Jobs at Djinni

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.

We are looking for a Project Manager/Coordinator (Lviv!) who will manage our bright IT Security Consulting team.

We are looking for a Personality with remarkable communication skills, previous experience in managing client expectations and engineering teams, attention to detail, and the ability to work cross-functionally, converting talented engineers into a high-performance team.

The new Manager will join our outstanding Delivery Leadership team. The ideal candidate doesn’t hesitate to manage talents, clients and project success.

Responsibilities:

• Coordinate and manage multiple short-term cybersecurity projects related to penetration testing and security consulting.
• Plan and manage team workload and resource allocation across ongoing projects.
• Monitor project execution, ensuring timely delivery, quality standards, and client satisfaction.
• Act as the main coordination point between clients and internal technical teams during project execution.
• Track project progress, identify risks or blockers early, and propose solutions.
• Coordinate engineers’ work across multiple engagements and ensure smooth project flow.
• Support team collaboration and maintain clear communication within the delivery team.

• Ensure projects follow UnderDefense delivery processes and operational standards.

   

Qualifications:

• At least 2+ years of project management experience.
• Experience in managing 10+ people.
• Excellent written and verbal communication skills, both Ukrainian and English.
• Practical experience in implementing scope, quality, and time management principles.
• Good knowledge of JIRA.

Personal qualities:

• A passion for challenges and courage to manage people.
• Being self-motivated, able to multitask, reliable to deliver on time, a quick-thinker, and able to work in a fast-paced work environment.
• Strong organizational, negotiation, and conflict-resolution skills.
• Know and practice active listening techniques.

Nice to have:

• Technical background.
• Some knowledge of the cybersecurity domain.

About other benefits:

• Competitive compensation package with opportunities for career advancement.
• Innovative and dynamic work environment focused on product development.
• Opportunities for global collaboration with teams around the world.
• Paid time off including vacation and sick leave.
• Reimbursement for professional development activities such as conferences and certifications.
• Health and wellness benefits including internal medical insurance.
• Social events and team-building activities to foster a positive work culture.
• Minimal bureaucracy to ensure efficiency and productivity.

• We are developing a platform that receives securities and price data from multiple providers, enriches and validates it, and distributes the consolidated data to internal bank systems. Our team manages various web and desktop applications, web services, and Linux environments that enable visualization of securities and execution of related workflows.
  
  Our components are built using Java 8-11, JavaScript/TypeScript, Oracle, and Spring 4-5, including Spring Boot.

   

• Responsibilities:

  - Develop back-end systems using Java with well-tested code.
  - Support the development environment, primarily through automation using Jenkins CI and Bash.
  - Evaluate and implement new development tools, libraries, and methodologies to enhance quality.
  - Conduct peer code reviews for changes in the project codebase.
  - Collaborate effectively with a global team across multiple time zones, demonstrating strong verbal and written communication skills.
  - Provide constructive suggestions and alternative solutions to team members to identify the most efficient and optimized approaches.

   

• Mandatory Skills Description:

  The role requires extensive expertise in Java SE and Java EE with over a decade of professional experience, emphasizing strong proficiency in the Spring framework, including Boot, IoC, MVC, AOP, Security, Data, JDBC, and testing components. The candidate must be skilled in SQL and relational databases, specifically Oracle, and have a solid understanding of Servlets, servlet containers such as Tomcat, and application servers like Weblogic. Familiarity with CI/CD processes and tools, notably TeamCity and Jenkins, is also essential.
  
