Jobs at Djinni

Overview:
We are looking for an experienced Senior Flutter Engineer to continue the development and optimization of cross-platform applications for mobile and embedded Android devices. This role focuses on delivering high-quality UI/UX, improving application performance, and refining developer workflows. You will collaborate closely with designers, architects, and backend engineers to implement robust, user-centric features using modern tools and best practices.

Responsibilities

• Develop and optimize Flutter-based applications for mobile and embedded Android platforms;
• Implement performant, maintainable UI/UX features based on product and design requirements;
• Integrate secure RESTful APIs, including client-side certificate authentication;
• Enhance integration with existing video streaming infrastructure, with a focus on UX quality and performance;
• Apply modern Flutter development practices such as state management, hot reload, and automated testing;
• Collaborate with cross-functional teams to ensure seamless integration with backend services and CI/CD pipelines.

Requirements

• 5+ years of professional experience in software development, with strong focus on Flutter;
• Proven experience building Flutter applications for mobile and embedded Android devices;
• Strong knowledge of Dart, Flutter widgets, state management solutions, and performance profiling;
• Hands-on experience integrating secure APIs over HTTPS, including client-side certificates;
• Experience working with modern developer tooling, automated testing frameworks, and CI/CD pipelines;
• Exposure to video streaming SDKs and multimedia-focused UX optimization is a strong plus;
• Bonus: Experience with AR features, Bluetooth/Wi-Fi communication, or e-commerce platform integrations.

✨ Join Win Media as a Account Manager – Make Every Player Feel Like a Star! 
 

At Win Media, we believe that success in iGaming is built on strong relationships 🎯. Our Account team ensures that the most valuable players feel appreciated, understood, and engaged. If you’re empathetic, detail-oriented, and passionate about delivering top-class service — this role is for you!
 

📌 About the Role
We are looking for a dedicated Account Manager (evening & weekend shifts) to join our team. 🕕🌙
Your mission will be to keep our players happy, loyal, and profitable through personalized communication, proactive care, and exceptional service.

Schedule: Shift-based
Location: Fully remote 🌍 or Warsaw office 🏙️
 

🛠️ Responsibilities

📧 Handle daily written communication with players (email, WhatsApp, Telegram)
💌 Write at least 40+ personalized messages per day to maintain strong connections
🎯 Achieve KPIs for VIP Retention, Avg. Deposit Count, Avg. Deposit Sum
🔄 Reactivate inactive players and build long-term loyalty
🤝 Collaborate with Support and Payments teams to resolve VIP issues quickly
📝 Maintain daily reports on activities and results
 

✅ Requirements
🌍 2+ years in Customer Support / Account Management OR 1+ year as a VIP Manager
🎲 Experience in the iGaming / Casino industry is a must-have
🗣️ Advanced written English
➕ German or French language skills are a huge advantage and will increase salary
🧠 Strong emotional intelligence: ability to handle negativity, show empathy, and adapt communication style

👤 The Ideal Candidate

Has prior experience as a VIP Manager or Customer Support in online casinos
Fluent in English (Advanced) and ideally one more language (German/French) 🌍
Empathetic, responsible, hardworking, with excellent communication and problem-solving skills
Understands casino mechanics, including bonus systems 🎲
Thrives in a fast-paced, player-first environment

🎁 What We Offer

👥 Join a professional team with a strong vision and support system
🚀 Career growth with the potential to lead the VIP Department in the future
🏙️ Flexible work setup: remote or from our Warsaw office
🌴🤒 Paid vacation and sick leave
💻 Modern equipment to ensure smooth workflow
🎉 Fun company culture with gifts for holidays and birthdays

✨ Let’s win together with Win Media! ✨

Headway Inc is a global tech company, revolutionizing lifelong learning by creating digital products for over 150 million users worldwide. Our mission is to help people grow. We’re proud to be ranked 4th among the World’s Top EdTech Сompanies by TIME magazine. We believe lifelong learning should be accessible, personalized, and impactful to each individual. That’s how we change the world and why we bring together exceptional minds.

Together with Vlada Dzhobolda, Design Team Lead (Organic Growth Team) at Headway Inc, we’re looking for a Freelance Graphic Designer to create engaging visuals for our Headway blog.

Why it’s exciting to work with us:

• We’re a data-driven company, so you’ll clearly see the impact of your design decisions through real performance metrics.
• We offer flexible working hours – you can plan your time and projects the way it suits you best.
• We ensure a stable and predictable flow of tasks, so you can focus on creativity without chasing clients.

What will you do:

• Create engaging visuals for blog articles, both to enrich the copy and convert users (main focus on raster images and data visualization).
• Localize images for different languages and markets.
• Resize image assets.
• Potentially create visual content for Pinterest.
• Take care of assets and the template library to stay organized and speed up the creative workflow.

What do you need to join us:

• 2+ years of experience in marketing design, blog design, or SMM design.
• Advanced proficiency in Figma.
• Experience with AI tools for image generation (e.g., Sora, Nano Banana, Midjourney, or similar), including strong prompt-writing skills.
• Solid understanding of composition, typography, and color theory.
• Ability to work with a high volume of tasks.
• Experience with data visualization (infographics).
• English at B1+ level.
• Strong time-management skills and ability to meet deadlines.
• Nice to have an understanding of SEO principles and how search engines work.

Are you interested?

Send your CV and Portfolio!

Headway Inc is a global tech company, revolutionizing lifelong learning by creating digital products for over 150 million users worldwide. Our mission is to help people grow. We’re proud to be ranked 4th among the World’s Top EdTech Сompanies by TIME magazine. We believe lifelong learning should be accessible, personalized, and impactful to each individual. That’s how we change the world and why we bring together exceptional minds.
 

The core of our achievements is our team. We believe in people and shared values SELECT. That’s why, together with Anastasiia Zinchenko, Head of Creative Marketing at Headway Inc, we’re looking for an experienced Creative Marketing Specialist to join our team of superstars transforming the EdTech industry.
 

The product you will be working with:

Goodly is a fast-moving R&D project on a mission to help people live, work, and learn with more joy and clarity. We’re building a fresh experience that combines thoughtfully designed physical products and playful digital tools.

We're just getting started, and this is your chance to join us at the beginning — where ideas aren’t just welcome, they’re expected. We're looking for people who are brave enough to lead, bold enough to decide, and curious enough to invent what doesn't exist yet.

Why this is exciting:

• R&D Environment: be a pioneer — design new creative formats that shape the marketing strategy of a global product.
• Fast feedback loops: see the impact of your ideas within days of launch.
• Freedom to experiment: minimal bureaucracy — test bold ideas end to end.
• Full-funnel data access: understand exactly how your creative influences key business metrics.
• Global reach: work across the US, Europe, Latin America, and Asia.
• Supportive growth culture: a team built on mutual support, continuous learning, and shared wins.

What will you do:

• Generate creative hypotheses based on user research, market trends, and performance data.
• Develop concepts and scripts for video, static, and interactive creatives.
• Prepare clear briefs for designers, copywriters, and actors/UGC creators to execute efficiently.
• Analyze test results (A/B & experiments), extract insights, and iterate on the approach.
• Stay on top of trends across social platforms, the advertising industry, and broader culture.
• Participate in workshops and brainstorms with team leads and cross-functional partners.
• Document experiments (what worked/what didn’t).

What do you need to join us:

• 1+ year of experience in performance marketing (SMM, Content Producer, UGC Creator, Creative Marketing Specialist, Creative Producer).
• Solid grasp of performance marketing fundamentals and the role creative plays in driving results.
• Idea generation mindset: produce unconventional ideas and frame them as testable hypotheses.
• Structured, systematic work style with strong organization and follow-through.
• Analytical thinking: comfortable with marketing metrics, experimentation, and large data sets.
• Critical evaluation skills: assess concepts, identify potential, and improve them based on data.
• English level B1 or higher.
• Alignment with the values of our team (SELECT).

What do we offer:

• Work within an ambitious team on a socially impactful education product.
• An office with a reliable shelter, generators, satellite internet, and other amenities.
  Access to our corporate knowledge base and professional communities.
• Personal development plan.
  Compensation for English language learning, external training, and courses.
• Medical insurance and full sick leave compensation.
  Company doctor and massage in the office.
• Sports activities: running, yoga, boxing, and more.
• Corporate holidays: we go on a week-long holiday to rest and recharge twice a year.
• Supporting initiatives that help Ukraine. Find out more about our projects here.

Working schedule

This is a full-time position with a hybrid remote option. It means that you can decide for yourself whether you want to work from the office, remotely, or combine these options.

Are you interested?

Send your CV!

Headway Inc is a global tech company, revolutionizing lifelong learning by creating digital products for over 150 million users worldwide. Our mission is to help people grow. We’re proud to be ranked 4th among the World’s Top EdTech Сompanies by TIME magazine. We believe lifelong learning should be accessible, personalized, and impactful to each individual. That’s how we change the world and why we bring together exceptional minds.

The core of our achievements is our team. We believe in people and shared values SELECT. That’s why, together with Yulia Mamonova, Head of Organic Growth at Headway Inc, we’re looking for a SEO Manager to join our team of superstars transforming the EdTech industry.

What product will you be working on?

Nibble is an all-around knowledge app for adult learners. It offers short, interactive lessons on different topics, from art to math. Nibble has been featured as App of the Day in over 50 countries, including the US, the UK, and Canada.

Why this is exciting:

• An opportunity to join a key SEO unit and drive strategic decisions.
• A professional, supportive team environment where growth feels safe and natural.
• Direct impact on shaping and building a brand-new unit and its ways of working.
• High visibility of results — with plenty of room for both vertical and horizontal growth with strong performance.
• Significant space and resources for experimentation and bringing ideas to life.

What you’ll do:

• Develop and execute the organic growth (SEO) strategy to support the launch and growth of the Nibble app website in search.
• Run market, keyword, and competitor research; build and prioritize a keyword roadmap to attract the right audience.
• Collaborate closely with colleagues in growth marketing, content marketing, product teams, and others.
• Introduce and roll out new SEO tools and technologies to scale impact.
• Monitor performance, analyze results, and share clear insights and updates with the Organic Growth team and stakeholders.

You’ll be a great fit if you:

• 3+ years of hands-on SEO experience.
• A strong belief in SEO as a key growth channel and a clear understanding of how it drives sustainable business impact.
• Strong analytical skills and a data-driven mindset — comfortable working with metrics, forming hypotheses, and validating decisions with data.
• Experience working in a product environment and partnering with cross-functional teams.
• Communicate confidently in English (Upper-Intermediate+).
• Share our SELECT values and enjoy working as part of a collaborative, driven team.

What do we offer:

• Work within an ambitious team on a socially impactful education product.
• An office with a reliable shelter, generators, satellite internet, and other amenities.
• Access to our corporate knowledge base and professional communities.
• Personal development plan.
• Compensation for English language learning, external training, and courses.
• Medical insurance and full sick leave compensation.
• Company doctor and massage in the office.
• Sports activities: running, yoga, boxing, and more.
• Corporate holidays: we go on a week-paid holiday to rest and recharge twice a year.
• Supporting initiatives that help Ukraine. Find out more about our projects here.

Working schedule

This is a full-time position with a hybrid remote option. It means that you can decide for yourself: whether you want to work from the office, remotely, or combine these options.

Are you interested?
Send your CV!
 

Headway Inc is a global tech company, revolutionizing lifelong learning by creating digital products for over 150 million users worldwide. Our mission is to help people grow. We’re proud to be ranked 4th among the World’s Top EdTech Сompanies by TIME magazine. We believe lifelong learning should be accessible, personalized, and impactful to each individual. That’s how we change the world and why we bring together exceptional minds.

The core of our achievements — and our greatest value — is our team. We believe in people, in our shared values SELECT, and in the idea that fortune favors the bold.

Together with our Collaborative Marketing Team Lead, Nataliia, we’re looking for a UGC Specialist to scale creator partnerships and boost the performance of our UGC creatives.

The Collaborative Marketing team works across three core areas: influencer marketing, brand collaborations, and UGC advertising. The UGC direction is the largest and plays a key role in supporting our paid media efforts.

In this role, you’ll primarily work with UGC for physical products — collaborating with creators to produce ad-ready content that highlights real-life use, benefits, and emotions. You’ll also occasionally support digital products, applying the same performance-driven UGC approach.

Our focus is on creating scroll-stopping UGC ads that help the Creative Marketing team clearly communicate how our products make people’s lives better and drive results across paid channels.

You're a great match if you want to:

• Build and scale UGC ad strategies — working closely with creators to produce performance-driven ad content
• Turn product value and brand mission into scroll-stopping UGC ads that resonate with real users
• Experiment with new UGC ad formats, hooks, angles, and creator approaches to improve paid performance
• Develop long-term relationships with UGC creators that help continuously test, iterate, and scale ad creatives

What you'll be doing:

• Sourcing and communicating with UGC creators across different markets (US, LATAM, Europe).
• Managing the full creator workflow: negotiations, contracts, timelines, and deliverables.
• Writing clear, performance-oriented briefs and scripts tailored to each creator and ad hypothesis.
• Generating ideas for UGC ad tests, creative angles, hooks, and messaging variations.
• Analyzing UGC ad performance and optimizing creatives based on data and insights.

What you need to join us:

• 1+ year of experience in a similar role (UGC management, influencer marketing, performance marketing, copywriting, SMM, or advertising)
• Hands-on experience working with UGC or influencer content for physical products is a strong plus
• Basic understanding of key marketing and performance metrics
• Creativity combined with the ability to translate ideas into clear, actionable briefs
• Experience writing scripts or briefs for UGC creators or influencers
• Familiarity with Meta Ads Manager and/or TikTok Ads
• Analytical mindset — you rely on data to make decisions and improve results
• English proficiency at B2 level or higher
• Your superpowers: creativity, proactivity, and strong communication skills

What we offer:

• Work within an ambitious team on a socially impactful education product
• An office with a reliable shelter, generators, satellite internet, and other amenities
• Access to our corporate knowledge base and professional communities
• Personal development plan
• Compensation for English language learning, external training, and courses
• Medical insurance and full sick leave compensation
• Company doctor and massage in the office
• Sports activities: running, yoga, boxing, and more
• Corporate holidays: we go on a week-long paid holiday to rest and recharge twice a year
• Supporting initiatives that help Ukraine. Find out more about our projects here

Are you interested? Send your CV!

Headway Inc is a global tech company, revolutionizing lifelong learning by creating digital products for over 165 million users worldwide. Our mission is to help people grow. We’re proud to be ranked 4th among the World’s Top EdTech Сompanies by TIME magazine. We believe lifelong learning should be accessible, personalized, and impactful to each individual. That’s how we change the world and why we bring together exceptional minds.

The core of our achievements is our team. We believe in people and shared values SELECT. That’s why, together with Vladyslav Strykun, Chief Marketing Officer at Headway Inc, we’re looking for an SMM Lead to own and scale our group-wide SMM strategy — building the operating system, leading the team, and driving both performance results and long-term brand equity across multiple products.

Why is it interesting:

• An opportunity to shape SMM at the group level for a multi-product EdTech ecosystem with a multi-million social audience, including 5M+ followers on Instagram.
• Ability to focus on managerial and strategic tasks — we already have creative writers, designers, and a posting manager in the team.
• Building a dual-focus system that drives both performance and brand equity, powered by strong operations, a high-performing team, and data-driven reporting.
• Freedom to create new ideas, test hypotheses, and implement changes — we provide all the opportunities for their implementation
• Opportunities for professional growth with a supportive team — with a clear path to grow into a Head role.

What will you do:

• Own group-wide SMM strategy across Headway, Nibble, Skillsta, and new launches, aligned with positioning, GTM, and business goals.
• Build and run the SMM operating model: planning, production, QA, publishing, and cross-channel coordination.
• Lead and scale the team: hire, set operating principles, coach SMM Managers, and align designers/copywriters around priorities.
• Keep brands distinct by defining messaging, tone, and content guidelines across products.
• Partner with PMM, Brand, UA, Influencer, PR, and Product teams to support GTM and contribute to marketing and product funnels.
• Own analytics and insights: KPIs, dashboards, performance reviews, plus trend/competitor research to launch new formats and growth loops.

What do you need to join us:

• 3+ years of experience as an SMM Manager (at least 1 year as SMM Lead/Head) in an IT product company or digital agency.
• Skills in working with social media algorithms on Instagram, Facebook, and TikTok.
• Working with analytics, marketing funnels, and metrics (ER, ERR, ROI).
• Ability to generate ideas and analyse content through the prism of marketing goals.
• English proficiency at B2 level or higher.
• Alignment with the values of our team (SELECT).

What do we offer:

• Work within an ambitious team on a socially impactful education product.
• An office with a reliable shelter, generators, satellite internet, and other amenities.
• Access to our corporate knowledge base and professional communities.
• Personal development plan.
• Compensation for English language learning, external training, and courses.
• Medical insurance and full sick leave compensation.
• Sports activities: running, yoga, boxing, and more.
• Corporate holidays: we go on a week-paid holiday to rest and recharge twice a year.
• Supporting initiatives that help Ukraine. Find out more about our projects here.

Are you interested? Send your CV!

Headway Inc is a global tech company, revolutionizing lifelong learning by creating digital products for over 150 million users worldwide. Our mission is to help people grow. We’re proud to be ranked 4th among the World’s Top EdTech Сompanies by TIME magazine. We believe lifelong learning should be accessible, personalized, and impactful to each individual. That’s how we change the world and why we bring together exceptional minds.

The core of our achievements is our team. We believe in people and shared values SELECT. That’s why, together with Vladyslav Strykun, Chief Marketing Officer at Headway Inc, we’re looking for a Senior SMM Manager to work on promoting the brand of Headway by Headway Inc on social media and building a community around self-growth learning.

What product will you be working on?

Headway is our flagship app, offering summaries of nonfiction bestsellers, daily insights, and gamified challenges. Headway is the world’s most downloaded book summary app and has been featured as App of the Day in over 30 countries, including the US, the UK, and Canada.

Why is it interesting:

• An opportunity to join the development of an EdTech application that has a multi-million audience in social networks — more than 4.1 million followers on Instagram
• Ability to focus on managerial and strategic tasks — we already have a creative writer, designer, and posting manager in the team
• Freedom to create new ideas, test hypotheses, and implement changes — we provide all the opportunities for their implementation
• Your decisions and ideas will have a direct impact on the business
• Opportunities for professional growth with a team that is always ready to support you
• Constant exchange of experience with marketers from our team and other projects

What will you do:

• Analyse competitors and create an SMM strategy
• Manage Facebook, Instagram, and TikTok pages
• Develop pages on Quora, Pinterest, Reddit
• Implement the content plan together with a copywriter and designer
• Conduct brainstorming sessions
• Review and approve final content with the product team
• Build a network of creators and implement craft video content with contractors
• Analyse the performance of social platforms and prepare monthly reports

What do you need to join us:

• 1+ year of experience as an SMM Manager in an IT product or digital agency
• Working with analytics, marketing funnels, and metrics (ER, ERR, ROI)
• Project management skills
• Following innovations in social media
• Ability to generate ideas and analyse content through the prism of marketing goals
• Sharing the values of the team (SELECT)

What do we offer:

• Work within an ambitious team on a socially impactful education product
• An office with a reliable shelter, generators, satellite internet, and other amenities
• Access to our corporate knowledge base and professional communities
• Personal development plan
• Compensation for English language learning, external training, and courses
• Medical insurance and full sick leave compensation
• Company doctor and massage in the office
• Sports activities: running, yoga, boxing, and more
• Corporate holidays: we go on a week-paid holiday to rest and recharge twice a year
• Supporting initiatives that help Ukraine. Find out more about our projects here

Working schedule

This is a full-time position with a hybrid remote option. It means that you can decide for yourself: whether you want to work from the office, remotely, or combine these options.

Are you interested? Send your CV!

We are looking for experienced Sales Manager for Digital Marketing Agency!

Full-time / Part-time 

Remote 

About Agency:

Digital Marketing is a Dubai-based agency providing performance-driven marketing solutions across UAE, USA, and Europe. We help brands grow through social media management, paid advertising, and search marketing.

What You’ll Do

• Manage the full sales cycle: from lead generation to closing deals
• Close 3–5 new clients per month
• Build and maintain a sales pipeline and CRM system
• Identify and develop new sales channels and opportunities
• Communicate with international clients (UAE, US, Europe)

• Present and sell services:

   

  • Social Media Management (Instagram, TikTok, YouTube, Snapchat)
  • Paid Ads (Meta Ads, TikTok Ads, Snapchat Ads)
  • Google Ads & SEO services

   

• Collaborate with internal teams (marketing, project managers)

Requirements

• 2+ years of experience in sales (digital marketing preferred)
• Proven track record of closing deals consistently
• Experience working with international markets (UAE / US / Europe)

• Strong understanding of:

   

  • Digital marketing services
  • Current sales tools & outreach methods

   

• Ability to manage full-cycle sales independently
• Experience with CRM systems
• Strong negotiation and communication skills
• English: Advanced or higher

Nice to Have

• Experience selling SMM or performance marketing services
• Existing network or client base
• Experience with outbound sales (LinkedIn, cold emails, etc.)

What We Offer

• Competitive compensation (fix + commission / high % from deals)
• Opportunity to work with global clients
• Fast-growing agency environment
• Freedom to test and implement your own sales strategies
• Direct impact on company growth

Who We’re Looking For

• Result-oriented and proactive
• Reliable and accountable
• Strong team player
• Focused on performance and continuous improvement

Role Summary

We are looking for a Senior Data Scientist to lead the data intelligence layer of an AI-driven platform. This role focuses on extracting insights from structured and unstructured documents, building document processing and OCR pipelines, improving semantic retrieval systems, identifying information gaps in datasets, and maintaining high standards of data quality across end-to-end data workflows.
 

Key Responsibilities

• Design and improve OCR and document intelligence pipelines that convert complex PDFs and supporting files into structured, machine-readable data.
• Develop semantic retrieval workflows that identify relevant historical records and support recommendation systems based on similarity and contextual matching.
• Create data-driven methods to detect missing, incomplete, or inconsistent information within document-based datasets.
• Define and monitor data quality standards, validation rules, completeness checks, and anomaly detection mechanisms across data pipelines.
• Analyze structured and unstructured datasets to uncover patterns affecting operational performance, classification quality, and decision outcomes.
• Collaborate with machine learning engineers to prepare high-quality datasets for model training, validation, and iterative improvement.
• Develop labeling strategies, feature definitions, and dataset enhancement workflows for early-stage and production use cases.
• Evaluate the performance of retrieval systems, document extraction pipelines, and information coverage.
• Work closely with engineering and product teams to operationalize insights through dashboards, tools, and data-driven workflows.
• Communicate analytical findings, experiment results, and actionable insights clearly to technical and non-technical stakeholders.
   

Qualifications

• Bachelor’s or Master’s degree in Data Science, Computer Science, Statistics, Artificial Intelligence, or a related technical field.
• 5+ years of experience in data science, applied NLP, document intelligence, or analytics-focused roles. 
• Strong proficiency in Python and practical experience with data science libraries and NLP tooling. 
• Experience building document processing or OCR pipelines and working with semi-structured or noisy datasets.
• Strong understanding of embeddings, semantic search, retrieval evaluation, and similarity-based recommendation systems.
• Experience with data cleaning, validation, feature engineering, and dataset quality management.
• Ability to design experiments and translate analytical findings into product or model improvements.
• Strong SQL skills and solid analytical problem-solving abilities.
   

Nice to Have

• Experience working with AI systems in regulated or compliance-sensitive environments.
• Familiarity with multilingual NLP applications or systems that support multiple languages.
• Experience with vector databases or retrieval-augmented architectures.
• Exposure to annotation workflows and human-in-the-loop review processes.
• Experience building dashboards, defining operational KPIs, or supporting data-driven reporting.
  
  We offer:
• Flexible working schedule
• Fully remote work
• Compensation for medical, educational and sports activities
• Professional growth opportunities
• Internal knowledge-sharing talks
• Awesome team events and activities
• Paid vacation and sick leave

Trinetix is looking for a talented UI/UX Designer with strong experience in creating intuitive, user-centered digital products, including interfaces for AI-powered features such as chatbots and agentic systems. This role involves close collaboration with product managers, business analysts, and engineering teams to design seamless, accessible, and scalable user experiences. The ideal candidate is creative, detail-oriented, and comfortable translating complex functionality into clear and engaging designs. 
 

Requirements 

• 4+ years of experience in a UI/UX Designer role 
• Strong expertise in designing intuitive and user-friendly interfaces for web and mobile applications 
• Experience designing AI-powered features, including chatbots or intelligent/agentic systems 
• Proficiency in user research, usability testing, and translating insights into design solutions 
• Solid understanding of accessibility standards and inclusive design principles 
• Ability to collaborate closely with product, business, and engineering teams 
• Proficiency with design and collaboration tools such as Figma, Sketch, Adobe XD, Abstract, and Miro 
• Basic understanding of HTML/CSS to support effective collaboration with developers 
• Strong communication and presentation skills  
• Availability to work according to EST timezone (9 am - 5 pm EST) (14:00-22:00 CET) 
   

Nice-to-haves 

• Experience designing data-heavy or enterprise-level applications 
• Familiarity with Gen AI behaviors and human–AI interaction patterns 
• Experience working in Agile / SCRUM environments 
• Background in design systems or component-based design 
• Experience working with cross-functional and distributed teams 
   

Languages: 

English: at least Upper-Intermediate (B2, all of our clients speak English, and our designers often participate in conversations).
 

Core Responsibilities 

• Design intuitive, user-centered interfaces and experiences for web and mobile products 
• Create UX flows, wireframes, and high-fidelity UI designs for new features and enhancements 
• Design and refine interfaces for AI-powered features, including chatbots and agentic systems 
• Conduct user research and usability testing to validate design decisions 
• Ensure accessibility and usability best practices are applied across all designs 
• Collaborate closely with product managers, business analysts, and engineers to ensure design feasibility and alignment 
• Maintain and evolve design systems, guidelines, and documentation 
• Support Agile delivery by participating in sprint planning, reviews, and design discussions

We are building ChestHunt, a real-world AR treasure hunting mobile game where players explore cities, collect keys, open chests, and earn rewards.

We are looking for a Game Economy Designer to design and balance the full in-game economy and monetization systems.

This is a part-time remote role.
 

Responsibilities

• Design full virtual economy system:

   

  • Keys (gold / silver / sapphire)
  • Chests & rewards
  • Crafting systems
  • Consumable items

   

• Define reward probabilities and drop tables
• Calculate expected value of chests and keys
• Design currency sinks and inflation control
• Balance free-to-play vs paying player experience
• Model monetization loops and retention mechanics
• Build economy simulations (Excel / Google Sheets / Python)
• Optimize progression curve
• Work closely with product & game design team
• Prepare economy documentation and balancing reports

Requirements

• 3+ years experience in game economy / monetization design
• Experience working on F2P mobile games

• Strong understanding of:

   

  • Loot box / gacha mechanics
  • Virtual currencies
  • Player progression systems
  • Retention & monetization loops

   

• Strong analytical & mathematical skills
• Experience building economy simulations

Nice to have

• Experience with AR / location-based games
• Experience with crafting systems
• Experience in social casino / mobile RPG
• Python or advanced Excel skills
• English B2+ would be a plus, but not obligatory

Work format

• Remote
• Flexible schedule

We offer

• Opportunity to design economy from zero
• High ownership & strategic influence
• Long-term collaboration potential
• Startup environment

‼️Important — Overlap 14:00–16:00 Mountain Time (MT)

We are looking for a Middle DevOps Engineer to support and improve the infrastructure of our growing web platform. This role is ideal for someone who is confident with Git, GitHub Actions, Docker, AWS, and Render, and wants to help make deployments, environments, and platform operations more reliable and secure.

Responsibilities

• Maintain and improve deployment pipelines using GitHub Actions
• Support application deployment and hosting in AWS and Render
• Work with developers to improve CI/CD, release flow, and environment stability
• Containerize services and improve local/dev/prod consistency with Docker
• Help manage infrastructure, application configuration, secrets, and environment variables
• Monitor application health, investigate issues, and support incident resolution
• Strengthen reliability, security, and deployment best practices across the platform
• Assist with pre-production / production environment setup and release processes

Requirements

• 3+ years of experience in DevOps / Infrastructure / Platform Engineering
• Good practical knowledge of Git
• Hands-on experience with GitHub Actions
• Solid experience with Docker
• Experience working with AWS
• Experience deploying and maintaining applications on Render
• Understanding of CI/CD, release management, and environment setup
• Ability to troubleshoot deployment, infrastructure, and runtime issues
• Good communication skills and ability to work closely with engineering team members

Nice to have

• Experience with logging, monitoring, and observability tools
• Experience with security best practices, access management, and secrets handling
• Experience supporting Django / Python applications
• Experience with S3, Route53, background workers, or Celery-based systems

Role Summary

We are looking for a Senior ML Engineer who will be responsible for the end-to-end lifecycle of machine learning models, including design, training, evaluation, deployment, and ongoing optimization. In this role, the engineer will work on building and maintaining model ensembles, defining inference logic, establishing retraining workflows, monitoring model performance and drift, and integrating ML solutions into production systems that support real-time decision processes.

The platform follows a hybrid architecture where deterministic rule-based logic is applied first, and more complex scenarios are routed to a machine learning layer for deeper analysis.
 

Key Responsibilities:

• Design, train, fine-tune, and optimize machine learning models used for risk estimation, classification tasks, and automated decision support.
• Develop and maintain ensemble strategies that combine outputs from multiple models, including confidence-based routing and prediction aggregation.
• Build and manage retraining pipelines leveraging synthetic, curated, and eventually production-scale datasets to continuously improve model performance.
• Define evaluation methodologies, performance thresholds, fallback strategies, and human-in-the-loop review triggers for low-confidence predictions.
• Collaborate with backend and product teams to integrate model inference into real-time services and scalable production APIs.
• Improve model reliability, interpretability, and operational performance across early-stage and production workflows.
• Implement monitoring systems to track model drift, prediction quality, system latency, and conditions that trigger retraining.
• Explore and evaluate alternative domain-adapted foundation models when appropriate.
• Ensure traceability and auditability of model predictions while adhering to security, privacy, and deployment standards.
• Contribute to system architecture, MLOps practices, and deployment standards for machine learning solutions in secure cloud or on-premise environments.
   

What We’re Looking For:

• Bachelor’s or Master’s degree in Computer Science, Machine Learning, Artificial Intelligence, Data Science, or a related technical field.
• 5+ years of practical experience building and deploying machine learning solutions in production environments.
• Strong proficiency in Python and experience with modern machine learning frameworks such as PyTorch, TensorFlow, or similar tools.
• Solid understanding of core ML concepts including supervised learning, classification, ranking methods, model calibration, and evaluation techniques.
• Experience adapting and fine-tuning domain-oriented models, as well as working with multi-model or ensemble-based approaches.
• Hands-on experience developing ML pipelines covering training, validation, deployment, and iterative retraining.
• Familiarity with integrating ML systems into API-driven services, as well as working with containers, CI/CD pipelines, and model serving infrastructure.
• Experience with experiment tracking, model version control, and monitoring model performance in production.
• Ability to work effectively with incomplete, evolving, or partially labeled datasets in real-world environments.
   

Nice to Have:

• Experience working with AI systems in regulated or compliance-sensitive environments.
• Familiarity with multilingual machine learning use cases or models designed to support multiple languages.
• Experience applying model explainability techniques, confidence estimation, and human-in-the-loop review workflows.
• Exposure to vector search, semantic retrieval methods, or document understanding pipelines.
• Experience building or operating ML solutions in privacy-sensitive environments with strict data protection requirements.
  
  We offer:
• Flexible working schedule
• Fully remote work
• Compensation for medical, educational and sports activities
• Professional growth opportunities
• Internal knowledge-sharing talks
• Awesome team events and activities
• Paid vacation and sick leave

Are you passionate about building large-scale cloud data infrastructure that makes a real difference? We are looking for a Senior Data Engineer to join our team and work on an impactful healthcare technology project. This role offers a remote work format with the flexibility to collaborate across international teams.

At Sigma Software, we deliver innovative IT solutions to global clients in multiple industries, and we take pride in projects that improve lives. Joining us means working with cutting-edge technologies, contributing to meaningful initiatives, and growing in a supportive environment.

