Jobs at Djinni

We are looking for a motivated and enthusiastic Junior Specialist to join our team. This is an excellent opportunity for someone who is eager to learn, develop new skills, and gain hands-on experience in a professional environment

Candidates from Warsaw, Poland only

What you will do

• Develop and maintain web and mobile applications
• Implement new features and functionality based on product requirements
• Write clean, maintainable, and scalable TypeScript code
• Optimize application performance, responsiveness, and user experience
• Participate in code reviews and follow development best practices
• Troubleshoot, debug, and resolve technical issues
   

Requirements

• Strong experience with React and TypeScript
• Solid understanding of modern JavaScript (ES6+)
• Experience with component-based architecture, hooks, and state management
• Familiarity with REST APIs and backend integration patterns
• Experience with Git and collaborative development workflows
• Strong attention to detail and commitment to writing high-quality code
• Sense of ownership and responsibility for delivered tasks
• Proactive, reliable, and able to work independently when needed
• English level: B1 or higher (ability to read documentation and communicate within a team)

Additional information

• React Native experience is a plus
• Use of AI tools (e.g., Claude, Kiro, MCP) is welcome and encouraged for productivity
• Candidates should be able to explain, reason about, and write code independently, not solely rely on AI-generated solutions

About the Role

We're looking for a Performance Creative Strategist to shape and improve paid social advertising concepts for multiple ecommerce businesses.

Rather than producing creatives yourself, you'll focus on identifying effective messaging, customer insights, offers, and creative angles that improve acquisition results. This role is centered around strategy, research, testing, creative planning, and collaboration with production teams.

The right person enjoys analyzing what drives advertising performance and turning those findings into structured testing plans and actionable creative briefs.

Responsibilities

Creative Strategy

• Develop concepts for paid social campaigns across multiple brands.
• Define messaging, hooks, value propositions, and creative frameworks.
• Plan structured testing initiatives and maintain a roadmap of new experiments.
• Generate fresh ideas using campaign results and customer insights.
• Continuously expand the testing pipeline.

Market & Customer Research

• Review competitor advertising across Meta, TikTok, and other channels.
• Track creative trends and emerging opportunities.
• Research customer motivations, objections, and purchasing behavior.
• Identify recurring patterns behind high-performing campaigns.

Creative Briefing

• Prepare clear creative briefs for designers, editors, and content creators.
• Define campaign objectives, messaging direction, and creative structure.
• Provide strategic guidance during production.
• Review completed creatives and recommend improvements.

Performance Optimization

• Evaluate campaign and creative performance.
• Convert performance insights into future testing ideas.
• Maintain documentation of learnings and best practices.
• Partner closely with paid media specialists and growth teams.
• Improve internal creative testing processes over time.

Requirements

• 3+ years in creative strategy within ecommerce or performance marketing.
• Strong understanding of direct response marketing principles.
• Experience planning structured creative testing.
• Experience preparing briefs for creative production teams.
• Strong analytical and strategic thinking skills.
• Hands-on experience with Meta advertising.
• Experience collaborating with media buying teams.
• Ability to support several brands simultaneously.
• Experience in fast-paced creative testing environments.
• Understanding of why certain creatives outperform others.
• Strong knowledge of customer psychology, messaging, hooks, and offer development.
• Excellent written and spoken English.

Nice to Have

• Agency background.
• Experience leading or mentoring creative professionals.
• Exposure to high-budget ecommerce advertising accounts.
• Experience with DTC consumer brands.
• Familiarity with advanced performance marketing and creative testing methodologies.

We are expanding our Media Buying department and looking for an experienced Media Buying Team Lead who can combine hands-on traffic acquisition with strong leadership and team management.

This role is ideal for someone who enjoys scaling profitable campaigns, building efficient processes, and helping media buyers achieve outstanding results.

Responsibilities

• Lead and mentor the Media Buying team.
• Monitor team performance and ensure KPI achievement.
• Launch, optimize, and scale paid traffic campaigns together with the team.
• Manage traffic acquisition performance and budget allocation.
• Analyze department metrics and identify growth opportunities.
• Improve technical infrastructure and workflows.
• Oversee tracking systems and advertising tools.
• Develop and implement new testing strategies.
• Collaborate with Product and Marketing teams.

Requirements

• 1+ year of experience as a Media Buying Team Lead.
• Hands-on experience in iGaming traffic acquisition.
• Experience managing advertising budgets of $30,000+ per month.
• Strong analytical mindset.
• Deep understanding of Facebook Ads.
• Ability to coach and develop Media Buyers.
• Strong decision-making skills based on data.

Technical Skills

• Facebook Ads Manager.
• Keitaro.
• Anti-detect browsers.
• Traffic automation tools.
• App rental services.
• Android / iOS / PWA.
• API & S2S integrations (nice to have).

What We Offer

• Remote  work.
• Flexible schedule.
• In-house product.
• Base salary starting from $1,600 + performance bonus.
• Career growth to Head of Media Buying.

