Jobs at Djinni

We are looking for a Senior Business Analyst with strong experience in security-driven products to join our team. You will play a key role in shaping product requirements, working closely with stakeholders, and translating complex security and technical needs into clear, actionable specifications. The product is a platform focused on security, risk management, and data protection, so domain expertise is essential.

Requirements:

• 5+ years of experience as a Business Analyst in IT/product companies.
• Proven experience working on security-related products (cybersecurity, risk management, compliance, data protection, identity & access management, etc.).
• Strong understanding of software development lifecycle and product-driven environments.
• Experience gathering and formalizing complex requirements from multiple stakeholders.
• Ability to translate technical and security concepts into clear business requirements.
• Experience working with API integrations, data flows, and system interactions.
• Strong knowledge of UML, BPMN, user stories, use cases, and acceptance criteria.
• Experience working closely with engineering, product, and design teams.
• Understanding of security standards and frameworks (ISO 27001, SOC 2, GDPR, OWASP, etc.).
• Strong analytical thinking and problem-solving skills.
• Experience with tools like Jira, Confluence, Miro, or similar.
• Upper-Intermediate or higher level of English.

Responsibilities:

• Gather, analyze, and document business and functional requirements.
• Work closely with stakeholders to define product vision and priorities.
• Translate business needs into detailed specifications for development teams.
• Collaborate with engineering teams on system design and solution validation.
• Define and maintain user stories, acceptance criteria, and documentation.
• Analyze and model business processes, data flows, and system interactions.
• Ensure alignment between business goals and technical implementation.
• Participate in backlog grooming, sprint planning, and product discussions.
• Support QA team with clarifications and validation of implemented features.
• Continuously improve product documentation and processes.

We offer:

• Competitive salary.
• Remote work format.
• Work on a security-focused international product.
• Salary tied to the dollar exchange rate.
• Opportunity to influence product direction and key decisions.
• Work with experienced teams in a complex, high-impact domain.
• Professional growth in the cybersecurity field.

We're looking for a Recruiter who's ready to take full ownership of hiring and build the recruitment function from the ground up.
You'11 be the first and only recruiter in the company, working directly with founders and team leads to shape how we attract, evaluate, and hire talent. This role is perfect for someone who enjoys autonomy, moves fast, and wants to have a real impact on team growth.

Responsibilities:

• Own the full-cycle recruitment process from intake to offer and onboarding
• Partner with hiring managers to understand roles, priorities, and ideal candidate profiles
• Source and hire non-technical talent, with a strong focus on Business Development and Marketing roles
• Build and manage candidate pipelines using different sourcing channels
• Improve and structure hiring processes, making them efficient and scalable
• Ensure a smooth and positive candidate experience at every stage
• Track hiring progress and keep stakeholders aligned

Required skills:

• At least 1,5+ years of hands-on recruitment experience
• Proven experience hiring non-technical roles, especially in Business Development and Marketing
• Confidence in running hiring processes independently
• Strong sourcing and communication skills
• English level B1 or higher
• Ability to prioritize, stay organized, and work in a fast-paced environment
   

Nice to have:

• Experience working in startups or small teams
• Experience building or improving recruitment processes from scratch
• Understanding of the FinTech, crypto, or digital product space

We offer:

• Full ownership of the recruitment function with real impact on company growth
• Close collaboration with decision-makers and fast feedback loops
• Remote-first setup with flexibility and trust
• Opportunity to grow into a Lead/Head of Recruitment role as the team scales

• A straightforward, no-bureaucracy culture focused on results

   

If you like taking ownership and seeing your work go live fast, you’ll feel at home here!

Bitmedia Labs is an international product company founded in 2014. Today, we’re a team of 150+ specialists working globally, building products used by millions worldwide.

Our work spans two core areas:
• Game Development – browser-first games for global audiences, centered on reward-driven progression and long-term engagement.
• Digital Advertising – high-performance advertising and affiliate platforms across Web2 and Web3 markets.

We believe great products are built by people who take ownership – shaping direction, making decisions, and seeing their work turn into real impact. Now, we’re looking for a LiveOps Manager to join the team and help us move our products forward.

