Jobs

Ajax Systems is a full-cycle company working from idea generation and R&D to mass production and sales. We do everything: we produce physical devices (the system includes many different sensors and hubs), write firmware for them, develop the server part and release mobile applications. The whole team is in one office in Kyiv, all technical and product decisions are made locally.

Ajax already released and continuously improves Malevich OS, which is a heart of our Hub’s. Now we are looking for Embedded Engineers who are ready to make our system better with us. For us never could be enough: there are still a lot of new functionality, sensors, features to make our system even cooler.
 

Required skills:

• Proven experience in developing embedded real-time applications for commercial products
• Excellent knowledge of embedded coding techniques, interfaces (e.g. SPI, I2C, UART, CAN, RS485) and subsystems
• Strong skills in various build systems
• Excellent knowledge of C programming language
• Experience in debugging and validating complex embedded systems and protocol stack
• Understanding of operating systems: embedded developers usually need experience in programming in embedded Linux or similar embedded operating systems
• Good hands-on experience of software engineering fundamentals such as testing, continuous integration, continuous deployment, pull requests and code reviews, source control, work item/issue tracking
   

Would be a plus:

• Experience with STM, Realtek MCU's
• Experience with programming RF modules and development low-energy wireless solutions.
• Scripting languages Python, Bash
• Commercial experience with specific real-time operating systems.
• Leading of software engineers teams
• Ability to multitask effectively among different projects in a fast-paced environment
• Basic electronics: embedded engineers use oscilloscopes, logic analyzers, and multimeters for debugging
• Experience in commercial IoT projects
   

Responsibility zone:

• Participate in the full embedded software life cycle: design, implementation, code reviews, documentation, testing and validation
• Analysis and systematic problem solving for SW reported issues
• Cooperate with electrical engineers to perform verification of new hardware from software team perspective. Review and provide feedback on the firmware specific aspects of hardware design
• Delivery highly reliable Malevich OS releases
• Work with high-level and technical requirements for research and development new features
• Participate in making design decision to develop high performance and reliable embedded systems
• Create unit and functional tests
• Be ready to mentoring of newcomers|trainee coworkers
• Be ready to lead a feature team of software engineers to achieve goals and challenges
   

With us you will enjoy:

• Working with a team of people to build the future of an industry
• Non-trivial challenges and various range of interesting tasks
• A flexible, friendly and collaborative work environment
• Corporate culture based on common sense
• Corporate English
• Compensation for speciallized training
• The opportunity to participate in the beta test project of Ajax security systems — receiving and testing new gadgets before their release.

We are an innovative iGaming company launching a cutting-edge Casino Project. Our team of 1,300+ professionals spans the globe, delivering successful projects across Tier 1–3 markets. We are looking for an experienced Head of Marketing to lead the development and execution of a comprehensive marketing strategy aimed at driving customer acquisition, retention, and brand positioning in the rapidly growing casino market.

What Experience Is Important to Us:

• 7+ years in marketing, including 5+ years in leadership roles.
• Proven experience in the online gambling or fintech industries.
• Expertise in digital marketing (SEO, SEM, SMM, email marketing, affiliate marketing).
• Strong track record in creating customer acquisition and retention strategies.
• Proficiency with data analytics tools to drive decisions based on performance metrics.
• Experience managing large marketing budgets and optimizing ROI.
• Leadership skills with a history of managing cross-functional teams.
• Advanced English; knowledge of additional languages is a plus.

What You Will Do:

• Develop and implement a comprehensive marketing strategy to drive growth, enhance customer engagement, and strengthen brand identity across all digital platforms.
• Manage key marketing channels such as social media, SEO, PPC, affiliate marketing, and influencer campaigns while collaborating with the product team to launch and promote new features.
• Analyze performance metrics, set KPIs, and make data-driven decisions to optimize ROI and improve campaign results, while efficiently managing the marketing budget and exploring new growth opportunities.
• Lead and mentor the marketing team, fostering creativity and professional development, and ensuring alignment with the company’s objectives.
• Plan and execute multi-channel campaigns, including email, SMS, and promotional activities, while expanding affiliate networks, building strategic partnerships, and monitoring their performance to maximize traffic and revenue.

Why You Should Join Us:

• Lead a transformative project in the fast-growing casino space.
• Enjoy competitive compensation and the opportunity to work with cutting-edge technologies.
• Collaborate with a talented, diverse team in a culture that values innovation and growth.
• Shape the future of a global iGaming company with a strong focus on professional development and leadership.
• Flexible working environment with access to the latest tools and resources.