We are growing our in-house B2C iGaming product and looking for a Middle Media Buyer to strengthen our acquisition team.

You will be responsible for launching, optimizing, and scaling Facebook/Instagram campaigns across Turkey and LATAM, with future expansion into new GEOs.

We are looking for someone who thinks beyond traffic acquisition and understands the full performance funnel—from acquisition to profitability.

Responsibilities

• Launch, optimize, and scale Facebook & Instagram campaigns.
• Manage paid traffic across Turkey and LATAM.
• Analyze campaign performance using ad platforms, trackers, and CRM.
• Test creatives, funnels, and traffic hypotheses.
• Prepare creative briefs tailored to specific GEOs.
• Work with Android, iOS, and PWA applications.
• Monitor and improve key performance metrics including CTR, CPA, ROI, LTV, and NGR.
• Analyze cohort profitability
• Scale profitable campaigns while maintaining target KPIs.

Requirements

• 2+ years of Media Buying experience in iGaming.
• Hands-on experience with Turkey and/or LATAM markets.
• Experience managing monthly ad budgets of $50,000+.
• Strong expertise in Facebook Ads.
• Experience with Keitaro or similar tracking platforms.
• Understanding of cloaking, anti-detect browsers, account farming.
• Basic knowledge of API and S2S integrations.
• Strong analytical mindset with solid understanding of ROI, CPA, CTR, LTV, and NGR.
• Ability to independently test, analyze, and scale campaigns.

Nice to have

• Experience launching new GEOs.
• Understanding of LATAM and Turkey payment ecosystems.
• Product analytics experience.
• Experience with PWA.

What we offer

• Fully remote work.
• Flexible working hours.
• In-house product.
• Base salary starting from $1,000 + KPI-based bonuses.
• Career growth to Team Lead
• Fast decision-making and minimal bureaucracy.

Join our dynamic team at CoreWillSoft GmbH as a QA Engineer! We build innovative security software for critical facilities and infrastructure, combining building automation, IoT, and physical access control to protect what matters most. 

We are looking for an experienced QA Engineer to join our team in ensuring the quality and reliability of our products that are used by multiple businesses across Europe, USA and Canada. Our Agile team operates from multiple locations with headquarters in Bonn, Germany, and is responsible for the complete software development lifecycle; including initiating, implementation, and operation of the physical access control software operating multiple electronic locks over different radio protocols and RFID identification media. 

This role combines manual and automated testing. The approximate workload is expected to be around 70% manual testing and 30% test automation, although the balance may vary depending on the project, product stage, and current team priorities.

This is an exciting opportunity to work on cutting-edge projects involving high-security hardware and technology in a creative, international environment. You will have the chance to work with a talented team and make a real impact on our customers' businesses. 

What you`ll do: 

• Prepare QA related documentation that align with the product and company needs. 
• Perform testing on physical security systems and extensions, ensuring their functionality and reliability. 
• Collaborate closely with the Product Manager and development team to supervise product quality. 
• Continuously develop testing processes and methodologies to improve product quality and efficiency. 
• Analyze product performance metrics and provide insights for improvements. 
• Work with cross-functional teams, including engineering, sales, and support, to ensure a seamless customer experience. 
• Stay up-to-date with industry trends and best practices in quality assurance. Willingness for the professional self development inside the QA team and on the company level. 

What we offer: 

• Meaningful Impact: Build solutions that are used every day by thousands of businesses your work will directly improve real-world security and connected device experiences. 
• Product & Process Ownership: Help shape not only the product, but also how we build and deliver it  your ideas and decisions will have visible impact. 
• Industry Influence: Contribute to key security standards and best practices, staying ahead of the curve in a fast-evolving industry. 
• Modern Tech Stack & Hardware: Work with the latest hardware and the tools you need to do your best work. 
• Time Off & Flexibility: Vacation days, paid sick leave, and public holidays in line with German legislation plus flexibility built around outcomes, not micromanagement. 
• Learning & Development Budget: We support continuous growth by covering hard and soft skills courses, trainings, and access to e-learning platforms. 
• Coworking Support: Prefer not to work from home every day? We offer coworking compensation so you can choose the environment that fits you best. 
• Language Learning Support: Monthly fixed compensation you can use to improve your English or German through the learning format of your choice. 
• Strong Team Culture: Open collaboration, a flat structure, and thoughtful onboarding your voice is heard, and you can make an impact from day one. 

What you`ll bring: 

• Experience in automated and manual QA testing (web, mobile and/or desktop), preferably in physical security systems or similar domains. 
• Strong understanding of QA methodologies, tools, and processes. 
• Hands-on experience with automation testing and maintaining automated test coverage.
• Knowledge of the Software Development Lifecycle 
• Experience with test planning, execution, and reporting. 
• Strong communication and collaboration skills. 
• Advanced English language knowledge 
• Experience with product development methodologies (Agile, SCRUM / Kanban) 
• Strong analytical and problem-solving skills, with a focus on continuous process improvement on the product and company level. 
• Basic knowledge of computer science, scriptwriting, system topology understanding, networking infrastructures and protocols understanding, familiarity with database management systems. 
• Experience in API testing. 
• Experience in AI usage in testing activities 
• Tooling knowledge e.g. git, UNIX command-line tools, curl, Charles Proxy, Wireshark, development tools.  
• Understanding of general security concepts and security testing. 
   