Responsibilities:
• Manage all seasonal activities and Liveops events in the game;
• Decide on pricing policy, plan promotional strategy, sales, and discounts, and calculate the balance for offers;
• Improving game economy and monetization using LiveOps activities;
• Collaborate with ASO managers on LiveOps events and with community managers to promote activities on social media to users;
• Manage creative and promo content from ideation to execution.
• Work with the Creative Team to plan and deliver designs;
• Cooperate with the Product Team on the product side for new features;
• Vital IAP metrics tracking, analysis, and reporting;
• Competitive analysis and R&Ds.

Requirements:
• At least 2 years of experience in game development - game design and/or product management, ideally at the crossroads of Liveops events and monetization;
• Deep knowledge of monetization and product metrics;
• Ability to prepare design documentation.

Hiring process:
• Intro call with a Recruiter - Interview with the Hiring team - Сollection of recommendations - Offer.

Why join Bitmedia Labs?
We care about what we build – and about the people who build it. Our teams work closely together, share responsibility for the product, and support each other in everyday challenges.
As part of the team, you’ll have:
• Professional growth through products operating at global scale;
• The opportunity to experiment, bring ideas to life, and influence product decisions;
• Collaboration with strong, experienced teammates who value quality and teamwork.
We also support you with:
• Flexible schedule and the option to work remotely or from our hubs in Kyiv, Warsaw, and Berlin;
• Competitive compensation, regular performance reviews, paid vacation, sick leave, and public holidays;
• Modern Apple equipment and thoughtful corporate gifts for holidays and personal milestones;
• Support for your growth: courses, workshops, and conferences.
Through our charity foundation Bit Spilka, led by volunteers from our team, we support the military, medics, and civilians across Ukraine – delivering over $500,000 in aid to date. Here your work also drives social impact, and you can also join our volunteer initiatives.
If this resonates with you – send your CV and join us.
Let’s foster the world together!

We are seeking a Senior Backend Engineer (Go) to drive the evolution of the authorization platform. In this role, you will own the design and implementation of critical backend components, working with existing microservices written in Go and Java to deliver new functionality, migrate legacy code, and optimize performance. You will collaborate closely with product managers, frontend engineers, QA, and R&D teams to translate customer requirements into production-ready, scalable solutions. Given the platform’s complexity, high release cadence, and cloud-native foundation, you are expected to onboard quickly, work autonomously, and leverage AI-assisted development tools to increase delivery speed and quality. Your work will directly impact platform scalability, security posture, and customer satisfaction.

About the Product

Our product is a modern authorization platform that centralizes policy management and enforces dynamic, real-time access control across applications, APIs, and data. It combines centralized policy definitions with decentralized enforcement points to deliver low-latency authorization at scale. The platform integrates with leading IAM providers such as SailPoint, Okta, and Azure AD, and supports PostgreSQL, Elasticsearch, and MongoDB as backend data stores. Serving 100+ enterprise customers across finance, healthcare, and other regulated industries, the system processes millions of authorization requests per day, solving the industry challenge of fragmented and static access control. Reliability, security, and performance are critical in this high-volume, data-intensive, multi-tenant environment.

Details

Location: Remote

Employment Type: Full-time

Cloud Environment: AWS & GCP

Language Requirements: English Fluent 

Project durationL: 6+ months with possible prolongation 

Key Responsibilities

Design and develop backend services and components using Go and Java

Extend and refactor existing microservices, including migration of legacy code

Collaborate with R&D, product, frontend, and QA teams to turn custom implementations into production-grade features

Write high-performance, maintainable, and reusable code following established design patterns

Build and operate a scalable multi-tenant cloud architecture on AWS and GCP

Define, monitor, and meet performance metrics and KPIs for backend services

Integrate and manage data storage solutions including PostgreSQL, Elasticsearch, and MongoDB

Deploy and operate containerized applications using Docker and Kubernetes in production

Use AI-assisted development tools (e.g. Copilot, Cursor) to accelerate development and code comprehension

Mentor team members and contribute to a monthly release cycle with strict quality and security checks

