OPTIVEUM sp. z o.o.

Develop and maintain backend services and APIs using .NET and C# while collaborating with teams and ensuring quality through testing and code reviews. | Strong hands-on experience with .NET, C#, MS SQL, and Microsoft Azure ecosystem, fluent English, and ability to work in international B2B environment. | Senior .NET Backend Engineer Location: 100% Remote (Poland) Rate: Up to 35 EUR/h (B2B) Mode of work: 100% Remote About the role: We are looking for a Senior, backend-focused .NET Engineer based in Poland to join our international client's team. You will work closely with technical colleagues and stakeholders to develop and maintain backend capabilities that support specialized, scientific workflow management systems. Please note: Optiveum acts as the recruitment and contracting party for this role. You will sign a B2B cooperation agreement directly with us. What you will be doing: Develop and maintain backend services and APIs using .NET and C#. Design and implement reliable data access and persistence solutions using MS SQL. Contribute to a secure and maintainable application architecture. Collaborate with product, frontend, and domain colleagues to translate user needs into effective technical solutions. Support engineering quality through testing, code reviews, troubleshooting, and continuous improvement. Contribute to delivery and deployment practices within the Azure ecosystem. What we are looking for: Strong, hands-on experience with .NET and C#. Solid MS SQL skills, including working with relational data models and queries. Experience in developing or operating solutions in Microsoft Azure. Fluent English (B2B/international environment). Nice to have: Experience with Microsoft Entra ID (Azure Active Directory). Experience with GitHub pipelines and CI/CD practices. Experience with Vue 3 (frontend experience is not essential but will be considered a strong advantage).

Manage production incidents, perform root cause analysis, ensure production stability, oversee CI/CD deployments, maintain documentation, and collaborate with development teams. | 5+ years IT operations or application support experience, 2+ years ITIL, proficiency with monitoring tools, Kubernetes, Linux, databases, and advanced English communication. | Senior Application and Operation Support Engineer Location: Łódź, Gdańsk, Warsaw, or Tricity Work Model: Hybrid (25% remote) Rate: Up to 110 PLN/h (B2B) Contracting Party: Optiveum About the Role We are Optiveum, and we are currently looking for an experienced Senior Application and Operation Support Engineer to join our client's team. In this role, you will be crucial in ensuring the stability, performance, and continuous improvement of production and pre-production environments. You will sign a B2B cooperation agreement directly with Optiveum. Your Responsibilities Incident & Problem Management: Own the RCA process for production incidents—diagnose, resolve, and implement preventive measures. Production Monitoring & Support: Continuously monitor service health, detect anomalies early, and proactively prevent incidents. Deployment Execution: Trigger and oversee release deployments through existing CI/CD pipelines; troubleshoot failures and coordinate rollbacks when necessary. Environment Oversight: Maintain the stability and alignment of Pre-Production and Production environments. Runbook & Knowledge Management: Document operational procedures, known issues, and resolution steps to build a reliable team knowledge base. Operational Improvement: Identify recurring pain points and propose automation to reduce manual toil. Improve observability coverage (dashboards, alerts, log queries) and contribute to disaster recovery drills. Cross-team Collaboration: Work closely with development and platform teams to triage issues, clarify requirements, and close the feedback loop between production and development. Must-Have Requirements 5+ years of experience in IT operations, application support (L2/L3), or a similar production-facing role. Proven track record of owning incidents end-to-end (from alert to RCA to prevention). 2+ years of experience working within an ITIL framework (incident, problem, change management). Experience working in Agile delivery environments alongside development teams. Advanced English communication skills, with the ability to explain technical issues clearly to both engineers and non-technical stakeholders. Technical Skills Required Monitoring & Observability: Proficiency with Splunk, Apica, Sysdig, Prometheus, and Grafana (reading dashboards, tuning alerts). Infrastructure: Comfort operating services on Kubernetes and Linux CLI (e.g., checking pod health, reading logs, triggering restarts). CI/CD & Version Control: Familiarity with Jenkins pipelines for deployments and troubleshooting, and proficiency in GIT. Application & Data Layer: Experience with relational databases (Oracle, DB2)—querying, interpreting execution plans, and troubleshooting data incidents. Architecture Knowledge: Working knowledge of Spring/Hibernate behavior, Kafka message flows, and XML/JSON payloads to trace issues through the stack. Nice-to-Have Experience with Helm deployments. Java/J2EE development background (highly beneficial for reading stack traces and collaborating with devs). Operational experience with IBM DataStage. Scripting skills (Bash, Python) for automating repetitive tasks. Knowledge of Ansible for applying configuration changes.

Deliver and own high-value features across mobile, web, and AI-enabled product surfaces from framing through production. | Solid TypeScript/JavaScript fundamentals with production experience in Node, Go, and Python microservices on GCP, familiarity with LLM concerns, agentic workflows, and media-heavy consumer product development. | Mid/Senior AI-Native Full-Stack Engineer Optiveum is looking for a talented Mid/Senior Full-Stack Engineer for a long-term, engaging project. The cooperation is based on a B2B contract directly with Optiveum, with an immediate start (ASAP). The Client You will be working for a US-based technology company building a live social platform for authentic connection and an emerging multimodal intelligence business for audience understanding. While the client operates in the US time zone, your work will be highly asynchronous with only occasional meetings required. The Role As an AI-Native Full-Stack Engineer, you will deliver features across mobile, web, backend, and AI-enabled product surfaces. Depending on your experience level, you will either independently deliver bounded vertical slices of the product or own meaningful product outcomes while improving architecture and mentoring a small, fast-paced team. What you will do Deliver and own high-value features from problem framing through production across React Native, Next.js, NestJS, TypeScript, Go and Python microservices, and GCP. Diagnose and improve real product workflows spanning UI, APIs, data, media, background processing, and third-party services. Strengthen the media lifecycle—including capture, upload, processing, playback, analysis, retrieval, and failure recovery—across mobile and web. Evolve AI-assisted transcription and audio/video analysis with explicit quality measures, observability, privacy, and cost controls. Use AI as an active engineering partner throughout discovery, design, implementation, testing, debugging, review, and documentation. Write maintainable code, focused tests, useful instrumentation, and concise documentation. What we expect Solid TypeScript/JavaScript fundamentals and experience delivering production mobile or web applications. Production depth in TypeScript/Node and ability to read, extend, and troubleshoot Go and Python microservices on GCP. Working knowledge of APIs, data modeling, asynchronous workflows, testing, source control, and cloud deployment. Familiarity with production LLM concerns such as context design, structured outputs, grounding, latency, cost, and privacy. Experience with agentic workflows, structured tool use, MCPs, and evaluation. Clear written and spoken English, dependability in a remote team, and readiness to be candid about unknowns. Experience with media-heavy consumer products, social/community systems, creator platforms, or moderation is a major plus. Gemini or Vertex AI experience on GCP is a strong advantage, though equivalent production experience with other model platforms also counts. What is offered Salary: 125 - 130 PLN net/h Contract: B2B (Contracted directly with Optiveum) Start: ASAP, long-term project Location: 100% Remote from Poland Working hours: Full-time (Flexible, occasional US time zone meetings)

Own and deliver features across mobile, web, and backend while improving product workflows and leveraging AI tools. | Solid TypeScript/JavaScript fundamentals, production Node.js experience, React Native or Next.js knowledge, cloud deployment, microservices, and ability to troubleshoot Go and Python. | Mid/Senior Full-Stack Engineer Optiveum is looking for a Mid/Senior Full-Stack Engineer for a long-term, engaging project. The cooperation is based on a B2B contract directly with Optiveum, starting ASAP. The Client You will be working for a US-based technology company that builds a live social platform connecting communities through video, audio, text, and photos, alongside an emerging multimodal intelligence platform that helps brands understand public conversations and audience sentiment. The Role This is a high-ownership role for a capable generalist who wants to ship across mobile, web, and backend product surfaces. You will own high-value features from problem framing through production while leveraging AI tools to accelerate your development workflow. While the client operates in the US, the team works highly asynchronously, requiring only occasional meetings to align. What you will do Deliver and own features across React Native, Next.js, NestJS, TypeScript, Go and Python microservices, and GCP. Diagnose and improve real product workflows spanning UI, APIs, data, media, background processing, and third-party services. Strengthen the media lifecycle—including capture, upload, processing, playback, analysis, retrieval, and failure recovery—across mobile and web. Use AI tools (e.g., Gemini, ChatGPT) as an active engineering partner for coding, testing, debugging, and documentation—verifying outputs rather than relying on it as a simple answer machine. Write maintainable code, focused tests, useful instrumentation, and concise documentation. Expectations Solid TypeScript/JavaScript fundamentals with substantial experience delivering and operating customer-facing mobile or web applications. Production depth in Node.js and at least one major product surface (such as React Native or Next.js). Working knowledge of APIs, data modeling, asynchronous workflows, testing, and cloud deployment (GCP preferred). Ability to read, extend, and troubleshoot Go and Python microservices. Clear written and spoken English, dependability in a remote team, and a direct, low-ego approach to problem-solving. Nice to have: Experience with media-heavy consumer products, social/community systems, creator platforms, or in-app purchases. What is offered Salary: 125 - 130 PLN net/h (Please note: The final B2B contract will be signed in USD at the current exchange rate). Contract: B2B directly with Optiveum. Start: ASAP, long-term project. Type of work: 100% Remote from Poland. Working hours: Full-time, flexible hours (occasional late afternoon/evening meetings required for US time zone alignment).

Design and build robust data models and pipelines to unify fragmented systems and lead technical implementation. | Advanced experience with Snowflake, dbt, Airflow, large-scale data warehousing, strategic maintainability mindset, and fluent English. | Senior Data Engineer (Snowflake) Location: Hybrid (4 days in the office, 1 day remote) – Warsaw or Gdańsk Salary: up to 180 PLN / hour (B2B) Company: A prominent player in the banking industry. About the Role: You will be joining the Corporate Credit unit, specifically within the Limit Management technology team. This team builds and maintains the core digital solutions that drive corporate credit decisions across the bank, ensuring real-time limit checks, regulatory compliance, and risk monitoring. We are looking for a highly skilled and proactive Senior Data Engineer to support the foundational phase of a new data engineering team and build scalable data solutions from scratch. Key Responsibilities: Take full, end-to-end ownership of designing and building robust data models and data pipelines. Drive the modernization process, transitioning from fragmented local systems to a unified, modern data solution. Act as a bridge between business stakeholders and the engineering team, proactively translating complex business problems into actionable data solutions. Drive quality and technical leadership by setting high delivery standards and championing modern engineering practices (TDD, design patterns, clean architecture). Pioneer AI adoption by implementing AI-assisted development practices (e.g., GitHub Copilot, internal agents) to improve engineering speed and productivity. Requirements: Strong, proven experience in data engineering and building large-scale modern data warehousing solutions. Hands-on, advanced experience with Snowflake, dbt, and Airflow. Solid experience with CI/CD, pipeline orchestration, and modern data engineering practices. A strategic mindset: you prioritize long-term maintainability over short-term fixes and understand what "good" looks like in data architecture. A "natural investigator" approach—you don't wait for detailed specifications but proactively explore the business domain to clarify requirements. Fluent English (Advanced/C1) for seamless communication with international stakeholders. Nice to have: Experience with DB2. What We Offer: Salary: up to 180 PLN net + VAT per hour. Contract: B2B. Work Model: Hybrid (4 days from the office, 1 day from home) located in either Warsaw or Gdańsk. Impact: The opportunity to act as a foundational member of a newly formed team, shaping the data architecture and processes from the ground up. Innovation: A dynamic environment where you are encouraged to use the newest AI tools to enhance your daily work.

Design and implement automation and advanced system administration within a SAFe SCRUM framework. | Requires strong RHEL 8+ expertise, RHCSA or equivalent, Ansible, Bash/Python proficiency, and Agile experience. | Senior Red Hat / Linux Engineer Location: Warsaw (PL) Work Model: Hybrid (3 days in the office per week) Rate: Up to 160 PLN/h net B2B About the Role At Optiveum, we connect top IT professionals with exciting tech initiatives. By joining us, you will be employed directly by Optiveum and outsourced to work on a highly specialized project for our partner—a leading client in the banking industry. We are seeking an experienced Senior Red Hat / Linux Engineer to join an innovative technology team. This role offers the opportunity to work with cutting-edge automation technologies and contribute to the platform's continuous improvement through modern DevOps practices. Responsibilities Design and implement automation processes using CI/CD technologies and procedures. Explore and integrate AI technologies for self-healing platform capabilities. Create comprehensive documentation for automation processes and procedures for end-users, engineers, and architects. Collaborate effectively within a SAFe SCRUM framework. Provide advanced troubleshooting and system administration support. Drive innovative solutions to complex technical challenges. Must-Have Skills & Experience Strong expertise in Red Hat Enterprise Linux (RHEL) 8+ environments. Red Hat Certified System Administrator (RHCSA) OR extensive hands-on experience with Red Hat 8+. Red Hat Satellite patch management and automation. Experience with Google Compute Engine (GCE) and migrating from VMware to GCE. High proficiency in Bash scripting and dynamic programming languages (Python, Perl). Extensive experience with configuration management tools, particularly Ansible. Proficiency with software development tools including Git and Jira. Advanced troubleshooting and problem-solving capabilities. Experience working within SCRUM/Agile methodologies (SAFe SCRUM preferred). Fluent English, both written and spoken. Nice-to-Have Skills Experience with VMware virtualization technologies. Knowledge of network administration and configuration. Familiarity with Windows system integration.

Design and maintain scalable data models and technical solutions to support credit and financial data processes. | Requires extensive experience in data modelling, solution design, strong SQL and Python skills, and advanced English proficiency. | Senior Data Engineer (Data Modelling & Python) Location: Gdańsk / Gdynia or Warsaw (PL) Work Model: Hybrid (2 days in the office; 3 days starting in September) Rate: Up to 150 PLN/h net B2B About the Role At Optiveum, we connect top IT professionals with exciting tech initiatives. By joining us, you will be employed directly by Optiveum and outsourced to work on a highly specialized project for our partner—a leading client in the banking industry. We are looking for an experienced Senior Data Engineer with a strong focus on Data Modelling and Python to design scalable technical solutions and maintain complex data models that support vital credit and financial data processes. Responsibilities Design and maintain data models supporting credit and financial data processes. Analyze business requirements and translate them into scalable technical solutions. Define and manage data mappings between multiple systems to ensure accurate data integration and transformation. Ensure data quality, consistency, traceability, and auditability across the solution landscape. Collaborate with business stakeholders, architects, and development teams on end-to-end solution design. Prepare and maintain technical documentation and functional specifications. Support process optimization and automation using AI-assisted tools. Participate in solution implementation, testing, and continuous improvement activities. Must-Have Skills & Experience Extensive experience in Data Modelling and Solution Design. Strong SQL skills and hands-on experience with Relational Databases. Good programming skills in Python. Experience with data integration, transformation, and data mapping across multiple systems. Understanding of APIs, system integrations, and process modelling. Experience ensuring data quality, consistency, and governance standards. Strong analytical and problem-solving skills. Experience working directly with business stakeholders and translating business requirements into technical solutions. Fluent English, both written and spoken (Advanced level). Nice-to-Have Skills Experience in banking, finance, or regulatory reporting environments. Knowledge of credit risk, rating, or financial statement data domains. Understanding of Data Warehouse (DWH) concepts and architecture. Knowledge of Kafka. Experience with Power BI. Familiarity with Java development. Experience using AI tools for documentation, testing, data analysis, or development support.