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Senior Back-End Security Developer at Sigma Software
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Back End Development, Security, Cryptography, Api Development, Python, Go, Rust, C++, Restful Api, Authentication, Authorization, Audit Logging, Threat Modeling, Code Reviews, Hsm Integration, Secret Management, Security Analysis
Specialization
5+ years of back-end development experience with strong proficiency in Python and/or Go, Rust, or C++. Solid understanding of cryptographic principles and experience with RESTful API design is required.
Experience Required
Minimum 5 year(s)
Rituals Advisor / pomoc świąteczna - Zamość, Galeria Twierdza at Rituals
Zamość, Lublin Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Problem Solving, Attention To Detail, Organization, Sales, Communication, Relationship Building
Specialization
The ideal candidate is energetic, humble, and possesses a sense of humor, with strong relationship-building skills. Experience in retail or hospitality, a customer-focused attitude, and the ability to make decisions and solve problems are essential.
Full Stack Engineer at Zeelo
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Typescript, Node.Js, Aws, React, Graphql, Rest, Trpc, Pulumi, Ci/Cd, Automated Testing, Postgresql, Dynamodb, Event Driven Design, Monorepos, Clean Code, Collaboration
Specialization
The ideal candidate should have deep TypeScript expertise and strong frontend skills in React. A practical understanding of AWS serverless architecture and experience with modern build tools is also required.
Experience Required
Minimum 5 year(s)
Wsparcie pracy sklepu Biedronka I Wierzchosławice Wsparcie pracy sklepu at Jerónimo Martins
Wierzchosławice, Lesser Poland Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Physical Work, Engagement
Specialization
Candidates must be at least 18 years old and enjoy working with people in a team environment. They should be prepared for physical work and demonstrate commitment and a collaborative attitude.
Sprzedawca Kasjer / Lada Tradycyjna Biedronka I Wola Rakowa Sprzedawca at Jerónimo Martins
Wola Rakowa, Łódź Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Physical Work, Cash Handling, Product Display, Price Checking, Store Cleanliness, Bread Baking
Specialization
Candidates should enjoy working with people and be ready for physical work in shifts, including weekends. Engagement and teamwork are essential qualities for applicants.
Sprzedawca JYSK Rybnik, 1/2 etatu (2600 PLN) at JYSK
Rybnik, Silesian Voivodeship, Poland - Full Time
Skills Needed
Sales, Customer Service, Communication Skills, Team Collaboration, Goal Orientation, Flexibility, Initiative, Learning Agility
Specialization
We expect openness to others, initiative, and the ability to provide the best customer experience. You should have good communication skills and a willingness to learn and improve your qualifications.
Controller within Service Delivery at H&M Group
Gądki, Greater Poland Voivodeship, Poland - Full Time
Skills Needed
Budget Management, Financial Compliance, Vendor Management, Invoice Handling, Controlling, Service Delivery, Continuous Improvement, Stakeholder Management, Financial Evaluations, Business Cases, Change Management, Operational Efficiency, Communication, Adaptability, Proactive Solution Development
Specialization
Candidates should have experience in budget creation and management, as well as proficiency in invoice handling and vendor management. A degree in Accounting, Finance, Business Administration, or equivalent is required, along with a mindset for continuous improvement.
Experience Required