CUSTOMER
Our client is a leading medical technology company. Its portfolio of products, services, and solutions is at the center of clinical decision-making and treatment pathways. Patient-centered innovation has always been, and will always be, at the core of the company. The client is committed to improving patient outcomes and experiences, regardless of where patients live or what they face. The Customer is innovating sustainably to provide healthcare for everyone, everywhere. 

PROJECT
The project focuses on building and maintaining large-scale cloud-based data infrastructure for healthcare applications. It involves designing efficient data pipelines, creating self-service tools, and implementing microservices to simplify complex processes. The work will directly impact how healthcare providers access, process, and analyze critical medical data, ultimately improving patient care.

Responsibilities:

• Collaborate with the Product Owner and team leads to define and design efficient pipelines and data schemas
• Build and maintain infrastructure using Terraform for cloud platforms
• Design and implement large-scale cloud data infrastructure, self-service tooling, and microservices
• Work with large datasets to optimize performance and ensure seamless data integration
• Develop and maintain squad-specific data architectures and pipelines following ETL and Data Lake principles
• Discover, analyze, and organize disparate data sources into clean, understandable schemas

Requirements:

• Possibility to meet clients annually in Europe
• Hands-on experience with cloud computing services in data and analytics
• Experience with data modeling, reporting tools, data governance, and data warehousing
• Proficiency in Python and PySpark for distributed data processing
• Experience with Azure, Snowflake, and Databricks
• Experience with Docker and Kubernetes
• Knowledge of infrastructure as code (Terraform)
• Advanced SQL skills and familiarity with big data databases such as Snowflake, Redshift, etc.
• Experience with stream processing technologies such as Kafka, Spark Structured Streaming
• At least an Upper-Intermediate level of English 

Чи захоплюєтесь ви створенням масштабної хмарної інфраструктури даних, яка має реальний вплив? Ми шукаємо Senior Data Engineer, який приєднається до нашої команди та працюватиме над важливим проєктом у сфері медичних технологій. Ця роль передбачає віддалений формат роботи з можливістю співпрацювати з міжнародними командами.

У Sigma Software ми створюємо інноваційні ІТ-рішення для глобальних клієнтів у різних галузях і пишаємося проєктами, які покращують життя людей. Приєднавшись до нас, ви працюватимете з передовими технологіями, робитимете внесок у значущі ініціативи та розвиватиметеся в підтримуючому середовищі.

Клієнт:
Наш клієнт — провідна компанія у сфері медичних технологій. Її портфель продуктів, сервісів та рішень знаходиться в центрі процесів клінічного прийняття рішень і побудови шляхів лікування. Інновації, орієнтовані на пацієнтів, завжди були і залишаються основою діяльності компанії. Клієнт прагне покращувати результати лікування та досвід пацієнтів незалежно від того, де вони живуть і з якими викликами стикаються. Компанія інноваційно розвивається, щоб забезпечити доступ до медицини для кожного, всюди.

Проєкт:
Проєкт зосереджений на створенні та підтримці масштабної хмарної інфраструктури даних для медичних застосунків. Він включає проєктування ефективних data pipelines, створення self-service інструментів та реалізацію мікросервісів для спрощення складних процесів. Робота безпосередньо впливатиме на те, як медичні установи отримують доступ до критично важливих медичних даних, обробляють їх та аналізують, що зрештою покращує якість медичної допомоги пацієнтам.

 

Обов'язки: 

• Співпрацювати з Product Owner та технічними лідами для визначення та проєктування ефективних pipelines і схем даних
• Будувати та підтримувати інфраструктуру для хмарних платформ за допомогою Terraform
• Проєктувати та впроваджувати масштабну хмарну інфраструктуру даних, self-service інструменти та мікросервіси
• Працювати з великими наборами даних для оптимізації продуктивності та забезпечення безперебійної інтеграції даних
• Розробляти та підтримувати архітектури даних і pipelines для команди відповідно до принципів ETL та Data Lake
• Виявляти, аналізувати та впорядковувати різнорідні джерела даних у зрозумілі та чисті схеми

Вимоги:

• Можливість раз на рік зустрічатися з клієнтами в Європі
• Практичний досвід роботи з хмарними сервісами для даних та аналітики
• Досвід data modeling, reporting tools, data governance та data warehousing
• Впевнене володіння Python і PySpark для розподіленої обробки даних
• Досвід роботи з Azure, Snowflake та Databricks
• Досвід роботи з Docker та Kubernetes
• Знання infrastructure as code (Terraform)
• Просунуті навички SQL та знайомство з big data базами даних, такими як Snowflake, Redshift тощо
• Досвід роботи зі stream processing технологіями, такими як Kafka, Spark Structured Streaming
• Рівень англійської не нижче Upper-Intermediate