  Hard skills include:
  - Advanced Java SE and Java EE development
  - Comprehensive Spring framework application
  - SQL query writing and database management using Oracle
  - Knowledge of Servlets, Tomcat, and Weblogic server environments
  - Experience with CI/CD pipelines using TeamCity and Jenkins
  - Practical Linux system navigation, file and permission management, user and group administration, process and service handling, security keys and certificates, and basic Bash scripting
  
  Soft skills focus on:
  - Analytical problem-solving to identify and implement effective, maintainable solutions
  - Collaborative discussion and consensus-building within the team to select optimal approaches

   

• Nice-to-Have Skills Description:

  - Proficiency in Angular or similar frameworks (React, Vue), including Angular Material and RxJs, demonstrating capability in modern front-end development.
  - Ability to design and implement visually appealing and functional HTML/CSS layouts.
  - Strong expertise in Oracle database management and operations.
  - Familiarity with ELK stack for logging, monitoring, and data analysis.
  - Experience working with Spring Cloud modules and developing microservice architectures.

   

• Languages:
  • English: B2 Upper Intermediate

About us:

EveryMatrix is a leading B2B SaaS provider delivering iGaming software, content and services. We provide casino, sports betting, platform and payments, and affiliate management to 200 customers worldwide.

But that's not all! We're not just about numbers, we're about people. With a team of over 1000 passionate individuals spread across twelve countries in Europe, Asia, and the US, we're all united by our love for innovation and teamwork.

EveryMatrix is a member of the World Lottery Association (WLA) and European Lotteries Association. In September 2023 it became the first iGaming supplier to receive WLA Safer Gambling Certification. EveryMatrix is proud of its commitment to safer gambling and player protection whilst producing market leading gaming solutions.

Join us on this exciting journey as we continue to redefine the iGaming landscape, one groundbreaking solution at a time.

We are looking for a passionate and dedicated AI Engineer to join our team in Lviv!

About the job:

We’re looking for an AI/ML Engineer to support and build AI-powered solutions that enhance automation, analytics, and intelligent workflows across our products. You’ll work with modern LLMs, AI agents, retrieval systems, and scalable backend services, taking ideas from prototype to production in a fast-moving environment and building scalable solutions in a high-impact domain. The ideal candidate for us has strong software engineering fundamentals, practical experience with generative AI systems, and hands-on experience building robust pipelines and production-grade solutions.

What You'll get to do:

• Design, develop, and deploy AI-powered applications and services.
• Integrate LLMs and AI APIs into production systems.
• Build and optimize RAG pipelines, embeddings workflows, and vector search solutions.
• Develop AI agents and workflow automation systems.
• Work with structured and unstructured data for AI-driven use cases.
• Collaborate with Data Engineers and Backend Engineers on scalable infrastructure.
• Monitor AI system performance, quality, latency, and cost efficiency.
• Experiment with prompt engineering, fine-tuning, and model evaluation techniques.
• Participate in architecture discussions and contribute to technical decision-making.

What You need to know:

• Degree in Computer Science, Mathematics, Engineering, or equivalent field.
• 3+ years of hands-on experience in applied AI-engineering.
• Strong programming skills in Python.
• Experience working with LLMs and modern AI frameworks such as LangChain, LlamaIndex, or similar.
• Understanding of RAG architectures, embeddings, vector databases, and semantic search.
• Experience integrating external APIs and cloud-based AI services.
• Knowledge of REST APIs, microservices, and scalable backend architectures.
• Familiarity with Docker, CI/CD, and cloud platforms, especially GCP.
• Strong problem-solving skills and ability to work independently.
• Interest in AI automation, intelligent systems, and applied generative AI solutions.
• Experience in Python backend engineering will be a plus.
   

Here's what we offer:

• Start with 22 days of annual leave, with 2 additional days added each year, up to 32 days by your fifth year with us.
• 3 sick leave days per year, no doctor's note required; 30 medical leave days with medical allowance
• Hybrid work schedule is available after the first three months of employment with 80/20 office/home format until the end of 2026. Starting from 2027, the policy will transition to primarily office-based work, with up to 10 work-from-home days per year with manager approval.
• Benefit from two Free Fridays each year, limited to one per quarter.
• Daily catered lunch or monthly lunch allowance. 
• Private Medical Subscription. 
• Access online learning platforms like Udemy for Business, LinkedIn Learning or O’Reilly, and a budget for external training.
• Gym allowance.
• Corporate English lessons.
• Support for New Parents:
• 21 weeks of paid maternity leave, with the flexibility to work from home full-time until your child turns 1 year old.
• 4 weeks of paternity leave, plus the flexibility to work from home full-time until your child is 13 weeks old.