Join us today to lead the marketing vision for our Casino Project and make a lasting impact in the industry! 🚀

LvivIT!LLC is a tech consulting company founded and headquartered in Lviv, Ukraine, since January 2016. From the very beginning, we’ve had the privilege of working with our very first and still our largest client GoDaddy.
 

Over the years, we’ve built a strong and trusted partnership, delivering high-quality solutions together with a team of talented engineers who value ownership, collaboration, and technical excellence.

We are currently looking for a Site Reliability Engineer (SRE) to join our team and contribute to building a scalable, secure, and reliable PKI certificate authority infrastructure that supports millions of users worldwide.

The Site Reliability Engineer will work on a team of other SREs to build and maintain a secure, scalable, and reliable PKI certificate authority infrastructure. You seek to automate, instrument, and make data driven decisions. You will work with other teams to solve security requirements; maintain useful documentation; and resolve production issues through effective troubleshooting and debugging. You will work independently to solve novel issues and evaluate/implement new technologies. You will proactively identify and resolve deficiencies and cost savings measures with the platform. While very capable of working independently, you will also work with other team members to move through blockers quickly. The ideal SRE welcomes and gives honest feedback and incorporates this feedback into improving the quality of your work and the platform

Responsibilities:

• Build and maintain tools to support a high-availability PKI platform.

• Automate infrastructure using Salt, Puppet, and Python.

• Operate and scale services with Consul, Nomad, and HAProxy.

• Troubleshoot complex issues across cloud, OS, and network layers.

• Collaborate across teams to meet security and operational requirements.

• Write and maintain clear documentation and runbooks.

• Continuously improve system reliability, performance, and cost-efficiency

Requirements:

• 5+ years in SRE, DevOps, or related roles.

• Strong Python scripting and automation skills.

• Experience with PKI, TLS, HSMs, and security-first infrastructure desired.

• Familiarity with tools like Nomad, Consul, HAProxy, Salt, Puppet, Docker, and AWS.

• Solid Linux, networking, and monitoring experience (Grafana, Elastic, etc.).

• Strong communication skills and a collaborative mindset.

• Ability to work independently and drive initiatives forward.

During the training period, you may need to work around 4 hours that match Phoenix working hours (Arizona time).

After training, we just need: a few hours of overlap with the Phoenix team (for meetings or handoffs), and for you to work during their night time, which means your regular day hours if you're in Europe or a similar time zone.

You’ll also be expected to be on-call
 

Q&A

Does the job come with a probation period?

Yes, there is a 3-month probation period.

What is the expected work schedule?

Full-time, flexible. You can work remotely or choose a hybrid mode (on-site in the Lviv office + remote).

Social Package & Benefits:

• Full medical insurance
• English lessons
• Minimal bureaucracy and formalities — focus on synergy and effective communication
• 7 unconfirmed sick days
   
• 20 vacation days
• Accountant assistance
• MacBook & accessories

Hiring process:

1. Screening call with Recruiter (soft skills interview) ~ 20 min
2. Technical interview with the Local Tech Expert + CEO of LvivIT! ~ 60 min
3. Final interview with Manager from GoDaddy + CEO of LvivIT! ~ 60 min
    

We are Leaply — an ecosystem of interconnected digital and physical products designed to help build healthy habits and improve quality of life. We’re developing a range of B2C products for global markets, including the US, Tier 1, Europe, and beyond.
 

This past June, we launched a new product — an app focused on habit-building with a subscription-based monetization model and a performance-first marketing approach through channels like Meta (Facebook, Instagram), Google, and TikTok. In just the first two months, we achieved positive unit economics and are on track to grow our revenue tenfold by the end of this year.

Our team is embarking on our third business venture together and has a proven track record of successful exits. We possess unique market insights that significantly enhance our chances of success — this isn’t our first time working with this business model, and we’ve already built products for this audience. Our core values are straightforward communication, quick decision-making, and aggressive, ambitious goals.
 

We’re hiring a Head of Engineering / Chief Technology Officer to lead our next phase of growth.
 

As we scale, we’re looking for a technical and strategic leader who will build a world-class engineering function across key domains — web, app, and AI — and pioneer a new frontier for us: hardware. You’ll have the rare opportunity to shape the company’s technological foundation, recruit exceptional talent, and define the gold standard for engineering and execution.

