Jobs

Lead Backend Developer (Node.js / Microservices) — iGaming / Casino

We're looking for a senior backend engineer who thrives in high-load, real-time environments. We operate in the online casino and iGaming industry — if you have experience in this space, you're already a step ahead. This is a hands-on leadership role for someone who has built and scaled production systems — and knows how to keep them running under pressure.

Key Responsibilities

▸ Design, build, and maintain scalable backend services and REST APIs ▸ Lead architecture decisions across distributed microservices systems ▸ Own real-time communication infrastructure (WebSockets, NATS, Kafka) 

▸ Ensure system reliability, observability, and fault tolerance at scale 

▸ Optimize database performance and handle high-volume data challenges 

▸ Set technical standards and mentor the engineering team ▸ Debug and resolve production issues under pressure

Required Technical Experience

Backend 

✔ 5+ years of professional backend development 

✔ Strong expertise in Node.js, TypeScript, JavaScript (ES6+) 

✔ Experience building scalable REST APIs and real-time services 

✔ Deep understanding of async programming and event-driven architectures

Microservices 

✔ Proven experience designing distributed microservices environments 

✔ Service communication patterns, fault tolerance, horizontal scaling 

✔ Observability, monitoring, and high-traffic production systems

Messaging & Streaming — all three are mandatory 

✔ NATS 

✔ Apache Kafka 

✔ WebSockets / real-time communication systems

Must understand: Pub/Sub, streaming pipelines, message durability, consumer groups, event orchestration, reconnection strategies, real-time sync

DevOps & Infrastructure — mandatory 

✔ Kubernetes (K8s) and Docker 

✔ CI/CD pipelines and containerized production environments

Strong advantage: DigitalOcean Kubernetes (DOKS), Helm, Ingress management, Cloudflare, Linux server administration

Databases 

✔ MySQL and PostgreSQL — production experience 

✔ Query optimization, indexing, partitioning, caching strategies 

✔ Redis and experience with large datasets and performance bottlenecks

Frontend — advantage React, Next.js, Material UI, real-time frontend integrations

Additional Requirements

✔ Experience on high-scale platforms with significant live traffic 

✔ Strong architectural thinking and problem-solving skills 

✔ Experience in real-time gaming, fintech, sportsbook, casino, or similar high-load environments — major advantage 

✔ Strong understanding of security, scalability, and system reliability 

✔ Experience in agile, fast-moving development teams

Compensation

💰 Fixed salary — discussed individually 🌍 Fully remote 🎰 Industry: online casino / iGaming

👉 We're looking for someone who has been there — built it, scaled it, and kept it running in a high-stakes, high-traffic environment. If that's you, we want to talk.

We are seeking a highly motivated and technically proficient QA Hybrid Test Engineer to join our dedicated testing team. You will play a crucial role in ensuring the successful and high-quality delivery of software products for our client, a prominent American automaker.
This position offers a challenging and dynamic environment within a multicultural international team, demanding strong problem-solving skills and a proactive approach.

• Responsibilities:

  Design, develop, and execute robust automated test scenarios on a daily basis, utilizing Python as the primary scripting language.
  Framework Management: Actively contribute to a new and maintain the existing automation frameworks
  Ensure comprehensive test coverage by writing detailed test scenarios
  Engage in specialized testing of automotive systems, including validation of in-vehicle components
  Work closely with developers, business analysts, and product owners within the Scrum framework, actively participating in sprint planning and daily stand-ups.

• Mandatory Skills Description:

  Prior work with embedded or automotive systems, especially in the context of multi-ECU scenarios.
  Proven experience developing, debugging, and maintaining Python code for automated testing.
  Thoroughly analyze logs, and quickly resolve issues within automated testing pipelines.
  Experience managing Python virtual environments and dependencies.
  Experience with Git for version control and JFrog Artifactory
  Ability to read and follow technical documentation in English.
  Strong communication skills for collaboration with developers, testers.

• Nice-to-Have Skills Description:

  Experience with test automation for automotive multimedia, connectivity, and driver-assistance features.
  Hands-on expertise with modern test automation frameworks, especially those supporting Behavior-Driven Development (BDD) and keyword-driven testing.
  Skilled in translating requirements and Gherkin scenarios into robust, executable automation logic.
  Ability to analyze, optimize, and troubleshoot both hand-written and AI-generated Python test scripts for reliability and maintainability.
  Experience integrating automated tests with Hardware-in-the-Loop (HiL) and Software-in-the-Loop (SIL) benches via industry-standard APIs (such as ASAM HIL).
  Hands on experience with testing of ADAS features such as Camera, Parking Assist, and Driving Assistance modules.
  Experience with requirements gap analysis, traceability, and coverage reporting for ADAS or other safety-critical automotive systems.
  Exposure to automotive communication protocols (e.g., CAN, LIN, Ethernet).