Nice to have: 

• Experience with IoT products in building automation and physical access control. 
• Degree in Computer Science, Engineering, or related field. 
• German language skills. 
• AWS EC2 knowledge 

Centrobill is a global fintech company with over 13 years of industry experience, helping merchants accept payments through credit cards, debit cards, and alternative payment methods. We operate with an international team and a results-oriented environment focused on innovation, growth, and long-term partnerships.  

We're looking for a motivated specialist who wants to build a career in payments and grow into a Support role - becoming the go-to person for our clients on everything related to payment processing and account management.

This is an exciting opportunity for professionals with 1+ years of experience who want to grow their career, expand expertise, and gain hands-on experience in the fast-growing fintech industry.

Requirements for the candidate:

• Experience in payments, fintech, e-commerce
• Strong analytical, pattern recognition and problem-solving skills
• Basic understanding of card payments workflow and 3D Secure
• Basic understanding of APIs, HTTP requests, JSON, and web technologies
• English (to email with clients, read and interpret technical documentation)
• Manage multiple requests and priorities simultaneously
• Strong attention to detail and ability to solve problems individually
• Adaptability to new patterns, quick-learner
• Comfortable working with SLAs/ticketing systems such as Jira.

Nice to have:

• Experience with log analysis tools (e.g. AWS CloudWatch Logs Insights, Elasticsearch, Kibana)

• Experience with API testing tools (e.g. Postman)

   

What Merchant support specialist does:

• Onboard new clients and helps them integrate our API & launch payment methods
• Investigate client-reported incidents & assist with questions via ticketing system
• Use internal tools, logs, and monitoring systems (AWS CloudWatch Logs Insights, Kibana/Elasticsearch)
• Work closely with our Development, Payments Operations, Sales teams to resolve merchant issues
• Escalate requests to appropriate teams and facilitate/track them through resolution

• Contribute to internal documentation

   

What we offer:

• Stable salary and official employment
• Paid time off and holiday gifts
• Corporate insurance and English courses (after the probation period)
• Opportunity to join a growing international payments business
• Flexible work environment
• Career growth 

• Remote or office (Kyiv)

   

Why join us?

Looking for a place where you can grow and achieve great results in a positive environment? If so, don’t miss this rare opportunity! Review the job description and send us your resume today - we’re excited to talk with you as soon as tomorrow!

We're looking for a 3D Artist for Roblox projects who can fully own the 3D side of a title.

You will be the only 3D artist on the project, responsible for environments, characters/creatures, props, rigging, animation, asset import, and optimization in Roblox Studio.

Code and UI design are handled internally — we need someone who can take a written specification and deliver the complete 3D side of the game.

Tech Stack:

• Blender — modeling, UVs, rigging, animation, baking
• Roblox Studio — MeshParts, SurfaceAppearance/PBR, MaterialVariants, terrain, lighting
• FBX → Roblox pipeline — skinned meshes, deform-only export, maximum 4 bone influences per vertex
• Substance Painter / Photoshop / Krita — textures and baking
• AI 3D and texture generation — Meshy, Hyper3D-Rodin, Hunyuan3D, and similar tools — required

What We're Looking For:

• 2+ years of professional 3D game development experience
• A portfolio demonstrating a stylized low-poly / cartoon art style
• Clean topology, sensible UVs, and the ability to maintain a consistent art style and defined color palette
• Experience baking procedural/toon materials into textures using Cycles/Eevee and building materials for Roblox
• Rigging and skinning experience:
  • bone-based rigs
  • squash & stretch
  • deformation without scaling bones
  • looped animations such as idle, jump, and reaction
• Strong understanding of performance budgets:
  • polygon count
  • texture size and quantity
  • draw calls
  • CollisionFidelity / RenderFidelity
  • assets must perform well on mobile devices
• Environment art experience:
  • building complete themed locations
  • terrain
  • islands/biomes
  • props and decoration
  • readable silhouettes and strong composition
• AI-first workflow — you use AI to generate base shapes and textures, then refine and finish them manually. Manually blocking out assets from scratch when AI can handle the initial work is considered unnecessary overhead.

