Jobs

We are currently looking for a Brand Manager to develop and scale our Forex vertical across international markets.

We are particularly interested in professionals with experience in affiliate networks, working with brokers, brand partnerships, and traffic monetization.
 

Responsibilities

• Develop and manage relationships with brands, brokers, and affiliate partners.
• Support the growth and scaling of the Forex vertical across Tier 1–2 markets.
• Identify opportunities for new partnerships and brand development.
• Collaborate with internal media buying and affiliate teams.
• Work with traffic monetization models, including CPA, CPL, and CRG.
• Monitor partner performance, traffic quality, and business results.
• Negotiate partnership terms and identify opportunities for business growth.
   

Requirements

• Proven experience as a Brand Manager or relevant experience in affiliate marketing / business development.
• Experience in Forex, CFD, Crypto, or related financial verticals.
• Understanding of affiliate networks, traffic acquisition, and monetization models.
• Experience working with international GEOs, preferably Tier 1–2.
• Portfolio of brands, partnerships, or successful projects.
• Fluent Ukrainian or Russian — mandatory.
• English communication skills.
• Strong negotiation and relationship management skills.
   

What We Offer

• Fully remote, full-time position.
• Competitive compensation, discussed individually.
• Support from an experienced international team.
• Opportunity to develop and scale projects in the Forex vertical.
• Performance-driven environment with an in-house media buying team.
   

Interested?

Send your CV and share examples of brands, partnerships, or projects you've worked with.

AI Specialist (Python)

We are looking for an AI Specialist with strong Python skills and hands-on experience working with modern AI frameworks and LLMs. You will work on building, fine-tuning, and deploying machine-learning models into production, as well as developing Python backend services for model serving.

Responsibilities

• Develop and maintain AI/ML solutions using Python.
• Work with LLMs (OpenAI, Anthropic, Google Gemini) and frameworks like LangGraph and LangChain.
• Build and optimize pipelines using Vector Stores.
• Train, fine-tune, and evaluate ML models (image, text, audio, video).
• Work with neural networks, NLP, computer vision or reinforcement learning tasks.
• Create and improve classification models (shot/scene detection, captions, object labeling, attention scoring, etc.).
• Deploy AI/ML models into production environments.
• Develop Python backend (Flask or FastAPI) for serving models.
• Work with databases (SQL and NoSQL) for data storage, preprocessing, and model input pipelines.

Requirements

• >1 year of experience in AI/ML or applied machine learning.
• Strong Python skills.
• Experience with LLM frameworks: LangGraph, LangChain.
• Hands-on experience with LLMs (OpenAI, Anthropic, Gemini).
• Good knowledge of Vector Stores and their application.
• Solid understanding of ML algorithms, architectures, and workflows.
• Experience with ML frameworks: PyTorch, TensorFlow.
• Experience with image/text/audio/video model training and fine-tuning.
• Experience building backend services with Flask or FastAPI.
• Experience working with SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB, DynamoDB, etc.).

Nice to have

• Understanding of MLOps tools and CI/CD for ML.
• Experience with GPUs, model optimization, quantization.
• Familiarity with cloud platforms (AWS / GCP / Azure).

Team Summary

Our AI QA team provides end-to-end testing solutions of complex AI-driven features, hardware sensors supporting AI functionality, and large-scale cloud and embedded systems. We bring proven experience in both hardware and software product development, with a strong focus on motion detection technologies.

We specialize in manual testing across integration, E2E, and acceptance levels, ensuring comprehensive test coverage, continuous product state monitoring, and stable product releases.

The team contributes to the development of AI features and embedded systems.

Job Summary

We are looking for a QA Engineer with experience in software testing, preferably with exposure to embedded systems. In this role, you will be responsible for executing manual tests as well as executing our existing automation.

Responsibilities and Duties

• Conduct confirmation testing
• Estimate own tasks
• Execute existing test cases
• Report test results for assigned activities
• Report bugs according to the template

Qualifications and Skills

• 1+ year of experience in manual testing
• Strong knowledge of testing methodologies, test documentation practices, and test design techniques
• Understanding and hands-on experience with embedded systems testing
• Experience with bug tracking systems
• Basic experience with UNIX/Linux, including CLI navigation and use of regular expressions
• Basic experience with databases and SQL
• Basic experience with API testing using Postman/Charles (send requests, validate responses)
• Basic experience with Python (execute and maintain existing automation scripts)
• Basic experience in mobile testing
• Good written and spoken English
• Ability to work from our lab location in Gdansk

Nice to have

• Understanding AWS services
• Understanding CI tools (Jenkins)
• Basic experience with Raspberry Pi
• Basic knowledge in computer vision and machine learning

We offer multiple benefits that include

• The environment of equal opportunities, transparent and value-based corporate culture, and an individual approach to each team member
• Competitive salary packages with performance-based annual reviews
• Opportunity to receive a Performance Bonus for your individual achievements and a Loyalty Bonus recognizing your dedication to the company
• Employment via Contract of Employment (UoP) in complete alignment with Polish Labour Law
• Guaranteed paid vacation, public holidays, and medical leaves as per statutory regulations
• Continuous growth and development opportunities through internal knowledge hubs, corporate courses, and free English classes
• Comprehensive private medical insurance to supplement your standard NFZ coverage.

