Jobs at Djinni

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Senior Java Developer (Technical Consultant) to join our team and help build scalable, high-performance backend systems for fintech, AI, telecommunications, healthcare, and other high-load domains.

This role combines hands-on backend development with participation in architecture design, technical planning, and a consulting-driven approach to building reliable, scalable, and maintainable systems.

Responsibilities

• Design and develop scalable backend services and microservices using Java 17/21, Spring Boot, and Spring Cloud 
• Participate in architecture design, technical planning, and engineering decision-making 
• Build event-driven systems using Kafka or RabbitMQ and develop REST or GraphQL integrations 
• Improve system performance, scalability, reliability, and maintainability 
• Optimize application performance, database interactions, and backend processing flows 
• Collaborate closely with DevOps, QA, product, and engineering teams 
• Participate in code reviews and contribute to engineering best practices 
• Diagnose and resolve issues in production environments 
• Participate in technical discussions with clients and stakeholders when needed 
• Provide technical guidance, architectural recommendations, and mentorship 

Requirements

• Strong commercial experience with Java and Spring Boot/Spring Cloud 
• Strong experience designing and building microservices, REST APIs, and distributed systems 
• Strong understanding of software architecture principles and integration patterns 
• Experience with PostgreSQL or MySQL and Hibernate/JPA 
• Experience with Kafka, RabbitMQ, or other messaging systems 
• Experience optimizing application performance, scalability, and database interactions 
• Experience with Docker and CI/CD pipelines 
• Experience with at least one cloud platform such as AWS, GCP, or Azure 
• Strong debugging, troubleshooting, and problem-solving skills 
• Ownership mindset and responsibility for technical solutions and delivery quality 
• Ability to communicate technical decisions clearly to both technical and non-technical stakeholders 

Nice to Have

• Experience with Redis, Elasticsearch, or GraphQL 
• Knowledge of Kubernetes or Terraform 
• Experience working with high-load systems, caching, and observability tools such as Prometheus, Grafana, or ELK 
• Familiarity with event-driven architecture and asynchronous communication patterns 
• Experience participating in technical consulting, solution design, or system modernization initiatives  

What We Offer

• Work on real-world projects in fintech, AI, telecommunications, healthcare, and other modern domains 
• Opportunity to influence architecture and technical decisions 
• Clear growth path toward Tech Lead or Architect roles 
• Open engineering culture with transparent processes and strong technical collaboration 
• Flexible schedule and fully remote work opportunities

🔍 International Talent Hunter Wanted: Sourcer (Remote) 🚀

Are you an analytical, proactive, and sharp-eyed Sourcer who loves the thrill of the hunt? Do you know how to navigate the international market and crush high-volume searches? If building a powerhouse candidate pipeline is your superpower, we want you on our team!

🎯 Your Daily Goal:

• Deliver 1–2 highly relevant candidates per day.
• Conduct brief, engaging 10–15 minute audio pre-screening interviews with potential matches.

📌 About the Role:

Your main mission will be to build an efficient, data-driven sourcing process, discover top-tier specialists, and fuel a robust candidate pipeline for our recruitment team.

🔥 Key Responsibilities:

• Active Sourcing: Hunt for top talent across LinkedIn, Telegram, job boards, social media, and professional communities.
• Pipeline Management: Build, nurture, and maintain a strong talent pipeline.
• Advanced Sourcing: Utilize Boolean search, X-Ray search, and cutting-edge sourcing tools to find hidden gems.
• First-Class Outreach: Initiate contact and craft compelling, high-converting messages to passive candidates.
• Market Intelligence: Analyze market trends and discover creative new channels for talent acquisition.
• Data & Tracking: Manage candidate databases (ATS/CRM systems) and report on sourcing efficiency.

