Jobs at Djinni

🚀 We’re Hiring: Backend .NET Developer (Middle Level)

We are pleased to represent a leading European provider of secure IoT connectivity and end-to-end solutions, currently seeking a skilled Backend .NET Developer to join their dynamic team in Lviv.

🏢 About the Company

Our client empowers organizations to optimize operations, enhance business value, and safeguard critical functions through innovative IoT technology.
Their secure IoT solutions are trusted across diverse sectors — including smart buildings, alarms, transportation and logistics, personal safety, healthcare, construction, public services, education, rescue operations, and energy infrastructure.

💻 Role Overview

This is a full-time hybrid role based in Lviv, with flexibility to work remotely on occasion.
As a Backend .NET Developer, you must:

• · Have at least 3 years of commercial experience
• · Develop and maintain backend services using .NET 8+ / C#.
• · Work with SQL database MSSQL: queries, optimization, migrations.
• · Integrate with third-party APIs and external services.
• · Work with Azure Cloud 
• · Participate in architecture design and write unit tests.
• · Collaborate with frontend, QA.

• · Level of English: Intermediate Strong or higher.

   

  Tech stack

• · C#, .NET 8
• · Entity Framework Core, LINQ, AutoMapper
• · Azure Functions / App Services / Azure SQL
• · REST API, JSON, Swagger
• · Git, Azure DevOps
• · Basic JavaScript

• · Azure Portal

   

If you are passionate about cutting-edge technologies and want to contribute to impactful IoT solutions, we’d love to hear from you!

Every bold idea deserves to be heard - and you can make it happen with us. At TechMagic, we’re looking for a Digital Marketer who’s passionate about technology and ready to turn strategy into real growth.

Since 2014, we’ve partnered with 200+ global clients, building impactful solutions in Healthcare, Cloud, and Cybersecurity - from telemedicine platforms to AI-driven diagnostics. Now, we need someone who can fuel our sales pipeline with high-quality leads and help scale both TechMagic and its subsidiaries.

If you’re driven by digital transformation and want your work to directly influence business growth—this is your moment.

This role is ideal for you if you:

    •    Understand the specifics of outsourcing marketing: long deal cycles, building trust through expertise rather than advertising

    •    Don’t wait for ideal conditions - you test hypotheses, learn and move forward

    •    See AI as a superpower for productivity, rather than a threat or a replacement for you.

REQUIREMENTS

Skills:

    •    1 - 2 years of practical marketing experience (B2B, preferably in IT or SaaS/outsourcing)

    •    An understanding of the principles of demand generation and lead nurturing

    •    Experience working with at least one channel: LinkedIn Ads, Google Ads, email marketing, SEO

    •    Ability to write copy for a technical audience — CTOs, VPs of Engineering, healthcare product owners

Tools and technologies:

    •    AI-first approach to work: ChatGPT / Claude / Perplexity for content, research, automation

    •    HubSpot, Apollo, Instantly or similar — experience or the ability to learn quickly

    •    Basic knowledge of analytics: Google Analytics, LinkedIn Insights

Language:

    •    English B2 and above — most materials, communications and the target audience are English-speaking

RESPONSIBILITIES

Your main objective is to build and maintain a high-quality pipeline of potential clients (MQL → SQL). 

Specifically:

    •    Developing and launching outbound and inbound campaigns (email, LinkedIn, content)

    •    Generating leads through organic content, paid channels and partnerships

    •    Writing content for a B2B audience in the healthtech niche: landing pages, case studies, white papers, email sequences

    •    Collaborating with the sales team to align marketing with the actual deal cycle

    •    Analysing funnel metrics and continuously optimising conversions

    •    Active use of AI tools to scale activities without increasing resources

INTERVIEW STAGES

1. Pre-screening with the Recruiter

2. Interview with the Growth Marketing Manager

3. Test task

4. Final interview with Head of Marketing 

OUR BENEFITS

• Opportunity to work in a highly-skilled marketing team
• Work from anywhere (fully remotely or in our office) 
• Paid vacations and sick-leaves, additional days-off, relocation bonus
• Wellness: Medical insurance/sports compensation/ health check-up+flu vaccination at your choice
• Education: regular tech-talks, educational courses, paid certifications, English classes
• Fun: own football team, budget for team lunches, branded gifts

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for an Access Manager to join our team!

