SQRD.tech

Location: Remote (Europe)
Experience Level: 5+ years

About the Project
We are looking for a Senior Backend Developer (close to Architect level) to design and build core backend services for the ORA platform. The role is focused on secure cloud integration using KMIP and Barbican, with strong involvement in cryptography, Kubernetes, and open-source technologies.

Key Requirements

Must have:

• Senior-level experience in backend development with Java, Golang, or Python
• Proven hands-on experience in crypto-related projects (clearly visible in CV)
• Strong understanding of cryptography, including TLS and data encryption
• Practical expertise with Kubernetes (infrastructure and management layers)
• Experience working with OpenStack
• Solid background in unit and integration testing
• Experience designing and maintaining distributed systems and core backend services
• English level: Upper-Intermediate / Advanced (C1+)

Nice to have (at least one of):

• Experience with KMIP and key management systems
• Knowledge of Barbican or similar solutions
• Understanding of cloud convergence and ORA architecture
• Experience with microservices scalability and performance optimization
• Familiarity with open standards and open-source integrations

Tech Stack
Java, Golang, Python, Kubernetes, OpenStack, Unit Testing, Integration Testing

Responsibilities

• Design and develop core backend services for ORA
• Integrate with KMS via KMIP (e.g., Barbican, Ceph)
• Build and manage Kubernetes-based infrastructure (CRDs, operators, controllers)
• Implement secure communication using TLS and encryption mechanisms
• Collaborate with architecture and infrastructure teams
• Develop and maintain unit and integration tests
• Participate in architectural decisions and provide technical leadership

Location: Remote (Poland)
Employment Type: b2b
Project Duration: April 2026 – July 2026
Experience Level: 4+ years

Overview
We are looking for a Fullstack Developer with strong backend expertise in Python and FastAPI, along with a good understanding of modern development practices, security, and infrastructure.

Key Requirements

• Solid commercial experience with Python, particularly FastAPI
• Proven experience designing and working with REST APIs
• Strong knowledge of PostgreSQL and relational database design
• Experience with authentication and authorization standards (OAuth2, OIDC, RBAC, SSO)
• Hands-on experience with Docker and Kubernetes
• Familiarity with CI/CD pipelines (GitHub Actions, GitLab CI or similar)
• Understanding of software supply chain security (artifact validation, signature verification, compliance checks, sandboxing)
• Ability to work with cloud, on-premise, or hybrid environments

Nice to Have

• Frontend experience with React, TypeScript, Next.js, or similar SPA frameworks

Tech Stack
Python, FastAPI, REST APIs, PostgreSQL, Docker, Kubernetes, CI/CD

Responsibilities

• Design and develop fullstack features across backend and frontend layers
• Build and maintain backend services using Python (FastAPI)
• Develop scalable data models and system architecture
• Implement secure authentication and authorization mechanisms
• Integrate security practices into the development lifecycle
• Collaborate with DevOps and infrastructure teams to ensure stable and reliable deployments

Location: Warsaw, Poland (hybrid model)
Employment Type: b2b
Project Duration: long-term
Experience Level: 6+ years

Overview
We are looking for a Senior Fullstack Developer with strong hands-on experience across both backend and frontend. The role requires deep expertise in modern Java, microservices architecture, and solid frontend development skills.

Key Requirements

• Strong commercial experience as a Fullstack Developer (backend-only profiles are not considered)
• Senior-level engineer with a hands-on approach (not a managerial role)
• Proven track record working on large-scale systems
• Excellent English communication skills

Backend & Architecture

• Strong experience with Java (versions 17–21, modern approach)
• Solid knowledge of Spring Boot 3.x and microservices architecture
• Hands-on experience with Kafka (event-driven systems)
• Strong SQL skills, especially with Oracle
• Experience with Redis or similar technologies
• Understanding of Domain-Driven Design (DDD)

Frontend

• Experience with Node.js and TypeScript
• Solid experience with Angular (SPA development)
• Strong understanding of frontend architecture and best practices
• Experience building and maintaining Single Page Applications
• Webpack (nice to have)

Security

• Good understanding of web application security principles
• Practical experience with OAuth2 and OIDC
• Familiarity with identity management solutions (nice to have)
• Awareness of OWASP standards

DevOps & Tooling

• Git (required)
• Kafka (required)
• CI/CD: GitLab CI (required), Jenkins (nice to have)
• Maven (nice to have)
• Docker and Kubernetes (nice to have)
• Tools: IntelliJ, VS Code
• Jira and Confluence – working experience

Additional Nice to Have

• Python
• Experience with AI-assisted development tools

Methodologies

• Agile (Scrum, Kanban)
• DevOps mindset
• Experience working in distributed international teams