✅ What You Bring to the Table:

• Experience: 1+ years of proven experience as a Sourcer, Researcher, or Recruiter.
• Tech Savvy: Must have experience sourcing tech/IT professionals.
• Search Mastery: Strong skills in Boolean and X-Ray search.
• Platforms: Deep familiarity with LinkedIn sourcing, Telegram, and standard job boards.
• Communication: Ability to write flawless, catchy outreach messages that candidates actually reply to.
• Soft Skills: High attention to detail, strong communication skills, and the agility to thrive in a fast-paced environment.

🌟 Bonus Points For:

• Experience in international hiring.
• A solid understanding of the IT market and digital landscape.

• Prior experience working with ATS/CRM systems.

  🎁 What’s in It for You?

• Ultimate Flexibility: 100% remote work with a flexible schedule that fits your lifestyle.
• Great Compensation: Competitive salary.
• Growth: Real opportunities for professional development and career advancement within a scaling company.

Data Science UA is a service company with strong data science and AI expertise. Our journey began in 2016 with the uniting top AI talents and organizing the first Data Science tech conference in Kyiv. Over the past 9 years, we have diligently fostered one of the largest Data Science & AI communities in Europe.

About the client:
Our client's platform is designed to work with sales representatives and automate as much of their work as possible, in order to allow them to connect with their clients and make their communications faster. The company also provides intelligence to team managers with performance insights, allowing them to coach their sales reps more effectively.

About the role:
As a Machine Learning Engineer in the Conversational Intelligence Team you will be responsible for building systems that process real-time audio and text streams from Knowledge AI Assistant. You will build scalable machine learning platforms and systems to handle large quantities of data. Engineer low-latency and high-throughput ML systems that must scale for growing business.

Responsibilities:
- Working with voice streams and real-time transcriptions of voice streams to extract intelligence and actionable insights for customers
- Analyzing the relevance of extracted intelligence, performance of the extraction algorithms, and evaluating the performance of third party voice processing APIs
- Finding ways to engineer high availability into a system that has lots of moving parts, not all of which are directly under your control
- Working with stakeholders to make sure our customers have the tools they need to be successful on our platform
- Finding quick ways to prototype and test possible solutions to large problems
- Looking across the stack for the best return on investment for any given pain point.

Requirements:
- 4+ experience in Machine Learning sphere
- 2+ years of experience working with Natural Language Processing.
- Experience with cloud-based data platforms and continuous-deployment projects
- Experience with implementing machine learning pipelines
- Willing to go above and beyond to help other team members
- Ability to prioritize details along a path of iterative delivery
- Ability to quickly ramp up new technologies and start contributing.

Desirable:
- Experience with Go
- Experience building platforms from scratch

We offer:
- Competitive salary and perks; annual satisfaction survey and performance review
- Paid vacation and 100% paid sick leaves
- Work in a creative friendly environment using cutting-edge technologies
- Technical and product leadership opportunities

We’re looking for experienced an Affiliate Manager to join our team! In this role, you’ll be at the heart of our partner program, building relationships and driving success for our affiliates and the company alike.

Are you ready to elevate your career in an innovative and dynamic environment that values growth and collaboration? If you’re eager to make an impact and develop your skills alongside a passionate team, we’d love to hear you! Join us, and let’s take your career to the next level together.

HOW YOU WILL MAKE AN IMPACT

• Develop and present tailored partnership proposals, effectively negotiating terms to build mutually beneficial agreements with new and existing affiliates.
• Guide and support partners through every stage of the partnership, ensuring a seamless experience and fostering strong, long-term relationships.
• Drive retention and motivation among existing partners by creating customized offers for different partner segments, and implementing a loyalty system for high-potential affiliates.
• Monitor and ensure the quality and compliance of affiliate-posted materials, upholding brand standards and message consistency.
• Analyze partner traffic to establish a comprehensive reporting system, leveraging insights to optimize strategy and drive improvements in key performance indicators (KPIs).
• Analyze key performance metrics (ROI, LTV, NGR, GGR, ARPU, ROAS, etc.) and implement strategies to improve their efficiency and overall profitability.
• Increase customer acquisition by driving higher traffic flow from partner sites to our products. Achieve and exceed KPIs related to acquiring new clients and partners, setting the bar for growth and performance.
• Use CRM tools to accurately track, maintain, and manage all partner contacts, ensuring up-to-date records and efficient communication.

WHAT WILL HELP YOU SUCCEED IN THE ROLE

• Minimum of 1,5 years of proven experience in affiliate marketing within the iGaming and Betting industry.
• Upper-intermediate or higher proficiency in English.
• Strong analytical skills to evaluate and optimize traffic funnels, identifying the most effective paths to conversion.
• Proficiency in creating clear and detailed technical tasks for developers and designers.
• Excellent organizational and time management abilities to handle multiple partners and projects effectively.
• Your soft skills, as well as negotiation skills, should be top-notch.
• You are available to travel and attend the conferences.

HOW WE WILL KEEP YOU SMILING

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

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Java Developer to join our backend team and contribute to building scalable, high-performance, and reliable microservices for modern products across fintech, AI, telecom, healthcare, and other high-load domains.

Responsibilities

• Design, develop, and maintain scalable backend microservices and APIs.
• Write clean, efficient, and well-tested code using Java (17/21) and Spring Boot.
• Work with event-driven architectures using tools like Kafka or RabbitMQ.
• Integrate with internal and external REST/GraphQL services.
• Collaborate closely with DevOps, QA, and product teams to deliver high-quality features.
• Participate in code reviews and help establish engineering best practices.
• Optimize backend systems for performance, reliability, and cost efficiency.

• Investigate and resolve production issues, contributing to CI/CD and observability improvements.

   

Requirements

• Strong knowledge of Java and hands-on experience with Spring Boot / Spring Cloud.
• Experience building REST APIs, microservices, and integrations.
• Solid understanding of relational databases (PostgreSQL/MySQL) and ORM frameworks (Hibernate/JPA).
• Familiarity with Docker, containerization, and CI/CD pipelines.
• Knowledge of software architecture principles: microservices, event-driven systems, clean architecture.
• Experience with Git, unit testing (JUnit), and debugging/profiling tools.

• Good problem-solving skills and ability to work in a fast-paced environment.

   

Nice to Have

• Experience with cloud platforms (AWS, GCP, Azure).
• Knowledge of Kafka, Redis, Elasticsearch, or GraphQL.
• Experience with Kubernetes, Helm, or Terraform.
• Understanding of caching strategies, messaging patterns, and high-load system design.
• Experience with performance tuning, monitoring (Prometheus/Grafana), and observability tools (ELK).

• Familiarity with ML/AI integrations or data pipelines.

   

We Offer

• Real-world projects in fintech, AI, telecom, and automation industries.
• Mentorship from senior engineers, tech leads, and architects.
• Personal development plan and a clear path toward Senior Java Engineer or Backend Architect roles.
• Access to internal workshops, best practices, and structured feedback.
• A collaborative engineering culture focused on transparency and continuous improvement.
• Long-term projects, flexible schedule, and a remote-friendly work environment.

Are you ready to rock the IGaming world together?
Grab your opportunity to work with a multi-country product company of ambitious Industry innovators with regional reach and years of successful operation. Join our in-house Acquisitions & Affiliate Marketing team for international Curacao-licensed B2C projects with our software solution.

As an Affiliate Marketing Manager, you will:

• Manage effective revenue growth through affiliate channels, ensure solid support and transparent communication with all affiliates & partners;
• Monitor and analyze affiliate performance based on standards KPIs such as CR, Inst2Reg, Reg2Dep, Click2Reg, Click2DEP;
• Identify and onboard new affiliates to expand the partner network, negotiate terms, and finalize partnership agreements;
• Plan and execute marketing campaigns in collaboration with affiliates to effectively promote brands;
• Manage the affiliate marketing budget efficiently, maximizing ROI and controlling costs;
• Represent the company at iGaming events, and stay updated on industry trends, competitor activity, and market changes.