Our AI QA team provides end-to-end testing solutions of complex AI-driven features, hardware sensors supporting AI functionality, and large-scale cloud and embedded systems. We bring proven experience in both hardware and software product development, with a strong focus on motion detection technologies.
We specialize in building and executing multi-layered automation frameworks across integration, system, and acceptance levels, ensuring comprehensive test coverage, continuous product state monitoring, and stable product releases.
The team contributes to the development of AI features and embedded systems.

We are looking for a QA Engineer with solid experience in software testing, preferably with exposure to embedded systems. In this role, you will be responsible for executing manual tests as well as expanding and maintaining our existing automation coverage.

Responsibilities:

Define requirements for test environments, data, resources, and tools
Create and maintain traceability matrices
Provide accurate high-level and detailed estimations for assigned activities and features
Develop and execute Test Plans in line with standards
Ensure automated test coverage (execution, analysis, reporting)
Contribute to the development and expansion of the existing Python test framework
Interpret and apply product and project metrics (technical and quality)
Prepare Test Summary Reports for features and programs in line with standards
Monitor, update, and implement new QA approaches based on standards (ISO/IEC/IEEE, ISTQB, RST)
Apply Quality Management principles (Planning, Assurance, Control, Continuous Improvement)

Skills:

5+ years of experience as a QA engineer

Basic knowledge in computer vision and machine learning
Understanding and hands-on experience with embedded systems testing
Good Automation skills with Python
Hands-on experience in UNIX/Linux, including CLI navigation and use of regular expressions
Experience with databases and SQL
Experience with CI tools (Jenkins)

Nice to have:

Basic experience with Raspberry Pi
Hands-on experience in Bash scripting
Familiarity with AWS services
Practical experience with API testing (CRUD operations, debugging with Postman or similar tools)
Experience in mobile testing
ISTQB Certification

We offer multiple benefits that include

• The environment of equal opportunities, transparent and value-based corporate culture, and an individual approach to each team member
• Competitive salary packages with performance-based annual reviews
• Opportunity to receive a Performance Bonus for your individual achievements and a Loyalty Bonus recognizing your dedication to the company
• Employment via Contract of Employment (UoP) in complete alignment with Polish Labour Law
• Guaranteed paid vacation, public holidays, and medical leaves as per statutory regulations
• Continuous growth and development opportunities through internal knowledge hubs, corporate courses, and free English classes
• Comprehensive private medical insurance to supplement your standard NFZ coverage.

About the company:
We are an international IT company in iGaming, focused on building our brand in the global market. Our key markets are the UK, Germany, and Australia. We work with an international audience and are growing a strong team of professionals who value creativity, initiative, and results.

Responsibilities:

• Develop and execute SMM strategies for Facebook, Instagram, Telegram, TikTok, and YouTube;
• Create engaging content: copy, creatives, memes, and videos;
• Set up and optimize paid social campaigns;
• Analyze metrics, engagement, and traffic acquisition performance;
• Grow the community and increase brand awareness;
• Work closely with designers, producers, and affiliate managers.

Requirements:

• 2+ years of SMM experience in iGaming (required);
• Proven experience working with UK, German, and Australian markets (our key GEOs);
• Strong knowledge of social media trends, formats, and algorithms;
• Hands-on experience with analytics tools and paid advertising;
• Ability to create viral, engaging content, including with AI tools;
• English at B2 level or higher.

What we offer:

• Remote work with flexible team collaboration;
• Full creative freedom and real influence on the promotion strategy;
• Work with an international audience on ambitious projects;
• Professional and career growth opportunities;
• A close-knit team open to new ideas and initiatives.

Come Back Agency helps US software and technology companies run their hiring process. We work with delivery and leadership teams to define roles, screen candidates, and manage interviews. Successful candidates are hired directly by the company and become part of its team.

This position is with a US-based software company providing custom development and AI implementation for North American clients. The team builds and maintains production software, including AI-enabled systems, and works in long-term client engagements. Team members operate as part of an internal, distributed team and collaborate directly with client stakeholders.

About the Role

As we scale our operations to meet enterprise demands, we are looking for a driven DevSecOps Engineer who can help harden our cloud infrastructure, elevate our security posture, and drive compliance readiness. In this role, you’ll play a pivotal part in helping us pass enterprise vendor reviews and achieve key certifications like SOC 2 and ISO 27001. You will work closely with cross-functional engineering and leadership teams spanning infrastructure, security, and compliance.

What You Will Do

• Infrastructure & CI/CD: Build, scale, and maintain secure cloud infrastructure and automated CI/CD pipelines.
• Access & Security: Implement robust access controls, least privilege principles, secrets management, and security hardening across environments.
• Observability & Auditing: Standardize logging, monitoring, alerting, and comprehensive audit trails.
• Secure SDLC: Drive secure software development lifecycle practices, including code scanning, dependency scanning, and change control.
• Incident Response: Establish baseline incident response procedures, including runbooks, on-call expectations, and structured post-incident reviews.
• Compliance Readiness: Take ownership of technical controls and evidence gathering for SOC 2 and/or ISO 27001 frameworks.
• Vulnerability Management: Maintain proactive vulnerability patching routines for infrastructure and dependencies.
• Reliability & Recovery: Enhance backup, disaster recovery, and business continuity practices.
• Client Security Support: Respond to client security questionnaires and support audits with clear technical answers and evidence.

Requirements

• Experience: 2+ years of hands-on DevOps experience managing cloud infrastructure and deployment pipelines.
• Cloud & IaC: Strong practical experience with AWS (IAM, networking, compute, logging) and Terraform (Infrastructure as Code).
• Containers & GitOps: Hands-on experience with Kubernetes (Amazon EKS preferred), Helm, and GitOps workflows (ArgoCD or similar).
• CI/CD: Experience building and configuring CI/CD pipelines from scratch (e.g., Bitbucket Pipelines, GitLab CI, GitHub Actions).
• Security & Compliance: Familiarity with modern security tooling (SAST, DAST, dependency scanning, secret scanning), combined with hands-on experience in SOC 2 and/or ISO 27001 compliance preparation (controls implementation, gap analysis, and evidence collection using Security Hub or similar cloud security tooling).
• Documentation & Process: Strong ability to document systems clearly and collaborate effectively with auditors or compliance platforms.
• Communication: B2+ English level (upper-intermediate or higher) for seamless daily collaboration with US-based client stakeholders.

Nice to Have

• AWS certifications (e.g., DevOps Engineer - Professional or SysOps Administrator Associate).
• Experience with compliance automation tools such as Vanta, Drata, or Secureframe.
• Background working in regulated industries (e.g., HIPAA).

What We Offer

• Working hours aligned with US time zones, typically 16:00–23:59 Kyiv time.
• Company-sponsored English lessons to support clear and confident communication.
• Paid vacation and sick days.
• Fully remote work.
• Opportunities for professional growth within the team.
• Structured, personalized onboarding to help you ramp up effectively.

Apply with your resume and a short note outlining your relevant experience. You can also submit it through our website at comeback.ua. Selected candidates will be contacted by Come Back Agency.

Core skill: Solidity and smart contracts development — this is the primary focus of the role and the key selection criterion.

• At least 4 years of commercial development experience
• Deep knowledge of Go and Solidity
• Hands-on experience with blockchain platforms (Ethereum, Solana, Tron, etc.), DeFi and dApp architectures
• Candidates must be able to discuss real projects, system architectures and their own experience in depth during the technical interview

Position Name: Research & Development Engineer (Blockchain / Smart Contracts)
Level: Senior
Headcount: 3 (client stated 2–3 engineers)

Hard skills requirements:

• At least 4 years of experience as a developer
• Solidity and smart contracts development - core skill, primary focus of the role
• Deep knowledge of Go
• Expertise in Web3
• Experience working with blockchain platforms (Ethereum, Solana, Tron, etc.)
• Experience with cryptographic protocols and smart contracts
• Experience with DeFi
• Knowledge of decentralized application (dApps) architectures
• Understanding the specifics of cryptocurrency transactions and smart contracts
• Experience with version control systems (Git)

Nice to Have:

• Rust, JavaScript, Node.js, Python
• Experience with financial operations and high-load systems
• Knowledge of containerization and DevOps infrastructure (Docker, Kubernetes)

Soft skills requirements:

• A passion for problem-solving and finding innovative solutions
• Strong communication — able to discuss real projects, architectures and past experience in technical depth
• Research mindset — comfortable with R&D work on new technologies
• Proactivity and ownership

Responsibilities:

• Develop and implement innovative solutions for the company's products in the blockchain and crypto-processing sector
• Write clean, high-quality, maintainable code
• Integrate new functionalities into existing solutions and system architectures
• Integrate blockchain platforms with the company's existing systems
• Conduct code reviews and ensure code security
• Participate in architectural discussions and develop scalable system architectures
• Work with APIs to interact with crypto-payment gateways and external services
• Analyze system performance, identify bottlenecks, and optimize the system
• Participate in the development of new products and services based on blockchain technologies, including MPC and distributed signing

English: Upper-Intermediate (client's own posting states B1-B2)
Office/Remote: Remote. Full-time preferred through EOY 2026 (part-time 15–20 hrs/week possible); full-time required from 2027
Time zone: EST overlap — team is US-based in Tampa, Florida

We are looking for a Corporate Legal & VAT Specialist to join our PSP Department and independently own the corporate and legal documentation function within our international business structure.
 

This role is highly autonomous and involves direct cooperation with Compliance, Finance, auditors, accountants, tax advisers and external legal / corporate service providers.
 

You will work hands-on with Cyprus corporate structures, corporate documentation, contracts, audit support and Cyprus VAT-related matters, as well as cross-border counterparties and international business structures.
 

What you’ll do:

• preparing a complete legal documentation package for each company’s annual audit;
• maintaining and updating corporate documentation, including constitutional documents, certificates, registers, resolutions, powers of attorney, and information on directors, shareholders, and UBOs;
• Ppoviding comprehensive legal support to companies across multiple jurisdictions, including incorporation and corporate administration through external service providers, as well as drafting and reviewing agreements, invoices, service acceptance certificates, and supporting materials required for the proper documentation of business transactions;
• preparing legal explanations in response to requests from auditors, accountants, and tax advisers;
• establishing a legally and documentarily consistent framework for relationships with existing counterparties, taking into account the actual partnership model, financial flows, and Cyprus VAT requirements, including the application of the reverse charge mechanism.
   

What we’re looking for:

• 3+ years of experience in corporate law, corporate administration, legal operations or a similar role;
• hands-on experience with Cyprus companies;
• pactical knowledge of Cyprus corporate law;
• experience supporting annual audits and audit documentation;
• practical knowledge of Cyprus VAT, VIES and reverse charge;
• experience working with corporate registers, resolutions, powers of attorney, UBO/shareholder documentation and other corporate records;
• experience preparing and reviewing commercial agreements and supporting documents;
• strong written English;
• high level of ownership, attention to detail and ability to work independently;
• ability to understand the actual business relationship behind the documents and build the appropriate legal and documentary framework around it;
• ability to communicate effectively with Finance, Compliance, auditors, accountants, tax advisers and external corporate service providers.
   

Will be a plus:

• experience working with international groups and cross-border business structures;
• experience in fintech, PSP, EMI, VASP or other regulated / financial services businesses;
• experience working with international corporate service providers;
• experience handling multiple Cyprus entities simultaneously;
• understanding of international corporate and compliance processes.
   

What makes this role interesting:

• fully remote work;
• high level of autonomy — you will own your functional area rather than work under constant supervision;
• direct communication with Compliance, Finance, auditors and external advisers;
• hands-on work with real Cyprus corporate structures and international business operations;
• ppportunity to work closely with an international PSP business and gain deeper exposure to corporate, legal and compliance processes.

We are a senior engineering team hiring a backend engineer for a long-term role inside a client's product team. The client is a product company with a large user base. We share its name only with engineers who pass our technical call.

Engineers there shape what gets built, not only how, and work directly with product people.

What matters most to us
• You have built a product that people use every day, and you can point to the parts you owned
• You think about the person using the product. You question a feature when it does not serve them and suggest a better one
• Experience with creative, media or design products, or with shipping AI features to users, is a strong plus

What you will do
• Build and scale backend services in Go
• Run background jobs reliably, with queues, retries and idempotent steps
• Turn new capabilities into features people actually use
• Work with a cloud stack, message queues and APIs

You should have
• 3+ years of Go in production and 5+ years of backend work overall. If you come from a strong product team and work in another language, apply anyway and tell us how fast you would pick up Go
• Experience owning parts of a production system end to end
• Fluent English for daily work with the client team

The role is full time, 40 hours a week, long term, with a working day that overlaps European business hours. Individual engineers only, no agencies.

How we hire: a call with our CTO about your product work and your code, then a call with the client's team. Both are live, with screen share and without AI assistants.

To apply, open your application with a link to a product you helped build and one sentence on what you owned in it. Applications without it will not be read.

Sii Ukraine is a subsidiary of Sii Poland — the leader in IT, engineering, and consultancy services with over 7500 IT experts in Poland and more than 250 prestigious customers.