Requirements

Bachelor’s or Master’s degree in Computer Engineering or a related field

7+ years of hands-on experience in backend development with Go and/or Java

5+ years of experience building Java microservices using Spring Boot

5+ years of experience with Docker and Kubernetes in production environments

3+ years of experience with PostgreSQL and NoSQL databases (Elasticsearch, MongoDB)

Proven experience designing and operating multi-tenant architectures

Hands-on experience with AWS and GCP

Strong proficiency with Linux/Unix systems and command-line tools

Demonstrated ability to design and deliver high-performance, scalable backend systems

English level B2 or higher

Nice to Have

Experience with authorization and authentication systems

Strong understanding of cybersecurity principles and policy-based access control

Background in enterprise or regulated environments

Familiarity with AI-driven development tools (Copilot, Cursor)

We are looking for a Senior Scala Engineer to join a data-driven engineering team working on large-scale distributed data processing platforms. The role focuses on building, optimizing, and maintaining high-performance data pipelines using Scala, Apache Spark, and Databricks within a Microsoft Azure cloud environment.

You will work closely with data engineers, architects, and product teams to deliver reliable, scalable solutions that process massive volumes of data and support business-critical analytics and decision-making.

Details

Location: Remote 

Employment Type: Full-time

Start Date: ASAP

Language Requirements: English — Upper-Intermediate or higher

Key Responsibilities

Design, develop, and maintain scalable data processing solutions using Scala and Apache Spark

Build and optimize ETL / ELT pipelines on Databricks

Work with large datasets, ensuring performance, reliability, and fault tolerance

Deploy and operate data workloads in Azure (ADLS, Azure Data Factory, Azure SQL, etc.)

Collaborate with data architects on data modeling and pipeline design

Optimize Spark jobs for cost, performance, and scalability

Implement best practices for data quality, monitoring, and logging

Participate in code reviews, technical discussions, and architectural decisions

Troubleshoot and resolve production data issues

Requirements

Strong hands-on experience with Scala in production environments

Solid expertise with Apache Spark (batch and/or streaming)

Proven experience working with Databricks

Experience with Microsoft Azure data services

Strong understanding of distributed systems and data processing concepts

Experience with SQL and data warehousing concepts

Familiarity with CI/CD pipelines and version control (Git)

Ability to work independently and take ownership of complex components

Strong communication skills and ability to collaborate in cross-functional teams

Nice to Have

Experience with Spark Structured Streaming

Knowledge of Delta Lake

Experience with data governance and security in cloud environments

Background in analytics, fintech, AdTech, or large-scale enterprise data platforms

Exposure to Infrastructure-as-Code (Terraform, ARM, Bicep)

COMPANY
Arcyn is creating an AI-powered compliance checker for architectural design — an Autodesk Revit plugin that automatically checks designs against regulations. Architects get instant feedback on violations as they design in Revit, instead of waiting weeks for permit reviewers to tell them what’s wrong.

We’ve just closed the seed round and are building the core technical team. We’re now a team of 4 with a track record of building complex technical products. This is a chance to join at the ground floor, shape product architecture and solve genuinely hard AI problems.

KEY RESPONSIBILITIES

• Design and maintain modular, multi-step ML and LLM workflows for compliance automation, combining classical ML techniques with LLM-based components where appropriate
• Lead the data science and ML work end-to-end: problem framing, data exploration, experimentation, evaluation, and productionization
• Integrate multiple LLM providers (e.g., OpenAI, Anthropic, Perplexity) into a cohesive orchestration pipeline.
• Build cost-optimized batch processing and intelligent API request strategies.
• Translate complex regulations into structured, machine-executable logic.
• Develop and validate automatically generated code to ensure correctness, safety, and performance.
• Collaborate with domain experts to refine logic interpretation and edge case handling.
• Maintain high-quality, well-structured Python codebases with clear separation of concerns.

REQUIREMENTS
Must-have:

• 8+ years of professional experience in data science, ML engineering, or closely related roles
• Strong foundation in ML/DS fundamentals: feature engineering, model selection, evaluation methodology, error analysis, and handling messy real-world data
• Strong Python skills, including experience writing production-grade, modular code.
• Proven track record building multi-step LLM workflows (LangChain, LangGraph, or similar).
• Experience in structured code generation and validation.
• Strong debugging skills and comfort working with complex, evolving systems.