Minimum 5 year(s)
SaaS Sales Representative (Commission-based) at Penguin Formula
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
B2b Saas, Compliance, Legal Tech Sales, Fluent In Italian, Strong English Proficiency, Gdpr, Nis2, Dora, Privacy Regulations, Entrepreneurial, Self Driven, Client Relationships
Specialization
Proven experience in B2B SaaS, compliance, or legal-tech sales is required, along with fluency in Italian and strong English proficiency. Familiarity with GDPR, NIS2, DORA, or privacy regulations is a strong plus.
Experience Required
Minimum 2 year(s)
Asystent ds. Technicznej Obsługi Klienta Laboratoryjnego at Eurofins
Łódź, Łódź Voivodeship, Poland - Full Time
Skills Needed
Polish Language, English Language, Task Prioritization, Teamwork, Time Management, Microsoft Office
Specialization
Candidates should have advanced proficiency in Polish and communicative English. A degree in relevant fields such as chemistry or biology is preferred, along with good organizational skills.
Senior Administration & Workplace Specialist at CD PROJEKT RED
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Office Administration, Workplace Operations, Problem Solving, Planning Abilities, Cross Functional Collaboration, Polish Proficiency, English Proficiency, Supplier Negotiation, Space Planning, Procurement, Vendor Management, Invoice Processing, Internal Ticketing System Management, Canteen Operations, Renovation Project Management, Architectural Familiarity, Interior Design
Specialization
Candidates should have a minimum of 5 years of experience in office administration or workplace operations, with proven problem-solving and planning abilities. Proficiency in Polish and English is required, along with a willingness to work primarily on-site in Warsaw.
Experience Required
Minimum 5 year(s)
Mobilny przedstawiciel handlowy w branży samochodowej at AUTO1 Group
Gdynia, pomorskie, Poland - Full Time
Skills Needed
Communication, Sales, Customer Relationship Management, Organization, Negotiation, Problem Solving
Specialization
A passion for the automotive industry and excellent communication skills are essential. Being organized and motivated by competition will help you succeed in this role.
Kierownik Sklepu JYSK Miłków k.Karpacza -nowa lokalizacja (7500 PLN) at JYSK
Miłków, Lower Silesian Voivodeship, Poland - Full Time
Skills Needed
Team Management, Customer Service, Sales Performance, Communication Skills, Decision Making, Problem Solving, Recruitment, Training, Leadership, Motivation, Time Management, Adaptability, Retail Experience, Goal Orientation, Dynamic Environment
Specialization
Candidates should have proven experience in team management and a strong focus on achieving results. Effective communication skills and the ability to work under pressure are essential.
Experience Required
Minimum 2 year(s)
Staff ML & AI Scientist at Visa
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Machine Learning, Deep Learning, Statistical Analysis, Python, Data Science, Neural Networks, Transformers, Graph Neural Networks, Natural Language Processing, Mlops, Model Interpretability, Big Data, A/B Testing, Financial Data, Model Validation, Custom Algorithms
Specialization
Candidates should have an MS or PhD in a quantitative discipline with strong machine learning and deep learning skills. Preferred qualifications include 7+ years of experience, proficiency in Python, and hands-on experience with deep learning models and big data tools.
Experience Required
Minimum 5 year(s)
Manager.Finance & Accounts.Aster Office - Jordan at Aster DM Healthcare
Jordanów, Lesser Poland Voivodeship, Poland - Full Time
Skills Needed