Our office perks include on-site massages and frequent team-building activities in various locations.

At EveryMatrix, we're committed to creating a supportive and inclusive workplace where you can thrive both personally and professionally. Come join us and experience the difference!

We are looking for an experienced Senior C++ Engineer to work on large-scale desktop software products. The role focuses on performance optimization, stability improvements, modernization of legacy systems, and development of high-quality desktop applications.

Key Responsibilities

Develop and maintain C++ desktop application components.

Implement multithreading and concurrency solutions.

Analyze and resolve performance bottlenecks.

Support modernization of legacy codebases.

Collaborate with architecture, QA, and product teams.

Utilize AI-assisted development tools to accelerate development and refactoring activities.

Required Skills

Several years of senior-level C++ development experience.

Strong expertise in modern C++ (C++14/17/20).

Solid knowledge of multithreading, concurrency, debugging, and performance tuning.

Hands-on experience with:

Qt

CMake

Conan

MSVC

CEF integration

Strong analytical and problem-solving skills.

Nice to Have

Experience with AI-assisted coding tools and workflows.

Experience in regulated software environments.

Technical degree or equivalent practical experience.

German language skills are a plus.

Engagement

Full-time involvement expected

Initial duration approximately 6 months

The Senior Prior Authorization Associate is responsible for managing the end-to-end prior authorization process for ABA (Applied Behavior Analysis) services, ensuring authorizations are obtained accurately and on time to prevent any disruption to client care. This role requires strong payer knowledge, sharp attention to detail, and the ability to independently manage a high volume of complex cases, including denials, appeals, and peer-to-peer coordination.

The Senior Prior Authorization Associate will also ensure timely authorization approvals, conduct 100% quality audits, and provide & handle escalated Authorization Cases.

Key ResponsibilitiesIntake Operations

• Manage and monitor incoming tickets, referrals, and fax queues
• Ensure all intake requests are triaged, responded to, and completed on time
• Maintain SLA adherence and optimize turnaround times
• Ensure accurate patient intake, insurance verification, and data entry

• Prioritize urgent cases to prevent delays in care

   

Prior Authorization Oversight

• Oversee end-to-end prior authorization processes
• Ensure authorizations are obtained timely and prior to patient visits
• Track pending requests and follow up with payers

• Handle escalated delays and complex cases as needed

   

Quality Assurance

• Conduct 100% audit of auth output (intake and auth)
• Ensure compliance with payer guidelines and internal standards
• Identify errors, trends, and implement corrective actions

• Serve as escalation point for issues and bottlenecks

   

Training & Development

• Train, onboard, and coach auth co-workers
• Develop SOPs and workflow documentation

• Provide continuous feedback to improve quality and efficiency

   

Collaboration

• Work closely with scheduling, billing, and clinical teams
• Communicate intake and authorization updates proactively
• Partner with leadership to improve RCM performance

Qualifications Required

• 3+ years of experience in Revenue Cycle Management (RCM)
• Experience working in an Outpatient ABA Therapy Clinic
• Experience working in TX behavioral health market
• Experience working in authorization-related denials
• Strong knowledge of intake, insurance verification, and prior authorizations
• Experience managing work queues (tickets, faxes, referrals)

• Prior supervisory experience

   

Preferred

• Experience with EMR/EHR systems
• Familiarity with U.S. insurance payers and authorization rules
• Process improvement experience is a plus

Skills

• Strong attention to detail and accuracy
• Excellent communication and leadership skills
• Ability to manage multiple priorities in a fast-paced environment

• Problem-solving and analytical mindset

   

Key Metrics for Success

• Intake turnaround time (TAT)
• Authorization turnaround and approval rates
• Queue resolution times
• Audit accuracy (target: 100%)
• Reduction in authorization-related denials

Experience:

• RCM: 3 years (Required)

Work Location: Remote

We're looking for an L&D Manager to build the learning and development function at True Group from the ground up. There is no existing LMS, no structured onboarding tracks, no co-funding process — you'll design and launch all of it, then own it long-term.