Nice-to-have:

• Experience with compliance automation, technical regulations, or domain-specific rule translation.
• Familiarity with Pydantic models or other type-safe data management frameworks.
• Background in developer tooling or systems requiring high reliability and reproducibility.
• Experience optimizing LLM API usage for both cost and speed.

WHAT WE OFFER

• Full-time remote role aligned with CEST
• B2B set-up via SP account
• Flexible work arrangements and competitive compensation
• Freedom to architect solutions using the best tools for the job
• Collaboration with a multidisciplinary, innovation-driven team
• Opportunity to shape a new AI product from the ground up at an early stage

We are the Product Security team, responsible for the security, reliability, and trust of Raiffeisen Bank’s digital ecosystem.
Our mission is to embed security at every stage of the software development lifecycle and continuously strengthen the resilience of our services.

We are looking for an AI Engineer (Security) — a specialist who combines strong software engineering experience, hands-on expertise with LLMs and AI tools, and a desire to apply these skills within the cybersecurity domain.

In this role, you will design AI-driven solutions to automate security team processes, assess the security of AI systems implemented across business and IT, and help colleagues integrate AI into their daily workflows.

Your future responsibilities:

In this role, you will be responsible for designing and implementing AI solutions for security teams. You will build LLM agents, RAG systems, AI pipelines, and integrations using modern tools.

At the same time, you will implement a Shift-Left AI Security approach — embedding AI security checks early in the development lifecycle by integrating them into CI/CD pipelines and SSDLC processes. This includes:

• Analyzing AI-specific threats
• Managing Shadow AI risks
• Helping Security team to build tools for conducting security reviews of AI products before they go into production
• Defining architectural standards for AI security tooling across the organization
• Mentoring engineering teams on secure AI integration patterns and best practices
• Leading technical decision-making for AI security infrastructure choices

If you are passionate about combining artificial intelligence and cybersecurity in a complex, technology-driven financial environment — this role is for you.

Your skills and experience:

• 5+ years of software development experience
• Strong proficiency in Python and other programming languages for building automation, scripts, and integrations
• Hands-on experience with LLMs: prompt engineering, building chains/agents, working with model APIs (e.g., OpenAI, Anthropic)
• Experience with LLM frameworks
• Practical use of AI assistants in development (e.g., GitHub Copilot, Claude Code, Cursor or similar)
• Understanding of RAG architectures: vector databases, embedding models, chunking strategies
• Knowledge of OWASP Top 10 for LLM Applications
• Ability to rapidly prototype — from idea to working PoC in days, not months
• Experience influencing technical direction across multiple teams or projects
• Track record of knowledge transfer — documentation, workshops, or internal enablement

Will be a plus:

• Experience with model fine-tuning
• Knowledge of Cloud AI services: Azure OpenAI, AWS Bedrock, GCP Vertex AI
• Basic understanding of information security processes (SOC, Incident Response, AppSec, GRC)
• Familiarity with NIST AI RMF, EU AI Act, or other AI regulations
• Experience building multi-agent systems
• AI or Cloud certifications

Personal Qualities:

• Practitioner mindset — not just understanding LLMs, but having built real solutions
• Self-sufficiency — ability to take ownership from problem to solution without micromanagement
• Strong communication skills — able to explain complex topics in simple terms to non-AI teams
• Curiosity and adaptability in a fast-evolving AI landscape
• Focus on delivering measurable business value
• Ability to lead by expertise — guiding teams without formal authority

We offer what matters most to you:

• Competitive salary: we guarantee a stable income and annual bonuses for your personal contribution. Additionally, we have a referral program with rewards for bringing in new colleagues to Raiffeisen Bank. 
• Social package: official employment, 28 days of paid leave, additional paternity leave, and financial assistance for parents with newborns. 
• Comfortable working conditions: possibility of a hybrid work format, offices equipped with shelters and generators, modern equipment. 
• Wellbeing program: all employees have access to medical insurance from the first working day; consultations with a psychologist, nutritionist, or lawyer; discount programs for sports and purchases; family days for children and adults; in-office massages. 
• Training and development: access to over 130 online training resources; corporate training programs in CX, Data, IT security, leadership, agile, сorporate library. 
• Great team: our colleagues form a community where curiosity, talent, and innovation are welcome. We support each other, learn together, and grow. You can find like-minded individuals in over 15 professional communities, reading clubs, or sports clubs. 
• Career opportunities: we encourage advancement within the bank across functions. 
• Innovations and technologies: Infrastructure: AWS, Kubernetes, Docker, GitHub, GitHub actions, ArgoCD, Prometheus, Victoria, Vault, OpenTelemetry, ElasticSearch, Crossplain, Grafana. Languages: Java (main), Python (data), Go (infra, security), Swift (IOS), Kotlin (Android). Data stores: Sql-Oracle, PgSql, MsSql, Sybase. Data management: Kafka, AirFlow, Spark, Flink. AI: building expertise and actively integrating into processes. 
• Support program for defenders: we maintain jobs and pay average wages to mobilized individuals. For veterans, we have a support program and develop the Bank’s veterans community. We work on increasing awareness among leaders and teams about the return of veterans to civilian life. Raiffeisen Bank has been recognized as one of the best employers for veterans by Forbes. 

Why Raiffeisen Bank? 

• Our main value is people, and we support and recognize them, educate them and involve them in changes. Join Raif’s team because for us YOU matter! 
• One of the largest lenders to the economy and agricultural business among private banks. 
• Recognized as the best employer by EY, Forbes, Robota.ua, Stud-Point, Delo.UA, NV, Odgers, UAFIC. 
• The largest humanitarian aid donor among banks (Ukrainian Red Cross, UNITED24, Superhumans, СМІЛИВІ). 
• One of the largest IT product teams among the country’s banks. 
• One of the largest taxpayers in Ukraine; 6 billion UAH were paid in taxes in 2025. 

Opportunities for Everyone: 

• Raif is guided by principles focused on human development and the well-being of 5,000 employees and over 2.5 million clients. 
• We uphold the principles of diversity, equity, and inclusion. 
• We are open to hiring veterans and people with disabilities and are ready to adapt the work environment to meet your specific needs. 
• We collaborate with students and experienced professionals alike, creating opportunities for growth at every stage of a career 

You matter at Raif! 

Want to learn more? — Follow us on social media:

Facebook, Instagram, LinkedIn

• Project Description:

  One of the world's largest providers of products and services to the energy industry requires the development, support, and integration of software systems in the Oil & Gas domain. These systems include capabilities such as data acquisition from hardware and software components, machine control, cloud connectivity, process automation, and user interaction. You will be part of a cross-functional team. The project is stable, long-term, and continually adopts new technologies. The project follows the SCRUM methodology.

   

• Responsibilities:

  Design, develop, and maintain backend services and RESTful APIs using Python and Flask
  • Implement messaging solutions with RabbitMQ and MQTT
  • Work with MongoDB and Redis for efficient data storage and caching
  • Develop robust and scalable features using multithreading
  • Write clean, maintainable, and well-documented code with proper version control using Git
  • Containerize applications and manage development environments using Docker
  • Ensure code quality through unit testing (e.g., pytest) and participate in code reviews
  • Collaborate with team members using Azure DevOps and other Azure services
  • Monitor and troubleshoot system performance, contributing to continuous improvement efforts

   

• Mandatory Skills Description:

  • Python 2+ years of experience
  • RabbitMQ, MQTT
   • Multithreading
   • REST API
   • Docker
   • Git
   • Azure (e.g., Azure DevOps, Azure Deck)
   • Unit Testing: Pytest

   

• Nice-to-Have Skills Description:

  OpenAPI
  asyncio / aiohttp
  numpy/pandas

   

• Languages:
  • English: B2 Upper Intermediate
  • Ukrainian: C2 Proficient

Project Description:

One of the world's largest providers of products and services to the energy industry requires the development, support, and integration of software systems in the Oil & Gas domain. These systems include capabilities such as data acquisition from hardware and software components, machine control, cloud connectivity, process automation, and user interaction. You will be part of a cross-functional team. The project is stable, long-term, and continually adopts new technologies. The project follows the SCRUM methodology.