• Nice to have:
  • published Roblox games
  • mobile F2P experience

Responsibilities:

• Own the entire 3D production of a title:
  • themed environment set
  • roster of creatures/characters and variations
  • props and decorative assets
• Create rigs and looped animations for creatures
• Export and import assets into Roblox Studio, including checking:
  • scale
  • orientation
  • materials
  • deformation
• Optimize and reuse assets through:
  • modular kits
  • shared texture atlases
  • color/material variations instead of creating new meshes
• Work from a written specification and deliver the result already assembled and tested in Roblox Studio, not just a collection of .blend files
• Work in short, fixed release cycles — the complete art pass for a title should fit within a single cycle, with the next title already in the pipeline

What You Won't Have to Do:

• UI design
• Icons, thumbnails, and marketing art — handled internally
• Scripting or gameplay programming

What We Offer:

• 💰 $2,000+
• 🌍 Fully remote
• 🎨 Full ownership of the visual side of your project, with no micromanagement
• 🤖 AI tools are paid for and expected to be used to their full potential
• 📈 Live projects with real players and real revenue

Hiring Process:

We use a paid technical test.

You'll create one asset based on a written specification:

• either a creature with a rig and looped animation
• or a small environment set

The final result must be imported and properly assembled in Roblox Studio.

Level: Middle Engagement: Long-term contract Location: Europe (EU / EEA / UK), remote Working hours:EU business hours, shifted 2–3 hours later to ensure daily overlap with US West Coast (PST/PDT) mornings

ABOUT THE CLIENT

Our client is a leading enterprise data platform company building an open, high-performance data lakehouse for AI and analytical workloads. The platform combines an intelligent SQL query engine, an AI-ready semantic layer, and an open catalog built on Apache Iceberg — enabling Fortune 500 companies across finance, energy, manufacturing, and logistics to unify, query, and govern data at massive scale across cloud and on-premise sources.

ABOUT THE ROLE

We are looking for a Middle-level Software Engineer to work on the core query engine of a large-scale distributed data platform. You will develop features across query planning, optimization, and execution, contribute to performance-critical components, and help evolve the platform's ability to process massive analytical workloads across heterogeneous data sources.

This is a systems-level, backend engineering role focused on distributed data processing internals — not application development or CRUD services.

RESPONSIBILITIES

• Develop and maintain features across the query engine — planning, optimization, execution, and data access layers.
• Write high-quality, performance-conscious code in Java and/or C++.
• Work with SQL semantics, query plans, and execution operators over large-scale distributed data.
• Integrate with columnar formats, open table formats, and connectivity drivers used across the platform.
• Contribute to CI/CD pipelines and automated testing — participate in build, test, and release workflows in Jenkins.
• Deploy and validate work in Kubernetes (GKE / EKS / AKS) across GCP, AWS, and Azure using Docker.
• Debug complex issues spanning query planning, distributed execution, memory management, and I/O.
• Collaborate closely with US-based engineering teams on design reviews, code reviews, and technical decisions.

REQUIRED QUALIFICATIONS

• Education: B.S. or M.S. in Computer Science, Computer Engineering, or a related technical field.
• Programming: Strong proficiency in Java or C++, with solid OOP and software design fundamentals. Candidates comfortable with both are especially valued.
• SQL & Data: Strong SQL skills and solid understanding of relational and analytical data systems, including query execution concepts.
• Data processing systems experience: Hands-on experience with data processing systems — query engines, distributed databases, ETL/ELT frameworks, or analytical platforms.
• Engineering experience: 3+ years in backend/systems software engineering.
• CI/CD & DevOps basics: Practical experience with Jenkins pipelines and modern development workflows.
• Containers: Working knowledge of Docker and basic Kubernetes (running workloads, debugging pods, kubectl fluency).
• Cloud: Comfortable operating in at least one major cloud (GCP, AWS, or Azure).
• Version Control: Confident with Git / GitHub workflows.
• English: Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team.
• Availability: Able to work EU hours with a 2–3 hour shift toward US West Coast time to ensure daily overlap with the client team.

DESIRED SKILLS

• Experience with Apache Arrow (columnar in-memory format).
• Familiarity with Apache Calcite (SQL parsing, planning, optimization framework).
• Exposure to Gandiva or LLVM-based expression compilation.
• Experience with open table formats — Apache Iceberg, Delta Lake, or Hudi.
• Familiarity with distributed computing frameworks (e.g., Apache Spark, Kafka) and MPP SQL query engines(e.g., Presto, Trino, or similar).
• Understanding of query planning, optimization, and execution internals.
• Experience with data connectivity drivers: JDBC, ODBC, Arrow Flight.
• Kubernetes on managed services (GKE / EKS / AKS) and multi-cloud exposure.
• IaC tools such as Terraform.
• Experience with performance profiling and optimization of latency-sensitive systems.
• Please note: We can consider only candidates currently residing in the EU, EEA, or the UK.

Level: Senior Engagement: Long-term contract Location: Europe (EU / EEA / UK), remote Working hours:EU business hours, shifted 2–3 hours later to ensure daily overlap with US West Coast (PST/PDT) mornings

ABOUT THE CLIENT

Our client is a leading enterprise data platform company building an open, high-performance data lakehouse for AI and analytical workloads. The platform combines an intelligent SQL query engine, an AI-ready semantic layer, and an open catalog built on Apache Iceberg — enabling Fortune 500 companies across finance, energy, manufacturing, and logistics to unify, query, and govern data at massive scale across cloud and on-premise sources.

ABOUT THE ROLE

We are looking for a Senior Software Engineer to design, build, and own significant components of the core query engine of a large-scale distributed data platform. You will lead work across query planning, optimization, and execution — driving architectural decisions, mentoring middle engineers, and pushing the platform's performance and scalability boundaries across all major clouds.

This is a systems-level, backend engineering role focused on distributed data processing internals — not application development or CRUD services.

RESPONSIBILITIES

• Architect, design, and implement significant components of the query engine — planner, optimizer, execution operators, memory management, and data access layers.
• Write and review high-quality, performance-critical code in Java and/or C++.
• Own end-to-end delivery of features from technical design through production rollout.
• Drive performance optimization work — profiling, benchmarking, and eliminating bottlenecks in latency- and throughput-sensitive paths.
• Integrate deeply with columnar formats, open table formats, and connectivity drivers.
• Mentor middle engineers, lead code reviews, and set technical standards for the team.
• Contribute to CI/CD architecture and quality processes across Jenkins, containerization, and multi-cloud deployment (GCP, AWS, Azure via Kubernetes / Docker).
• Debug complex, cross-layer issues spanning query planning, distributed execution, memory management, and I/O.
• Partner with US-based engineering leads on design reviews, architectural decisions, and roadmap execution.

REQUIRED QUALIFICATIONS

• Education: B.S. or M.S. in Computer Science, Computer Engineering, or a related technical field.
• Programming: Strong proficiency in Java or C++, with deep understanding of OOP, systems design, memory management, and concurrency. Candidates strong in both are especially valued.
• SQL & Data: Advanced SQL skills and strong understanding of query execution internals — planning, optimization, and operator implementation.
• Data processing systems experience: Demonstrated experience building or extending data processing systems — query engines, distributed databases, ETL/ELT frameworks, or analytical platforms.
• Engineering experience: 5+ years in backend/systems software engineering, with a track record of owning significant components.
• CI/CD & DevOps: Solid experience with Jenkins and modern engineering workflows.
• Containers & Orchestration: Strong working knowledge of Docker and Kubernetes.
• Cloud: Hands-on experience with at least one major cloud (GCP, AWS, or Azure); exposure to more than one is a strong plus.
• Version Control: Confident with Git / GitHub workflows and rigorous code review practices.
• English: Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team.
• Availability: Able to work EU hours with a 2–3 hour shift toward US West Coast time to ensure daily overlap with the client team.
• Leadership: Prior experience mentoring engineers, leading technical designs, or owning components end-to-end.

DESIRED SKILLS

• Deep experience with Apache Arrow (columnar in-memory format).
• Hands-on experience with Apache Calcite (SQL parsing, planning, optimization framework).
• Experience with Gandiva or LLVM-based expression compilation and code generation.
• Experience with open table formats — Apache Iceberg, Delta Lake, or Hudi.
• Deep familiarity with distributed computing frameworks (e.g., Apache Spark, Kafka) and MPP SQL query engines (e.g., Presto, Trino, or similar).
• Deep understanding of query planning, optimization (cost-based, rule-based), and execution internals.
• Experience with data connectivity drivers: JDBC, ODBC, Arrow Flight.
• Kubernetes on managed services (GKE / EKS / AKS) and multi-cloud exposure.
• IaC tools such as Terraform.
• Track record of performance optimization at the systems level — profiling, vectorization, cache/memory-conscious design.
• Prior experience contributing to open-source data infrastructure projects.
• Please note: We can consider only candidates currently residing in the EU, EEA, or the UK

Level: Middle Engagement: Long-term contract Location: Europe (EU / EEA / UK), remote Working hours:EU business hours, shifted 2–3 hours later to ensure daily overlap with US West Coast (PST/PDT) mornings

ABOUT THE CLIENT

Our client is a leading enterprise data platform company building an open, high-performance data lakehouse for AI and analytical workloads. The platform combines an intelligent SQL query engine, an AI-ready semantic layer, and an open catalog built on Apache Iceberg — enabling Fortune 500 companies across finance, energy, manufacturing, and logistics to unify, query, and govern data at massive scale across cloud and on-premise sources.

ABOUT THE ROLE

We are looking for a Middle-level SDET to design and maintain automated tests for a large-scale distributed data platform. You will validate the correctness, performance, and reliability of the query engine, connectivity layer, and backend services across all major clouds.

This is a data-heavy, backend-focused role. We are not looking for web/UI QA engineers — the work centers on validating distributed query execution, data correctness at scale, connectivity drivers, and backend microservices.

RESPONSIBILITIES

• Develop and maintain automated tests in Python / pytest for backend services, REST APIs, and distributed data components.
• Write end-to-end, integration, and regression tests covering SQL query execution, data correctness, and platform APIs.
• Support performance and load testing with JMeter, including workloads over JDBC / ODBC / Arrow Flightdrivers.
• Validate data-intensive scenarios — query plans, result correctness across data sources, metadata consistency, and behavior under concurrency.
• Contribute to CI/CD test pipelines in Jenkins — configure, maintain, and troubleshoot.
• Provision and manage test environments in Kubernetes (GKE / EKS / AKS) across GCP, AWS, and Azure using Docker.
• Investigate failures across the stack — query engine, distributed services, drivers, infrastructure — and drive them to resolution with engineering.
• Collaborate with US-based developers on testability and quality gates.

REQUIRED QUALIFICATIONS

• Education: B.S. or M.S. in Computer Science, Computer Engineering, or a related technical field.
• Programming: Strong proficiency in Python, including pytest, with a solid grasp of OOP and software design principles.
• SQL & Data: Strong SQL skills and solid understanding of how relational and analytical data systems work.
• Data-intensive testing experience: Hands-on experience testing data-intensive systems — query engines, ETL/ELT pipelines, streaming platforms, or analytical databases. Candidates with only web/UI QA backgrounds are not a fit.
• Testing experience: 3+ years in backend/system test automation or SDET roles.
• CI/CD & DevOps basics: Practical experience with Jenkins pipelines and deploying/maintaining test environments.
• Containers: Working knowledge of Docker and basic Kubernetes (running workloads, debugging pods, kubectl fluency).
• Cloud: Comfortable operating in at least one major cloud (GCP, AWS, or Azure).
• Version Control: Confident with Git / GitHub workflows.
• English: Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team.
• Availability: Able to work EU hours with a 2–3 hour shift toward US West Coast time to ensure daily overlap with the client team.

DESIRED SKILLS

• Experience testing REST APIs and backend microservices at scale.
• Familiarity with distributed computing frameworks (e.g., Apache Spark, Kafka) and MPP SQL query engines(e.g., Presto, Trino, or similar).
• Understanding of modern data lakehouse concepts, open table formats (Apache Iceberg), and data warehousing.
• Experience with data connectivity drivers: JDBC, ODBC, Arrow Flight.
• Performance testing with JMeter or comparable load-testing tools.
• Kubernetes on managed services (GKE / EKS / AKS) and multi-cloud exposure.
• IaC tools such as Terraform.
• Understanding of query plan generation, query acceleration / materializations, and metadata integrity in distributed data systems.
• Please note: We can consider only candidates currently residing in the EU, EEA, or the UK

Level: Senior Engagement: Long-term contract Location: Europe (EU / EEA / UK), remote Working hours:EU business hours, shifted 2–3 hours later to ensure daily overlap with US West Coast (PST/PDT) mornings

ABOUT THE CLIENT

Our client is a leading enterprise data platform company building an open, high-performance data lakehouse for AI and analytical workloads. The platform combines an intelligent SQL query engine, an AI-ready semantic layer, and an open catalog built on Apache Iceberg — enabling Fortune 500 companies across finance, energy, manufacturing, and logistics to unify, query, and govern data at massive scale across cloud and on-premise sources.

ABOUT THE ROLE

We are looking for a Senior SDET to lead the design of automated test frameworks and testing strategy for a large-scale distributed data platform. You will own the quality of the query engine, connectivity layer, and backend services end-to-end — from framework architecture through CI/CD infrastructure across all major clouds — and mentor middle engineers on the team.

This is a data-heavy, backend-focused role. We are not looking for web/UI QA engineers — the work centers on validating distributed query execution, data correctness at scale, connectivity drivers, and backend microservices.

RESPONSIBILITIES

• Architect, design, and evolve automated test frameworks in Python / pytest for backend services, REST APIs, and distributed data components.
• Define testing strategy for new features and platform components — coverage, risk assessment, and quality gates.
• Own end-to-end, integration, performance, and regression testing covering SQL query execution, data correctness at scale, and platform APIs.
• Lead performance and load testing efforts with JMeter, including workloads over JDBC / ODBC / Arrow Flightdrivers.
• Design and validate large-scale data testing scenarios — query plans, result correctness across heterogeneous data sources, metadata consistency, and behavior under high concurrency.
• Own CI/CD test pipelines in Jenkins — architect, maintain, and continuously improve.
• Provision and manage test environments in Kubernetes (GKE / EKS / AKS) across GCP, AWS, and Azure using Docker; drive automation and reproducibility.
• Investigate complex, cross-layer failures and drive root-cause analysis with engineering.
• Mentor middle SDETs, review test designs, and set quality standards across the team.
• Partner with US-based development leads on shift-left practices, testability, and release readiness.

REQUIRED QUALIFICATIONS

• Education: B.S. or M.S. in Computer Science, Computer Engineering, or a related technical field.
• Programming: Strong proficiency in Python, including pytest, with deep understanding of OOP, software design principles, and test framework architecture.
• SQL & Data: Advanced SQL skills and strong understanding of relational and analytical data systems, including query execution internals.
• Data-intensive testing experience: Demonstrated experience testing data-intensive systems — query engines, ETL/ELT pipelines, streaming platforms, or analytical databases. Candidates with only web/UI QA backgrounds are not a fit.
• Testing experience: 5+ years in backend/system test automation, with demonstrated ownership of test strategy and infrastructure.
• CI/CD & DevOps: Solid experience architecting and maintaining Jenkins pipelines and test environments.
• Containers & Orchestration: Strong working knowledge of Docker and Kubernetes (running workloads, debugging pods, deploying complex environments).
• Cloud: Hands-on experience with at least one major cloud (GCP, AWS, or Azure); exposure to more than one is a strong plus.
• Version Control: Confident with Git / GitHub workflows and code review practices.
• English: Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team.
• Availability: Able to work EU hours with a 2–3 hour shift toward US West Coast time to ensure daily overlap with the client team.
• Leadership: Prior experience mentoring engineers, defining test strategy, or leading a QA/SDET function.

DESIRED SKILLS

• Deep experience testing REST APIs and backend microservices at scale.
• Hands-on with distributed computing frameworks (e.g., Apache Spark, Kafka) and MPP SQL query engines(e.g., Presto, Trino, or similar).
• Strong understanding of modern data lakehouse concepts, open table formats (Apache Iceberg), and data warehousing.
• Experience with data connectivity drivers: JDBC, ODBC, Arrow Flight.
• Performance testing with JMeter or comparable load-testing tools at production scale.
• Kubernetes on managed services (GKE / EKS / AKS) and multi-cloud exposure.
• IaC tools such as Terraform.
• Deep understanding of query plan generation, query acceleration / materializations, and metadata integrity in distributed data systems.
• Prior experience leading a QA/SDET function in a data-platform or database engineering environment.
• Please note: We can consider only candidates currently residing in the EU, EEA, or the UK.

We are looking for an experienced Engineering Manager to lead and scale our engineering teams building a high-performance trading platform. You will be responsible for people leadership, delivery excellence, and technical direction across a hybrid infrastructure.

This role sits at the intersection of engineering, infrastructure, and business, with a strong focus on reliability, performance, and scalability in a latency-sensitive environment.

Responsibilities

- Lead and manage cross-functional engineering team up to 10 engineers (backend, frontend, infrastructure, mobile)

- Own delivery, quality, and technical outcomes for your teams

- Partner closely with Product, Trading, and Senior Engineering leadership to translate business requirements into technical execution

- Drive and evolve engineering processes: planning, estimation, CI/CD, code reviews, testing, and release management

- Guide architectural decisions for systems running on hybrid infrastructure

- Ensure high availability, performance, and observability of production systems

- Identify and reduce technical debt, while maintaining delivery velocity

- Hire, onboard, mentor, and grow engineers; conduct 1:1s and performance reviews

- Foster a culture of ownership, customer first, and result-oriented

Requirements

- 5+ years of professional software engineering experience

- 3+ years in an Engineering Manager role

- Background in financial systems, trading platforms, or other high-reliability domains

- Strong understanding of backend systems, ideally with hands-on experience in Ruby

- Experience operating systems on AWS (EC2, networking, security, monitoring)

- Experience working with on-premise infrastructure and hybrid environments.

- Knowledge of CI/CD pipelines, infrastructure automation, and deployment strategies

- Familiarity with observability tools (metrics, logging, alerting) and performance monitoring

Will be a Plus

- Experience with low-latency or high-throughput systems

- Exposure to trading, fintech, or market-data platforms

- Experience scaling teams and systems

- Hands-on experience with infrastructure-as-code tools

We offer

• 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)

We're looking for a Financial Analyst to own cash forecasting, budgeting, and financial modeling, with full visibility across the P&L, balance sheet, and forward-looking scenarios. The role involves close collaboration with department heads and other stakeholders to keep financial planning accurate and aligned across the business.

What you'll do

• Build and maintain financial models for budgeting, forecasting, and long-term planning
• Turn financial data into insights that inform strategic decisions
• Deliver monthly, quarterly, and annual financial reports
• Work with other departments to collect and interpret financial information
• Monitor KPIs and produce variance analysis
• Prepare ad hoc reports and presentations for senior management and stakeholders
• Keep financial reporting aligned with regulatory requirements and internal policy
• Use NetSuite, Abacum, HubSpot, and related tools for reporting and analysis
• Maintain clean, well-documented reporting — schedules, reconciliations, supporting files — that would hold up to investor, auditor, or buy-side/sell-side scrutiny
• Support due diligence requests, data room preparation, and ad hoc analyses for investors, bankers, or auditors

• Take on other finance tasks as needed

   

What we're looking for

• 5+ years of experience in financial planning and analysis
• English at B1 level or higher, written and spoken
• Proven experience building and maintaining financial models (P&L, cash flow, balance sheet projections)
• Solid background in budgeting, forecasting, and KPI tracking
• Strong analytical and problem-solving skills
• Ability to communicate findings clearly to stakeholders
• Comfortable working both independently and within a team
• Experience handling multiple entities and currencies, reconciling data from different sources