Linux Administrator — HPC & Infrastructure
 

We are looking for a Linux Administrator to support high-performance computing environments and critical distributed infrastructure.
 

In this role, you will:

• Administer HPC clusters for machine learning workloads (e.g., Slurm, Ceph)
• Maintain and support application infrastructure (web services, ERP systems, mail, LDAP, messaging services, etc.)
• Manage and automate workstation provisioning using Ansible
• Ensure stability, performance, and security of distributed systems
   

Requirements:

• Strong experience in Linux system administration (Ubuntu/Debian preferred)
• Experience with HPC environments and job schedulers (e.g., Slurm)
• Knowledge of distributed storage systems (e.g., Ceph or similar)
• Experience with infrastructure automation tools (e.g., Ansible)
• Solid understanding of networking fundamentals and security best practices
   

Nice to have:

• Experience with Python, C++, Rust, or CUDA
• Familiarity with low-level Linux systems or kernel concepts
• Experience with web or backend systems
   

What we offer:
Work on cutting-edge autonomous driving tech, flexible hours, fast-paced engineering environment, competitive salary, and stock options.

We are the creators of a new fintech era!
Our mission is to revolutionize the world by making blockchain technology accessible to everyone in everyday life. WhiteBIT is a global team of more than 1,200 professionals united by a shared vision of shaping the Web3 future.
We are building our own blockchain ecosystem, ensuring maximum transparency and security for over 8 million users worldwide. Our cutting-edge solutions, rapid adaptation to market challenges, and technological excellence set us apart from traditional companies.
Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT, and VISA.

The future of Web3 starts with you — join us as a CPA Account Manager!

Requirements:

Experience & language:
- 2+ years of experience in similar roles (in-app traffic management, mobile performance marketing, UA, affiliate/in-app partner management).
- English level B2 or higher — for communication with partners, reporting, and negotiations.

In-app traffic & advertising cycle:
- Understanding of in-app traffic.
- Understanding of the full cycle of in-app advertising: from media buying to post-install events.
- Knowledge of main in-app traffic sources: SDK networks, DSPs, arbitrage teams, media buying agencies, in-app publishers.

Analytics & traffic quality evaluation:
- Ability to analyze and evaluate traffic quality using key metrics: CTR, CR, Retention, ROMI, LTV, fraud indicators.
- Experience with mobile attribution.
- Confident use of Adjust and AppsFlyer.

Attribution mechanics:
- Understanding of IDFA/GAID, SKAdNetwork, fingerprinting, probabilistic matching.
- Anti-fraud skills.
- Ability to analyze fraud metrics: click spamming, click injection, bot traffic, anomalous behavior.
- Experience working with MMP anti-fraud dashboards (Protect360, Adjust Fraud Suite).
- Ability to run weekly/monthly reconciliations, request partner reports, and compare MMP data with partner reporting.

Partner acquisition & onboarding:
- Skills in sourcing new in-app traffic providers: publishers, networks, arbitrage teams, thematic communities, partner catalogs.
- Ability to conduct initial partner checks: cases, volumes, GEOs, quality, tracking setup.
- Negotiation skills: terms, KPIs, test volumes, payment format (CPA/RevShare).
- Understanding of technical requirements for partners (MMP setup, postbacks, event mapping).

Contacts & market knowledge:
- Existing network of partners or personal contacts among in-app traffic suppliers is a strong advantage.
- Understanding of the market: GEO coverage and formats of different networks/publishers, specifics of individual suppliers.

Data work:
- Strong Excel/Google Sheets skills: pivot tables, working with large datasets.
- Ability to interpret data and draw actionable conclusions.

Responsibilities:

Analytics & tracking:
- Create tracking links and postbacks.
- Analyze installs, events, cohorts, and advertising channels.
- Monitor metric deviations and identify root causes.

Attribution & anti-fraud:
- Apply knowledge of attribution mechanics (IDFA/GAID, SKAdNetwork, fingerprinting, probabilistic matching).
- Analyze fraud metrics: click spamming, click injection, bot traffic, anomalous behavior.
- Work with MMP anti-fraud dashboards (Protect360, Adjust Fraud Suite).
- Run weekly/monthly reconciliations, request and verify partner reports, compare MMP data with partner reporting.