We are looking for a QA Automation Engineer to join a large-scale online betting and gaming platform supporting internationally recognized brands.

The project focuses on delivering reliable, high-quality web applications and seamless end-to-end customer journeys in a highly transactional environment.

You will work closely with QA Engineers, Developers, Product Owners and other stakeholders throughout the Software Development Lifecycle, with a strong focus on test automation, regression coverage and continuous delivery.

Responsibilities:

• Develop and maintain automated end-to-end tests using Playwright and JavaScript\TypeScript
• Design and extend automated regression test suites for web applications and critical customer journeys
• Create reusable and maintainable test automation components
• Improve and extend the existing automation framework
• Analyse business requirements, user stories and acceptance criteria to define appropriate test coverage
• Perform functional, regression, integration and exploratory testing
• Validate end-to-end flows across multiple application components and integrated services
• Identify, document and track defects
• Support developers with root cause analysis
• Investigate failed automated test executions and distinguish application defects from automation issues
• Maintain and improve automated tests to increase stability, reliability and test coverage
• Support quality validation of new features before production deployment
• Collaborate with Developers, Product Owners, Business Analysts and other QA Engineers
• Participate in refinement, planning and other Agile/Scrum activities
• Contribute to the continuous improvement of QA processes, testing practices and automation strategy
• Support automated test execution as part of CI/CD pipelines

Requirements:

• Strong experience in QA Automation
• Hands-on experience with Playwright
• Good practical knowledge of JavaScript
• Experience creating and maintaining automated E2E tests
• Experience with web application testing
• Good understanding of functional, regression and integration testing
• Experience working with automated regression suites and test frameworks
• Understanding of CI/CD and automated test execution in pipelines
• Ability to analyse requirements and define test coverage
• Experience investigating test failures and identifying the root cause
• Experience working in an Agile/Scrum environment
• Good communication and collaboration skills
• English at a level sufficient for communication within an international team
• Tax residence in Ukraine required

Nice to Have:

• Experience working with large-scale or highly transactional web platforms
• Experience testing complex customer journeys
• Experience with integrated services and distributed application components
• Experience improving existing automation frameworks
• Experience with API testing
• Experience working with international teams and stakeholders

Team & Ways of Working

• Agile/Scrum methodology
• Close collaboration between QA, Development, Product and Business teams
• Strong focus on test automation and continuous improvement
• Automated testing integrated into CI/CD processes
• Focus on quality throughout the entire Software Development Lifecycle

We are the creators of a new fintech era!

Our mission is to change this world by making blockchain accessible to everyone in everyday life. WhiteBIT is a global team of over 1,200 professionals united by one mission — to shape the new world order in the Web3 era. Each of our employees is fully engaged in this transformative journey.

We work on our blockchain platform, providing maximum transparency and security for more than 8 million users worldwide. Our breakthrough solutions, incredible speed of adaptation to market challenges, and technological superiority are the strengths that take us beyond ordinary companies. Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT and VISA.

Requirements:

We're looking for a Senior / Staff-level engineer with an open mind and a builder's instinct - someone who goes beyond executing tasks and is ready to own the High-Performance practice end-to-end: establish engineering processes, drive R&D, evaluate and champion new technologies, and lead their adoption in production.

The ideal candidate can bridge the gap between business requirements for low latency and high throughput and the realities of existing infrastructure - translating "we need to be faster" into an actionable technical roadmap. You bring a fresh perspective, know how to organize the work, and are equally comfortable optimizing a hardware parameter and presenting a strategy to stakeholders.

We expect 5+ years of hands-on experience as a DevOps/SRE/Systems Engineer in performance-critical environments - and the maturity to grow yourself and grow a team around you.

• Linux: Advanced administration and OS-level tuning — real-time OS configurations, cgroups, CPU isolation, memory management, and low-level network stack configuration.
• Hardware Internals: Deep understanding of CPU power and performance states (C/P-states), Hyper-Threading / SMT trade-offs, TX/RX ring configuration, and the full data path from NIC through PCIe to memory and CPU. Ability to reason about and tune each stage of that path under production load.
• Networking & TCP Internals: Deep knowledge of TCP/IP — congestion control, ACK behavior, buffer tuning, and protocol-level latency sources. Strong Linux networking fundamentals: low-latency NIC configuration, bypass networking technologies (DPDK, RDMA), and market connectivity (multicast feeds, co-location networks, VPNs).
• Performance Engineering: Practical experience profiling latency-sensitive systems; familiarity with tools such as perf, flamegraph, strace, tcpdump, eBPF, and hardware performance counters.
• Containerization: Deep knowledge of Docker and Kubernetes, including low-overhead deployment patterns and performance trade-offs of containerized workloads.
• IaC: Proven track record with Ansible, Terraform, and Helm in production environments.
• Monitoring: Hands-on experience with the Prometheus / Grafana stack; ability to build latency-aware dashboards and alerting (P99, jitter, throughput KPIs).
• Scripting: Solid scripting in Bash and Python; Golang is a strong plus given its role in systems tooling.
• CI/CD & Secret Management: Strong grasp of CI/CD pipelines with experience integrating performance validation stages; familiarity with Vault for secrets management.
• Security: Understanding of DevSecOps principles and Kubernetes security policies.