Requirements:

• 2+ years of experience in Affiliates & online marketing with a strong network of contacts;
• Experience on Tier-1 geos with different sources;
• Solid sales and negotiation skills aimed at tangible results;
• Ability to adapt to new markets quickly, comfortable dealing with fast-paced environments and ambiguity;
• Business proficient English is a must.

What we offer:

• Competitive salary;
• Remote work in a flexible environment;
• 20 working days of paid vacation and education projects;
• Great product with our software solution;
• Opportunity for growth at professional levels way, attending top industry events and conferences, and international workshops at our competence centers.

Don't delay! Send your CV right now and join our highly professional and ambitious team

🚀 About Us

We’re building a next-generation iGaming platform where data drives everything-from player experience to risk management and growth.

We move fast, ship often, and rely heavily on real-time insights, AI, and experimentation. Now we’re looking for a Senior BI Analyst to take our data capabilities to the next level.

💡 The Role

This is a high-ownership, hands-on role where you’ll design and build the entire BI layer of the company.

You won’t just create dashboards-you’ll shape how we understand players, optimize revenue, detect fraud, and scale intelligently.

You’ll work across the stack:

• Data pipelines
• Data models
• Tableau dashboards
• AI-driven insights
• Privacy-first analytics (MPC)

🧠 What You’ll Own📊 Tableau & BI (Your Core Playground)

• Build and scale Tableau dashboards people actually use
• Own everything from data modeling → visualization → performance
• Create dashboards for:
  • Player behavior & retention
  • LTV & segmentation
  • Bonus / promo performance
  • Fraud & risk signals
• Push Tableau to its limits (LOD, APIs, embedded analytics, RLS)

🔗 Data Integration (Messy → Clean → Powerful)

• Bring together data from everywhere:
  • Gaming engines
  • Payments
  • CRM & marketing tools
• Build robust ETL/ELT pipelines
• Create clean, scalable data models that analysts love

🤖 AI-Driven Insights

• Work closely with data science to:
  • Put ML models into production dashboards
  • Surface predictions (churn, LTV, risk)
• Experiment with:
  • Automated insights
  • Natural language querying
  • Real-time anomaly detection

🔐 Privacy & MPC (Where It Gets Interesting)

• Help us implement privacy-first analytics
• Work with Multi-Party Computation (MPC) and secure data sharing
• Enable insights across partners without exposing raw data

🤝 Work Across the Company

• Partner with:
  • Backend engineers (data pipelines, APIs)
  • Frontend/product teams (tracking, features)
  • BI analysts (insights & reporting)
• Turn messy business questions into clean, scalable data solutions

⚙️ Build It Right

• Set standards for:
  • Data quality
  • Dashboard performance
  • BI best practices
• Introduce versioning, testing, CI/CD for BI if it’s missing

🛠️ What You BringMust-Have

• 5+ years in BI / Data / Analytics Engineering
• Deep Tableau expertise (not just charts—architecture & performance)
• Strong SQL + solid data modeling skills
• Experience working with multiple messy data sources
• Python (or similar) for data work
• Experience with cloud data warehouses (Snowflake / BigQuery / Redshift)

Big Bonus Points

• iGaming / betting / high-scale transactional experience
• Experience embedding ML into BI
• Exposure to privacy tech / MPC
• Familiarity with modern data stack (dbt, Airflow, etc.)
• Real-time data experience

🧠 How You Work

• You take ownership-no waiting for perfect specs
• You care about impact, not just output
• You can talk to engineers and business stakeholders
• You simplify complexity and make data usable

🎯 What You’ll Impact

• Faster, better decisions across the company
• Improved player retention & revenue
• Smarter fraud detection
• A BI stack that actually scales

🎁 What You Get

• Real ownership (you’ll shape the BI function)
• Work on AI + modern data stack + privacy tech
• Fast-moving, no-bureaucracy environment
• Competitive salary + flexibility

🎲 Why This Role is Different

Most BI roles stop at dashboards.

This one doesn’t.

