April 8, 2026

Senior Fullstack Developer

Senior • Remote

110 - 140 PLN

Warsaw, Poland

Senior Software Engineer – C++

We are looking for a talented Senior Software Engineer to join our team. This role is ideal for someone with deep experience in C++ development, backend skills, and exposure to cloud-native technologies. You will work on challenging projects, contribute to high-impact features, and help shape the future of our products.

What You’ll Do

  • Design, develop, and maintain scalable backend systems in C++ (modern C++ preferred)

  • Work on fullstack applications, including REST API-based backend services

  • Optimize software for performance, concurrency, and memory efficiency

  • Develop and maintain applications in Linux environments

  • Take ownership of technical tasks, delivering high-quality results independently

  • Collaborate closely with cross-functional teams, contributing to design and technical discussions

  • Explore new technologies and expand beyond your primary stack, including Python, Go, and AWS

  • Apply a product-focused mindset, understanding the business impact of your technical decisions

What We’re Looking For

  • 6+ years of hands-on experience in C++ development

  • Solid understanding of multithreading, memory management, and performance optimization

  • Strong experience contributing to complex features with exposure to diverse technologies

  • Proven ability to work effectively in a team and communicate clearly

  • Experience with Linux-based systems and development in Linux environments

  • Self-motivated, independent, and capable of delivering results with limited supervision

  • Bachelor’s degree in Science, Technology, Engineering, or a related field

Nice to Have

  • Experience with Go and/or Python

  • Knowledge of cloud-native development and Infrastructure-as-Code tools (Terraform, CloudFormation)

  • Background in enterprise-scale applications or AWS serverless architectures

  • Familiarity with networking protocols, security best practices, and database systems

  • Experience with modern CI/CD pipelines (GitHub, Jenkins, Artifactory, Ansible)

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Warsaw, Poland

45 - 65 USD/hr

🏢 Summary: B2B remote contract for a Senior C++ Developer to design, build, and enhance high-performance trading and backend platforms. The role focuses on developing scalable, performance-critical systems and improving an existing technology stack in an international environment. Requires daily overlap with the New York time zone. 🗂️ Requirements: 5+ years commercial experience with C++, Strong knowledge of object-oriented programming, Strong knowledge of low-level programming concepts, Experience with multithreading, Understanding of concurrency and synchronization, Experience with sockets and networking, Knowledge of event-driven architectures, Experience with Windows native APIs, Understanding of OS internals, Experience debugging memory leaks, race conditions, deadlocks, stack corruption, Experience with unit testing, Experience participating in code reviews, Experience working with databases 📃 Skills: C++, OOP, LowLevel, Multithreading, Concurrency, Synchronization, Sockets, Networking, EventDriven, Windows, WinAPI, OSInternals, Debugging, Databases, UnitTesting 🏢 Description: We are looking for an experienced Senior C++ Developer to join our client’s engineering team and help build and enhance next-generation trading and backend platforms . This is an opportunity to work on highly scalable, performance-critical systems in an international environment where technology plays a central role in modern financial markets. B2B contract – salary range: $45–65/hour (no paid vacation included) 100% remote job 5–6 hours daily overlap with the New York time zone is required Responsibilities: C++ application development Participate in application design and implementation Enhancement of existing technological platform Identification and resolution of security vulnerabilities Development of back-end services Design and write unit tests Participate in code and design reviews Requirements: 5+ years of commercial experience with C++ Strong knowledge of object-oriented and low-level programming concepts Solid understanding of: multithreading concurrency and synchronization sockets and networking event-driven architectures Windows native APIs and OS internals Experience with debugging complex issues such as memory leaks, race conditions, deadlocks, and stack corruption Good understanding of software engineering best practices, including unit testing and code reviews Experience working with databases Strong analytical and problem-solving skills Ability to work independently and collaboratively within international teams Degree in Computer Science or a related field Nice to Have: Experience in the financial industry, especially Fixed Income Knowledge of Python scripting JavaScript experience Understanding of communication protocols and network programming fundamentals