This is not just a tech role — it’s a business-critical leadership position. We’re looking for someone who can build systems, teams, and products — and help turn technical excellence into real-world value.

What you’ll do:

– Build and lead a high-performing engineering organization, rooted in excellence across web, mobile, and AI.

– Launch and scale our hardware engineering function, managing the full lifecycle of digital & physical product development.

– Hire, structure, and manage a world-class team of engineers — from early hires to future leaders.

– Define and champion an engineering culture focused on ownership, velocity, and innovation.

– Partner closely with product, design, and business leaders to co-own the roadmap and translate vision into scalable architecture.

– Ensure strong technical governance and decision-making aligned with long-term business goals.
 

What we’re looking for:

– A hands-on engineer with a strong technical foundation (experience in Back-End is preferable) and a love for solving complex problems.

– A mature engineering leader with a proven track record in hiring, growing, and managing engineering teams.

– Deep understanding of team dynamics, org design, performance management, and career development in technical teams.

– A product-oriented mindset and a collaborative leadership style — you're not just executing on specs, you're helping shape them.

– Comfortable operating in fast-paced, high-ambiguity environments, with a bias for action.

– English proficiency at B1+ level (we’re actively building a global team and hiring internationally).
 

Bonus points for:

– Experience in hardware startups: understanding the lifecycle of building and shipping physical products.

– Experience with AI / ML / data science systems — from prototypes to production (would be a plus)

– Previous experience in a high-growth product company or startup environment.
 

Leaply is backed by SKELAR, a venture builder with over 10 successful B2C businesses in its portfolio. 

SKELAR provides access to the best payment infrastructure for our business model, along with financial and legal support in our target locations. They also organize internal clubs focused on professional development in marketing, development, and payments. With SKELAR, there’s always someone to turn to for advice or assistance.

Beyond business, SKELAR build the SKELAR Foundation, a charitable initiative created by employees. Through this initiative, we create and fund large projects that help bring us closer to victory.

We’re looking for a Middle Golang Developer to join our team and build the backend of a high-performance, distributed B2B SaaS platform designed for companies that need reliable, scalable workflow engines and data pipelines.

This is a rare opportunity to work on a deeply technical product from the ground up, solve real scalability challenges, and push Go to its limits.

⚠️ Please DO NOT apply if you do NOT have proven, hands-on experience working with high-load systems and performance-critical applications.

🚀 Project

We are developing a highly configurable internal platform designed to orchestrate high-load workflows, event-driven processes, and data-intensive tasks at scale. This platform is built to be modular, fault-tolerant, horizontally scalable, and observable.

You’ll be a core contributor to the system’s architecture and work closely with our infrastructure, front-end, and product teams.

🎯 Key Responsibilities

• Design, build, and maintain backend services using Go
• Develop distributed services that communicate via Kafka and APIs
• Create fault-tolerant, scalable data pipelines and workflow processors
• Optimize performance at every level: memory, CPU, network, and IO
• Collaborate with the infrastructure team on Docker/K8s/AWS deployment strategies
• Work closely with product and frontend engineers to align backend logic with business goals
• Participate in architecture reviews, code reviews, and documentation
• Contribute to internal libraries, tooling, and engineering best practices
• Occasionally join technical calls with partners or clients (optional but appreciated)

🛠 Required Skills & Experience

• 5+ years of backend development experience
• 5+ years of hands-on Go development
• Strong experience with Kafka and Redis (mandatory)
• Experience working with ScyllaDB, ClickHouse, PostgreSQL, or MongoDB in high-load contexts
• Deep understanding of distributed systems, concurrency, and message-driven architecture
• Solid grasp of microservices architecture, service discovery, and networking
• Experience with Docker, Kubernetes, and AWS
• Familiarity with CI/CD practices and observability tools (e.g., Prometheus, Grafana, Jaeger)
• Strong testing habits (unit, integration, E2E)
• Proficiency in clean code principles, OOP, SOLID, and idiomatic Go

🧠 Engineering Mindset

• Build for performance, scale, and resilience
• Write simple, readable, and maintainable code
• Anticipate edge cases and system failure modes
• Push for continuous improvement of processes, tools, and infrastructure
• Comfortable balancing tech debt with delivery speed

👤 Personal Qualities

• Proactive and responsible (IT'S A MUST!)
• Comfortable working independently in a remote setup
• Strong team player who shares knowledge and supports others
• Excellent communication skills (written and verbal)
• Eager to grow and adopt new technologies

🎁 Offer

💻 100% remote work

💵 Competitive salary in USD

⏰ Flexible work schedule

🧠 Complex, rewarding technical challenges

💼 Experienced and friendly management

🌍 Opportunity to collaborate with fast-growing fintech and B2B SaaS teams

IT Craft invites an AI/ML Python Developer to join the company.