 Requirements:

- Basic understanding of access control principles (RBAC, least privilege).
- Understanding of user access lifecycle (onboarding, role changes, offboarding).
- Ability to process and review access requests under supervision.
- Attention to detail and accuracy in documentation.
- Basic knowledge of IAM tools or readiness to learn them quickly.
- Understanding of security and compliance basics.
- Good communication skills and teamwork.governance, audit processes, and least privilege principles.

Responsibilities:
- Management of employee accounts in corporate systems: creation, management of access levels, blocking;
- Processing requests for end users related to accounts;
- Creation of roles and granting access;
- Keeping track of issued access.

Our benefits to you:
☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

🗣Free internal English courses

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location

Join the Data Engineering team to contribute to the ongoing maintenance and improvement of an internal assistant that uses hosted APIs and internal knowledge sources, with a focus on reliability, retrieval quality, and operational excellence.

Responsibilities:

• Maintain and enhance ingestion/enrichment pipelines for internal content (parsing/extraction, normalization, metadata enrichment, deduplication, and quality monitoring)
• Implement and maintain access-aware retrieval by propagating/enforcing document permissions through indexing and query-time filters, including audit logs and validation tests
• Improve source attribution so responses reliably point to the correct documents and sections in a consistent format.
• Extend and harden tool/workflow execution and automations (scheduled/trigger-based), including retries, timeouts, idempotency, concurrency controls, and run history
• Operate the platform in production: observability (logs/metrics/tracing), alerting, incident support, performance tuning, and cost controls, plus runbooks and handover documentation

Mandatory Skills:

8+ years of hands-on experience in Data Science and 2+ years in Machine Learning, with a proven track record, demonstrated through a robust portfolio of projects.
Strong programming skills in languages such as Python and familiarity building ETL pipelines.
Expertise in SQL and experience with both relational (preferably Postgres) and NoSQL databases
Solid experience with OpenSearch
Familiarity with AWS cloud platform and its services.
Experience with version control systems (e.g., Git) and CI/CD pipelines.
Ability to build scalable infrastructure to embed and search very large number of documents.
Ability to move fast in an environment where things are sometimes loosely defined and may have competing priorities or deadlines.
Expertise in ML
Strong English skills (B2 and higher)
Strong verbal and written communication skills.
Ability to work independently and collaborate in a group.

Nice-to-Have Skills:

Agile certification
Oracle/Microsoft attestations and certifications
Domain knowledge - Trading and Capital Markets

About the Company

Established in 2004, ALLSTARSIT was founded with a clear vision: to enhance the landscape of global IT employment by bridging the gap between companies and skilled professionals. The core belief was that assembling a team shouldn't be hindered by geographical constraints. Fast forward to the present day, ALLSTARSIT stands as an international outstaffing service provider committed to change the way businesses recruit, compensate, and oversee top talent worldwide.

With operational hubs scattered across Europe, Asia, and LATAM, and its headquarters situated in San Francisco, US, the company boasts a workforce of over 1,000 adept professionals. Spanning across more than 20 countries, ALLSTARSIT offers a diverse range of skilled employees across various verticals, including AI, cybersecurity, healthcare, fintech, telecom, media, and so on.

About the Project

Our client is a pioneer in bringing together enterprise networking and security into a single, centralized global cloud service. It is led by an industry veteran with a strong background in founding and investing in leading cybersecurity companies. Its innovative technology helped inspire an entirely new product category that was later defined by Gartner as “SASE,” a market projected to reach $28.5 billion by 2028.