Technology

Link Group

Senior C# Engineer

Senior

Hybrid

Warsaw, Poland

30,000 - 44,000 PLN

🏢 Summary: The offer is for a Senior C# Engineer responsible for designing, developing, and optimizing distributed, high-volume, service-oriented applications using modern .NET technologies. The role involves end-to-end project ownership, working with cloud platforms, databases, messaging systems, and DevOps tools to deliver scalable and reliable solutions. The position requires strong expertise in enterprise-level development and building business-critical systems. 🗂️ Requirements: 5+ years of enterprise-level C#/.NET development experience, Experience with distributed and high-volume applications, Strong knowledge of object-oriented design, Experience with multi-threading, Experience with service-oriented architecture, Experience with cloud platforms (AWS or Azure), Experience with relational databases, Experience with distributed caching systems, Experience with messaging systems, Experience with DevOps tools, Experience working in Agile environments, Experience with test-driven development 📃 Skills: C#, .NET, AWS, Azure, SQL, Postgres, Snowflake, Redis, Kafka, Solace, Git, Jenkins, JIRA, Octopus, OOP, Multithreading, SOA, TDD 🏢 Description: Senior C# Engineer Join our tech team and play a key role in building and maintaining business-critical systems! We’re looking for a Senior C# Engineer with experience in distributed, high-volume applications and modern .NET technologies. What you’ll do: Design, develop, and optimize multi-threaded, service-oriented applications Own projects end-to-end, from development to deployment Collaborate with global teams to deliver robust, scalable solutions Support and improve core systems while introducing strategic enhancements What we’re looking for: 5+ years in enterprise-level C#/.NET development Strong skills in object-oriented design, multi-threading, and service-oriented architecture Experience with cloud platforms (AWS/Azure), databases (SQL/Postgres/Snowflake), and distributed caching (Redis) Familiarity with messaging systems (Kafka/Solace) Knowledge of DevOps tools (Git, Jenkins, JIRA, Octopus Deploy) Agile mindset and passion for quality, test-driven development, and problem-solving

Technology

EPAM Systems

Senior C Software Engineer

Senior

Remote

Gdansk, Poland

🏢 Summary: The offer is for a Senior C++ Software Engineer responsible for transforming machine learning prototypes into high-performance, production-grade C++ systems running on resource-constrained hardware or scalable cloud environments. The role focuses on real-time, low-latency development, optimization, and deployment of reliable applications in Linux environments. It involves close collaboration with Data Scientists and support for CI/CD, containerization, and cloud or edge deployments. 🗂️ Requirements: 5+ years of experience in modern C++ development (C++17/C++20), Strong knowledge of multithreading, concurrency and synchronization in Linux, Experience developing deterministic, low-latency real-time systems, Proficiency with CMake and Conan package management, Experience profiling and optimizing CPU and memory usage in constrained environments, Experience writing unit and automated tests, Ability to debug low-level communication and performance issues, Hands-on experience with Docker in Linux production environments, Experience with CI/CD and release pipelines, Familiarity with Agile tools (Azure DevOps, JIRA, Confluence, Bitbucket), Fluent English (B2+ level) 📃 Skills: C++, C++17, C++20, Linux, Multithreading, Concurrency, CMake, Conan, Docker, CI/CD, AzureDevOps, JIRA, Confluence, Bitbucket, Python, MQTT, ZeroMQ, ProtoBuf, Kafka, HTTP, Bash, Kubernetes, TCP/IP, systemd 🏢 Description: We are seeking a Senior C Software Engineer to collaborate with Data Scientists and Machine Learning experts in transforming prototype algorithms into hardened, reliable, production-grade applications. In this role, you will convert research workflows into high-performance C++ systems capable of running on resource-constrained hardware or scalable cloud environments. Responsibilities Collaborate closely with Data Scientists and Machine Learning experts to turn prototype algorithms and data processing pipelines into hardened, reliable, production-grade "always-on" applications written in C++ Conversion of research and prototype ML/data-processing workflows (primarily Python-based) into high-performance, reliable C++ production systems Implementation of data quality safeguards, sanitization and required low-level interfaces for real-time inference on streaming data Optimization of code for predictable behavior, high reliability and efficient resource utilization (compute/memory/storage) on resource-constrained environments Support the development of high-performance, high-reliability solutions capable of running on resource-constrained hardware or in cost-effective, highly-scalable cloud applications Translation of real-world process dynamics, sensor behavior and system constraints into realistic online control solutions Documentation and communication of assumptions, results, limitations, risks and deployment considerations for discussion with the broader technical audience Requirements 5+ years of experience in modern C++ software development using C++17/C++20 Understanding of multithreading, concurrency, synchronization and performance optimization in Linux environments Background in developing deterministic, low-latency software for real-time systems Proficiency in CMake, modern C++ build systems and Conan package management for C++ Skills in profiling and optimizing CPU/memory utilization in constrained Linux environments Competency in writing unit tests and automated tests Proven capability to debug low-level communication issues and optimize performance under constrained environments Hands-on expertise designing, deploying and debugging containerized applications using Docker in Linux production environments Experience with CI/CD & Release pipelines: multi OS runners, artifact signing, SBOMs/vulnerability scanning Familiarity with Agile toolsets such as Azure DevOps, Atlassian tools like Confluence, JIRA and Bitbucket Fluent English communication skills at a B2+ level Nice to have Capability to independently deploy and manage cloud-native or edge-native microservices in Linux environments Flexibility to work closely with research, data science and platform engineering teams to bridge prototype and production environments Skills in Python and C++ interoperability Familiarity with industry IoT standards and protocols such as MQTT/SparkplugB, ZeroMQ, ProtoBuf, Kafka and HTTP Expertise in Linux, Bash/Shell scripting, Docker, TCP/IP networking, Kubernetes, systemd, logging, OTA/rollback strategies and advanced debugging techniques Background in deploying software in industrial environments, including remote diagnostics and field support Familiarity with .NET/C# We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.