Key Performance Metrics You'll Work With

Latency Distribution - P99 / P99.9 across the tick-to-trade path, using hardware-level timestamps (NIC/PTP).

Jitter - variance between min/max latency, measured over large sample sets in live market conditions.

Throughput - messages per second (orders + cancels) under exchange burst scenarios.

System Reliability - сontinuous monitoring of uptime

Extra Credit / Big Pluses

• Hands-on experience with kernel-level optimization: syscall reduction, network stack bypass (DPDK, RDMA, Solarflare OpenOnload).
• Background in HFT, algorithmic trading, or other ultra-low-latency production environments.
• Experience with hardware timestamping, PTP/IEEE 1588, and precision time synchronization.
• Familiarity with colocation operations and exchange connectivity (cross-connects, proximity hosting).
• Proven SRE track record with formal SLO/error budget frameworks in latency-sensitive contexts.
• DevSecOps: vulnerability scanning, Zero Trust, RBAC, and secure delivery pipelines.
• Understanding of business processes in FinTech, crypto, or electronic trading.

Responsibilities:

• Low-Latency Infrastructure Ownership: Design, deploy, and continuously optimize infrastructure for latency-sensitive trading systems — market data handlers, order/deal gateways, and risk check engines. Own the full stack from bare metal to application delivery. Define and maintain a reference architecture for low-latency connectivity when onboarding new trading venues, including reproducible configuration baselines, validation procedures, and performance acceptance criteria — so every new venue goes live on a proven, optimized stack.
• Cloud & Hybrid Network Connectivity: Design, implement, and maintain complex low-latency network solutions for cloud provider interconnects - including cross-connects and Direct Connect / ExpressRoute links between cloud regions, hybrid on-premise/cloud topologies, and high-throughput inter-server fabrics. Ensure both latency minimization and fault tolerance at every layer: physical redundancy, failover routing, and path diversity across providers and regions.
• Hardware & OS Stack Tuning: Go deep on the full hardware and OS stack - CPU pinning, C/P-states, HT/SMT configuration, NUMA topology, IRQ affinity, TX/RX ring sizing, NIC offloading, and network stack bypass (DPDK/RDMA where applicable). Understand the complete data path from NIC through PCIe to memory and CPU - and optimize every hop.
• Infrastructure as Code (IaC): Automate provisioning and configuration of high-performance environments using Ansible, Terraform, and Helm - with performance reproducibility as a first-class requirement.
• Latency Profiling & Benchmarking: Systematically profile and debug latency hotspots across the full execution path. Establish and maintain SLA/SLO targets; track P99/P99.9 distributions, jitter, and throughput - not just averages.
• CI/CD for Performance: Build and maintain CI/CD pipelines that include automated latency regression testing, so performance degradations are caught before they hit production.
• Monitoring & Observability: Design and operate comprehensive latency monitoring and alerting systems (Prometheus, VictoriaMetrics, Grafana) - including hardware timestamping (NIC/PTP) and fine-grained performance telemetry.
• Colocation & Network Placement: Research, evaluate, and manage optimal server placements - colocations, cross-connects, proximity hosting. Work closely with network and infrastructure teams to minimize physical and logical distance to exchanges.
• High Availability & DRP: Design systems that maintain stability and reliability under peak load while continuously pushing latency lower - zero regressions, always.
• Cross-Team Collaboration: Work alongside algo developers, quant teams, and network engineers to ensure trading strategies execute with minimal infrastructure overhead.

Working terms

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.

We are the creators of a new fintech era!

Our mission is to change this world by making blockchain accessible to everyone in everyday life. WhiteBIT is a global team of over 1,200 professionals united by one mission — to shape the new world order in the Web3 era. Each of our employees is fully engaged in this transformative journey.

We work on our blockchain platform, providing maximum transparency and security for more than 8 million users worldwide. Our breakthrough solutions, incredible speed of adaptation to market challenges, and technological superiority are the strengths that take us beyond ordinary companies. Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT and VISA.