Partner management:
- Search for and onboard new partners: publishers, SDK networks, DSPs, media buying agencies, arbitrage teams.
- Perform initial partner validation (cases, volumes, GEOs, quality, tracking).
- Negotiate terms, KPIs, test volumes, payment structures.
- Ensure correct setup for partners: MMP integration, postbacks, event mapping.

Data & reporting:
- Work confidently with large datasets in Excel/Google Sheets.
- Interpret data and prepare insights for optimization and decision-making.

Working conditions:
 

Immerse yourself in Crypto & Web3:
- Master cutting-edge technologies and become an expert in the most innovative industry.
Work with the Fintech of the Future:
- Develop your skills in digital finance and shape the global market.
Take Your Professionalism to the Next Level:
- Gain unique experience and be part of global transformations.
Drive Innovations:
- Influence the industry and contribute to groundbreaking solutions.
Join a Strong Team:
- Collaborate with top experts worldwide and grow alongside the best.

Work-Life Balance & Well-being:
- Modern equipment.
- Comfortable working conditions, and an inspiring environment to help you thrive.
- 24 calendar days of paid leave.
- Additional days off for national holidays.

With us, you’ll dive into the world of unique blockchain technologies, reshape the crypto landscape, and become an innovator in your field. If you’re ready to take on challenges and join our dynamic team, apply now and start a new chapter in your career!
Let’s Build the Future Together!

We’re looking for a Senior AI Engineer with hands-on experience in building LLM-powered applications, RAG systems and agent-based workflows, operating such systems in production

This role is for someone who can independently take a business problem, design an AI-driven solution, and ship it into production

What You’ll Do

• Design and build LLM-powered applications and AI-driven product features end-to-end
• Develop and maintain RAG pipelines, vector search systems, and knowledge bases
• Build AI Agents and multi-agent workflows for complex task execution
• Architect prompt systems and interaction logic that are stable and predictable in production
• Integrate AI systems with external platforms and internal product surfaces via APIs
• Deploy and operate AI solutions in production environments 
• Work directly with stakeholders to translate business needs into technical AI solutions

Requirements

• 2+ years of experience building LLM-powered applications and AI systems
• Strong Python skills and solid software engineering fundamentals
• Hands-on experience with major LLMs: OpenAI, Anthropic Claude, Gemini
• Proven experience building RAG systems (LangChain, LlamaIndex, LangGraph)
• Knowledge of vector databases (Pinecone, Weaviate, Chroma, pgvector)
• Experience with AI Agents and agentic workflow architecture
• FastAPI or similar Python backend experience
• Experience deploying and operating AI systems in production
• Ability to work autonomously from task clarification to production deployment
• English level B2+

Would Be a Plus

• Google Cloud Platform / Vertex AI experience
• Experience with workflow automation tools (n8n, Make, Zapier)
• Experience building AI chatbots and Telegram bots
• Familiarity with Model Context Protocol (MCP)
• Experience with document processing and extraction systems

Why Join Us

• Build production-grade AI systems for real users, not just prototypes
• Work across the full AI stack - from prompt architecture to deployed pipelines
• Deliver solutions for international clients across the US, Canada, and UK
• Flexible remote work format approved by PM
• 20 paid vacation days and 5 paid sick days for full-time position

We hire for an engineering mindset and ownership. If you’re ready to go beyond demos and build best-in-class AI systems in production - we’d love to hear from you

Summary

Who we are
A performance marketing agency that operates as an embedded growth team for our clients. We manage 5+ active accounts across DTC e-commerce, mobile apps (iOS/Android), and lead generation verticals with a combined monthly spend of $200k+. Our primary platform is Meta, with TikTok and Google Ads for select accounts.
We’re a small, senior team - no layers, no bureaucracy. You’ll work directly with the founder (strategy), a creative lead (production), and a PM (coordination). Decisions happen fast, and you’ll have real ownership over the numbers.

The role
You’ll own the full performance lifecycle across multiple accounts - from campaign architecture and bid strategy to creative testing orchestration, anomaly response, and weekly client reporting.
You’ll think in unit economics (CAC, payback period, LTV), plan 1-3 months ahead, and work closely with our creative lead to turn performance data into actionable briefs. When ROAS drops 30% on a Tuesday morning, you’re the one who diagnoses whether it’s creative fatigue, audience saturation, or a platform delivery bug - and you fix it before anyone needs to ask.