This is a role for someone who believes that learning is a business driver, not an HR add-on. You'll work closely with HR Operations, team leads and managers across all our structure to identify what people need to grow — and then build the infrastructure and programmes to make it happen. Your work will directly impact how fast new employees get up to speed, how managers develop their teams, and how the company retains its best people.

HOW YOU WILL MAKE AN IMPACT

• Select, configure and launch the LMS platform: define requirements, structure the content catalogue, integrate with PeopleForce and Notion, and keep it running
• Run a company-wide Learning Needs Assessment — identify skill gaps by role and level, and turn findings into a prioritised learning roadmap
• Develop and deliver internal programmes: role-specific hard skills, soft skills, management development, 1:1 and PRP practices
• Build and maintain the welcome course and role-based onboarding tracks for the first 30/60/90 days — in partnership with HR Ops and team leads
• Organise internal workshops and knowledge-sharing sessions with internal experts as trainers
• Build and manage the co-funding policy: approval criteria, budget limits, provider registry and ROI reporting
• Own the annual learning budget: plan, defend it to the business and track spend
• Maintain the company knowledge base in Notion: structure, keep it current and easy to navigate
• Measure learning effectiveness: pre/post assessments, 30-day follow-up and course NPS
• Regularly update content — replace what's outdated, add what's needed

WHAT WILL HELP YOU SUCCEED IN THE ROLE

• 3+ years in L&D, Training or a related HR function
• Hands-on experience selecting and launching an LMS platform
• Proven ability to design and deliver learning programmes — not just coordinate external training
• Strong project management skills: you can run multiple initiatives simultaneously without dropping the ball
• Data-driven approach: you measure what you build and iterate based on results
• Comfortable working with managers and C-level to identify needs and communicate learning impact
• Experience with co-funding or external learning management is a plus
• Familiarity with Notion, PeopleForce and LMS platforms
• Upper-Intermediate English (B2+)
• iGaming, digital or tech background is a plus

WHY YOU’LL LOVE IT HERE:

• Flexible working hours and a remote work setup, so you can plan work around your life and not your life around work!
• Unlimited vacation days and paid sick leave - because your rest matters.
• A competitive compensation that truly reflects your skills and expertise.
• Gifts to celebrate your special occasions.
• 50% financial support for learning expenses to supercharge your professional growth!
• A positive atmosphere where you always feel respected and truly belong.
• Inspirational team-building activities that turn colleagues into best friends.
• Wellness benefits: We’ll support your sports passions, from yoga classes to gym memberships.

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 Data Engineer, who will be embedded in the Data Platform team of a global mining organisation, helping design and deliver a modern Azure-native data infrastructure. The team ingests data from dozens of operational sources — including REST and SOAP APIs, IoT sensors, ERP systems, and flat-file feeds — transforming it into curated, analytics-ready datasets that drive decisions across finance, operations, and supply chain.

This is a hands-on engineering role. You will spend most of your time building and maintaining robust pipelines, optimising data flows within Azure Synapse and Databricks, and ensuring the platform remains reliable, scalable, and secure.