N/A
Specialization
Candidates should have a strong background in finance and accounting principles. Relevant experience in a managerial role is preferred.
Experience Required
Minimum 5 year(s)
Rituals Advisor / pomoc świąteczna - Wrocław, Magnolia Park at Rituals
Wrocław, Lower Silesian Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Problem Solving, Attention To Detail, Organization, Sales, Communication, Relationship Building
Specialization
The ideal candidate is energetic, humble, and possesses a sense of humor, with strong relationship-building skills. Experience in retail or hospitality, a customer-focused attitude, and problem-solving abilities are essential.
Client Onboarding Intermediate Analyst with Spanish at Citi
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Client Onboarding, Documentation Review, Customer Service, Project Management, Interpersonal Skills, Communication Skills, Organizational Skills, Attention To Detail, Microsoft Office, Spanish, English, Team Player, Independence, Problem Solving, Risk Management, High Volume Environment, Time Management
Specialization
Candidates should have 3-5 years of experience in documentation review and client onboarding within financial institutions. Proficiency in English and Spanish is required, with additional languages being a plus.
Experience Required
Minimum 2 year(s)
Specjalista ds. Aplikacji Biznesowych at FLEX LTD - USA
Tczew, Pomeranian Voivodeship, Poland - Full Time
Skills Needed
Erp, Mes, Sql, Api, Edi, Business Processes, Analytical Skills, Teamwork, Technical Solutions, Documentation, Reporting, User Support, System Integration, Problem Solving, Continuous Improvement
Specialization
Candidates should have knowledge of ERP and MES systems, as well as SQL skills. A degree in a related field and the ability to communicate in English are also required.
Area Sales Manager at Docplanner
Warszawa, Pomeranian Voivodeship, Poland - Full Time
Skills Needed
B2b Sales, Client Acquisition, Relationship Building, Listening Skills, Objection Handling, Kpi Management, Saas Knowledge, Technology Proficiency, Medical Industry Knowledge
Specialization
Candidates should have a minimum of 2 years of experience in B2B sales and client acquisition. Understanding client needs and effective communication skills are essential, along with experience working towards KPIs.
Experience Required
Minimum 2 year(s)
Lead Specialist Procurement HNC at DSM
Buk, West Pomeranian Voivodeship, Poland - Full Time
Skills Needed
Purchasing, Sourcing, Supplier Relationships, Data Management, Cross Functional Collaboration, Sap, Trackwise, Raw Material Qualifications, Ms Office, Project Participation
Specialization
Candidates should have 2-3 years of purchasing experience and be fluent in English. A higher education background in business administration, commerce, or engineering is preferred, along with experience in cross-functional projects.
Experience Required
Minimum 2 year(s)
Senior Associate, Fund/Client Accounting at BNY
Wrocław, Lower Silesian Voivodeship, Poland - Full Time
Skills Needed
Fund Accounting, Private Equity, Credit Funds, Financial Reporting, Audit, Reconciliations, Leadership, Interpersonal Skills, Gaap, Ifrs, Service Improvement, Cash Reconciliations, Asset Reconciliations, Performance Reporting, Geneva, Investran
Specialization
A bachelor's degree in accounting or equivalent experience is required, along with 5 years of relevant work experience. Prior experience with Private Equity and Credit Funds is advantageous.
Experience Required
Minimum 5 year(s)
Senior Back-End Security Developer at Sigma Software
Warsaw, Masovian Voivodeship, Poland -
Full Time