Requirements:

• Core Software Engineering: 5 + years Python 3.x; strong proficiency with FastAPI, Django or Flask; Git, unit testing, CI/CD, Docker;
• Generative AI & LLMs: Practical knowledge of leading models (GPT, Claude, Gemini, Mistral, Llama, Qwen, etc); working with them via public APIs, self-hosting or managed platforms (AWS Bedrock, Azure OpenAI, GCP Vertex);
• LLM Techniques: Retrieval-Augmented Generation (RAG), Supervised Fine-Tuning (SFT), Parameter-Efficient Fine-Tuning (LoRA/QLoRA/PEFT), Reinforcement Learning from Human Feedback (RLHF), prompt engineering and evaluation;
• Chatbots & Agents: Designing multi-turn conversational flows, tool invocation, agent routing/orchestration with LangChain, LlamaIndex, CrewAI, Semantic Kernel or similar;
• Vector Databases: Experience with FAISS, Milvus, Pinecone, Weaviate, Chroma, pgvector (indexing, similarity search, hybrid search);
• MCP Servers: Building and integrating Model Context Protocol (MCP) servers to securely expose domain tools/functions to LLMs;
• Automation Platforms: Advanced use of no-/low-code tools: n8n, Make (Integromat), Zapier (triggers, webhooks, custom modules);
• Soft Skills: Ownership mindset, rapid prototyping, clear technical writing; English at Upper-Intermediate (B2) or higher.

Key Responsibilities:

• Design & build end-to-end LLM workflows in Python (FastAPI, Django or Flask) — from data ingestion to inference APIs;
• Develop and fine-tune models (SFT, LoRA/QLoRA, RLHF) using PyTorch and modern open-source tooling;
• Implement RAG pipelines: document parsing, embedding generation, vector search and evaluation;
• Create chatbots / autonomous agents with frameworks such as LangChain, LlamaIndex, Semantic Kernel or CrewAI;
• Expose tools via MCP servers so that external LLMs can invoke domain-specific actions;
• Integrate no-/low-code automation (n8n, Make, Zapier) to orchestrate business workflows;
• Write clean, test-driven code; set up CI/CD; monitor, log, and continuously improve model performance and system reliability.

Nice to Have:

• Experience with data privacy & compliance (GDPR, SOC 2);
• Operate in cloud & on-prem (Docker, GPU instances, AWS Bedrock/Azure OpenAI, self-hosted LLMs, etc.);
• Hands-on experience with TensorFlow, PyTorch, NumPy, Pandas; ability to train, fine-tune, and evaluate ML/LLM models;
• Familiarity with front-end stacks (React/Next.js, TypeScript) for building AI-powered user interfaces;
• Bonus: Experience in Generative Graphics, including Stable Diffusion, Inpainting techniques, and ControlNets;
• Bonus: Experience in LLM hosting and working with llama.cpp.

IT Craft offers:

• Competitive compensation according to the qualifications;
• Flexible working hours, remote work;
• Opportunity for career growth;
• Reward for sport activities;
• In-house English training;
• A friendly team of open-minded people.

Please send your CV!
By submitting your application, you consent to the processing of your personal data in accordance with IT Craft’s Privacy Policy, available at itechcraft.com/datenschutz.

About the Project:
We’re looking for a skilled AI/ML Engineer to lead the development of intelligent components for a conversational chatbot and advanced search system. This includes everything from building solid data pipelines to integrating LLMs and optimizing semantic search.

🔧 What You’ll Be Working On:

• Review and analyze existing data sources and schemas.
• Design and implement ETL pipelines for both structured and unstructured data.
• Generate embeddings and manage vector databases (PGVector/PostgreSQL).
• Build and optimize similarity search and ranking algorithms.
• Fine-tune LLM prompts for chatbot interactions and contextual replies.
• Develop logic for user intent detection and dynamic response generation.
• Collaborate with the engineering team on deployment, APIs, and testing.
• Implement feedback loops to continuously improve model performance.
• Ensure role-based access, metadata tracking, and performance tuning.
• Deliver scalable, production-ready AI/ML components.

✅ We’re Looking For Someone Who Has:

• 5+ years of hands-on experience in AI/ML engineering, ideally in production environments.
• Strong Python skills: Pandas, NumPy, FastAPI, Langchain, etc.
• Practical experience working with LLMs (OpenAI, AWS Bedrock) and prompt engineering.
• Deep knowledge of embeddings, semantic search, and NLP techniques.
• Solid background with ETL workflows from diverse sources (APIs, SQL, documents, images).
• Experience working with vector databases — PGVector is a strong plus.
• Familiarity with unstructured data handling and metadata management.
• Hands-on deployment experience in Dockerized environments.
• Understanding of role-based access control and personalization logic.
• Strong communication and team collaboration skills, with the ability to lead technical decisions.
   

💬 If you're excited about building LLM-powered systems and solving real-world search + chatbot challenges — we’d love to talk.

🚀 About the Opportunity

We’re hiring a Senior AI/ML Engineer for a full-time, long-term engagement in the Mobility & Transportation Technology domain. You'll be part of a high-impact team working on distributed, scalable back-end systems that power smarter logistics across aviation, shipping, and railway sectors.

🏢 About the Company

Our client is a trusted outsourcing and outstaffing company with over 8 years of experience in web and mobile development. With 120+ experts across 6 countries, they’ve delivered tailored solutions in healthcare, real estate, e-commerce, fintech, and real-time communications.

They also build their own products, including:

• VidRTC – a WebRTC video conferencing engine
• Apartmii – a real estate rental platform

💼 About the Project

The project focuses on building serverless, event-driven infrastructure for global transportation services. You’ll join a cross-functional team working on distributed backends, micro/macroservices, and forecasting models that optimize supply chains and reduce costs.

👤 Who We’re Looking For

Must-have experience:

• 5+ years of hands-on experience with Python in distributed, serverless environments (preferably on AWS)
• Strong knowledge of AWS tools: Lambda, RDS, ECS, SageMaker Pipelines, Endpoints, Studio
• Solid understanding of microservices architecture
• 2+ years working with SQL or NoSQL databases in performance-critical applications
• Practical experience with time series forecasting (ARIMA, Prophet, XGBoost, DeepAR)
• Strong practice with A/B testing, model tuning, and real-world deployment
• Upper-Intermediate or better English communication skills

Nice-to-have:

• Familiarity with .NET Core

🛠️ What You’ll Be Doing

• Design, build, and maintain scalable serverless systems
• Develop and deploy predictive models and time series analytics pipelines
• Collaborate with other engineers, QAs, POs, and the client’s CTO
• Ensure smooth CI/CD pipelines and high-performance deployment flows
• Follow development best practices, write clean and testable code
• Contribute to high-load backend systems in a fast-moving environment

🎁 What You’ll Get

• Remote full-time work within the EEA
• 21 paid vacation days + 5 sick days per year
• 50% co-funding for courses, conferences, and English classes
• Personalized development plan and mentorship support
• Fast, efficient communication and quick decision-making processes
• Flexible hours, empathetic HR, and volunteering opportunities
• A strong team with a collaborative and growth-focused culture

💬 Interested? Let’s connect — this is a great opportunity to join a future-focused team building real-world ML solutions in a high-demand industry.

Who We Are
 

OpenMinds is a cognitive defence tech company countering authoritarian influence in the battle for free and open societies. We work with over 30 governments and organisations worldwide, including Ukraine, the UK, and NATO member governments, leading StratCom agencies, and research institutions.

Our expertise lies in accessing restricted and high-risk environments, including conflict zones and closed platforms.

We combine ML technologies with deep local expertise. Our team, based in Kyiv, London, Ottawa, and Washington, DC, includes behavioural scientists, ML/AI engineers, data journalists, communications experts, and regional specialists.

Our core values are: speed, experimentation, elegance and focus. We are expanding the team and welcome passionate, proactive, and resourceful professionals who are eager to contribute to the global fight in cognitive warfare.
 

Who we’re looking for

OpenMinds is seeking a highly skilled ML/NLP Engineer with expertise in designing and implementing machine learning models for semantic search, sentiment analysis, text clustering, and text summarisation tasks.

The ideal candidate should possess a strong background in ML, NLP, and deep learning techniques, along with proficiency in Python, using of LLMs, experience with popular ML libraries/frameworks such as TensorFlow, PyTorch, or Keras, and capable of delivering solutions end-to-end — from development to deployment (MLOps).
 

In the position you will:

• Design, develop, and implement machine learning models and algorithms for semantic search, sentiment analysis, text clustering, and text summarisation tasks
• Train and fine-tune large language models using transformer architectures like GPT, BERT, or RoBERTa
• Extract and process social media data as a source for training and evaluating NLP models
• Build and deploy semantic search systems, sentiment analysis models, text clustering algorithms, and text summarisation tasks
• Utilise techniques such as graph-based ranking, attention mechanisms, and sequence-to-sequence models for text summarisation
• Ensure scalability of ML models within Google Cloud Platform
   

We are a perfect match if you have:

• 4+ years of experience in machine learning, natural language processing, and deep learning techniques
• Proficiency in Python and experience with ML libraries/frameworks like TensorFlow, PyTorch, or Keras
• In-depth knowledge of large language models, including transformer architectures like GPT, BERT, or RoBERTa
• Familiarity with state-of-the-art NLP libraries and frameworks, such as HuggingFace
• Experience in training and fine-tuning language models
• Solid understanding of contextual word embeddings and their applications in NLP tasks
• Familiarity with data preprocessing techniques like tokenisation, stemming, lemmatisation, and named entity recognition
• Proficient in cloud computing platforms (GCP is preferred) for ML model development and deployment (MLOps)
• English level: B2+
   

We offer:

• Work in a fast-growing company with proprietary AI technologies, solving the most difficult problems in the domains of social behaviour analytics and national security
• Competitive market salary
• Opportunity to present your work on tier 1 conferences, panels, and briefings behind closed doors
• Work face-to-face with world-leading experts in their fields, who are our partners and friends
• Flexible work arrangements, including adjustable hours, location, and remote/hybrid options
• Unlimited vacation and leave policies
• Opportunities for professional development within a multidisciplinary team, boasting experience from academia, tech, and intelligence sectors
• A work culture that values resourcefulness, proactivity, and independence, with a firm stance against micromanagement

Top Netics is a venture builder. We create and launch our own tech products across the MENA region, the United States, Europe, and Africa — products that solve real-world problems and scale fast. 

We also work as a technical partner to select clients — helping them design, build, and bring their digital products to market. From first prototype to full rollout, we stay hands-on and delivery-focused. We collaborate with both private companies and government organizations. 

If you're looking to join a team that builds with respect, clarity, and purpose — you're in the right place. 

Job Overview 

We are seeking a highly skilled Lead Blockchain Engineer to drive the architecture, development, and performance optimization of blockchain systems across our products. This role focuses on Solana, high-performance DEX infrastructure, and real-world asset (RWA) tokenization, with an emphasis on backend systems supporting low-latency data flows and trading logic. 

You will play a critical role in shaping protocol-level implementations, managing validator operations, designing performant smart contracts, and aligning blockchain architecture with overall product and system requirements. 

Key Responsibilities 

• Develop, test, and deploy smart contracts on Solana and EVM-compatible chains. 
• Take ownership of the entire blockchain implementation, ensuring seamless interaction between blockchain components and backend systems. 
• Collaborate closely with product and engineering teams to define tokenomics, integration flows, and feature development. 
• Design and implement high-performance, low-latency infrastructure for DEX operations and trading logic. 
• Set up and maintain Solana validator nodes, including low-level modifications as needed. 
• Conduct blockchain code audits, performance analysis, and optimization. 
• Stay ahead of emerging protocols, tooling, and best practices to ensure system excellence. 

Skills & Qualifications 

• 5+ years of software engineering experience, with 3+ years in blockchain-focused roles. 
• Strong proficiency in Rust; deep knowledge of Solana’s architecture and smart contract development; experience with Solana validator setup and modification. 
• Experience with DEX protocols such as Raydium, Orca, Meteora (V2-V4); familiarity with Uniswap is a plus. 
• Knowledge of Jito, Turbine protocol, and cryptographic patterns used in DeFi. 
• High-performance backend development experience including Kafka, socket-level networking, and high-throughput databases. 
• Familiarity with RWA tokenization patterns and regulatory-aware blockchain designs. 
• Solid grounding in algorithms and optimization techniques. 
• Experience with Web3 tools, blockchain SDKs, and cross-chain architecture. 
• Hands-on experience deploying and managing smart contracts on EVM-compatible chains. 
• Comfortable with Linux environments and basic DevOps practices. 
• Strong analytical and problem-solving skills, proactive communication, and effective team collaboration. 

What We Offer 

• Competitive market-level salaries that reflect your skills and experience. 
• A supportive and inclusive community that values collaboration and mutual growth. 
• Dedicated mentorship programs led by senior developers to support your personal and professional development. 
• Opportunities to work on cutting-edge blockchain technologies with real-world impact. 
• Flexibility and resources to help you grow your expertise and advance your career. 

Please Note: 

To help us better understand your expectations, please include your salary expectations in your CV, motivation letter, or email when applying. This information is important for us during the recruitment process. 

We understand no candidate will check every box — if you bring deep Solana experience and a passion for performant, scalable systems, we encourage you to apply. 

We’re seeking an experienced .NET Developer to develop and support the U.S. fast-growing global trading platform. This role bridges regulatory compliance and product development, helping ensure the platform meets U.S. brokerage regulations (FINRA, SEC, SIPC) while delivering a seamless user experience.

Details: 
Experience: 5+ years as 
Schedule: Full time, remote in Europe. Need to work with teams from USA and Canada sometimes. 
Start: ASAP
English: Fluent

Ukrainina: Native 
Employment: B2B Contract

What you’ll do:
Collaborate closely with product owners, business analysts, and cross-functional teams (Mobile, Web, QA) to translate requirements into the backend architecture.
Design and build high-performance, scalable backend services in C#/.NET for our real-time trading platform.
Integrate with relational (MS SQL Server), NoSQL (Redis) databases and message broker (Service Bus, Redis) for efficient data storage and retrieval.
Write automated unit and integration tests (xUnit or similar) and contribute to CI/CD pipelines for continuous delivery.

What we need from you:
5+ years of backend development experience with C#/.NET.
Strong proficiency in .NET, Entity Framework Core, and building RESTful APIs.
Solid experience with SQL (MS SQL Server) and NoSQL (e.g. Redis) databases.
Hands-on experience with SignalR and WebSockets, including implementing both server-side and client-side components for real-time data streaming.
Experience with message brokers like Azure Service Bus and Redis Streams, and familiarity with async communication patterns for high-reliability systems
Experience in development, deployment and support of Azure based applications. 
Knowledge of Secure Coding Practices (OWASP)
Strong test-driven development skills (xUnit or similar) and attention to code quality.
Deep understanding of trading or financial systems, including real-time data processing and distributed architectures.
Excellent communication skills and a collaborative mindset to work with diverse technical and business teams.

Nice to have:
Prior experience building US-regulated fintech or trading platforms, with exposure to SEC/CFTC rules and KYC/AML compliance.
Familiarity with Grafana, Angular, Azure DevOps, and modern CI/CD pipelines.
Experience using AI/ML tools or automation to enhance development workflows.
Agile mindset and ability to adapt quickly in a startup-like environment.
 

We are looking for a Senior Infrastructure Engineer to manage and improve our IT systems and cloud environments. You’ll work closely with DevOps and security teams to ensure system availability and reliability.

Details: 
Experience: 5 years 
Schedule: Full time, remote
Start: ASAP
English: Fluent
Employment: B2B Contract

Responsibilities:

• Design, deploy, and manage infrastructure environments
• Automate deployments using Terraform, Ansible, etc.
• Monitor and improve system performance and availability
• Implement disaster recovery plans
• Support troubleshooting across environments

Requirements:

• Strong Linux administration background
• Experience with AWS, GCP, or Azure
• Proficiency with containerization tools (Docker, Kubernetes)
• Infrastructure as Code (IaC) using Terraform or similar
• Scripting skills in Python, Bash, etc.

Nuxgame is a leading B2B software provider in the global iGaming industry, delivering innovative and comprehensive solutions for online casino and sports betting operators. Our platform includes turnkey solutions, extensive game aggregation (offering access to thousands of titles), crypto casino capabilities, advanced sportsbook features, and powerful gamification tools. Since 2018, we've been empowering operators worldwide to launch successful brands, enhance player engagement, and thrive in the competitive iGaming market using cutting-edge technology. Our robust database infrastructure, centered on AWS Aurora MySQL, is fundamental to the performance and reliability of these solutions.