Required skills:

• Strong will and aspiration in making the first step in the Networking and Information Systems Security industry.
• Strong computer skills with an emphasis on Networking, TCP/IP, Firewalls, and proxy servers.
• CCNA Certification or equivalent knowledge level.
• Familiarity with VPNs, IPSEC, security protocols, and standards.
• Great troubleshooting abilities and passion to dive into complicated technical problems in real production environments.
• Excellent oral and written communication skills with a passion for working with customers.
• Fluent English, both written and spoken - a must
• Ability to adapt and work efficiently in a rapidly changing, dynamic environment with a willingness to manage multiple simultaneous tasks.
• Ability to work effectively and thrive in a fast-paced environment.
• Ability to work with a globally dispersed, cross-cultural team
• Team player
• Commitment is required for a minimum of 5 shifts a week as well during weekends.
• Experience working with Cloud, SaaS technology provider- Advantage.
• Previous experience as a Support Engineer (Tier 1– security companies) will be a big advantage.

Scope of work:

• Provide technical support for Cato Networks customers around the world.
• Own and manage customer issues and see problems throughout resolution.
• Research, diagnose, troubleshoot, and identify solutions to resolve customer issues, keeping a positive and “can-do” attitude.
• Be a focal point for the customer’s needs and become a trusted advisor with customers by deeply understanding their business and aligning their needs with our solutions.
• Act as a customer advocate internally while effectively collaborating with internal teams, including product management, engineering, sales, and finance.
• Track and monitor customer status and identify both areas of concern and growth opportunities.
• Be a part of building and expanding the company’s Global Support Services.

Data Science UA is a service company with deep expertise in AI and Data Science. Our story started in 2016 with the first Data Science UA Conference in Kyiv, and since then, we’ve built one of the largest AI communities in Europe.

About the client:
Our client is a global Solution Integrator specializing in enterprise-grade infrastructure, platform engineering, and cloud-native architectures. They partner with the world's leading technology vendors to help organizations design and implement transformative solutions that drive innovation, efficiency, and growth. 
 

Office location: Vilnius (hybrid format, office visit 1-2 times a week)

About the role: 
We are looking for a Full Stack Engineer to join the CTO Office and take ownership of our client’s product development lifecycle. You'll work hand-in-hand with the CTO Office team, taking initiatives that have been validated as POCs and leading them into production-grade, scalable solutions.

Responsibilities:
- Take validated POCs from the CTO Office and architect, build, and ship them as production-ready applications
- Design and develop full-stack solutions — modern frontends paired with robust, scalable backends
- Build and deploy within the AWS ecosystem (Lambda, ECS/EKS, DynamoDB, S3, RDS, API Gateway, CDK/CloudFormation, and more)
- Own the CI/CD pipeline — design, build, and maintain automated workflows using GitHub Actions
- Design and build internal agentic AI solutions using LangChain and LangGraph — from multi-step agent orchestration to RAG pipelines and tool-augmented workflows
- Leverage Agentic IDE tools (Cursor, Claude Code, and similar) as a core part of your development workflow, applying best practices around skills, MCPs, agents, and prompt engineering to accelerate delivery
- Collaborate closely with the CTO Office, product stakeholders, sales, and pre-sales teams to translate business needs into elegant technical solutions 
- Make pragmatic technology decisions that balance speed, quality, and maintainability

Requirements:
Must-Have:
- 5+ years of professional full-stack development experience
- Frontend: Strong proficiency with Vue.js or React (with modern tooling such as Nuxt/Next.js, TypeScript, Vite, Tailwind CSS)
- A builder's mindset — you thrive on taking something from prototype to production
- Understanding of system design principles — you can architect scalable, reliable distributed systems and make sound trade-offs
- Grasp of data structures and design patterns — to work alongside your Agentic IDE you write efficient, well-structured code
- Backend: Solid experience with Python and modern frameworks — primarily FastAPI, or Django/Flask
- Hands-on experience with the AWS cloud ecosystem — you've built and deployed real workloads on AWS
- Hands-on experience building agentic AI systems with LangChain and LangGraph — including multi-agent orchestration, tool use, and RAG patterns
- Proven experience designing and maintaining CI/CD pipelines with GitHub Actions including automated PR based Code Reviews.
- Working knowledge of Agentic IDEs and AI-assisted development (Cursor, Claude Code, Windsurf, or similar) — including familiarity with skills, MCP servers, agents, and AI-driven development best practices
- Strong understanding of RESTful API design, relational and NoSQL databases, and cloud-native architecture patterns