Start Date

Immediate

Expiry Date

10 Feb, 26

Salary

0.0

Posted On

12 Nov, 25

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

No

Skills

Back-End Development, Security, Cryptography, API Development, Python, Go, Rust, C++, RESTful API, Authentication, Authorization, Audit Logging, Threat Modeling, Code Reviews, HSM Integration, Secret Management, Security Analysis

Industry

Software Development

Description
Company Description We’re looking for a Senior Back-end Engineer with a strong background in security to help build a next-generation confidential computing system from the ground up. You’ll design cryptographic infrastructure, develop Back-end services and APIs, and shape the core platform architecture. Working with HSMs, TEEs, and enterprise-grade cryptography, you’ll operate at the intersection of Back-end engineering and cybersecurity. If you’re eager to build secure, high-performance systems that redefine data protection, join us to shape the future of confidential computing! CUSTOMER Our Сustomer is at the forefront of AI and high-performance computing, building next-generation GPU infrastructure to power advanced AI/ML workloads, data analytics, and research. Their team has decades of hands-on experience with high-performance distributed systems, ranging from creating early distributed clusters at NASA to scaling infrastructure for global leaders such as Google, Microsoft, CoreWeave, and Yahoo!/AOL. They know the challenges developers face because they’ve experienced them, and they’re determined to improve the situation. PROJECT Today, they’re redefining AI infrastructure by putting control and efficiency back into the hands of developers. With the latest GPUs, exceptional reliability, and transparent, fair pricing, they’re making powerful AI more accessible and enjoyable to use. Their mission is simple yet bold: great AI developers deserve great AI infrastructure. By empowering creators with the necessary tools, they’re paving the way for real breakthroughs in artificial intelligence, and they’re just getting started. Job Description Design and build high-performance, secure Back-end services for our vault and key management infrastructure Develop cryptographic workflows, including key generation, rotation, and secure storage mechanisms Build robust APIs with comprehensive authentication, authorization, and rate limiting Write clean, maintainable, and well-tested code with security as a primary consideration Implement comprehensive audit logging and monitoring for security-critical operations Collaborate with the security team on threat modeling and security reviews Participate in code reviews with a focus on security best practices Create technical documentation for internal systems and API endpoints Integrate with Hardware Security Modules (HSMs) and cloud KMS services Implement secure secret management and rotation mechanisms Build defense-in-depth security controls across all services Conduct security analyses of third-party dependencies Participate in security audits and penetration testing remediation Qualifications 5+ years of Back-end development experience, building production systems Strong proficiency in Python (FastAPI, Django, or Flask) and/or Go, Rust, C++ Solid understanding of cryptographic principles, including symmetric and asymmetric encryption, hashing, key derivation and digital signatures Experience with RESTful API design and development Understanding of authentication and authorization patterns (OAuth 2.0, JWT, and mTLS) Upper-Intermediate level of English Will be a plus: Experience with Trusted Execution Environments, such as Intel TDX, NVIDIA Confidential Computing, or Secure VMs Experience with Git, CI/CD pipelines, and modern development workflows Additional Information PERSONAL PROFILE Ability to adapt and thrive in ambiguous and fast-moving startup environments Strong problem-solving skills and the ability to diagnose complex security workflows Excellent communication skills and the ability to collaborate with DevOps, AI, and cloudengineering teams Detail-oriented mindset to ensure high availability and reliable services
Responsibilities
Design and build high-performance, secure back-end services for vault and key management infrastructure. Collaborate with the security team on threat modeling and security reviews.
Senior Back-End Security Developer at Sigma Software
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Back End Development, Security, Cryptography, Api Development, Python, Go, Rust, C++, Restful Api, Authentication, Authorization, Audit Logging, Threat Modeling, Code Reviews, Hsm Integration, Secret Management, Security Analysis
Specialization
5+ years of back-end development experience with strong proficiency in Python and/or Go, Rust, or C++. Solid understanding of cryptographic principles and experience with RESTful API design is required.
Experience Required
Minimum 5 year(s)
Rituals Advisor / pomoc świąteczna - Zamość, Galeria Twierdza at Rituals
Zamość, Lublin Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Problem Solving, Attention To Detail, Organization, Sales, Communication, Relationship Building
Specialization
The ideal candidate is energetic, humble, and possesses a sense of humor, with strong relationship-building skills. Experience in retail or hospitality, a customer-focused attitude, and the ability to make decisions and solve problems are essential.
Full Stack Engineer at Zeelo
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Typescript, Node.Js, Aws, React, Graphql, Rest, Trpc, Pulumi, Ci/Cd, Automated Testing, Postgresql, Dynamodb, Event Driven Design, Monorepos, Clean Code, Collaboration
Specialization
The ideal candidate should have deep TypeScript expertise and strong frontend skills in React. A practical understanding of AWS serverless architecture and experience with modern build tools is also required.
Experience Required
Minimum 5 year(s)
Wsparcie pracy sklepu Biedronka I Wierzchosławice Wsparcie pracy sklepu at Jerónimo Martins
Wierzchosławice, Lesser Poland Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Physical Work, Engagement
Specialization
Candidates must be at least 18 years old and enjoy working with people in a team environment. They should be prepared for physical work and demonstrate commitment and a collaborative attitude.
Sprzedawca Kasjer / Lada Tradycyjna Biedronka I Wola Rakowa Sprzedawca at Jerónimo Martins
Wola Rakowa, Łódź Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Physical Work, Cash Handling, Product Display, Price Checking, Store Cleanliness, