Jobs at Djinni

Requirements:
- At least 1 year of experience as a QA Manual Engineer; 
- Understanding of client-server architecture principles; 
- Knowledge of web protocols and the ability to test web applications (HTML5); 
- Experience with API testing tools (Postman); 
- Understanding of databases and ability to work with SQL queries; 
- Ability to analyze system logs and identify the root causes of issues (Grafana); 
- Experience in creating and maintaining test documentation (bug reports, checklists, test cases, etc.); 
- Experience working with bug tracking systems.

Responsibilities:
- Perform manual testing of the product on desktop and mobile devices;  
- Conduct regression, functional, and non-functional testing;  
- Identify, analyze, and document all programming errors and operational parameters that do not match the project specifications; 
- Maintain test documentation (bug reports, test cases, checklists, etc.);  
- Report detected errors in company products and help ensure they get fixed;  

WHAT WE OFFER:
Full-time remote position with stability and career growth opportunities.
Ukrainian holidays off, plus paid vacation and sick leave.

About the Role
We are seeking proactive and results-driven talents to support our global expansion by acquiring and managing high-quality users.
This role focuses on identifying, engaging, and converting individuals into verified, active users on the platform, while maintaining long-term engagement and performance.

Key Responsibilities:
 

• Build & maintain relationships with individuals, communities, or agencies who can refer quality users.
• Identify and onboard potential users, promote platform features and ensure that all users comply with platform standards — real identity verification, authentic behavior, and consistent activity.
• Build successful user acquisition campaigns throughout different social media channels (Facebook, Tik Tok, Instagram).
• Monitor and analyze user performance using internal reporting tools.
• Stay up to date on local trends in social networking, entertainment, and user engagement.

Requirements:
 

• Deep understanding of local online culture, trends, and user behavior
• Proven experience in business development, user acquisition, influencer / agency partnerships, or online community management. Candidates from modelling agency or with the wide network of KOLs/streamers will be preferred
• Strong communication and negotiation skills in both local (Spanish) and English languages.
• Familiarity with social media platforms, communication apps, or online
  community tools.
• Ability to work independently and comfortable working in a dynamic,
  startup-like environment with performance-based goals.
• Analytical mindset — able to interpret data and optimize performance.

We are looking for a Senior Solution Engineer to join our team and support the successful integration and deployment of autonomous systems.
 

In this role, you will serve as the primary technical interface for partners, helping them integrate and deploy software and hardware solutions into their platforms. You will work closely with partners to understand their technical requirements, configure and adapt existing solutions, contribute to software development, and ensure successful implementation.
 

You will collaborate with cross-functional engineering teams to solve complex technical challenges, support product improvements, and help deliver reliable, high-quality solutions. This role is ideal for an engineer who enjoys combining hands-on technical work with customer collaboration and system-level problem solving.
 

Responsibilities:

• Serve as the primary technical point of contact for partners throughout integration and deployment projects
• Integrate partner systems with software and hardware solutions both remotely and on-site
• Configure, customize, and adapt existing solutions to meet partner requirements
• Contribute to the development of software solutions, from standalone applications and plugins to the main software codebase
• Manage software releases, including build preparation, release creation, testing, and resolving release-related issues
• Validate software releases before they are delivered to operational teams
• Collaborate with product and engineering teams to deliver new features and improvements
• Translate partner requirements into clear technical specifications aligned with product capabilities
• Troubleshoot software, hardware, and system integration issues, escalating complex challenges when required
• Support system validation, field testing, and deployment activities
• Contribute to technical documentation and continuous improvement of engineering processes
   

Requirements:

• Experience working directly with partners or customers in a technical engineering environment
• Strong proficiency in Python, C++, and Linux (Ubuntu)
• Experience integrating hardware components into embedded systems
• Basic hands-on hardware experience and understanding of fundamental electronics principles
• Solid understanding of embedded communication protocols (CAN, I2C, SPI, etc.)
• Experience with electrical and/or mechanical system design
• Ability to design wiring diagrams and apply best practices to minimize electrical interference
• Understanding of control theory and flight control
• Hands-on experience with multicopter and fixed-wing UAVs
• Strong analytical, troubleshooting, and problem-solving skills
• Excellent communication skills and the ability to collaborate effectively with cross-functional teams
• Willingness to travel for on-site integration, testing, and deployment activities
   

We Offer:

• Official employment under Ukrainian labor law
• Military booking
• Medical insurance
• Individual English lessons
• Stock Options
• Opportunity to work on cutting-edge UAV systems and grow professionally

Complete interview process:

• Intro call with recruiter → HR interview → Technical interview → Final interview with the team's leadership → Pre-offer → Security check

We are looking for a Manual QA Engineer to join our internal QA team. You will work on multiple long-term projects across different domains, collaborating closely with developers, Product Managers, and other QA engineers. The role is focused on ensuring high product quality through functional, regression, integration, API, and mobile testing, while contributing to the continuous improvement of QA processes within the company.

This is a long-term remote position with a collaborative team environment.
 
Working hours: 4:00 PM – 1:00 AM Kyiv time (equivalent to 9:00 AM – 6:00 PM EDT)- aligned with our US-based team

Requirements

• 3+ years of commercial experience in Manual QA.
• Strong experience testing web applications.
• Experience testing mobile applications (iOS and Android).
• Good understanding of functional, regression, integration, smoke, and exploratory testing.
• Experience creating and maintaining test documentation (test cases, checklists, bug reports).
• Experience with API testing using Postman or similar tools.
• Familiarity with SQL for basic database validation.
• Experience working with Jira and Confluence (or similar tools).
• Understanding of SDLC and Agile/Scrum methodologies.
• Strong analytical thinking and attention to detail.
• English level: Upper Intermediate (B2) or higher.
   

Will be a plus

• Experience working with fintech, healthcare, SaaS, or other complex business domains.
• Experience with Charles Proxy, Proxyman, BrowserStack, or similar tools.
• Basic knowledge of test automation (Playwright, Selenium, Cypress) and willingness to grow in this direction.
• Experience testing REST APIs using Swagger.
   

Responsibilities

• Perform functional, regression, integration, smoke, and exploratory testing.
• Test web and mobile applications across different platforms and devices.
• Create, maintain, and execute test cases, checklists, and test reports.
• Perform API testing and validate backend functionality.
• Identify, document, and verify defects using Jira.
• Participate in requirements analysis and provide QA feedback during feature planning.
• Collaborate closely with developers, Product Managers, Designers, and other QA engineers.
• Contribute to improving QA processes and maintaining high product quality across projects.
• Participate in release verification and production validation when required.

UI/UX Designer

We’re looking for a UI/UX Designer to join our team and help create engaging designs for digital products and marketing campaigns. This role is ideal for someone eager to learn, develop their skills, and work in a collaborative environment.

Responsibilities

• Create visual assets for websites, landing pages, and marketing materials
• Design social media graphics, banners, and promotional content
• Assist with UI elements for digital products
• Follow brand guidelines and maintain visual consistency
• Collaborate with marketing, product, and development teams
• Prepare design files for developers

Requirements

• Experience with Figma, Adobe Photoshop, or Illustrator
• Understanding of layout, typography, and color theory
• Portfolio showcasing design work (personal or academic projects are welcome)
• Attention to detail and willingness to learn
• Ability to work well in a team

Nice to Have

• Basic knowledge of UI/UX principles
• Experience designing web or mobile interfaces
• Basic understanding of HTML/CSS

What We Offer

• Opportunities for professional growth
• A creative and supportive team
• Competitive salary based on experience
• Ongoing learning and development

We are an iGaming company with over three years of experience and a team of 1300+ specialists. Our portfolio includes 10+ successful projects operating across Tier 1–3 markets.

As we continue scaling and launching new products, we are looking for a strong, strategic CMO who will take full ownership of marketing for one of our key GEOs - including both acquisition and brand development.

This role is about building a scalable, profitable, and sustainable growth engine, covering all traffic channels and shaping the long-term marketing vision of the product.

We provide full support, strong infrastructure, and all the resources needed to deliver results and make a real impact.

What You'll Be Doing

• Own and drive full-cycle marketing for a GEO: acquisition + brand
• Build and scale the entire marketing function from scratch: strategy, structure, processes, and team
• Manage and grow all key channels: Paid Social (FB, TikTok), Google Ads / UAC, SEO (brand / non-brand), ASO, Influencer & Streamer marketing, Affiliate networks
• Develop and execute both performance and brand strategies
• Ensure high-quality traffic using BI tools, fraud detection, and performance analytics
• Build and scale affiliate programs and strategic partnerships
• Collaborate closely with product teams (landings, funnels, A/B testing, localization)
• Own budgeting and financial planning: manage $500K+ monthly budgets, optimize channel mix, track ROI / CPA / ARPU
• Analyze user journeys (CJM), identify bottlenecks, and improve conversion & retention
• Lead, hire, and develop cross-functional marketing teams

What Experience Matters to Us

• 5+ years in iGaming / gambling / betting marketing
• 3+ years in a leadership role (CMO / Head of Marketing / Head of Growth)
• Proven experience managing both acquisition and brand marketing
• Deep understanding of performance metrics: FTD%, ARPU, LTV, ROI
• Hands-on experience with all major channels: Paid Social, Google, SEO / ASO, Influencers, Affiliates
• Strong partner management and deal optimization skills
• Confident managing $500K+ budgets and scaling to 10K+ FTDs
• Strong analytical mindset, BI tools experience, and media planning
• Understanding of unit economics, CJM, and funnel optimization
• Knowledge of compliance and marketing specifics in regulated / emerging markets

Why You Should Join Us

• Full ownership of marketing strategy and real impact on business results
• Freedom to build your own team, processes, and vision
• Strong products, budgets, and internal infrastructure
• Fast decision-making, no micromanagement
• Competitive salary + performance-based bonuses
• Fully remote setup + coworking support
• Access to top industry conferences and internal events
• Paid vacation, sick leave, and birthday day off
• Investment in your professional and personal growth

We are building a high-performance environment where marketing directly drives business growth.

If you’re ready to own the full marketing engine and scale a product globally — let’s talk 🚀

📍 Remote | Ukraine | iGaming

ABOUT THE COMPANY

We are an iGaming company with over 4 years of experience and a team of 1300+ specialists. Our portfolio includes 13+ successful projects operating across Tier 1–3 markets.

As we continue scaling and launching new products, we are looking for a strong, strategically-minded Head of Partner Network who will take full ownership of the affiliate direction for the group's key brands.

ABOUT THE ROLE

Senior strategic leadership role. You will build the partner network from the ground up, design the organizational model, own the P&L of the affiliate direction, and drive sustainable traffic growth for the group's brands. Not an operational affiliate manager position - an architect and owner role for the entire direction.

WHAT YOU WILL DO

• Building the Partner Network: org model and roles, positioning and go-to-market strategy, 12-month roadmap, onboarding/quality control/payouts/anti-fraud processes.
• Growing the Partner Network: attracting and developing webmasters/partners, long-term relationships, incentive mechanics.
• Traffic & Performance: planning traffic volumes and distribution across brands, quality control, financial planning and margin management, KPI ownership.
• Team Management: hiring affiliate managers/bizdev/support, performance-driven culture, developing the management structure.

WHAT WE ARE LOOKING FOR

• 5+ years in iGaming/gambling/betting marketing;
• 3+ years in a leadership role (CMO/Head of Affiliate);
• Proven experience managing both acquisition and brand marketing;
• Deep understanding of FTD%, ARPU, LTV, ROI;
• Hands-on experience with Paid Social, Google, SEO/ASO, Influencers, Affiliates; strong partner management and deal optimization;
• Confident managing $500K+ budgets, scaling to 10K+ FTDs;
• Strong analytical mindset, BI tools, media planning;
• Understanding of unit economics, CJM, funnel optimization;
• Knowledge of compliance in regulated/emerging markets.

WHY JOIN US

• Full ownership of marketing strategy and real impact on business results
• Freedom to build your own team, processes, and vision
• Strong products, budgets, and internal infrastructure
• Fast decision-making, no micromanagement
• Competitive salary + performance-based bonuses
• Fully remote setup + coworking support
• Access to top industry conferences and internal events
• Paid vacation, sick leave, and birthday day off
• Investment in your professional and personal growth

This is a fantastic opportunity to join a fast-growing company at the heart of the digital revolution. Our software product is revolutionising manufacturing through automation. We are trusted by global brands and work across sectors (mobility, consumer goods, machinery etc).

We have a talented and ambitious team. We value integrity and are passionate about our mission to revolutionise advanced manufacturing.

This is your opportunity to:

• Accelerate your career in an open, innovative product company.
• Work with a highly talented team to solve complex problems using the latest technologies.
• Share in our ambitious vision and make a meaningful difference towards autonomous manufacturing.
   

Responsibilities:

• Source and recruit candidates for roles.
• Screen candidates resumes and job applications.
• Manage the interviewing process.
• Provide analytical and documented recruiting reports to the rest of the team.

• Develop & execute a recruitment strategy.

   

You will be joining a well-versed team if you have:

• University degree.
• Fluent in English.
• Currently live in Vinnytsia.

This is a fantastic opportunity to join a fast-growing company at the heart of the digital revolution. Our software product is revolutionising manufacturing through automation. We are trusted by global brands and work across sectors (mobility, consumer goods, machinery etc).

We have a talented and ambitious team. We value integrity and are passionate about our mission to revolutionise advanced manufacturing.

This is your opportunity to:

• Be part of an AI product company in advanced manufacturing.
• Be part of a research focused team.

Responsibilities: 

• Research, test and develop generative AI based solutions.
• Collaborate with mechanical engineers to enhance your research.
• Design and implement end-to-end AI solutions that integrate with existing systems.
• Collaborate with software engineers and product teams to understand business needs and translate them into technical solutions. 
• Research emerging AI trends and techniques to continually improve the AI solution offerings. 
• Prepare and maintain documentation on design, code, and processes to ensure organizational knowledge retention. 
• Monitor and evaluate the performance of AI systems in production, identifying areas for improvement or further development.

You will be joining a well-versed team if you have:

• Bachelor’s or Master’s degree in Computer Science, Engineering, Mathematics, or a related field. 
• Proven experience in developing generative AI or machine learning models.
• Commercial experience in using large language models.
• Programming skills in languages such as Python or JavaScript.
• Familiarity with databases (SQL, NoSQL). 
• Solid understanding of deep learning, NLP, computer vision, or other specialized areas within AI is a plus. 
• Excellent problem-solving skills and the ability to work in a fast-paced, collaborative environment.
• Good communication skills and the ability to translate complex technical concepts to non-technical stakeholders. 
• Commitment to continuous learning and development in the field of AI and emerging technologies

This is a fantastic opportunity to join a fast-growing company at the heart of the digital revolution. Our software product is revolutionising manufacturing through automation. We are trusted by global brands and work across sectors (mobility, consumer goods, machinery etc).

We have a talented and ambitious team. We value integrity and are passionate about our mission to revolutionise advanced manufacturing.

This is your opportunity to:

• Be part of a fast-growing software product company in advanced manufacturing.
• Learn and fulfil your potential in an open, knowledge-driven culture.
• Share in our ambitious vision and make a meaningful difference towards autonomous manufacturing.

Responsibilities: 

• Development of new features and new parts of the app.
• Work in a cross-functional Scrum team alongside Frontend and QA Engineers.
• Maintaining, improving and extending existing functionality.
• Сonstantly improving code organization and evolving application design.

You will be joining a well-versed team if you have:

• Bachelor’s Degree or Master’s Degree in Computer Science.
• Minimum of three years of experience in Node.JS development.
• Minimum of two years of experience in React.JS development.
• Experience with Sequelize, PostgreSQL, database design, microservices.
• Test automation coverage.
• Understanding of CI/CD.
• Git branching strategies.
• Scrum Agile principles and processes.
• English level - Intermediate and higher.

 Nice to have:

• AI-minded engineering mindset – ability to creatively apply AI tools and approaches to accelerate development and problem-solving.
• Experience using Cursor or AI-powered development workflows.
• Passion for continuous learning and exploring emerging technologies.

Our tech stack: microservices, Node.JS, React.JS, PostgreSQL, Kubernetes, AWS.

About TEKTELIC

TEKTELIC is a global leader in LoRaWAN IoT, providing carrier-grade gateways, sensors, and end‑to‑end solutions for Industrial, Building Automation, Asset Tracking, and Medical IoT. Our solutions help enterprises reduce costs, improve operations, and scale reliably across thousands of connected devices.
 

About the Role

You will act as a key point of coordination between customers, the EU sales team, and internal operations.
 

This is a fast-paced, detail-oriented role with significant ownership, ideal for someone building a career in operations within a product-based organization.

Working hours: 9 AM-6 PM Kyiv time.
 

Key Responsibilities

Sales & Order Management

• Serve as a primary point of contact for customer inquiries related to quotes, orders, and delivery status
• Follow up on submitted RFQs/RFPs 
• Maintain and update customer records including contact, shipping, and billing information
   

Logistics & Delivery Execution

• Communicate delivery schedules and status updates to customers and internal stakeholders
   

Operations Coordination

• Coordinate with production, supply chain, and finance teams to ensure timely order fulfillment

  
   

Required Skills & Qualifications

• 2+ years of experience in Customer Support 
• Experience supporting B2B customers, ideally across European markets
• Strong communication and customer service skills
• High attention to detail and accuracy
• Ability to manage multiple priorities in a fast-paced environment
• Structured, problem-solving mindset
• Upper-Intermediate English
  
   

What We’re Looking For

• A strong communicator who effectively bridges customers, sales, and operations
• A proactive, hands-on coordinator 
• Someone comfortable balancing commercial support with operational execution
• A reliable team player aligned with EU working hours and able to support a distributed team
   

What we offer

• Ongoing opportunities and personal growth in a leading Canadian company
• Competitive compensation + PE accounting support
• Well-being program (250 USD per year)
• Opportunity for career growth in the dynamic field of IoT
• Collaborative and innovative work environment
• Paid Time-off and an additional week off during Christmas Holidays
• Flexible work setup (Kyiv office or remote in Kyiv) and a supportive, international team
• Health insurance
• Engaging social events

FTE: Full-time (40 h per week)
Timeline: 3-6 months (tbd)
Start: ASAP
English: B2
Recruitment process: a tech check with our client, then an interview with the main client

The company
A well-established B2D (business-to-developer) SaaS platform operating at significant scale. Their product is infrastructure-level - real-time connectivity used by developers worldwide.

The team
~6–7 people: tech lead, PM, delivery manager, 3 web engineers + contractors. Small, tight-knit, opinionated. Standups Monday and Friday.

The role
One senior hire. This is a product-minded engineering role, not ticket execution. They’re shifting away from reactive delivery toward engineers who understand customers and drive outcomes.

Tech stack
React + TypeScript (frontend), Ruby on Rails (backend), some Node/TS services, Postgres.

What they’re looking for

• Developer empathy - you build tools for developers, you get the frustrations firsthand
• Product thinking - question requirements, propose what should be built
• Ownership - concept to shipped with minimal hand-holding
• Proactive communicator
• Comfortable with AI coding assistants (they use them actively)
• Design + UX intuition

We’re looking for more than just a User Acquisition - we’re looking for someone who thinks strategically, takes ownership, and knows how to turn large budgets into consistent performance.

What we're looking for:

• 2+ years of hands-on experience with Snapchat Ads.
• Experience managing monthly advertising budgets from $30K to $150K+.
• Strong analytical mindset with the ability to optimize campaigns based on performance data.
• A proactive, ownership-driven approach to work.
   

What you'll do:

• Build and scale the Snapchat acquisition channel from scratch.
• Launch, test, and validate new ideas, creatives, and growth strategies.
• Continuously analyze traffic performance and identify optimization opportunities.
• Take full ownership of campaign performance and budget efficiency.
• Work closely with the team to drive sustainable growth.
   

What we're looking for in you:

• You're a true doer who takes initiative instead of waiting for tasks.
• You learn quickly and enjoy exploring new opportunities and approaches.
• You're comfortable managing significant budgets and taking full responsibility for performance.

• You're ambitious and interested in growing into a Head of Media Buying role in the future.

   

We offer:

• Work in an international team.
• Remote work.
• Competitive salary and performance bonuses.
• Opportunities for professional growth.
• Paid vacation and sick leave.

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