What you’ll own

P&L outcomes
Hit and scale ROAS/MER targets per client while holding CAC and payback period within agreed thresholds
Manage daily budgets and pacing across multiple ad accounts per client
Own scaling decisions: when to push, when to pull back, how to manage learning phases

Strategic planning
Rolling 1-3 month media plans: angles, offers, campaign structure, budget allocation
Test roadmaps: creatives, audiences, placements, bid strategies - planned and executed weekly
Map full funnel TOF/MOF/BOF and ensure message match from ads through LP/PDP/app store to email/SMS

Creative analysis and guidance
Analyze creative performance using hook rate, hold rate, CTR, CVR, CPA, and ROAS to identify winners, fatiguing assets, and patterns worth iterating on
Translate data into specific, actionable briefs for the creative team: what formats to build (video, static, carousel, UGC), what angles to test, what volumes are needed, and what the priority order is
Define test mix and cadence - you decide what gets launched, how much budget it gets, and when to kill or scale
QA all creatives before launch: copy accuracy, size compliance, ad platform policy, landing page alignment

Tracking and measurement
Implement and maintain tracking: Pixel, CAPI, AEM, UTMs, GA4/GTM
For mobile app clients: configure and verify MMP (Mobile Measurement Partner) attribution, set up in-app event tracking, manage postback configurations, and ensure accurate install/purchase/subscription attribution across iOS and Android
Diagnose discrepancies between ad platform reporting, MMP data, and backend numbers
Maintain clean attribution across web and app funnels

Optimization and troubleshooting
Prevent creative fatigue through proactive refresh cycles
Manage bid strategy transitions and campaign structure decisions (ASC/ABO/CBO mix, Cost Cap vs Bid Cap)
Diagnose delivery issues, attribution discrepancies, and platform anomalies
Coordinate CRO and landing page fixes when data points to post-click problems
Define stop-loss thresholds and enforce them

Reporting and visibility
Weekly client reports: campaign-level breakdowns with strategic commentary, trends, risks, forecast, and next steps
Surface risks early - don’t wait for the weekly report to flag a problem
Maintain dashboards and ensure stakeholders have clear visibility into performance
Enforce Meta policy and FTC/ASA compliance across all ad content

KPIs
MER/ROAS per client
CAC and payback period
Creative hit rate and time-to-winner
Budget pacing accuracy
Report quality and on-time delivery
On-schedule test execution (planned vs launched)

Requirements

Must have
4-6+ years of hands-on Meta Ads buying with proven profitable scale at $200k+/month combined spend
Fluent in unit economics and forecasting: CAC, LTV, payback period, MER, contribution margin
Strong attribution knowledge: CAPI, AEM, GA4/GTM, MMP setup and troubleshooting
Proven ability to analyze creative performance data and turn it into actionable briefs and testing plans for the creative team
Experience with both DTC/e-commerce and mobile app campaigns (including app install and in-app event optimization)
Excellent English - you’ll write client-facing reports and communicate async in Slack
Self-directed, proactive, ownership mindset

Strong plus
TikTok Ads and/or Google Ads buying experience
Multi-language campaign management (English, Spanish, French)
Shopify/Replo/Webflow CRO knowledge
Multi-country buying experience
Triple Whale, Hyros, Northbeam, Adjust, or similar attribution platforms

What we offer
Performance-based compensation: base retainer + upside tied to ROI/MER performance
In-house creative team and testing budgets
Standardized ops: weekly report templates, creative brief system, structured testing frameworks
Remote, async-first, high-autonomy environment
Small team with direct access to decision-makers - no red tape

Additional questions:
1. Your best Meta Ads case study - what you managed, what decisions you made, what results you drove
2. A specific example of how you turned performance data into a creative brief that improved results
3. Your experience with mobile app campaigns (if any)
4. Your availability and compensation expectations

Full-time · Remote · Product Company

We’re helping our partner, product company building subscription-based digital products, hire a Performance marketing manager to take ownership of paid acquisition across Meta and Google.

Platform to create, edit and ship production ready visuals with AI - Pixa

The team is scaling user acquisition and looking for someone who can step in, audit the current setup, improve performance, and build a more scalable testing system for campaigns, creatives, and audiences.

This role is best suited for a strong senior specialist who is comfortable working with large budgets, understands mobile attribution, and can independently manage performance campaigns end-to-end.

You will work closely with the Head of Growth and collaborate with the creative team to continuously improve performance and unlock new growth opportunities.

What You’ll Do

Campaign Ownership

• Manage and optimize paid acquisition campaigns across Meta and Google
• Work with budgets exceeding $500k+ monthly spend
• Audit and restructure existing campaign setups
• Improve CPA / ROAS efficiency
• Identify new growth opportunities within existing channels

Testing & Experimentation

• Build and maintain a scalable creative and audience testing framework
• Launch and iterate experiments on a weekly basis
• Increase creative testing velocity and iteration speed
• Work closely with the creative team to develop new concepts

Performance Analysis

• Monitor campaign pacing and performance daily
• Analyze trends and identify performance drivers
• Build clear reporting and decision cadence
• Focus on real acquisition metrics rather than vanity metrics

Your core focus will be execution, experimentation, and performance optimization.

What We’re Looking For

• 3–5 years of hands-on paid media experience
• Strong experience with Meta Ads and Google Ads
• Experience managing $500k+ monthly budgets
• Background in direct-response campaigns
• Experience working with mobile attribution tools (Appsflyer or other MMP)
• Understanding of full-funnel conversion math
• Experience working with subscription-based digital products
• Strong knowledge of creative testing frameworks
• Ability to analyze data quickly and iterate campaigns
• Strong English communication skills

Nice to Have

• SQL or data analysis experience
• Experience with Meta influencer partnerships

How the Team Works

• Report directly to the Head of Growth
• Collaborate with the Head of Creative Strategy
• Work with external creative contractors
• Fast experimentation environment with quick decision cycles

Required timezone overlap: half-day with NYC

What’s Offered

• Fully remote
• Flexible working hours (half-day overlap with NYC)
• 3 weeks vacation + holidays
• High ownership and direct impact on growth metrics
• Opportunity to expand ownership over paid acquisition channels

Important: after confirming your application on this platform, you’ll receive an email with the next step: completing your application on our internal site, LaunchPod. So keep an eye on your inbox and don’t miss this step — without it, the process can’t move forward.

Why join us
If you’re looking for a place to grow, make an impact, and work with people who care, we’d love to meet you! :)

About the role
We are looking for a Senior Backend Engineer to design and maintain scalable, secure backend systems that power a high-scale consumer dating platform. You will work with Kotlin and AWS-native services, owning projects end-to-end from architecture to production delivery. The role includes mentoring junior engineers and contributing to technical standards, with AI-assisted development tools integrated into the engineering workflow.

What you will do
● Design, implement, and maintain backend systems that are scalable, secure, and reliable, using AWS-native services;
● Drive individual projects from inception to delivery, owning the full software development lifecycle;
● Collaborate with Product Managers, Designers, and other Engineers to ship new features and improvements;
● Apply AI-based development tools and workflows to enhance productivity and code quality;
● Participate in architecture discussions and propose technical solutions that support long-term scalability;
● Support junior engineers through pairing, mentoring, and code reviews;
● Contribute to engineering standards and best practices to maintain a high-quality codebase.

Must haves
● 5+ years of professional experience in backend Kotlin software engineering;
● 2+ years working with cloud environments, preferably AWS, including deployment and monitoring;
● Proven experience using AI-powered development tools (e.g., Cursor, Claude, ChatGPT) as part of day-to-day engineering workflows, along with hands-on experience integrating and supporting AI/LLM-powered features or services in production systems;
● Proven ability to run projects autonomously and deliver production-ready systems;
● Exposure to secure API design, distributed systems, and microservices architecture;
● Experience with CI/CD pipelines and containerization tools like Docker or Kubernetes;
● Familiarity with infrastructure-as-code tools such as Terraform and observability platforms such as Datadog, Prometheus;
● Excellent communication skills and a collaborative, inclusive mindset;
● Upper-intermediate English level.

Perks and benefits
● Professional growth: Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps
● Competitive compensation: We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities
● A selection of exciting projects: Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands
● Flextime: Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office — whatever makes you the happiest and most productive.

Meet Our Recruitment Process
Asynchronous stage — An automated, self-paced track that helps us move faster and give you quicker feedback:
● Short online form to confirm basic requirements
● 30–60 minute skills assessment
● 5-minute introduction video
Synchronous stage — Live interviews
● Technical interview with our engineering team (scheduled at your convenience)
● Final interview with your future teammates
If it’s a match—you’ll get an offer!