Key Responsibilities:

• Gather and analyse business requirements to identify and prioritise integration opportunities.
• Design, build, and maintain scalable data pipelines using Azure Data Factory to orchestrate ingestion from diverse source systems.
• Develop and optimise data transformation logic and analytical workloads in Azure Synapse Analytics (dedicated and serverless SQL pools, Synapse Pipelines).
• Build and maintain Databricks notebooks and jobs (PySpark / Spark SQL) for large-scale data processing and feature engineering.
• Implement robust API extraction patterns — REST and SOAP — handling pagination, authentication (OAuth 2.0, API keys), rate limiting, and error recovery.
• Design and maintain the lakehouse architecture: raw, curated, and serving layers using Azure Data Lake Storage Gen2.
• Ensure data quality through validation frameworks, monitoring pipelines, alerting, and lineage documentation.
• Collaborate with Analytics Engineers and data consumers to understand downstream requirements and model data accordingly.
• Apply best practices for CI/CD, infrastructure-as-code (Azure DevOps, Terraform / Bicep), and environment management.
• Participate in data governance activities including metadata management, access control, and documentation.

Requirements:

• 4+ years of experience in data engineering or a closely related software engineering role.
• Strong analytical and communication skills
• Strong hands-on experience with Azure Data Factory — authoring pipelines, triggers, linked services, and data flows.
• Solid experience with Azure Synapse Analytics — SQL pools, Synapse Pipelines, and integration with ADLS Gen2.
• Proven experience with Databricks — PySpark, Delta Lake, job clusters, and Unity Catalog is a plus.
• Strong API extraction skills: designing reliable ingestion from REST and SOAP endpoints, handling complex authentication and error scenarios.
• Proficiency in SQL (T-SQL or Spark SQL) and Python for data manipulation and pipeline scripting.
• Familiarity with data modelling concepts: star/snowflake schemas, data vault, or medallion architecture.
• Experience with Azure DevOps for source control (Git), CI/CD pipelines, and automated deployments.
• Understanding of data security, role-based access control (RBAC), and encryption in Azure.
• Strong problem-solving mindset and ability to work autonomously in a distributed team environment.

Nice to have:

• Experience with Azure Purview for data cataloguing and governance.
• Knowledge of streaming data patterns (Azure Event Hubs, Kafka, Spark Streaming).
• Familiarity with dbt or similar SQL-based transformation frameworks.
• Background in mining, heavy industry, or operational technology (OT) data environments.
• Power Platform awareness (not required, but beneficial for understanding downstream consumers).

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*benefits are not applicable for freelancers

We are seeking a Senior Test Automation Engineer with strong experience designing and implementing automated quality assurance strategies across desktop, web, and backend systems. The role emphasizes scalable automation, performance validation, CI/CD integration, and continuous quality improvement.

Key Responsibilities

Design and own end-to-end test automation strategy.

Implement and maintain test automation frameworks.

Build and improve CI/CD-based quality gates.

Perform stress, load, and performance testing.

Partner closely with developers and architects to improve product quality.

Leverage AI-assisted testing and automation capabilities.

Required Skills

Several years of senior test automation experience.

Expertise across multiple testing layers:

Unit testing

Integration testing

System testing

UI testing

Performance testing

Stress testing

Strong programming skills in at least one of: C#, Java, Python ot TypeScript

Experience with CI/CD pipelines and version control.

Experience with modern automation tools such as: Playwright, Cypress, Ranorex or GitLab CI

Nice to Have

C# development background.

Penetration testing experience.

ISTQB certification.

Experience with AI-assisted development and testing tools.

Experience in regulated industries.

Engagement

Full-time involvement expected

Initial duration approximately 6 months

Fluent English required

German language skills are an advantage

David AI is looking for an Engineering Manager / Tech Lead with 6+ years of product-focused full-stack engineering experience to lead and grow the engineering team.

You will partner closely with the CTO to define technical direction, ship core products powering an audio data research platform, and help build a high-performing engineering team at one of the fastest-growing AI infrastructure companies.

This is a high-ownership role for someone who combines strong hands-on engineering background with engineering leadership, product thinking, and the ability to make decisions in ambiguous, fast-moving startup environments.