Nice-to-Have:
- Experience with Amazon Bedrock and/or Azure AI Foundry for building and deploying AI/ML solutions on managed cloud platforms
- Experience with Infrastructure as Code (AWS CDK, Terraform, CloudFormation)
- Experience in security infrastructure (IDP, authentication protocols - S) and writing secured applications 
- Security & Identity - understanding of application security, including SSL/TLS certificates, secret management, and identity providers (IDP). Experience implementing authentication and authorization protocols such as SAML, OAuth2, and JWT.
- Foundational SRE knowledge, including monitoring, logging, and observability (e.g., CloudWatch, Prometheus, ELK) to ensure production stability and performance.
- Familiarity with FinOps concepts, cloud cost management, or multi-cloud environments
- Experience building data-driven tools — predictive models, analytics dashboards, or recommendation engines
- Exposure to Azure services alongside AWS
- Experience with containerization and orchestration (Docker, Kubernetes)
- Background in B2B SaaS or enterprise software development

About the Role

We are looking for a Cloud Platform Engineer with strong expertise in Azure Cloud and Kubernetes to join a growing engineering team. In this role, you will be responsible for designing, implementing, and supporting cloud-native platforms, workflow orchestration solutions, and event-driven architectures. You will work closely with international stakeholders to improve scalability, reliability, and automation across modern cloud environments.

Responsibilities

• Design, implement, and support cloud-native and containerized solutions
• Manage, optimize, and troubleshoot Kubernetes environments (AKS preferred)
• Develop and maintain workflow orchestration platforms and automation pipelines
• Build and support messaging and event-driven integration solutions
• Improve CI/CD processes, GitOps practices, and infrastructure automation
• Implement Infrastructure as Code (IaC) and cloud governance best practices
• Monitor platform health, performance, and reliability
• Collaborate with architects, developers, and business stakeholders in an international environment
• Contribute to platform improvements, operational excellence, and technical standards

Requirements

Must Have

• Strong hands-on experience with Kubernetes (AKS preferred)
• Solid experience with Microsoft Azure
• Experience with workflow orchestration tools such as:
  • Argo Workflows
  • Temporal
  • Apache Airflow
• Experience with messaging and integration technologies:
  • Kafka
  • Azure Service Bus
  • Azure Event Hub
• Strong Python skills for automation and scripting
• Experience with CI/CD pipelines and DevOps practices
• Knowledge of GitOps principles
• Experience with Infrastructure as Code (Terraform, Bicep, or similar)
• Experience with monitoring and observability solutions
• Understanding of cloud-native architecture and distributed systems
• Good communication skills and consultative mindset
• Upper-Intermediate English or higher

Nice to Have

• Experience with ArgoCD
• Experience with Helm
• Azure certifications
• Experience with microservices architecture
• Experience working in enterprise cloud environments
• Knowledge of security best practices in Kubernetes and Azure

What We Offer

• Opportunity to work on modern cloud-native platforms
• International and collaborative environment
• Challenging technical projects using modern technologies
• Long-term cooperation
• Remote work flexibility
• Professional growth and development opportunities

Technology Stack

Azure, AKS, Kubernetes, Python, Kafka, Azure Service Bus, Azure Event Hub, Argo Workflows, Temporal, Airflow, GitOps, CI/CD, Terraform, IaC, Monitoring & Observability

Meet the YozmaTech

YozmaTech isn’t just another tech company – we’re a global team of go-getters, innovators, and A-players helping startups and product companies scale smarter and faster.
We build dedicated development teams across 10+ countries, creating strong, long-term partnerships based on trust, transparency, and real impact.
Here, every idea counts. We value people who are proactive, open-minded, and ready to grow. If you’re passionate about building meaningful products and want to join a team that feels like family – you’ll feel right at home with us.

Our client is looking for a Senior Full Stack Engineer with strong expertise across both frontend and backend, a passion for building scalable, high-quality products, and proven ability to handle end-to-end feature development.

In this role, you’ll play a key part in advancing our web architecture, improving system performance, and enhancing the overall development standards of our platform. You’ll work on complex real-time products, helping shape fast, reliable, and user-friendly experiences.

If you enjoy solving technical challenges, working with modern technologies, and creating clean, efficient solutions — we’d love to connect.

This role offers the opportunity to make a direct impact on product quality, technical decisions, and overall platform growth within a fast-moving and collaborative environment.

Key Requirements:
🔹 5+ years of software engineering experience, with strong frontend expertise in modern JavaScript frameworks (React, Angular, Vue), TypeScript, and modern build tools (Vite, Next.js, SWC);
🔹 Proven experience improving frontend architecture and scaling web applications;
🔹 Strong understanding of TypeScript, build tools (Webpack, Vite), and browser APIs;
🔹 Solid backend fundamentals 5+ years — API design, data flow management, and building scalable systems with Python as a must-have and Node.js considered a strong plus.
🔹 Hands-on experience with AI tools such as Cursor, Claude, and ChatGPT
🔹 Product-oriented mindset with strong attention to UX, quality, and maintainability;
🔹 Strong communication skills and the ability to work effectively in cross-functional teams;
🔹 English – Upper-Intermediate or higher.

What you will do:
🔹 Drive frontend improvements by introducing better development practices, tools, and modern technologies;
🔹 Design and develop scalable, high-performance web applications using React and modern frontend frameworks;
🔹 Take ownership of features from planning to production, including technical design, implementation, and optimization;
🔹 Work closely with Product, Design, and engineering teams to deliver smooth and intuitive user experiences;
🔹 Support backend development in Python to ensure strong integration across the full product stack;
🔹 Improve development processes, code quality, testing, and overall engineering efficiency;
🔹 Focus on performance, reliability, and maintainability across the platform;

Interview stages:
🔹 HR Interview
🔹 Intro Call
🔹 Technical Interview
🔹 Final Interview
🔹 Reference Check
🔹 Offer

Why Join Us?

At YozmaTech, we’re self-starters who grow together. Every day, we tackle real challenges for real products – and have fun doing it. We work globally, think entrepreneurially, and support each other like family. We invest in your growth and care about your voice. With us, you’ll always know what you’re working on and why it matters.
From day one, you’ll get:
🔹 Direct access to clients and meaningful products;
🔹 Flexibility to work remotely or from our offices;
🔹 A-team colleagues and a zero-bureaucracy culture;
🔹 Opportunities to grow, lead, and make your mark.

After you apply

We’ll keep it respectful, clear, and personal from start to offer.
You’ll always know what project you’re joining – and how you can grow with us.

Everyone’s welcome

Diversity makes us better. We create a space where you can thrive as you are.

Ready to build something meaningful?

Let’s talk. Your next big adventure might just start here.

We're looking for a Senior with 8+ years of experience with a strong knowledge of both Ruby on Rails and Typescript.

Senior Ruby developer ASAP
(Please, send candidates only with the relevant skills specified in the white label CVs!)

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

Requirements:
A Full-Stack Craftsman: You are an expert in Ruby on Rails and TypeScript, capable of building everything from complex dashboards and billing UIs to sleek documentation platforms.

The "DevEx" Champion: You have a natural empathy for other developers. You’ll develop deep knowledge of our platform (Pub/Sub, Chat, LiveSync) and use the product yourself to gain a first-hand understanding of the developer experience.