Requirements:

We're looking for a DevOps engineer with 4+ years of hands-on experience, at least 2 of them spent building and running data or analytics infrastructure. You've designed systems that move, store, and serve data at scale. Warehouse maintenance is part of your daily routine, and writing Python, Bash, or SQL scripts is second nature. You treat data security as a core responsibility: you protect confidentiality, enforce zero-trust, least-privilege access, and automate everything you touch. Solid IaC skills are a must.

• IaC & CI/CD: Production experience with Terraform, Ansible, and Helm, plus CI/CD systems (GitLab CI, GitHub Actions, Jenkins, or ArgoCD). We expect you to design pipelines, not just use them.
• Containerization: Working knowledge of Docker and Kubernetes, including running data workloads on it (like Spark on Kubernetes, stateful services, operators).
• Cloud: Solid experience with AWS (S3, EC2, EMR, Redshift, Glue, IAM) or an equivalent cloud provider.
• Linux & Networking: Solid Linux administration skills and foundational networking knowledge relevant to distributed systems.
• Analytical Databases: Hands-on operation of ClickHouse and/or the Hadoop ecosystem (HDFS, Hive, YARN), including cluster setup, tuning, and scaling.
• Data Warehouses: Practical experience with Snowflake or Redshift, covering warehouse sizing, workload management, performance tuning, and cost control.
• Large Databases: Experience administering databases at terabyte scale: replication, backup and restore strategies, partitioning, and migrations with minimal downtime.
• SQL & Scripting: Strong SQL skills, including reading execution plans and optimizing heavy queries. Confident in Python and Bash for automation, data parsing, and investigation.
• Data Lakes & Object Storage: Working knowledge of S3-compatible storage, columnar formats, partitioning strategies, and data lifecycle management.
• Orchestration & Streaming: Familiarity with Airflow (or similar orchestrators) and Kafka, and how they fit into data pipelines.

Extra Credit / Big Pluses

• Experience with Tableau, Power BI, Looker, Superset, or similar BI tools, including administration, performance tuning, and data source design.
• Hands-on experience with dbt and analytics engineering practices.
• Experience with open table formats (Apache Iceberg, Delta Lake, Hudi) and query engines like Trino/Presto or Athena.
• FinOps experience in data platforms: managing Snowflake credits, Redshift clusters, and storage costs at scale.
• Spark performance tuning and job optimization.
• Change data capture (CDC) with Debezium or similar tools.
• Data quality tooling (Great Expectations, Soda) integrated into CI/CD.
• Golang or Rust tooling experience.
• Knowledge of data governance and compliance (GDPR, data retention, PII handling).
• Understanding of business processes in the FinTech/Banking/Crypto sector.

Responsibilities:

• Infrastructure Ownership: Own the infrastructure behind our data and analytics platform, from provisioning to daily operations. Keep it reliable, scalable, and cost-efficient as data volumes grow.
• Infrastructure as Code: Provision and configure all data infrastructure with Terraform, Ansible, and Helm. 
• CI/CD Pipelines: Build and maintain delivery pipelines for both infrastructure and data code (ETL jobs, Airflow DAGs, dbt models, schema migrations), with automated testing, safe rollouts, and fast rollback.
• Database & Warehouse Operations: Maintain ClickHouse, Snowflake, Redshift, and вPostgreSQL at multi-terabyte scale, handling replication, backups, upgrades, capacity planning, and disaster recovery.
• Data Lake Storage: Manage S3-compatible data lake storage, including partitioning, file formats, and lifecycle policies.
• Automation & Script Optimization: Refactor and automate Python, Bash, and SQL scripts to cut runtimes and eliminate manual work.
• Performance & Cost: Right-size clusters and warehouses, tune heavy queries, and keep compute and storage spend under control.
• Monitoring & Alerting: Cover data infrastructure with metrics, logs, and alerts for cluster health, pipeline SLAs, and job failures.
• Security & Access Control: Enforce least-privilege access, secrets management, encryption, and auditability for sensitive data.
• BI Infrastructure: Support the infrastructure behind Tableau or similar BI tools.
• Big Data Platforms: Deploy, tune, and troubleshoot Hadoop, Spark, and Kafka clusters in production.
• Collaboration: Work with data engineers, analysts, and developers to turn their workloads into solid infrastructure decisions.
• Security & Access Control: Implement role-based access, secrets management, encryption at rest and in transit, and auditability for sensitive datasets in line with regulatory requirements.

Working terms

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!

Role Overview

We are looking for a Senior Email Marketing Manager to own our newsletter portfolio, driving engagement, retention, deliverability, and revenue.

You will manage 7–10 newsletters, working closely with writers and designers to optimize content, subscriber experience, and commercial performance. This is an individual contributor role with the opportunity to build and lead a team as the portfolio grows.

Key Responsibilities

• Own the strategy, publishing, and optimization of multiple newsletters.
• Improve key performance metrics, including open rate, CTR, subscriber retention, and revenue.
• Optimize subject lines, content, layouts, CTAs, and publishing schedules.
• Develop subscriber lifecycle, segmentation, and re-engagement campaigns.
• Own email deliverability, including sender reputation, domain health, authentication (SPF, DKIM, DMARC), IP management, and inbox placement.
• Monitor list quality, suppression, and hygiene to maintain healthy databases.
• Optimize newsletter monetization through advertising, sponsorships, and affiliate placements.
• Conduct A/B tests and analyze campaign performance to improve results.
• Ensure all campaigns meet editorial, branding, and quality standards.
• Collaborate with writers, designers, and internal stakeholders to deliver high-quality newsletters.
• Build scalable processes, documentation, and reporting to support portfolio growth.

Requirements

Must Have

• 3+ years of experience in email marketing or newsletter management (managing email campaigns from 100K each).
• Experience managing high-volume email programs or multiple newsletters.
• Strong understanding of email KPIs, segmentation, automation, and lifecycle marketing.
• Hands-on experience with email deliverability, sender reputation, authentication, and inbox placement.
• Experience optimizing newsletter engagement and monetization.
• Strong analytical, organizational, and project management skills.
• Excellent QA skills and attention to detail.
• Experience using AI tools to improve marketing workflows.
• English proficiency at C1 level or higher.

Nice to Have

• Experience with Substack, Ghost or similar email platforms.
• Experience with sponsorship, affiliate, or advertising monetization.
• Background in digital publishing or content-led growth.
• Familiarity with email validation tools such as NeverBounce or ZeroBounce.

We're looking for someone who:

• Takes ownership and works independently.
• Thinks strategically and makes data-driven decisions.
• Has a strong commercial mindset.
• Builds scalable processes and continuously improves them.
• Collaborates effectively across teams.
• Pays close attention to detail and quality.
• Thrives in a fast-paced environment.

What We Offer

Professional Growth

• International and multicultural environment.
• Career development opportunities.
• Learning resources and corporate library.
• Opportunity to work with a high-performing team.
• Access to modern tools and AI technologies.

Benefits

• Competitive salary.
• Performance bonuses.
• 21 paid vacation days.
• 14 paid sick leave days.
• Work-life balance.
• Team events and activities.

Working Environment

• Remote or hybrid work.
• Modern office in Warsaw.
• Complimentary snacks and drinks.
• Friendly and supportive team.

We Look Forward to Meeting You!

If you're passionate about building high-performing newsletters and driving measurable business growth through email marketing, we'd love to hear from you.

AllAI is looking for a Content & Social Media Manager to grow our audience and brand awareness through social media, email newsletters, and partner communities.

What you'll do:

• Own the content plan and backlog for social channels
• Publish and test topics, formats, channels, and CTAs
• Launch and run email newsletters
• Monitor AI news, trends, and events
• Engage with AI/tech communities, university communities, event organizers, and partners
• Organize cross-promotion, special offers, and partnership activities
• Analyze results and turn them into new hypotheses

• Work with AI and automating marketing processes that could be automated and scaled.

   

What we're looking for:

• Experience running social media and/or newsletters, ideally in tech/AI or a fast-moving startup
• Interest in AI/tech. If you regularly reading AI news - it's a great fit.
• Comfort working through hypotheses and analytics, not just "posting content"
• Strong written English
• Community-building instincts — you like talking to people, not just publishing at them
• Bonus: experience working alongside automation tools

What success looks like: growing audience, reach and engagement, website traffic, newsletter list, partner network, and brand awareness across B2C and B2B.

Work format: remote, full-time

Domain: Banking & Finance
Experience: 8+ years (ideally 10+)
Project Duration: November 2, 2026 – April 30, 2027
Location: Hybrid, Kraków, Poland

About the Project

We are looking for an experienced Automation Test Engineer with a strong background in banking projects. The role focuses on test automation using Java and Selenium, including backend testing of microservices.

Requirements

• 8+ years of professional experience in test automation, ideally 10+ years.
• Solid experience working on banking projects.
• Strong knowledge of Java and Selenium.
• Experience with backend microservices testing using Java-based frameworks.
• Fluent English.
• Ability to work from the end client's office in Kraków 3–4 days per week.

Nice to Have

• Experience with Playwright.

Tech Stack

• Java
• Selenium
• Microservices
• Playwright (nice to have)

Location 

Hybrid work from Kraków, Poland, with mandatory attendance at the end client's office 3–4 days per week.

Please apply only if you meet the location and office attendance requirements.