What you will do

• Lead and grow the engineering team through a rapid scaling stage.
• Partner closely with the CTO on technical direction, architecture, and product execution.
• Ship core products for an audio data research platform.
• Build and improve scalable full-stack systems using Next.js, TypeScript, and PostgreSQL.
• Design and ship data-intensive products and scalable data processing pipelines.
• Own technical decisions in highly ambiguous and fast-moving environments.
• Support engineering quality, delivery speed, and team performance.
• Help turn zero-to-one product ideas into production-ready systems.

What we are looking for

Must-have:

• 6+ years of product-focused full-stack engineering experience.
• Experience leading engineering teams through rapid growth at high-growth startups.
• Strong full-stack web development experience with Next.js, TypeScript, and PostgreSQL.
• Experience shipping zero-to-one products end-to-end.
• Experience with data-intensive systems or scalable data processing pipelines.
• BS in Computer Science or equivalent technical degree.
• Strong product mindset and ability to work closely with leadership on product and technical decisions.
• Ability to make decisions in ambiguous, fast-moving environments.
• Based in San Francisco or willing to work on-site in San Francisco.

Nice to have:

• Experience in AI infrastructure, data infrastructure, ML/data platforms, audio data, or research tooling.
• Experience scaling engineering teams and processes.
• Experience working directly with CTOs, founders, or executive leadership.
• Experience building internal platforms, developer tools, or high-scale data products.
• Startup experience at Seed, Series A, or high-growth stages.

Tech stack

• Next.js
• TypeScript
• PostgreSQL
• Full-stack web development
• Scalable data processing pipelines
• Data-intensive systems

Compensation and work format

• Salary: $250,000–300,000 gross per year
• Employment type: Full-time
• Work format: On-site
• Location: San Francisco, CA

Why join

This is a strong opportunity for an engineering leader who wants to build core products, shape technical direction, and grow an engineering team inside a fast-growing AI infrastructure company.

You will work closely with the CTO, own important technical and product decisions, and help build the platform behind advanced audio data research.

• Project Description:

  We are developing a platform that receives securities and price data from multiple providers, enriches and validates it, and distributes the consolidated data to internal bank systems. Our team manages various web and desktop applications, web services, and Linux environments that enable visualization of securities and execution of related workflows.
  
  Our components are built using Java 8-11, JavaScript/TypeScript, Oracle, and Spring 4-5, including Spring Boot.

• Responsibilities:

  - Develop back-end systems using Java with well-tested code.
  - Support the development environment, primarily through automation using Jenkins CI and Bash.
  - Evaluate and implement new development tools, libraries, and methodologies to enhance quality.
  - Conduct peer code reviews for changes in the project codebase.
  - Collaborate effectively with a global team across multiple time zones, demonstrating strong verbal and written communication skills.
  - Provide constructive suggestions and alternative solutions to team members to identify the most efficient and optimized approaches.

• Mandatory Skills Description:

  The role requires extensive expertise in Java SE and Java EE with over a decade of professional experience, emphasizing strong proficiency in the Spring framework, including Boot, IoC, MVC, AOP, Security, Data, JDBC, and testing components. The candidate must be skilled in SQL and relational databases, specifically Oracle, and have a solid understanding of Servlets, servlet containers such as Tomcat, and application servers like Weblogic. Familiarity with CI/CD processes and tools, notably TeamCity and Jenkins, is also essential.
  