Responsibilities:

Design, develop, and maintain backend services and RESTful APIs using Python and Flask
• Implement messaging solutions with RabbitMQ and MQTT
• Work with MongoDB and Redis for efficient data storage and caching
• Develop robust and scalable features using multithreading
• Write clean, maintainable, and well-documented code with proper version control using Git
• Containerize applications and manage development environments using Docker
• Ensure code quality through unit testing (e.g., pytest) and participate in code reviews
• Collaborate with team members using Azure DevOps and other Azure services
• Monitor and troubleshoot system performance, contributing to continuous improvement efforts

Mandatory Skills Description:

• Python 2+ year of experience
• RabbitMQ, MQTT
 • Multithreading
 • REST API
 • Docker
 • Git
 • Azure (e.g., Azure DevOps, Azure Deck)
 • Unit Testing: Pytest

Nice-to-Have Skills Description:

OpenAPI
asyncio / aiohttp
numpy/pandas

Languages:

English: B2 Upper Intermediate

Ukrainian: C2 Proficient

Location: Europe (Remote)
Seniority: Middle/Senior
Format: Full-time

As a Middle/Senior Recruiter, you will be responsible for driving end-to-end recruitment for mid- to senior-level roles across marketing, tech, and operations. You will partner directly with hiring managers and department leads to ensure fast and high-quality hiring processes. This role is ideal for someone who enjoys working in a fast-paced environment, has a deep understanding of digital/tech talent markets, and can influence stakeholders while providing a best-in-class candidate experience.

Key Responsibilities

• Manage the full recruitment cycle: from intake meeting with hiring managers to offer acceptance.
• Build strong pipelines for roles across Marketing, Tech (AI/Python/Infrastructure), and Operations.
• Partner with leadership to define hiring priorities and workforce planning in Warsaw & across Europe.
• Actively source candidates using LinkedIn, job boards, referrals, and networking events.
• Own interview processes in PeopleForce (ATS), ensuring smooth candidate tracking and reporting.
• Provide market insights, salary benchmarks, and recommendations to hiring managers.
• Contribute to employer branding activities (job ads, social media posts, recruitment campaigns).
• Mentor junior recruiters/recruitment interns when needed.
   

Requirements

• 4+ years of experience in recruitment, preferably in tech / digital marketing industries.
• Strong sourcing and headhunting skills (LinkedIn Recruiter, Boolean, networking).
• Proven track record of hiring for senior/complex roles in international markets.
• Good communication in English (B2+);
• Knowledge of ATS systems (experience with PeopleForce is a big advantage).
• Ability to manage multiple vacancies simultaneously and deliver results under deadlines.
• Strong stakeholder management and influencing skills.

What it means to be part of our Team:

🎓Your professional and personal development:

• Multinational and intercultural experience
• Corporate library
• A world-class team to work with
• Growth opportunities
• Cutting-edge frameworks and technologies

🧘Well-being:

• Competitive salary
• Plenty of engaging team-building and social events
• Bonuses according to the policy
• 21 paid vacation days & 14 paid sick leaves;

 😌Working environment:

•  Cozy office in Warsaw, Kyiv available for you whenever you need it
•  Coffee, tea, Red Bull, sweets, fruits, and more snacks

💌 Interested?

We’re always on the lookout for passionate, driven, and curious people to join our team.If that sounds like you — we’d love to hear from you!

• Project Description:

  One of the world's largest providers of products and services to the energy industry requires the development, support, and integration of software systems in the Oil & Gas domain. These systems include capabilities such as data acquisition from hardware and software components, machine control, cloud connectivity, process automation, and user interaction. You will be part of a cross-functional team. The project is stable, long-term, and continually adopts new technologies. The project follows the SCRUM methodology.

   

• Responsibilities:

  Design, develop, and maintain backend services and RESTful APIs using Python and Flask
  • Implement messaging solutions with RabbitMQ and MQTT
  • Work with MongoDB and Redis for efficient data storage and caching
  • Develop robust and scalable features using multithreading
  • Write clean, maintainable, and well-documented code with proper version control using Git
  • Containerize applications and manage development environments using Docker
  • Ensure code quality through unit testing (e.g., pytest) and participate in code reviews
  • Collaborate with team members using Azure DevOps and other Azure services
  • Monitor and troubleshoot system performance, contributing to continuous improvement efforts

   

• Mandatory Skills Description:

  • Python 2+ year of experience
  • RabbitMQ, MQTT
   • Multithreading
   • REST API
   • Docker
   • Git
   • Azure (e.g., Azure DevOps, Azure Deck)
   • Unit Testing: Pytest

   

• Nice-to-Have Skills Description:

  OpenAPI
  asyncio / aiohttp
  numpy/pandas

BETER is a rapidly growing product company. We create competitive content supplemented with analytics. For more than 5 years, we have been organizing sports tournaments, broadcasts, and developing our own sports community. We hold 45,000+ events per month in esports and traditional sports, and our products are represented in 150+ countries worldwide.

We are looking for a hands-on Data Science Tech Lead to join our team and drive the development of sports analytics and prediction products. This role combines deep technical expertise in machine learning and mathematical modeling with team orchestration and delivery ownership.

You will work closely with the Engineering Manager and lead a team of 4 Data Science Engineers, helping transform business needs and production challenges into scalable data science solutions.

Responsibilities:

• Collaborate with the Engineering Manager to coordinate and support a team of 4 Data Science Engineers
• Collect and analyze business requirements, production issues, and product needs, transforming them into actionable data science tasks and backlog
• Analyze large volumes of sports, esports, and trading data
• Develop and improve sports prediction models using statistics and machine learning techniques
• Conduct, automate, and evaluate data-driven experiments
• Integrate mathematical and ML models into production workflows
• Participate in hands-on development and coding activities
• Perform code reviews and maintain high engineering and data science quality standards
• Ensure efficient execution and delivery of data science initiatives within the team

Requirements:

• Previous experience in a Tech Lead or team leadership role
• Strong hands-on programming skills in Python
• Advanced knowledge of databases and data processing
• Strong expertise in machine learning, statistics, and probability theory
• Experience building and deploying mathematical or predictive models
• Upper-Intermediate+ level of English
• Ability to balance technical leadership with hands-on engineering work

What we’re looking for:

This is primarily a hands-on engineering role. The main focus is building mathematical models, writing production-level code, and delivering real business impact through data science solutions.

At the same time, the role requires strong coordination skills — the ability to distribute work effectively within the team, support engineers, and ensure successful delivery together with the Engineering Manager.

Successful probation expectations:

During the probation period, we expect the successful delivery of a sports analytics or modeling product through:

• effective team orchestration,
• hands-on contribution to development,
• and high-quality execution of data science workflows.

Ideal candidate profile:

We would love to meet someone who is:

• proactive in communication and information gathering,
• focused on data-driven decision making,
• detail-oriented and demanding when it comes to production quality and best practices.

Also relevant:

• High-load real-time data environments, such as fintech, gaming, marketing analytics, computer vision, or similar domains, working with large-scale data streams.

We offer:

• Ability to work remotely
• Competitive and timely payment for services
• Flexible work schedule
• Personal mentoring and coaching
• Team building and corporate events
• 100% paid sick leave
• 20 working days of paid vacation
• Paid child care leave

Lead Software engineer
We are launching a E-commerce startup and need an experienced freelance developer-consultant

Requirements:

• 5+ years of experience
• React + TypeScript, Node.js 
• Responsibility, product approach, broad thinking, initiative and high level of communication skills
• Intermediate or higher English
• High level of autonomy and creativity
   

It will be a plus:

• Experience in a technical lead position
• Working in product companies and AI

StellarTech is looking for a UA Manager (Meta Ads) to fully own and scale our Meta as a core acquisition channel.

This is a hands-on performance role with real ownership. You will personally manage campaigns while working on top of our automation systems and continuously improving scale and efficiency.
You won’t just optimize ads - you’ll help evolve how UA works at scale inside the company.

This role is for someone who wants:
    - channel ownership
    - large budgets
    - automation-first environment
    - real performance impact

What You'll Do:

• Own and scale Meta Ads campaigns end-to-end
• Manage and grow large monthly budgets with ROAS / LTV focus
• Launch, test, and scale campaign structures and strategies
• Work hands-on inside ad accounts
• Operate on top of and help evolve our UA automation algorithm
• Design and execute testing frameworks
• Drive creative and funnel experiments with product and creative teams
• Identify scalable growth levers
• Maintain campaign logic and process documentation

In Your First 3 Months, You Will:

• Take full hands-on ownership of Meta Ads performance
• Become fluent in our funnels, metrics, and automation logic
• Independently manage and optimize campaigns
• Identify key growth and scaling opportunities
• Contribute improvement ideas to automation and structure
• Deliver controlled performance scale

What We're Looking For:

• 3+ years in User Acquisition / Performance Marketing
• Strong hands-on experience with Meta Ads
• Experience managing significant paid social budgets
• Experience with subscription or B2C digital products
• Strong analytical and experimentation mindset
• Funnel understanding (web2web, web2app, or app)
• Strong Excel / Google Sheets skills
• English B1+

Nice to have:

• Experience with automation / rules / scripts 
• Mobile Measurement & Attribution knowledge 

Why You'll Love Working With Us:

• Innovative Environment: We're all about trying new things and pushing the envelope in EdTech.
• Freedom: Flexible role based either remotely or hybrid from one of our offices in Cyprus, Poland.
• Health: company-provided medical expense compensation.
• AI solutions: АІ subscription and other tools.
• Balance: Flexible paid time off, you get 21 days of annual leave + 10 bank holidays.
• Collaborative Culture: Work alongside passionate professionals who are as driven as you are.

We are SmartyMe — one of the leading microlearning apps in the world, used daily by millions of users across Tier-1 markets.
Our mission is to make learning a daily habit for everyone. We scale through performance marketing, product excellence, and systematic growth.

User Acquisition is a core growth engine for us. While we already operate at scale across paid channels, Google Ads is a fast-growing and strategically important direction that we are actively expanding as a standalone, owned growth channel.

We have strong internal UA expertise and infrastructure, and we’re ready to go deeper. This role is an opportunity to take full ownership of Google Ads and help build scalable acquisition systems on top of an already proven performance foundation.

Unlike Meta, where automation is already mature, here you’ll have the opportunity to build structure, processes, and automation systems from the ground up.
We work with a performance-based compensation model that allows us to pay at the top of the market for real results and impact.

What You’ll Do:

• Own and scale the Google Ads channel end-to-end, managing campaigns hands-on with a strong focus on ROI
• Launch, structure, and optimize campaigns across Search, GDN, Demand Gen, and Performance Max
• Build and evolve campaign architecture, processes, and channel structure for scalable growth
• Design and execute testing frameworks, driving continuous performance improvements
• Develop and implement automation, rules, and optimization systems on top of the channel
• Collaborate with analytics and product teams to improve funnel performance and conversion efficiency
• Identify and scale growth opportunities across keywords, creatives, audiences, and funnels
• Increase spend in a controlled way while maintaining efficiency targets
• Maintain clear documentation of campaigns, testing, and processes

What We’re Looking For:

• 1+ year in User Acquisition / Performance Marketing
• Strong hands-on experience with Google Ads
• Experience with Search, GDN, Demand Gen (Discovery), and Performance Max
• Proven experience scaling paid acquisition budgets
• Experience with subscription or B2C digital products
• Strong analytical mindset and experimentation approach
• Solid understanding of funnels (web2web, web2app, app — any mix)
• Ability to independently own and develop a growth channel

Nice to have:

• Experience with automation, rules, or scripts in Google Ads
• Experience building campaign structure and systems from scratch
• Advanced Excel / Google Sheets skills
• Experience working closely with product and analytics teams
• Previous experience in fast-scaling environments

Why You'll Love Working With Us:

• Innovative Environment: We're all about trying new things and pushing the envelope in EdTech.
• Freedom: Flexible role based either remotely or hybrid from one of our offices in Cyprus(Limassol), Poland (Warsaw).
• Health: company-provided medical expense compensation.
• AI solutions: АІ subscription and other tools.
• Balance: Flexible paid time off, you get 21 days of annual leave + 10 days of public holidays.
• Collaborative Culture: Work alongside passionate professionals who are as driven as you are.