetizes it through partnerships with leading operators and their affiliate programs.
 

As the business continues to grow, we are looking for a Junior Affiliate / Business Development Manager to support partnership development, manage communication with operators, and ensure accurate reporting across projects.

Responsibilities

• Communicate with operators and their affiliate programs regarding partnership opportunities, onboarding, commercial terms, and ongoing matters.
• Build and maintain relationships with existing affiliate partners.
• Coordinate partnership agreements and monitor compliance with agreed terms.
• Collect data from affiliate platforms and consolidate performance reports across projects.
• Reconcile key metrics across different sources, including traffic, registrations, deposits, and payouts.
• Monitor commission calculations, payment accuracy, and payout schedules.
• Prepare regular performance and financial reports for management.
• Maintain and update the partner database, commercial terms, and related documentation.

• Support the team with day-to-day partnership management and business development activities.

   

Requirements

• Approximately 1 year of experience in affiliate marketing.
• Previous experience in iGaming.
• Confident working knowledge of Google Sheets / Excel, including formulas, filters, and pivot tables.
• Basic understanding of affiliate marketing metrics and payment models (CPA, RevShare, Hybrid), or willingness to learn quickly.
• Strong attention to detail and accuracy when working with numbers.
• Structured thinking and the ability to organize data and processes.
• Good communication and relationship-building skills.
• Strong sense of responsibility, initiative, and ownership.

• Ability to prioritize tasks, manage time effectively, and meet deadlines.

   

Would be a plus

• Experience working with operators' affiliate platforms.
• Experience reconciling partner commissions, payouts, and financial reports.