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

Our client transform back-of-house tech for the hospitality industry, replacing outdated processes with AI-driven solutions. This helps top hotel brands focus on delivering exceptional guest experiences while ensuring efficient operations.

Key Requirements:

🔹 6+ years of full stack engineering experience;
🔹 Advanced proficiency in .NET (C#) (5+ years) and at least 1 year of commercial experience with Node.js;
🔹 Advanced proficiency in React and TypeScript;
🔹 Proficiency in leveraging AI tools to enhance engineering productivity, with specific hands-on experience using Claude Code;
🔹 Experience working with high-scale and distributed systems;
🔹 Hands-on experience with SQL Server, PostgreSQL, MongoDB, or Redis;
🔹 Familiarity with frameworks like Express, NestJS, or ASP.NET Core;
🔹 Solid understanding of system architecture, automated testing, and security best practices;
🔹 Experience with Docker, CI/CD pipelines, and cloud platforms (AWS, GCP, or Azure);
🔹 Excellent communication and problem-solving skills; comfortable working in cross-functional teams;
🔹 Willingness to work in a role split approximately 60% backend and 40% frontend, with around 70% focused on new feature development and 30% on maintenance/bug fixes, including participation in on-call duties after the onboarding period.
🔹 English - Upper-Intermediate or higher.


Will be plus:

🔹 Experience with microservices architecture, GraphQL, or serverless functions;
🔹 Exposure to mobile development (especially React Native) or AI -based features;
🔹 Familiarity with DevOps practices and infrastructure-as-code (e.g., Terraform, Pulumi);
🔹 Domain experience in hospitality, logistics, or supply chain tech;

What you will do:

🔹 Design, develop, and ship end-to-end features using React, Node.js, TypeScript, and .NET (C#);
🔹 Build and optimize scalable APIs and backend services using SQL and NoSQL databases;
🔹 Own technical decisions around performance, security, maintainability, and code quality;
🔹 Collaborate closely with product managers, designers, and other engineers to deliver impactful features;
🔹 Participate in and lead code reviews, design discussions, and DevOps improvements;
🔹 Mentor junior developers and help evolve our engineering best practices;


Interview stages:
🔹 HR interview;
🔹 Interview with VP R&D;
🔹 Semi Live-coding interview;
🔹 Tech interview - code review;
🔹 References;
🔹 Offer.
 

A successful product company based in Israel and Dnipro has an open position of Automation QA Engineer.

Requirements:

• Experience creating E2E tests for Cypress (TS/JS) and Cucumber
• Strong understanding of software QA methodologies, tools, and processes.
• Experience with Atlassian products Jira/Confluence.
• Effective use of debugging tools (Chrome/Firefox DevTools, IDE/editor debugger).
• Basic knowledge of the version control system – Git.
• Cross-browser and cross-platform testing expertise. (Optional: API testing).
•Experience in the gambling industry is required.

•Advanced English (spoken and written).

•Experience working with Artificial Intelligence (AI) systems: implementation, configuration, or utilization of AI-based solutions to optimize processes and improve efficiency.

Key Responsibilities:
•  Design, develop, and execute E2E tests using Cypress (TS/JS) and Cucumber.

• Working with developers and QAs to ensure better product delivery.

•  Maintain a strong understanding of software QA methodologies, tools, and processes.

•  Utilize Atlassian products such as Jira and Confluence for project management and documentation.

•  Conduct cross-browser and cross-platform testing to ensure compatibility and performance standards.

•Perform API testing to validate backend services.

Ready to offer
Social benefits, paid vacations, sick-leaves
Career possibilities with growing team.

We are looking for an experienced freelance developer to join an ongoing project for an international client. The role focuses on designing and building intelligent agent systems powered by large language models, alongside contributing to broader AI and Data Science initiatives.

Important!

This role involves some travel to the Netherlands to collaborate closely with the client, run in-person consulting sessions at the WeAreBrain office in Amsterdam, and occasionally visit the client’s office. Candidates must have the flexibility and ability to travel within Europe.