Soft Skills

• Strong communication and teamwork skills
• Analytical thinking and problem-solving ability
• Proactive and results-oriented mindset
• Ability to work independently on complex tasks
• Continuous learning attitude

Tech Stack
Java (17–21), Spring Boot, Microservices, Kafka, DDD, Node.js

Responsibilities

• Design, develop, and maintain scalable fullstack applications
• Build and enhance microservices-based architecture
• Contribute to frontend development using modern frameworks
• Ensure high code quality, performance, and security
• Collaborate with cross-functional teams in an Agile environment
• Participate in code reviews and technical discussions
• Take ownership of features from concept to delivery

Location: Wrocław, Poland (hybrid, preferred 1–2 days per week in the office)
Employment Type: b2b
Project Duration: long-term
Experience Level: 4+ years

Overview
We are looking for a Senior Software Engineer / Tech Lead with strong Angular expertise and leadership experience. This role combines hands-on development with team coordination and technical ownership.

Key Requirements

• Strong commercial experience with Angular (Senior level)
• Proven background as a Tech Lead or Senior Developer with leadership responsibilities
• Solid understanding of software architecture, clean code principles, and design patterns
• Experience working in Agile/Scrum teams
• Upper-intermediate or higher English level (both written and spoken)
• Strong sense of ownership and accountability

Nice to Have

• Full-stack experience with .NET
• Experience working on enterprise-level systems
• Previous collaboration in international environments
• Exposure to energy, utilities, or industrial domains

Tech Stack
Angular, Agile, Scrum

Responsibilities

Technical Leadership & Delivery

• Ensure high-quality code and adherence to best practices across the codebase
• Review and approve pull requests focusing on performance, maintainability, and security
• Evaluate and challenge technical and business decisions to achieve optimal outcomes
• Identify and communicate potential risks proactively

Team Leadership

• Take ownership of the technical delivery in collaboration with stakeholders
• Define scope and requirements, especially during initial project phases
• Ensure timely delivery aligned with agreed estimates and quality standards
• Mentor and support team members in their day-to-day work
• Distribute tasks and coordinate team activities
• Proactively address and resolve team conflicts
• Share progress updates with other Tech Leads and the Architect

Agile & Collaboration

• Facilitate Agile ceremonies: daily stand-ups, estimations, refinements, sprint planning, retrospectives, demos
• Work closely with QA, UX, and occasionally Mobile teams to ensure end-to-end delivery quality
• Maintain transparent communication with all stakeholders

Project Duration: April 13, 2026 – June 30, 2026
Location: Remote (Poland)
Experience Required: 7+ years

About the Role
We are seeking an experienced UX Designer specializing in Digital Employee Experience to design intuitive, modern intranet and internal communication platforms based on Microsoft SharePoint Online and Microsoft Viva. The role focuses on transforming research insights into user flows, navigation systems, and interactive concepts, while contributing to early-stage product vision and proof-of-concept development.

Key Responsibilities

• Lead UX discovery phases and develop concepts for employee-facing platforms and intranet solutions
• Design information architecture, navigation systems, and user journeys tailored to enterprise users
• Create wireframes, prototypes, and high-fidelity designs aligned with SharePoint and Viva UX standards
• Collaborate with solution architects to ensure feasibility across Microsoft Viva (Connections, Engage, Amplify), Microsoft Teams, and Microsoft Copilot
• Design dashboards, landing pages, and role-based content experiences
• Support personalization strategies, including audience targeting, metadata, and content structuring
• Conduct usability testing and iterate on designs based on feedback
• Work closely with engineering, content, and product teams to align UX with technical and business requirements

Requirements (Must Have)

• 7+ years of experience in UX design
• Proven experience designing enterprise portals, intranets, or internal communication tools
• Strong expertise in information architecture, prototyping, wireframing, and UX research
• Hands-on experience with Microsoft 365 ecosystem, including SharePoint Online and Viva
• Understanding of employee journey mapping and accessibility-first design principles
• Experience collaborating with cross-functional teams (engineering, content, product)
• Fluent English communication skills

Nice to Have

• Experience with SharePoint design systems, component libraries, and Viva UX patterns
• Familiarity with adaptive cards, Microsoft Teams UI, or Copilot-based workflows
• Proficiency with design tools such as Figma, Sketch, or Adobe XD
• Experience working in Agile environments or complex multi-stream programs

Core Technologies
UX Design, Microsoft Office 365, SharePoint

Company
The company specializes in lead generation within the iGaming domain, primarily through SEO-driven solutions. They work on long-term client projects and are currently expanding their internal development team.

Position Overview

We are looking for a Lead / Senior Full-Stack Engineer who operates at a true senior / lead level — not by years of experience, but by depth of expertise and ownership.

This role is for someone who:

• takes full ownership of complex systems
• makes architectural decisions
• builds scalable solutions (not just features)
• sets and raises engineering standards within the team

Location & Format

• Remote
• EU time zone required
• Full-time, long-term cooperation

Language Requirements

• English — required for daily communication
• Strong English is a significant advantage

Team & Projects

You will join a stable team working on long-term lead generation platforms.

This is not a task-execution role. We expect you to:

• take ownership of complex technical decisions
• improve architecture and system performance
• raise the overall engineering bar within the team

Tech Stack

• PHP (Symfony)
• WordPress
• JavaScript
• HTML / CSS

Key Requirements

WordPress (must-have, advanced level)

• Experience building complex, large-scale WordPress systems (not content websites)
• Hands-on experience with WordPress Multisite (production)
• Strong experience with custom plugin development, including:
  • OOP
  • Composer / autoloading
  • Typed properties
• Experience with:
  • custom database structures
  • custom caching strategies (not plugin-based)
  • advanced use of WP_Query
  • improving developer & admin tooling

👉 If your experience is mostly theme customization or plugin usage — this role is not a fit.

PHP (strong senior level required)

• 5+ years with modern PHP (8+)
• Ability to design abstractions, libraries, and internal frameworks
• Experience with:
  • phpcs / phpcbf
  • custom sniffs OR PHPParser / AST
  • reflection & introspection
  • DTOs, Value Objects, clean architecture principles

Frontend / CSS

• Strong modern CSS skills (must-have)
• Understanding of browser rendering, layout, and performance

Performance & Optimization (critical)

• Deep understanding of Core Web Vitals
• Real experience with performance optimization (not just tools/plugins)
• Ability to identify bottlenecks and design custom solutions

Mindset & Approach

We are looking for engineers who:

• think analytically and architecturally
• deeply understand systems, not just tasks
• challenge “working solutions” and improve them
• proactively raise engineering standards

👉 If you mainly execute tasks and rely on predefined solutions — this role is not a fit.

AI Usage

• AI is allowed, but must not be a dependency
• Strong preference for engineers with deep system understanding
• AI-generated communication is discouraged

Start Date

• ASAP

Senior Python Engineer (AI-driven Recommendation Platform, iGaming domain)

About the Product

We are developing an AI-powered performance optimization platform for online casinos and sportsbooks. The solution helps operators improve key business metrics by increasing player engagement and loyalty through personalized recommendations and predictive analytics.

The platform collects and processes player behavior data across multiple systems, builds detailed user profiles, and generates actionable insights, including:

• identifying players who misuse bonus programs without long-term retention
• detecting patterns of risky or excessive gaming to support responsible play
• recommending relevant games and activities based on user preferences and behavioral history

You will join a team building scalable recommendation systems, working with large volumes of data, and implementing ML-driven personalization to enhance user experience within iGaming products.

Requirements

• 5+ years of backend development experience with Python
• Strong foundation in mathematics, statistics, or computer science
• Hands-on experience with FastAPI, Django, or Flask
• Solid knowledge of data structures, algorithms, and distributed systems
• Experience with SQL and NoSQL databases (PostgreSQL, Redis, DynamoDB, MongoDB, etc.)
• Practical experience with Kafka or RabbitMQ and asynchronous architectures
• Cloud experience with AWS (Lambda, S3, RDS, SQS, etc.)
• Experience designing and maintaining high-load, scalable systems
• English level — B2 or higher

Nice to Have

• Experience with recommendation systems, data analysis, or ML-based personalization
• Understanding of data pipelines and ETL processes
• Experience with Kubernetes, Docker, and CI/CD pipelines
• Familiarity with Elasticsearch and monitoring/visualization tools (Grafana, Kibana)

Responsibilities

• Design and develop scalable backend services for AI-powered recommendation systems
• Collaborate with data scientists and ML engineers to deploy models into production
• Optimize data storage, processing, and retrieval for large-scale user datasets
• Ensure system reliability, performance, and scalability
• Take part in architectural discussions, code reviews, and mentoring
• Contribute to new features aimed at increasing player engagement and retention

Tech Stack

Python, FastAPI, Django, Flask, Kafka, RabbitMQ, PostgreSQL, Redis, DynamoDB, AWS (Lambda, S3, RDS, API Gateway, CloudWatch), Kubernetes, Pandas, NumPy, SQLAlchemy, Celery, Elasticsearch, Prometheus, Grafana.

Remote from Poland
Contract duration: April 20, 2026 – December 31, 2026
Experience: 4+ years

About the Role
We are looking for a Data Engineer with strong DevOps and infrastructure expertise to work on building and maintaining scalable data platforms and cloud environments. The role combines data engineering, cloud infrastructure management, and DevOps practices within the Azure ecosystem.