Key Requirements

• Administer, monitor, maintain, and optimize our AWS Aurora MySQL database clusters (including Provisioned and Serverless instances).
• Manage database infrastructure using the AWS RDS console, CLI, and APIs.
• Perform proactive and reactive performance tuning, including query optimization, indexing strategies, and configuration adjustments (parameter groups).
• Implement, test, and manage robust backup, recovery (including point-in-time recovery), and high-availability strategies specific to Aurora MySQL.
• Ensure database security best practices are implemented and maintained (encryption, access control, network security).
• Develop scripts (primarily Python) for automating routine database tasks, monitoring, and alerting.
• Collaborate closely with development teams (using PHP/Laravel) to optimize database interactions and schema design.
• Work with operations teams to ensure seamless integration within our AWS infrastructure.
• Diagnose and resolve complex database performance issues, connectivity problems, and data integrity incidents.
• Manage and optimize integrations between Aurora MySQL and other systems like Redis (caching) and Kafka (messaging/data streaming).
• Create and maintain clear technical documentation regarding database configurations, processes, and procedures.
• Participate in on-call rotation for critical database issues (if applicable).
• Potentially mentor junior team members.
   

Required Qualifications:

• Proven experience working as a Senior Database Administrator, with a strong focus on managing MySQL and/or AWS Aurora MySQL environments in production.
• Advanced expertise in SQL, specifically within the MySQL/Aurora dialect.
• Deep understanding and hands-on experience with AWS RDS and the specific features, capabilities, and limitations of Aurora MySQL (Provisioned and Serverless).
• Demonstrable experience in performance tuning, optimization (query analysis, indexing, caching), high availability configurations, and backup/recovery techniques for MySQL/Aurora.
• Strong familiarity with microservices architecture principles.
• Hands-on experience implementing and managing caching solutions with Redis.
• Proficiency in scripting languages, particularly Python, for automation and system integration.
• Solid understanding of managing databases within the AWS ecosystem (RDS, EC2, S3, CloudWatch, IAM, VPC).
• Excellent analytical and problem-solving skills with a proactive approach.
• Strong verbal and written communication skills.
• Ability to work effectively both independently and as part of a collaborative team.

Preferred Qualifications:

• AWS Certified Database - Specialty certification or other relevant MySQL/Aurora certifications.
• Experience managing multi-cluster environments ("server forests") or Aurora Global Databases.
• Familiarity with distributed messaging systems like Kafka.
• Working knowledge of PHP, sufficient to understand application interactions with the database (experience with Laravel framework is a plus).
• Understanding of compliance requirements relevant to the iGaming industry.
• Experience working within an Agile development framework.
• Familiarity with container orchestration tools like Kubernetes.

What We Offer:

• Work Format: Remote work format.
• Working Hours: Typically 09:00/10:00 to 17:00/18:00 (Kyiv time) (Monday-Friday).
• Compensation: Timely payment of competitive wages (salary).
• Employment: Official employment.
• Leave: 24 days of vacation annually.
• Team Environment: A friendly team and pleasant atmosphere without pressure or stress; open and democratic work organization.
• Projects: Interesting work on successful projects within the dynamic iGaming sector

We are hiring an experienced Network Engineer to support the planning, implementation, and management of our internal and customer-facing networks.

Details: 
Experience: 5 years 
Schedule: Full time, remote 
Start: ASAP
English: Fluent
Employment: B2B Contract

Responsibilities:

• Configure and maintain routers, switches, and firewalls
• Manage VPNs, VLANs, and access control
• Monitor and troubleshoot network performance
• Maintain documentation and security compliance
• Support network expansion projects

Requirements:

• 5+ years of experience in network engineering
• Deep knowledge of TCP/IP, BGP, OSPF, DNS
• Hands-on experience with Cisco/Juniper devices
• Experience with monitoring tools (Zabbix, Nagios, etc.)
• Certifications like CCNA/CCNP preferred

We are seeking a Senior Android Developer with 5+ years of experience building high-performance, scalable mobile applications. You'll join a cross-functional team to develop user-friendly, secure, and stable Android apps used by thousands (or millions) of users.

Details: 
Experience: 5 years 
Schedule: Full time, remote 
Start: ASAP
English: Fluent
Employment: B2B Contract

Responsibilities:

• Design, develop, and maintain Android applications using Kotlin/Java
• Collaborate with UI/UX designers and backend teams
• Optimize app performance and handle app store submissions
• Write unit, integration, and UI tests
• Ensure security, scalability, and responsiveness

Requirements:

• 5+ years of Android development experience
• Strong in Kotlin and Java
• Experience with Jetpack components, MVVM, Coroutines, Room, Retrofit
• Proficient in Git and CI/CD tools
• Familiarity with Firebase, Android Studio, and performance profiling tools
• Experience publishing apps on Google Play Store