About the role You will work on both client-facing projects, designing LLM-powered agents, building the data infrastructure that supports them, and helping keep AI systems reliable in production. You'll collaborate directly with cross-functional teams, so strong communication skills are essential. The engagement is project-based 

Key responsibilities

·       Python software development across client and internal projects related to AI and Data Science

·       Design and implement LLM-powered AI agents, including agent configuration and prompt engineering

·       Build and maintain data pipelines that feed and support AI systems

·       Collaborate with cross-functional teams to define requirements and deliver features

·       Stay current with emerging AI frameworks, tools, and technologies

·       Contribute to monitoring and troubleshooting AI systems in production

Required skills and experience

·       Proficiency in Python, including async patterns, API integration, and production-quality code

·       Demonstrable experience designing and shipping LLM-powered agents (please share examples or repos)

·       Hands-on experience with frameworks such as LangChain, LlamaIndex, LangGraph, CrewAI, or similar

·       Solid understanding of prompt engineering, RAG pipelines, and tool/function calling

·       Experience building and maintaining data pipelines (e.g. Airflow, Prefect, Dagster, or equivalent)

·       Familiarity with vector databases and embeddings

·       Comfortable working in cross-functional teams and translating business requirements into technical solutions

·       Fluent professional English (written and spoken) – mandatory

Nice to have

·       Experience with multi-agent systems or agentic workflows in production

·       Background in MLOps, observability, or deploying LLM systems at scale

·       Experience with cloud platforms (AWS, GCP, or Azure)

·       Exposure to evaluation frameworks for LLM applications

Engagement details

• Freelance / contract basis
• Remote
• 4 days a week minimum
• Start: asap
• Estimated duration: 3-6 months, maybe longe
• Rate: [rate or "to be discussed based on experience"]

On behalf of our Client from France, Mobilunity is looking for a Backend Developer.

Our Client is building a new digital product focused on ticketing solutions for the entertainment industry. The platform enables users to easily discover, purchase, and manage tickets for various venues such as clubs, concerts, and other live events.

The product is designed to provide a seamless booking experience, allowing users to access events, manage reservations, and interact with venues in real time. At the same time, it empowers businesses to efficiently manage ticket sales, optimize attendance, and build direct relationships with their audience.

This is a greenfield project aimed at rebuilding the service from scratch using modern technologies and scalable architecture.

Their goal is to create a leading platform in the entertainment space, helping venues and event organizers deliver a smooth and engaging digital experience, while increasing customer loyalty and operational efficiency.
 

Requirements:

Backend:
 

• Strong experience with PHP 8.2+ (typed properties, enums, readonly classes, attributes, fibers)
• Solid knowledge of Symfony 7 (Messenger, Doctrine ORM, DI Container, Security, Twig)
• Experience with MySQL / Doctrine DBAL, including complex queries, indexing, EXPLAIN, and transaction management
• Hands-on experience with Docker / Docker Compose
• Confident use of Git workflows (pull requests, code reviews)
   

Architecture & Engineering:
 

• Practical experience with DDD (bounded contexts, aggregates, value objects, domain events)
• Strong understanding of Hexagonal Architecture (Ports & Adapters)
• Experience with CQRS (commands, queries, handlers)
• Hands-on experience with event-driven architecture (async processing, event listeners)
• Solid understanding of SOLID principles and clean code practices
   

Frontend (basic knowledge):
 

• Basic experience with React and Next.js (ability to read and modify existing components)
• Working knowledge of TypeScript
• Familiarity with Zustand
• Ability to work with Tailwind CSS
• Experience with Twig
   

AI:
 

• Experience using AI coding assistants (e.g., Claude Code)
• AI-assisted code generation, testing, and documentation
• Ability to review and validate AI-generated output

In return we offer:
 

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!

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.

At PwC, we collaborate with our clients, assist them in making informed decisions, operating efficiently, and we shape the future together. We offer enjoyable assignments and an inspiring working environment for this exciting challenge.

Sounds great? Now you have the opportunity to join us as a DevOps Engineer.

Our Smart Tax development team designs smart solutions for our clients’ accounting systems. If you feel like working on complex professional projects, you are the one we are looking for!

Why is this an exciting opportunity?

• You can work in a flexible, agile, and cheerful team, which works like a start-up in a corporation providing a safe environment; 
• You can work in a long-term project from the beginning and be actively involved in setting up the DevOps team and DevOps processes;
• You can receive instant feedback on your work as we work “close” to users, and you can have an overview of the entire development process.

What will you be doing?

• maintaining deployment pipelines, setting up and documenting CI/CD processes;
• setting up, configuring, and operating systems;
• improving the efficiency and performance of existing systems;
• liaising with and providing support for the development team;
• taking part in the design and development of business software deployment;
• What we work with: Azure Cloud technologies, Docker, Kubernetes (K8s, K3s), Kustomize, MSSQL Server, PostgreSQL, Azure DevOps, ServiceNow, JetBrains YouTrack, Git.