• Strong Excel skills, along with familiarity with Outlook, Word, and AI tools

   

Will be a plus

• Experience in a fast-growing company environment
• Familiarity with additional finance tools such as NetSuite or QuickBooks Online

🌱 We Offer

• Flexible working schedule and remote work options
• 12 paid sick days and 18 paid vacation days annually
• Healthcare & sport compensation package

🎢 Professional Growth

• English courses and professional development opportunities
• Mentorship, knowledge sharing, and clear career growth opportunities
• Participation in professional meetups, events, and internal knowledge sharing

🥳 Fun & Community

• Corporate events and team-building activities
• Membership in the IT Club loyalty program
• Memorable gifts for work anniversaries and milestones

The role is based in the Kyiv region, and we will expect you to work full-time in the office. We have a shuttle service from the nearest metro station.

About the Job

We are seeking a skilled Core Developer (Rust/ C++) for Swarm Robotics & Sensor Control with over 5 years of professional experience to join our dynamic development team. You will play a key role in building and optimizing the core architectures for the real-time control and management of robotic swarms and sensor systems. This position offers the opportunity to work with cutting-edge technologies and contribute to complex, mission-critical systems in a collaborative environment.

What is your Day to Day Mission:

• Design, develop, and maintain robust and scalable systems for swarm control and sensor management.
• Implement efficient communication protocols and real-time processing solutions for robotics.
• Collaborate closely with cross-functional teams to integrate backend components with robotics software and sensor networks.
• Optimize system performance, scalability, and reliability in a distributed robotics environment.
• Solve challenging problems using modern programming languages such as C++ and Rust.
• Participate in code reviews, architecture discussions, and software design decisions.

What you bring to the team:

• 5+ years of professional experience in backend development with a strong focus on real-time systems.
• Proficiency in Rust and C++, with a solid understanding of modern software development practices.
• Experience in building and optimizing backend architectures for distributed systems.
• Familiarity with network protocols, multithreading, and low-latency data processing.
• Knowledge of system architecture design, performance optimization, and resource management.

• Ability to work independently, solve complex technical problems, and thrive in a fast-paced startup environment.

   

Nice-to-Have:

• Experience in robotics, swarm control, or sensor integration.
• Familiarity with cloud platforms, Docker, or Kubernetes for scalable deployments.

• Understanding of embedded systems or real-time operating environments.

   

Why Quantum-Systems:

• We Stand with Ukraine
• We believe in the power of combined efforts: straightforward tech expertise paired with a customer-centric focus.
• We are industry pioneers who are ambitious, bold, and visionary.
• We push limits, think outside the box, and strive for technological excellence to shape the future of aerial data.
• We promise to be your runway for individual and professional growth.

The role is based in the Kyiv region, and we will expect you to work full-time in the office. We have a shuttle service from the nearest metro station.

About the Job

As a Flight Control Systems Engineer, you will be a key part of our Flight Controls team to solve some of the most interesting flight guidance, dynamics, and controls problems you’ll have ever heard of. Together with our world-class team, currently four team members, you will take an empowering role: pushing the boundaries of drone technologies.

You will be working closely with stakeholders from the navigation, embedded systems, and flight test departments to conceive, implement, and validate flight guidance and control system algorithms, features, and improvements. Flight Controls at Quantum-Systems - your mission will be a powerful impact.
 

What is your Day to Day Mission:

• Design and programming of flight guidance and flight control algorithms for automatic and autonomous flight
• Support in model building for flight dynamic processes and design of control and feedback control laws based on these models
• Preparation and execution of flight tests with UAS systems
• Analysis of flight data recordings as well as evaluation and processing of test results
• Generation of C/C++ code with Matlab Simulink and its integration into the FCS / autopilot framework
• Supporting the certification of our product family and obtaining flight permits, e.g. for BVLOS flight projects
• Collaboration in the further development of the product development process

What you bring to the team:

• You have completed a degree/apprenticeship in the field of aerospace engineering, mechanical engineering, automotive engineering, electrical engineering or robotics.
• You have theoretical knowledge in the field of flight mechanics and have mastered the basics of control engineering. You also have practical experience with model aircraft, multicopters and / or their subsystems.
• You have knowledge of programming with Matlab/Simulink. Fluent handling of the programming language C and Git is also desirable.
• You are privately interested in model aircraft construction, drones or robotics and can't wait to implement and try out new ideas.
• Due to your open, communicative, friendly and competent attitude, it is easy for you to be considered as an internal expert.
• You are highly self-motivated and drive your area of responsibility independently.
• Communication in English is a matter of course for you.
   

Why Quantum-Systems:

• We Stand with Ukraine!
• We believe in the power of combined efforts: straightforward tech expertise paired with a customer-centric focus.
• We are industry pioneers who are ambitious, bold, and visionary.
• We push limits, think outside the box, and strive for technological excellence to shape the future of aerial data.
• We promise to be your runway for individual and professional growth.