Jobs at Djinni

Our Customer:

A global technology company developing real-time video augmentation and rendering infrastructure for broadcast and streaming environments.
 

Responsibilities:

• Design and implement a native video playback extension that augments HLS streams at runtime across platforms such as Android (ExoPlayer), webOS, Roku, and others;
• Build and maintain a cross-platform rendering layer using OpenGL for real-time video frame processing and compositing;
• Integrate GPU-based overlays and visual transformations directly into the playback pipeline with strict frame-accurate synchronization;
• Develop device-aware architecture to handle platform-specific decoding, rendering surfaces, hardware acceleration constraints, and performance tuning;
• Integrate external SDKs and APIs alongside an internal AR/graphics processing pipeline;
• Optimize rendering performance, memory usage, and latency under real-time streaming constraints;
• Collaborate with QA and Product teams to validate rendering accuracy, synchronization precision, and cross-device stability.
   

Required experience and skills:

• Strong experience with Kotlin;
• Strong hands-on experience with OpenGL (mandatory, core skill), including shader programming and GPU pipeline understanding;
• Solid knowledge of real-time rendering concepts (frame buffers, textures, shaders, synchronization, GPU/CPU interaction);
• Experience integrating OpenGL with native video playback surfaces;
• Practical experience with HLS streaming internals and playback customization;
• Strong understanding of video decoding/rendering pipelines and frame timing control;
• Experience with native video players on at least one of the following platforms: Android (ExoPlayer), webOS, RokuTV;
• Experience implementing low-latency video overlays and graphical composition;
• Understanding of hardware acceleration and performance optimization on embedded/TV devices;
• Proven background in full-cycle software engineering (integration, profiling, debugging, optimization);
• English — Upper-Intermediate+.
   

Working conditions

5-day working week, 8-hour working day;

All UA public holidays are days off;

Vacation and sick leave are covered by the company;

Remote work.

Job Description

We are seeking a Senior Python Developer to join a project focused on integrating the company’s in-house billing platform with third-party invoicing systems. The primary goal of this project is to develop an API-based integration layer that enables automated transfer of billing data to the invoicing system, ensuring efficiency, accuracy, and scalability.

Working hours: overlap required 8am-1pm (EST)

Responsibilities:

• Design, develop, and maintain Python-based solutions, services, and APIs.
• Build scalable, reliable, and secure integration solutions in line with best practices.
• Participate in system architecture and design discussions to provide technical insights.
• Ensure high code quality through thorough testing, code reviews, and adherence to best practices.
• Troubleshoot, debug, and optimize complex integration workflows.
• Collaborate closely with the Project Manager to fully understand business requirements and expectations.

Qualifications

• 5+ years of professional experience in Python development and related frameworks.
• Proven experience designing and developing RESTful APIs.
• Experience in building integrations between both premise and cloud systems
• Strong understanding of cloud platforms (preferably AWS)
• Knowledge of databases, both SQL and NoSQL.
• Experience with version control systems (Git) and CI/CD pipelines.
• Excellent problem-solving abilities and ability to work independently in a fast-paced environment.
• Strong debugging and troubleshooting skills in complex technical setups.
• Experience with billing or financial systems (e.g., QuickBooks, SAP, NetSuite) is a plus.

Required Skills & Experience

• Strong expertise in Terraform, including module development and infrastructure

automation.

• Hands-on experience with GitHub Enterprise and cloud providers AWS and Azure.

• Solid understanding of CI/CD, cloud networking, and infrastructure as code

principles.

• Familiarity with cloud security practices, including IAM (Identity and Access

Management), RBAC (Role-Based Access Control), and CAS (Cloud Access Security)

concepts and implementation.

• Knowledge of other Terraform providers such as Databricks is a plus but not

mandatory.

• Excellent communication and collaboration skills, with the ability to work across

teams and stakeholders.

Preferred qualifications

• Work experience with Amazon Web Services (AWS): Ideally 5 years

•  Work experience with Python: 5 years

• Work experience with GitHub: Ideally 5+ years

• Work experience with Terraform: Ideally 5+ years

We’re a growing product team building modern web solutions in the fintech and entertainment domains.

We’re looking for a motivated Junior/Middle React / Node.js Developer who’s eager to learn from experienced mentors and grow into a strong Full-Stack Engineer.

📍 Location: Warsaw, Poland (on-site)
🕐 Start: ASAP
 

Requirements:

•  1–3 years of experience with React, Node.js, and TypeScript
•  Understanding of RESTful APIs and CRUD operations
•  Experience with PostgreSQL or MongoDB
•  Good knowledge of HTML5, CSS3 (and preprocessors like SCSS)
•  Familiarity with Git and Agile development
•  English: Intermediate or higher (spoken communication required)

Nice to have:

• Familiarity with CI/CD pipelines
• Basic Docker or AWS experience

Responsibilities:

• Development and maintenance of Front-end applications using React and Web Components;
• Development Backend using Node.js
• Optimization of application performance and scalability.
• Testing and debugging of code.
• Participation in technical discussions and collaborative development.

CONDITIONS:

— The trial period lasts 3 months;

— 15 vacation days per year included (1.25 days are charged every month);

— 5 sick days per year included.
 

We offer:

• On-site position in Warsaw
• Mentorship from senior developers
• Real growth path from Junior to Middle level
• Friendly team and stable environment
• Competitive salary (discussed individually)

💬 If you are ready to join our team and work on exciting projects in Full-Stack development using React / Node.js, we invite you to submit your resume. Join us and showcase your talent in building high-quality, scalable web and mobile applications.

Our mission at Geniusee is to help businesses thrive through tech partnership and strengthen the engineering community by sharing knowledge and creating opportunities🌿
We care about Trust, Partnership, Transparency, and Responsibility. We offer a safe, inclusive and productive environment for all team members, and we’re always open to feedback💜 If you want to work from home or work in the offices in Kyiv, Lviv or Warsaw with stable electricity and Wi-Fi , great — apply right now
 

Requirements:

● 3+ years of total experience as an Engagement Manager, Account Manager, Client Partner, Partnership Manager;
● Strong experience in preparing client proposals, tenders, and RFP/RFI responses;
● Strong research and analytical abilities;
● Excellent problem-solving skills and a proactive mindset;
● Exceptional communication and presentation skills;
● Strong time management skills with the ability to work independently and in asynchronous environments;
● Upper-intermediate or higher level of spoken and written English.

Nice to Have:

● Experience working with AWS Partnerships;
● Experience in partner engagement and enablement;
● Exposure to emerging technical partnerships;
● Basic understanding of Generative AI concepts;
● Experience working in a KPI-driven environment.

Responsibilities:

● Generating referred leads and supporting internal teams through AWS activities;
● Preparing and submitting opportunities via the AWS portal;
● Building network with AWS representatives;
● Work with AWS partner funding programs (MDF, PoC, MAP, etc.).

What will you get:

● Competitive salary and good compensation package;
● Exciting, challenging and stable startup projects with a modern stack;
● Corporate English course;
● Ability to practice English and communication skills through permanent interaction with clients from all over the world;
● Professional study compensation, online courses and certifications;
● Career development opportunity, semi-annual and annual salary review process;
● Necessary equipment to perform work tasks;
● VIP medical insurance or sports coverage;
● Informal and friendly atmosphere;
● The ability to focus on your work: a lack of bureaucracy and micromanagement;
● Flexible working hours (start your day between 8:00 and 11:30);
● Team buildings, corporate events;
● Paid vacation (18 working days) and sick leaves;
● Cozy offices in 2 cities ( Kyiv & Lviv ) with electricity and Wi-Fi ( Generator & Starlink);
● Compensation for coworking (except for employees from Kyiv and Lviv);
● Corporate lunch + soft skills clubs;
● Unlimited work from home from anywhere in the world (remote);
● Geniusee has its own charity fund.

You will work directly with the marketing team and support research, analytics, and execution across our education brands.

This role is ideal for someone analytical, structured, and ambitious — who wants to understand how marketing really works behind the scenes in a product company.

What You Will Do

Market & Audience Research

• Conduct market research in the global Health & Fitness niche
• Analyze competitors, positioning, funnels, and offers
• Study target audience segments and customer behavior
• Collect and structure insights for strategic decisions

Analytics & Performance Support

• Assist in analyzing marketing funnels and campaign performance
• Work with performance marketing data (traffic, CTR, CPA, ROAS, LTV)
• Support reporting and dashboard preparation
• Help identify growth opportunities based on data

Strategy & Product Marketing Support

• Support go-to-market research for new education products
• Assist in defining ICP and value propositions
• Help structure hypotheses for testing
• Participate in marketing planning sessions

Who We’re Looking For

• English level: B2  (mandatory)
• 6 moth –1 year of experience in digital marketing (internships/freelance count)
• Strong analytical mindset
• Interest in performance marketing and product strategy
• Basic understanding of digital marketing channels
• Comfortable working with spreadsheets and structured data
• Attention to detail and ability to work independently

• Strong desire to grow into a Marketing Strategist

   

What You’ll Get

• Real experience in an international product company
• Exposure to full-cycle marketing and product launches
• Mentorship from experienced marketers
• Fast professional growth
• Opportunity to grow into a Marketing Strategist role

You’ll be part of a dynamic, international team working on large-scale enterprise platforms for a leading U.S.-based client in the consulting and financial services sector. Our mission is to build impactful, high-tech solutions that streamline business operations, enhance efficiency, and drive digital transformation. 

We focus on solving real business challenges - developing robust platforms that support critical decision-making and operational excellence. Our projects span across continents, offering the opportunity to collaborate with top-tier professionals from around the world. Welcome to join a Global Team Driving Real-World Innovation. 

Requirements 

• 2.5+ years of commercial experience in front-end development 
• Strong knowledge of TypeScript, including modern language features 
• Solid knowledge of HTML5 / CSS3, including Flexbox, Grid layouts, animations, and cross-browser compatibility 
• 2.5+ years of hands-on experience with Angular (2+) 
• Experience with RxJS 
• Strong understanding of front-end development best practices 
• Solid knowledge of OOP principles and design patterns 
• Experience with Git, including Git-flow (branching, rebase, revert, cherry-pick) 
• Good understanding of core Angular concepts and latest features 

Nice-to-haves 

• Experience with code reviews 
• Experience creating projects from scratch 
• Basic understanding of .NET backend is an advantage 
• Strong learning ability and adaptability 
• Strong communication skills 

Core Responsibilities 

• Feature development and implementation 
• Participation in architecture and design decisions 
• Taking part in feature grooming and refinement sessions 
• Collaboration with cross-functional teams (Back-end, SQL, Business Analysts, QA, Designers) 
• Bug fixing and ongoing code improvements 

Expected qualifications 

• Build and deliver complex features with confidence 
  You take ownership of major parts of a project, building advanced features that meet both technical and business needs. 
• Make smart technical decisions and contribute to design discussions 
  You can design and implement solutions independently, and you help shape system architecture to support scalability and long-term goals. 
• Support and mentor junior developers 
  You share your experience with less-experienced teammates, offering guidance on code quality, design choices, and development best practices. 

What we offer   

• Continuous learning and career growth opportunities 
• Professional training and English/Spanish language classes   
• Comprehensive medical insurance 
• Mental health support 
• Specialized benefits program with compensation for fitness activities, hobbies, pet care, and more 
• Flexible working hours 
• Inclusive and supportive culture 

About the Company

 European deep-tech company developing innovative AI solutions at the intersection of sensor technology, data science, and machine learning. Our products transform complex data from physical sensors into accurate analytical insights for real-time decision-making across multiple industries, including environmental monitoring, product quality control, and applied research.

The team works at the intersection of artificial intelligence, signal processing, and experimental analytics, building advanced models for pattern recognition and predictive analysis based on complex datasets.

Responsibilities

-Process, clean, and validate data for building ML/DL models.

-Design, implement, and optimize Machine Learning and Deep earning models.

-Conduct experiments including training, testing, fine-tuning, and hyperparameter optimization.

-Analyze results and present insights clearly to the team.

-Improve data collection and preprocessing pipelines.

-Collaborate closely with the ML Lead and engineering team.

-Participate in selecting modeling approaches and experimental strategies.

-Work with sensor-generated and multidimensional datasets.

Requirements

-5+ years of experience in Data Science / Machine Learning / Deep Learning.

-Bachelor’s or Master’s degree in Computer Science, Engineering, Applied Mathematics, or a related field.

-Commercial experience building and deploying ML/DL models.

Strong understanding of algorithms:

-Classification and regression

-Clustering

-CNN and fully connected neural networks

-Time-series analysis

-Experience working with databases (SQL or solutions from Oracle Corporation).

Practical experience with:

-Python

-PyTorch or TensorFlow

-scikit-learn

-NumPy, Pandas

-Experience training models in cloud environments (e.g., Amazon Web Services).

-Experience working in a Linux environment.

-Experience using Git.

-English level sufficient for technical communication.

Nice to Have

-Experience working with sensor or experimental datasets.

-Understanding of signal processing or pattern recognition.

-Experience building experimental ML pipelines. 

Our Customer:

A global technology company developing real-time video augmentation and rendering infrastructure for broadcast and streaming environments.
 

Your tasks:

• Develop and maintain the backend pipeline to monitor, synchronize, and manage data workflows both in the cloud and on on-premises servers.
• Integrate and manage modules written in C++ and Node.js to ensure seamless system performance.
• Implement a robust metadata system on AWS, ensuring secure access to S3 and optimized performance.
• Design and implement scalable backend architecture (Node.js) for efficient data distribution and pipeline control.
• Build and maintain a user-friendly monitoring dashboard to track pipeline status and performance in real-time.
   

Required Experience and Skills:

• Over 8 years of experience in backend development
• Proficient in Node.js and AWS
• Strong expertise in designing large-scale client-server architectures
• Deep understanding of browser internals, including rendering, JavaScript execution, network requests, memory management, and security mechanisms
• English – Upper-Intermediate
   

Would be a plus:

• Experience in database management, especially MySQL
• Experience in real-time C++ programming
• Experience in sports broadcasting and augmented reality (AR) technologies
   

Working conditions

5-day working week, 8-hour working day;

Remote work.

About the project

Fintech project

Welcome bonus $1000 ❤️‍🔥

Requirements

• 5 + years of relevant experience in the IT industry, strong knowledge of including ECMAScript;
• 4 + years of experience with Node;
• Experience with NestJS;
• Experience with AWS;
• Experience with Aurora RDS;
• Experience with Serverless;
• Experience with NoSQL, PostgreSQL;
• Experience with Cognito;
• Experience with CI automation and test cases;
• English: Upper-intermediate.

Would be a plus

• Experience with Plaid integration;
• Experience with Google Cloud architecture.

What you will get

• Competitive compensation depending on experience and skills;
• English classes;
• Exciting and challenging projects all over the world on a long-term basis;
• Flexible working hours;
• Career development opportunity;
• Health/Sports Benefits;
• Informal and friendly atmosphere, a lack of bureaucracy and micromanagement;
• Paid vacation (18 working days) and 10 sick leaves;
• Unlimited work from home (remote) or in the office.

At BetSymphony, we are embarking on an ambitious project to revolutionize the online gambling industry. Our vision is to develop a cutting-edge gambling platform that will serve as the backbone for multiple different brands, each with its unique identity and target audience. This platform will leverage the latest technologies to ensure a seamless, secure, and engaging experience for users across the globe.

As a Middle Scala Developer on our team, you will play a pivotal role in bringing this vision to life. You will be involved in every stage of the development process, from initial design to deployment, focusing on creating a scalable, high-performance backend system that can support the diverse needs of multiple brands.

Working on this project will expose you to the latest technologies and challenges in software development, offering ample opportunities for growth and innovation. You will be part of a dynamic team that values creativity, collaboration, and a commitment to excellence.

You will be an excellent fit for this position if you have:

• At least 3 years of experience building backend systems.
• At least 2 years of experience working with Scala.
• Experience building RESTful APIs / WebSockets.
• Proficient in Scala and its ecosystem (e.g., Akka, Play Framework, SBT).
• Experience working with distributed messaging systems such as Kafka, ActiveMQ, RabbitMQ, etc.
• Experience with microservices architecture.
• Containerisation technologies (e.g., Docker, Kubernetes).
• Strong understanding of software design patterns, data structures, and algorithms.
• Experience with database technologies (SQL and NoSQL).
• Familiarity with cloud services (AWS, GCP, or Azure) and DevOps tools (CI/CD pipelines).
• Strong written and verbal communication skills in English (B2)
• Be able to work in a multicultural work environment.
• Strong problem-solving skills.
• Self-organized and able to quickly learn new technologies and paradigms.

Desirable:

• Experience with JIRA and Confluence.
• Experience with ZIO and/or Typelevel stack (CATS etc.)
• Experience with Couchbase DB
• Experience with ElasticSearch
• Experience in gambling or online gaming.
• Experience with TDD development processes. 
• Strong interest in applying AI-powered tools (e.g., ChatGPT, Copilot, Curso,r or similar) to speed up day-to-day development tasks.
• Proven ability or strong motivation to use AI to reduce development time, improve code quality, and automate repetitive engineering work.
• Experience in leveraging AI for code generation, refactoring, debugging, test creation, and documentation.
• Openness to experimenting with new AI tools and workflows and integrating them into the development process.

Here are some of the things you’ll be working on:

• New features development within the existing product.
• Communicating with team members and the Product team.
• Resolving technical problems as they arise.
• Bug fixing of newly developed features (no refactoring of the old code).
• Writing Unit tests and integration tests.
• Scrum ceremonies participation.
• Mentoring middle and junior colleagues might be required.

The Calendars builds an iOS app used by millions of people every day to plan their time. We’re looking for an iOS Engineer who wants to work on a large-scale product, contribute to the development of key features, and build a high-quality user experience as part of a strong team.

What you will do:

• Implement, document, maintain existing application functionality.
• Enhance the application's responsiveness. Identify and rectify bottlenecks and bugs.

• Collaborate with UX/UI designers to transform design mockups and wireframes into fully functional and visually appealing iOS application

   

About you:

• Experience developing applications using Swift and Objective-C.
• Understanding of iOS design principles, interface guidelines, and best practices.
• Strong understanding of SOLID, OOP patterns, concurrency patterns.
• Proficient in memory management and performance tuning.

• Comfortable working with UIKit, SwiftUI, Foundation, Combine, GCD, Swift Concurrency.

   

Would be a plus:

• Experience of working with calendar-related applications e.g. time zones, recurreint events, etc.
• Intstuments
• CI/CD
• StoreKit

What you will get at Readdle:

• Customer-centric culture. We put our users at the heart of everything we do. Every team member has the opportunity to engage directly with customers, gaining insights that shape meaningful, delightful experiences for millions worldwide.
• Relentless growth. We’re committed to mastery in our craft. We take ownership of our work, decisions, and outcomes, and we see feedback as a catalyst for growth. Every challenge is an opportunity to learn, evolve, and raise the bar.
• Exceptional people, exceptional team. Our greatest strength is our people. We care deeply about each other, work transparently, and celebrate collective success. Together, we build an environment where everyone can do their best work and grow beyond their potential.
• Real impact. We design products that truly matter. Our focus is on delivering tangible value, simplifying complexity, pushing boundaries, and continuously improving how we build and deliver solutions to our users.
• Culture of innovation. We embrace curiosity and creativity in everything we do. Fresh ideas are not just welcomed, they’re expected, celebrated, and turned into real innovations that shape the future of our products and company.

Our Customer:

Our client is a fast-growing cybersecurity technology company developing a large-scale platform for simulating cyberattacks and assessing security posture. The product includes complex web interfaces, high-load backend services, and cloud-native components.
 

Your Tasks:

• Design, develop, and maintain advanced frontend features using React and modern JavaScript (ES6+).
• Build complex UI components, interactive dashboards, and scalable, reusable component libraries (including Storybook).
• Own and evolve the frontend architecture, ensuring high performance, maintainability, and a consistent user experience across the platform.
• Optimize rendering behavior and application performance, minimizing unnecessary re-renders and improving perceived UI responsiveness.
• Collaborate closely with product managers, designers, and backend engineers to deliver high-quality features end to end.
• Participate in technical discussions, frontend architecture decisions, and code reviews.
• Integrate frontend applications with backend APIs (Node.js-based services).
• Work with Git-based workflows and CI/CD pipelines to ensure smooth delivery and deployment.
• Ensure clean, testable, and well-documented code following frontend best practices.
   