Our requirements:

• You must have at least 2-3 years of experience in DevOps;
• You must be acquainted with containerisation technologies (Docker, Kubernetes, Kustomize);
• You must be familiar with the operation of application servers;
• You must be able to work independently in your day-to-day work - we will support you in gaining new knowledge/solving new tasks;
• You must be experienced in the use of MSSQL/Azure SQL/PostgreSQL; 
• You must be knowledgeable about the Git version management system;
• You must have good communication skills in English (B2-C1).

Why is it worth choosing us?

• You will have the opportunity to work on diverse and exciting projects;
• You will work flexible hours and have the option of working from home;
• You will be part of a cool team open to new ideas;
• Our supportive leadership culture enables you to reach out and ask on an ongoing basis;
• You will have the opportunity to build relationships, which is indispensable for advancement;
• You will have various internal training programmes available to support your personal and professional development;
• We work towards shared goals and teamwork is essential to our day-to-day work;
• We expect and aim to achieve the highest professional standards.
• Besides work, we have the opportunity to be involved in numerous interesting corporate responsibility projects we favour, such as the Civil Mentoring Programme, the Volunteering Day, or trainings held for non-profit organisations;
• At PwC, we believe that diversity and complexity are key to building a responsible culture in which we create long-term value both for our employees and our clients. It is our primary goal to become an inclusive and supportive workplace by employing people with reduced work capacity.

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

Ruby Backend Developer (Remote)

Role

Bluegeko is looking for a Ruby Backend Developer to join our fully remote team. You will work on scalable backend systems and APIs for U.S. based partner projects, collaborating with developers, QA engineers, and product teams across international environments.

Tech Stack

• Ruby / Ruby on Rails
• PostgreSQL
• REST APIs
• Sidekiq
• Redis
• Docker
• AWS
• GitHub / GitLab
• CI/CD pipelines
• RSpec

Responsibilities

• Develop and maintain backend services and APIs
• Participate in architecture discussions and code reviews
• Collaborate with developers, QA, and product teams
• Analyze requirements and break down technical tasks

• Improve system performance and reliability

   

Requirements

• 3yrs+ Experience with Ruby and backend development
• Experience with Ruby on Rails and SQL databases
• Understanding of scalable backend systems and APIs
• Familiarity with Git workflows and CI/CD
• Good English communication skills

What We Offer

• Fully remote position
• Competitive salary
• Performance bonuses (For delivery)
• Flexible working hours
• International U.S. projects
• Professional development opportunities
• Work on large-scale infrastructure products used globally

A Sr Engineer is needed to join the development of a high-traffic web platform used by a broad customer base. The product ecosystem includes an AI-powered website builder, a customer management dashboard, and internal support tools.

This role is more focused on backend development with Node.js and TypeScript, but it also requires React experience so you can handle your frontend tasks independently rather than relying on a frontend developer. 

Infrastructure and production environments are handled by a separate DevOps team, so your focus will remain on application development rather than production support or infrastructure management.

Responsibilities

1. Design, develop, and maintain backend services throughout the full development lifecycle
2. Assist with frontend implementation when needed to deliver product features
3. Release new functionality and monitor feature stability after deployment
4. Work closely with Product, Platform, and Reliability teams
5. Contribute to technical improvements and enhancements within the existing architecture

Tech Stack

Node.js, TypeScript, React, Redis, MySQL, PostgreSQL, Elasticsearch, Kafka/RabbitMQ, monitoring and observability tools

Requirements

• Strong hands-on commercial experience with Node.js and TypeScript
• Experience with React and modern frontend engineering practices
• Solid experience with databases, caching, and data management approaches
• Experience investigating and resolving issues in distributed environments
• A product ownership mindset, with the ability to take features from concept to production
• English communication skills for daily collaboration and team meetings

Nice to Have

Experience with microservice architectures and API development

Experience with Docker and Kubernetes

Knowledge of application performance tuning and optimization

Basic understanding of Linux and networking

Familiarity with clean architecture principles and testing methodologies

What the Company Offers

• Fully remote work environment with a flexible schedule
• Paid vacation and days off
• Salary reviews twice a year
• B2B/contractor cooperation model with accounting support
• An opportunity to work on a large-scale product and influence technical direction