Comfortable with Ambiguity: You thrive in high-level vagueness. You can take a feature from a loose concept to a shipped product with minimal hand-holding, identifying problems and proposing solutions independently rather than waiting for a roadmap.

Accountable & Reliable: You take pride in high-quality, well-tested code. You meet your delivery commitments, provide realistic estimates based on technical complexity, and communicate proactively if a timeline is ever at risk.

An Owner: You monitor what you build in production and take personal ownership of quality issues. You see a feature through its entire lifecycle, from the first line of code to the final metric.

Fox Carriers is a stable logistics company with 10 years of experience in the US market. Our core values are honesty and long-term partnerships.

We are actively growing and scaling, and we are looking for energetic people who want to grow with us — both professionally and as part of a strong team.

Responsibilities:
- Manual testing of web and mobile applications (iOS/Android)
- Writing test cases, checklists, and bug reports
- Regression and functional testing
- Participation in grooming and sprint planning
- Working with Jira / Confluence for documentation

Requirements (must have):
- Understanding of testing fundamentals: types, levels, test design techniques (ECP, BVA, pairwise)
- Ability to read and analyze requirements (specifications, user stories)
- Experience with browser DevTools
- Basic knowledge of HTTP/REST API (Postman or similar tools)
- Understanding of mobile platform basics, ability to work with emulators
- Proficiency in writing clear and detailed bug reports

Nice to have:
- Basic SQL knowledge for database verification
- Familiarity with Git at a basic level
- Any automation experience (Selenium, Appium, Playwright) — even academic
- Experience working in an Agile/Scrum team

What we offer:

• Paid vacation and sick leave
• Sports compensation
• Friendly and supportive team
• Fully remote work format
• Working hours: Monday-Friday, 9:00 AM — 6:00 PM
   

Interview Process:

1. HR Interview & Live Practical Task
2. Technical Interview 
3. Interview with the Hiring Manager (Project Discussion)
4. Offer

Our Client is a cybersecurity software company that specializes in network and cloud security policy management and automation. It's platform helps large enterprises visualize, automate, and enforce consistent security policies across complex hybrid environments — including firewalls, cloud services, SASE, SD-WAN, and microsegmentation — while ensuring compliance and reducing risk.

Position Description:

This role combines excellent technical skills, driving multidisciplinary Data Science initiatives within complex, security policy management systems. The role drives the development of innovative, production-grade AI capabilities - including security AI agents and advanced machine learning models built on complex security data. Original thinking, deep technical rigor, intellectual agility, and exceptional problem-solving are essential.

Key Responsibilities

• Develop Data Science initiatives from problem definition through validation, production deployment, and monitoring of AI systems
• Develop security-focused AI agents and reasoning systems
• Develop advanced ML capabilities, including predictive modeling, anomaly detection, and classification
• Adapt and fine-tune LLM technologies for domain-specific security use cases

Position Requirements:

• M.Sc. in Data Science, Computer Science, Statistics, Mathematics, or a related quantitative discipline
• At least 3 years of hands-on Data Science experience, delivering end-to-end solutions into production environments
• Deep understanding of machine learning theory and practical model behavior
• Expertise in Python and the modern Data Science ecosystem (NumPy, Pandas, Scikit-learn, PyTorch / TensorFlow, etc.)
• Solid understanding of LLM architectures and fine-tuning methodologies
• Excellent interpersonal skills and proven ability to work within multidisciplinary product teams
• Strong analytical rigor and structured problem-solving capability

We are looking for a strong Senior QA Engineer with solid experience in crypto processing and blockchain-based payment systems. Experience with major networks such as Solana, Tron, Litecoin, and Bitcoin is very important. The ideal candidate should have hands-on experience testing complex web applications, crypto transaction flows, wallet operations, deposits, withdrawals, confirmations, edge cases, API integrations, and business-critical financial systems. Strong knowledge of OpenAPI testing, webhook validation, API requests/responses, error handling, data consistency, and integration testing is required. The role involves ensuring the quality, reliability, and security of crypto processing workflows across multiple blockchain networks, including testing transaction statuses, reconciliation logic, reporting, analytics, and multi-tenant role-based access scenarios.

We are looking for an experienced Head of Media Buying to join our team. In this role, you will lead and scale performance marketing operations across Tier-1 European markets, driving user acquisition, profitability, and sustainable growth. If you are passionate about performance marketing, data-driven decision-making, and building high-performing teams, we would love to hear from you!

HOW YOU WILL MAKE AN IMPACT

• You will develop and execute media buying strategies across Tier-1 European markets;
• You will manage and optimize multi-channel paid acquisition campaigns across Meta Ads, Google Ads, TikTok Ads, Programmatic/DSP, Push & In-App traffic, Influencer partnerships, ASA, and UAC;
• You will own media planning, budget allocation, and performance forecasting;
• You will manage monthly advertising budgets ranging from €300k to €1M+ while ensuring profitability and sustainable growth;
• You will monitor and improve key performance metrics such as CAC, CPA, CPI, CPL, ROAS, ROI, ROMI, LTV, Payback Period, and Contribution Margin;
• You will lead and mentor cross-functional performance teams, including Media Buyers, Creative Strategists, Designers, Analysts, and Tracking Specialists;
• You will collaborate closely with product, CRM, analytics, and creative teams to maximize acquisition and retention performance;
• You will build scalable acquisition processes, operational frameworks, and reporting structures;
• You will ensure accurate attribution, tracking, and data collection across all acquisition channels;
• You will continuously test, analyze, and optimize campaigns to identify new growth opportunities.

WHAT WILL HELP YOU SUCCEED IN THE ROLE

• 5+ years of experience in Performance Marketing or Media Buying;
• 2+ years of experience in a leadership position such as Head of Media Buying, Performance Lead, or Acquisition Lead;
• Proven experience working with Tier-1 European markets;
• Hands-on experience managing advertising budgets of €300k–€1M+ per month;
• Strong track record of scaling profitable acquisition campaigns;
• Experience in highly competitive industries such as iGaming and Sports Betting;
• Deep understanding of acquisition economics, including CAC, CPA, CPI, CPL, ROAS, ROI, ROMI, LTV, Payback Period, Contribution Margin, Revenue Attribution, Incrementality, Cohort Analysis, Funnel Optimization, and Retention Impact;
• Strong analytical mindset with the ability to make data-driven decisions;
• Excellent leadership, communication, and stakeholder management skills;
• Upper-Intermediate English level or higher.

REQUIRED SKILLS

• AppsFlyer, Adjust, Kochava, or Singular;
• Google Analytics 4 (GA4);
• Google Tag Manager (GTM);
• Meta Conversion API (CAPI);
• Server-side tracking;
• Postback integrations;
• Attribution and analytics systems.

WILL BE A PLUS

• Experience launching and scaling acquisition strategies for mobile-first products;
• Experience working with influencer and performance partnership channels;
• Strong understanding of marketing automation and CRM-driven acquisition initiatives;
• Experience building and scaling international performance teams;
• Knowledge of advanced experimentation frameworks and incrementality testing.

HOW WE WILL KEEP YOU SMILING

• 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.
• Employee referral bonus and 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.
• Co-working space reimbursement to save your nerves from always working from home :)

Join the Data Engineering team to contribute to the ongoing maintenance and improvement of an internal assistant that uses hosted APIs and internal knowledge sources, with a focus on reliability, retrieval quality, and operational excellence.

• Responsibilities:

  • Maintain and enhance ingestion/enrichment pipelines for internal content (parsing/extraction, normalization, metadata enrichment, deduplication, and quality monitoring)
  • Implement and maintain access-aware retrieval by propagating/enforcing document permissions through indexing and query-time filters, including audit logs and validation tests
  • Improve source attribution so responses reliably point to the correct documents and sections in a consistent format.
  • Extend and harden tool/workflow execution and automations (scheduled/trigger-based), including retries, timeouts, idempotency, concurrency controls, and run history
  • Operate the platform in production: observability (logs/metrics/tracing), alerting, incident support, performance tuning, and cost controls, plus runbooks and handover documentation

• Mandatory Skills Description:

  8+ years of hands-on experience in Data Science and 2+ years in Machine Learning, with a proven track record, demonstrated through a robust portfolio of projects.
  Strong programming skills in languages such as Python and familiarity building ETL pipelines.
  Expertise in SQL and experience with both relational (preferably Postgres) and NoSQL databases
  Solid experience with OpenSearch
  Familiarity with AWS cloud platform and its services.
  Experience with version control systems (e.g., Git) and CI/CD pipelines.
  Ability to build scalable infrastructure to embed and search very large number of documents.
  Ability to move fast in an environment where things are sometimes loosely defined and may have competing priorities or deadlines.
  Expertise in ML
  Strong English skills (B2 and higher)
  Strong verbal and written communication skills.
  Ability to work independently and collaborate in a group.

• Nice-to-Have Skills Description:

  Agile certification
  Oracle/Microsoft attestations and certifications
  Domain knowledge - Trading and Capital Markets

The DataOS team at AppsFlyer is building and operating a reliable, high-scale data platform that powers analytics and product capabilities across the company.
We process more than 150 billion events per day and manage petabyte-scale historical data. Our team owns much more than a traditional “data lake” — including schema management, ETL pipelines, and interfaces to and from storage.

If you’re excited by scale, ownership, and building production-grade data systems, we’d love to meet you.

Tech stack highlights

Key technologies include:

• Processing and streaming: Spark, Kafka
• Data lake and formats: S3, Parquet, Delta Lake, Iceberg, Hadoop, Hive
• Cloud and compute: AWS, EMR/EMR Serverless, Athena
• Analytics and data platforms: BigQuery, BigLake, Aerospike, AWS Glue, Databricks Delta Engine
• Languages: Scala, Python (team focus), plus a broader polyglot engineering environment across AppsFlyer

What you’ll do:

• Design, build, and evolve large-scale data pipelines from raw ingestion to production-ready datasets.
• Develop and maintain Spark/Scala-based data processing workflows for both batch and streaming use cases.
• Own data platform reliability, quality, and performance in production environments.
• Collaborate with engineers, product owners, and stakeholders to define and deliver robust data solutions.
• Help shape engineering standards and operational practices as the DataOS team grows.

What You Bring:

• 3+ years of software engineering experience, with strong hands-on Scala and/or Java development.
• Strong Java core fundamentals.
• Proven experience with Spark and Kafka in production environments.
• Experience with the Hadoop ecosystem and distributed data processing platforms (AWS, GCP, Azure, CDP, MapR, or similar).
• Hands-on AWS experience, especially with S3 and EMR/EMR Serverless (Athena is a strong advantage).
• Experience building and operating cloud-based, high-scale distributed systems.
• Strong analytical and interpersonal skills, with the ability to work effectively across engineering and business teams.
• Professional spoken and written English.

Bonus Points:

• Knowledge of Scala is a plus.
• Experience with AWS authentication/authorization and cloud security fundamentals.
• Experience with CI/CD pipelines and tooling.
• Experience with DevOps and infrastructure-as-code tools (e.g., Terraform).
• Experience in SaaS product companies.
• Referred by an AppsFlyer employee.

Benefits:

• Health Insurance
• Paid Unlimited Vacation Days + all national holidays + additional recharge days
• Meals Reimbursement
• Sport Reimbursement
• Breakfast in the office
• Mental health program
• Team building, happy hours, and other team activities
• Paid sick days
• Snacks, fruits & ice cold beer
• All new team members are provided with a brand-new Mac laptop with 2 monitors and a Starter package