Requirements

Must have:

• Strong understanding of data modeling (data warehouses and transactional systems)
• Hands-on experience with Databricks, Delta Lake, Python, PowerShell, and MS SQL Server / T-SQL
• Experience with Terraform, ARM templates, YAML, and Azure cloud services (App Services, Application Gateway, Azure Firewall, Routing, API Management)
• Solid understanding of distributed systems, Windows Server administration, scaling, disaster recovery, and backup/restore processes
• Familiarity with identity and security protocols (OAuth2, OpenID Connect, Azure Entra ID)
• Experience working with SQL Server, Kusto Query Language, Gremlin Query Language, and Azure Artifacts
• Strong knowledge of Azure data stack: Azure Data Factory, Azure Data Lake, Cosmos DB
• Experience with DevOps practices including CI/CD, testing, monitoring, and optimization of data pipelines
• Proficiency with tools such as Azure DevOps, Git, Visual Studio
• Experience working with Windows and Azure environments
• Agile/Scrum experience

Nice to have:

• Experience with Power BI for data visualization
• Familiarity with SaaS solutions and Managed Identities
• Advanced PowerShell scripting (e.g., DSC)

Tech Stack:
Databricks, Data Lakes, Python, PowerShell, Terraform

Responsibilities

• Design and build data pipelines using Azure Data Factory and Databricks
• Develop and maintain data models for both transactional and analytical use cases
• Work with Azure-based infrastructure (IaaS and PaaS)
• Perform schema evolution and data migrations
• Optimize ETL processes and overall data workflows
• Automate and provision infrastructure using PowerShell, ARM templates, and Terraform
• Maintain and improve existing applications and DevOps infrastructure
• Troubleshoot cloud services and resolve technical issues
• Implement security practices and monitoring across cloud and DevOps environments
• Design and configure network infrastructure and reliability solutions
• Build and maintain CI/CD pipelines in Azure DevOps
• Participate in deployment processes and keep documentation up to date
• Ensure adherence to best practices in operations, backup, scaling, and disaster recovery

Location
Remote (candidates must be based in Poland)

Domain: iGaming / Gambling
Format: Product company
Experience: 5+ years

About the Company

We are an international product company operating in the gambling sector. Our platform delivers real-time personalization for casino and sportsbook products using advanced machine learning. The solution processes live behavioral, transactional, and contextual data to improve player engagement, retention, and overall performance for operators worldwide.

Our focus is on building production-grade ML systems that directly influence what users see in real time — from game recommendations to personalized content and promotions.

Role Overview

We are looking for a Senior Data Scientist to join a product-focused team working on real-time personalization and recommendation systems for iGaming platforms.

This is a hands-on role that combines modeling, experimentation, and close collaboration with engineering and product teams in a high-load, real-time production environment.

Main Responsibilities

• Develop ML-driven features for casino products using supervised learning (regression, ranking, classification)
• Maintain and improve existing recommendation systems in production
• Enhance models using gradient boosting and other supervised approaches
• Perform data cleaning, preprocessing, and feature engineering
• Design and maintain pre- and post-processing workflows
• Optimize training and inference pipelines for performance and reliability
• Integrate ML models into Airflow pipelines in a multi-tenant environment
• Adapt and configure the solution for different clients (tenants)
• Collaborate closely with product and engineering teams on experimentation and feature delivery

As Part of the Team You Will

• Work cross-functionally with data scientists, engineers, product owners, designers, and researchers
• Analyze large-scale datasets to extract insights for product and business decisions
• Propose, implement, and evaluate ML approaches to solve real business problems
• Support and evolve a recommendation solution used across multiple tenants
• Influence product strategy through research, experimentation, and data-driven insights into user behavior

Experience & Education

• 5+ years of professional experience in data science
• Degree in a quantitative field (Mathematics, Statistics, Computer Science, or similar)

Core Skills

• Strong proficiency in Python and SQL
• Hands-on experience with data processing tools (Pandas, Polars)
• Solid engineering skills for building and maintaining scalable ML systems
• Experience implementing observability in ML pipelines (metrics, logging, alerting)
• Knowledge of Docker and Kubernetes
• Strong analytical mindset with the ability to solve loosely defined problems
• Hands-on experience with supervised ML techniques, including:
  • Regression and ranking models (XGBoost, LightGBM, CatBoost, neural networks)
  • Feature engineering and model evaluation (AUC, NDCG, MSE, uplift metrics)
  • Personalization or recommendation systems
• Proven experience deploying ML models to production (near real-time or batch)
• Solid understanding of statistical methods (A/B testing, significance testing)

Nice to Have

• Production experience with large-scale recommendation systems
• Experience with Airflow, Valkey/Redis, FastAPI in production
• Familiarity with contextual bandits or reinforcement learning
• Experience with AutoML tools