You’ll be building a modern data brain for the company-combining:

• BI
• Data engineering
• AI
• Privacy-first analytics

We are looking for a Clinical LLM Engineer to work on real-world healthcare challenges, building LLM-powered solutions for clinical data extraction.

The platform is scaling across the US healthcare system, focusing on practical impact and improving care through better use of clinical data.

You will fully own prompt engineering and extraction quality, working directly with LLM APIs, while a separate team handles backend and infrastructure. Your focus will be on improving accuracy, system reliability, and adapting workflows as LLM capabilities evolve.

We offer:

• Flexible working hours;
• Paid vacation and sick leave;
• Health insurance;
• Professional growth opportunities;
• Internal English classes & compensation for courses;
• Legal and accounting support.
   

Requirements:

• 3+ years of Python development experience (data processing, scripting, automation);
• Hands-on experience with prompt engineering for LLMs in production;
• Experience working with US healthcare or clinical data;
• Strong understanding of unstructured data (text, PDFs, scanned documents);
• Experience with document classification or similar tasks;
• Experience with evaluation frameworks for LLM performance;
• Basic experience with cloud environments (AWS Lambda, EC2, simple pipelines);
• Experience with Git (GitHub);
• Understanding of Agile development practices;
• High English level.
   

Responsibilities

• Design and optimize prompts for accurate clinical data extraction;
• Adapt prompt strategies to handle real-world variability in medical documents;
• Build document classification workflows (labs, imaging, vaccines, etc.);
• Develop Python pipelines for LLM interaction and data processing;
• Evaluate and improve extraction quality across document types;
• Continuously adapt prompting approaches as LLM capabilities evolve.

Looking for a highly skilled Quality Assurance (QA) Engineer to join our dynamic team. This role requires proven experience testing features from conception to production and experience working with automation frameworks, for example Playwright, to ensure the overall quality of our product.

About the Project

A US-based fintech/edtech product used by thousands of educational organizations. The platform replaces paperwork and manual processes, making financial flows transparent and efficient.
The product has scaled from schools to districts and state-level implementations.
The team has been working on the project for 7+ years — stable product, mature codebase, strong engineering culture.

We are looking for someone who thinks in systems, understands business value, and takes ownership of delivery.

Key Responsibilities

• Experience in manual testing from 3+years
• Perform comprehensive QA testing of new features. 
• Collaborate closely with Developers, Product Owners, and the wider QA team to see features through the entire software development lifecycle. 
• Experience designing, implementing, and executing automated tests using an automation framework (for example Playwright) to ensure high-quality software releases. 
• Create and manage detailed test cases and test plans. 
• Execute API testing to validate service layer functionality. 

Required Technical Skills

• Proven experience working with automation frameworks, for example Playwright. 
• JavaScript / TypeScript.
• Git.
• CI/CD (Continuous Integration/Continuous Delivery) familiarity.
• Strong knowledge of API testing. 
• End-to-End Testing.
• Test Case creation and management.

What you’ll get:

• Flat hierarchies and short decision paths, openness to new ideas.
• Flexible working schedule.
• Reimbursement for professional certification.
• Annual paid vacation — 18 working days.
• Paid sick leave — 10 working days.
• English classes.
• IT club card — applicable for Lviv region.
• Sport classes compensation.
• Comfortable office locations or remote work.

PwC is a global network of more than 370,000 professionals in 149 countries that turns challenges into opportunities. We create innovative solutions in audit, consulting, tax and technology, combining knowledge from all over the world.

PwC SDC Lviv, opened in 2018, is part of this global space. It is a place where technology is combined with team spirit, and ambitious ideas find their embodiment in real projects for Central and Eastern Europe.

What do we guarantee?

• Work format: Remote or in a comfortable office in Lviv — you choose.
• Development: Personal development plan, mentoring, English and Polish language courses.
• Stability: Official employment from day one, annual review of salary and career prospects.
• Corporate culture: Events that unite the team and a space where everyone can be themselves.

Join PwC Slovakia as a AI Engineer, where you’ll have the opportunity to grow your skills and contribute to AI and data science solutions for leading global clients. This role is designed for middle-level specialists and above (3+ years of experience) who can independently contribute to projects and deliver results, who want to build, integrate, and deploy machine learning systems and data-driven applications. We are looking for candidates who enjoy coding in Python, working with data, and turning ideas into reliable, scalable solutions.

Project you could be involved in:

• Natural Language Data Exploration: Develop dashboards powered by AI for intuitive business data analysis.
• Document Interaction: Design tools enabling seamless interaction with unstructured and structured text documents.
• Knowledge Assistant: Implement ERP transformation with AI-powered tools to resolve employee inquiries efficiently.
• Agricultural Monitoring: Utilize Computer Vision for analyzing satellite imagery on a large scale.
• Automated Reconciliation: Create systems to identify anomalous transactions in accounting ledgers.

What You’ll Do:

• Project Participation: Participate in AI and data science projects from conception to deployment, contributing to solution design and supporting timely delivery of assigned tasks.
• Solution Development: Support the development of AI and ML solutions with a strong focus on Python-based implementation, working across areas such as Large Language Models (LLMs), RAG, classical machine learning and data analysis.
• Learning & Development: Continuously develop technical skills by following AI and data science trends, learning new approaches, and contributing to improvements of existing solutions and processes.

What We’re Looking For:

• Programming Skills (Key Requirement): Solid programming skills in Python (e.g. pandas, numpy, scikit-learn, plotly). Ability to write and understand code is essential. Experience with other programming languages is a plus.
• AI/ML Background: Hands‑on academic, project, or entry‑level experience with machine learning, data science, NLP, Computer Vision, or Generative AI (LLMs, RAG). The focus is on building or implementing solutions, not only using AI tools. Strong foundations in statistics and ML fundamentals are valued.
• Databases: Basic experience with SQL databases; familiarity with NoSQL databases is an advantage.
• Analytical Thinking: Strong analytical mindset with the ability to approach problems logically and creatively.
• Independence & Responsibility: Ability to work independently on assigned tasks and deliver results with guidance when needed.
• Language Skills: Fluent in English (B2 level or higher).

Policy statements:
www.pwc.com/ua/uk/about/privacy.html

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability
 

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability

About us:

Atto Trading, a dynamic quantitative trading firm founded in 2010 and leading in global high-frequency strategies.
We are expanding an international, diverse team with experts in trading, statistics, engineering, and technology. Our disciplined approach, combined with rapid market feedback, allows us to quickly turn ideas into profit. Our environment of learning and collaboration allows us to solve some of the world’s hardest problems, together. As a small firm, we remain nimble and hold ourselves to the highest standards of integrity, ingenuity, and effort. 

Role Highlights: 

We’re looking for a Talent Sourcer / Recruiter to help identify and engage exceptional technical and quantitative talent. You will support sourcing, outreach, and interview coordination while learning to operate in a fast-paced, high-standard environment. 
This role is ideal for someone ambitious, detail-oriented, and motivated by performance and impact.

Please note: This role requires in-office presence in one of our locations - Kyiv, Ukraine or Lisbon, Portugal.

Responsibilities: 

• Build and maintain candidate pipelines for highly selective technical roles (quant research, software engineering, trading operations, infrastructure) to support current and future hiring needs.
• Proactively source, identify, research, and engage active and passive candidates via LinkedIn, GitHub, Djinni, job boards, referrals, and niche communities (quant, code/dev, competitive programming), leveraging creative sourcing strategies (Boolean search, social networks, community channels).
• Identify and shortlist relevant profiles based on experience, achievements, tech stack, and location.
• Conduct initial screening, including resume evaluation against role requirements.
• Run outreach campaigns and manage candidate engagement, including personalized messaging, follow-ups, screening requests, and pipeline nurturing.
• Partner with senior recruiters and hiring managers to support the full recruitment cycle, including interview coordination, scheduling, and calendar management.
• Maintain and update the ATS, ensure accurate daily candidate status tracking, and support overall pipeline hygiene.
• Support market and talent research (hiring trends, layoffs, competitors, new sourcing channels).