  Hard skills include:
  - Advanced Java SE and Java EE development
  - Comprehensive Spring framework application
  - SQL query writing and database management using Oracle
  - Knowledge of Servlets, Tomcat, and Weblogic server environments
  - Experience with CI/CD pipelines using TeamCity and Jenkins
  - Practical Linux system navigation, file and permission management, user and group administration, process and service handling, security keys and certificates, and basic Bash scripting
  
  Soft skills focus on:
  - Analytical problem-solving to identify and implement effective, maintainable solutions
  - Collaborative discussion and consensus-building within the team to select optimal approaches

• Nice-to-Have Skills Description:

  - Proficiency in Angular or similar frameworks (React, Vue), including Angular Material and RxJs, demonstrating capability in modern front-end development.
  - Ability to design and implement visually appealing and functional HTML/CSS layouts.
  - Strong expertise in Oracle database management and operations.
  - Familiarity with ELK stack for logging, monitoring, and data analysis.
  - Experience working with Spring Cloud modules and developing microservice architectures.

• Languages:
  • English: B2 Upper Intermediate

We build a wireless handheld ultrasound (POCUS) device that connects to iOS/Android via a mobile app. This is a real hardware + software product in the medical domain, where reliability, performance and clean engineering practices matter.

What you’ll do

• Design, implement and test embedded C++ (C++17+) software for a handheld device
• Deliver new features and continuously improve architecture and code quality
• Write unit tests for low-level/embedded parts (tests are treated as product code)
• Participate in design discussions and code reviews in a supportive team culture
• Collaborate with cross-functional stakeholders (Product, UX/usability, clinical experts) to turn requirements into implementable solutions
• Optimize performance and resource usage (CPU/memory/power, depending on the area)
   

What we’re looking for

• 3–5+ years of commercial experience with modern C++ in an embedded context
• Degree in Computer Science, Engineering, Mathematics, or a related STEM field
• Strong fundamentals in software design and building maintainable systems
• Practical experience with unit testing, including low-level code
• Comfortable working in an existing codebase and improving it over time
• English: Intermediate+
   

Nice to have (not required)

• Yocto / Embedded Linux, kernel driver development
• Microcontrollers, FreeRTOS / bare-metal
• Performance work: SIMD/NEON (OpenCL/CUDA depending on domain)
• Python/Matlab for prototyping; signal/image processing; basic electronics
• Docker/Podman, CI/CD experience
   

Team & process

• International teams: about 30 engineers (Norway) + 30–40 contractors. 
• Agile/Scrum with typical 3-week sprints
• Tooling: GitLab CI/CD, Jira/Confluence, HP ALM
   

Work setup

• Remote during wartime → office/hybrid later (Kyiv or Kharkiv)
• MacBook 

I run a growing portfolio of faceless YouTube channels — history, mystery, and curiosity documentaries. Scripts, voiceover, and illustrated art are produced in-house. I need a reliable editor to turn those raw assets into finished, retention-optimized long-form videos and grow with the channels over time.

What you'll do

• Edit 8–10 minute long-form videos from a provided voiceover, a set of illustrated images, and a beat-by-beat edit map.
• Cut for retention: tight pacing, zero dead air, momentum from the first 8 seconds.
• Add subtle motion (pan / zoom / parallax), transitions, sound design, music, and captions.
• Work to a locked visual style guide and keep every video on-brand and consistent.
• Hold a steady cadence (starting ~2 videos/week) with clean, on-time delivery.

You're a fit if you

• Have 2+ years editing video — ideally faceless / documentary-style YouTube (not talking-head).
• Know After Effects + Premiere (or DaVinci Resolve) well; comfortable with motion graphics.
• Can integrate illustrated / AI images and make static art feel alive.
• Communicate clearly, take direction from a style guide, and turn work around fast.
• Bonus: sound design, thumbnail support, or experience on a channel that scaled.

How it works

• Start with ONE short paid test task (~60-second clip from real assets) — paid on delivery regardless of outcome.
• Strong performers move to ongoing work at $500–$700/month, part-time, fully remote, with per-view bonuses and a path to lead editor as the channels grow.

To apply, send:

1. 1–2 links to faceless / long-form videos you personally edited.
2. Your typical turnaround for a 8-10 minute video.
3. The tools you edit in.

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