Required Experience & Skills:

• 5+ years of professional experience in frontend or web development.
• Senior-level expertise in React and the modern frontend ecosystem.
• Excellent command of JavaScript, with a deep understanding of how the language works (execution context, async behavior, data handling).
• Strong experience designing and maintaining reusable UI components and design systems (Storybook or similar).
• Solid understanding of frontend application architecture, state management strategies, and data flow patterns.
• Experience optimizing React applications for performance and scalability.
• Working knowledge of backend integration (REST APIs, Node.js services).
• Experience working with relational and/or NoSQL databases (e.g., PostgreSQL, MongoDB) at an integration level.
• Familiarity with CI/CD pipelines and modern development workflows.
• Strong focus on code quality, testing, and maintainability.
• English — Upper-Intermediate+ (written and spoken).
   

Working conditions

5-day working week, 8-hour working day;

All UA public holidays are days off;

Vacation and sick leave are covered by the company;

Remote work.

About Us:

We are building technology that makes sustainability and decarbonization core elements of modern business. Our software provides partners with advanced carbon management tools that simplify compliance, reduce emissions, and support success in a sustainable economy.

Our mission is to automate and scale carbon management processes, helping companies optimize operations, reduce emissions across products and supply chains, and contribute meaningfully to the fight against global climate change.

Position Overview:

We are seeking a highly skilled and versatile Senior Backend / Data Engineer to join our team in Berlin.

You bring strong expertise in data engineering, solid Python skills, and hands-on experience with AWS. You are comfortable designing and managing complex data processes and cloud infrastructures.

Responsibilities:

• Develop and maintain backend architecture and scalable data pipelines;
• Collaborate closely with product managers and engineers to build a world-class data platform;
• Shape core data capabilities and contribute to strategic technical decisions;
• Ensure reliability, performance, and scalability of data systems in production.

Requirements:

• 5+ years of experience working with large-scale data in production environments;
• Strong proficiency in Python;
• Experience with web frameworks;
• Strong DevOps knowledge and hands-on experience with infrastructure and deployment processes;
• Hands-on experience with AWS, CloudFormation, and CDK for infrastructure management;
• Strong understanding of scalable databases and cloud-based data pipelines;
• Excellent communication and teamwork skills;
• Openness to learning, experimenting, and acknowledging knowledge gaps;
• Upper-Intermediate English or higher.

Nice to have:

• Proficiency in TypeScript.

What We Offer:

• A key role in advancing impactful climate technology;
• Strong growth opportunities within a rapidly expanding company;
• A dynamic and supportive work environment that values innovation, initiative, and diversity.

We are looking for an experienced SQL Developer with deep, practical expertise in MS SQL Server, with a focus on query optimization, performance tuning, and the design of efficient database schemas. A key part of this role is reviewing, analyzing, and improving existing SQL and schema structures on the OLTP systems.

Requirements

• 3+ years of hands-on experience with MS SQL Server as a SQL Developer.
• Demonstrated practical experience in SQL query optimization.
• Strong skills in analyzing execution plans, designing indexing strategies, and tuning performance.
• Strong ability to write clean code in accordance with the project's technical requirements.
• Solid knowledge of OLTP database design principles and best practices.
• Ability to present real examples of performance improvements or schema redesigns you have implemented.

Core Responsibilities

• Create database objects/write stored procedures.
• Analyze and optimize slow SQL queries in MS SQL Server (joins, subqueries, etc.).
• Work with execution plans, indexes, statistics, and partitioning to enhance performance.
• Demonstrates the ability to clearly understand and effectively analyze business requirements.
• Collaborate with developers to ensure efficient SQL and schema use across the platform.
• Propose structural, architectural, and performance-oriented improvements.

What we offer

• Continuous learning and career growth opportunities
• Professional training and English/Spanish language classes
• Comprehensive medical insurance
• Mental health support
• Specialized benefits program with compensation for fitness activities, hobbies, pet care, and more
• Flexible working hours
• Inclusive and supportive culture