Requirements:

• Bachelor’s Degree.
• Upper-Intermediate or higher level of English.
• 2+ years of experience in technical recruitment, talent sourcing, or recruitment coordination in a fast-paced environment (software, fintech, gamedev or similar).
• Experience sourcing/recruiting in the US market.
• Proactive sourcing skills (LinkedIn Recruiter, Boolean search).
• Proficiency with modern recruiting tools (including LLM-based tools).
• Experience with ATS (Greenhouse, Lever, or similar) is highly beneficial.
• Strong communication and negotiation skills.
• Ability to work independently, proactively in a fast-paced, high-performance environment with high-quality standards.
• Strong organizational skills, attention to detail.
• Ownership mindset.
• Interest in the trading domain will be a plus.

What We Offer:

• Competitive compensation package
• Performance-based bonus opportunities
• Paid time off (25 days)
• Healthcare and sports/gym budget
• Mental health support, including access to therapy
• Relocation support (where applicable)
• Learning and development support, including courses and certifications
• Clear growth opportunities within the recruitment team
• Access to professional tools, software, and resources
• Fully equipped workstations with high-quality hardware
• Modern office with paid lunches
• International team meet-ups

Our motivation:

We are a company committed to staying at the forefront of technology. Our team is passionate about continual learning and improvement. With no external investors or customers, we are the primary users of the products we create, allowing you to make a real impact on our company's growth.

Ready to advance your career? Join our innovative team and help shape the future of trading on a global scale. Apply now and let's create the future together!

We are hosting the largest public online catalog of chemical compounds — over 11 billion compounds from suppliers from all over the world — and provide the researchers and procurement professionals with ultra-fast chemical and text searches for the best exploring and purchasing experience.

We combine expertise in chemical sourcing and procurement with one in building integration solutions for smooth and seamless ordering process. One of our main focuses now is building B2B products to cooperate with various Pharma companies.

We are opening a Product Owner position aiming to expand our business in SaaS model.

IN THIS ROLE YOU WILL:

1. Develop Product Vision:
   
    
   1. Engage closely with customers to define and continually refine the product vision, ensuring alignment with market needs and business objectives
   2. Translate customer needs into detailed product requirements
2. Manage Product Backlog:
   
    
   1. Create and maintain a comprehensive product backlog
   2. Prioritize backlog items based on value and strategic goals
   3. Facilitate backlog grooming sessions and ensure that the backlog is organized and actionable for the development team
3. Ensure Project Success:
   
    
   1. Coordinate project timelines and deliverables with customers.
   2. Monitor progress to ensure alignment with project goals and customer’s expectations
   3. Implement best practices to manage risks and ensure that project deliverables meet quality standards and customer satisfaction
4. Facilitate Communication:
   
    
   1. Serve as the main point of contact for product and project updates
   2. Keep stakeholders informed and engaged throughout the project lifecycle

WE ARE LOOKING FOR SOMEONE WHO HAS:

• Experience & Expertise:
• 3+ years in a similar role (Business Analyst/Product Owner)
• Experience with Jira Software
• Strong understanding of Agile methodology
• Skills & Proficiencies:
• Upper-intermediate English proficiency, with strong communication and writing skills in both Ukrainian and English
• Analytical mindset with the ability to understand and address complex business processes
• High attention to detail and strong responsibility
• Personal Attributes:
• A strong sense of ownership and pride in product development
• Capability to adjust to changing priorities and new challenges

WE OFFER:

• Competitive compensation depending on the experience and skills
• Flexible working hours
• Interesting business domain
• Comprehensive benefits package including sick leaves, annual vacation, medical insurance and sport compensations
• English language courses
• Individual annual budget on education
• Friendly working environment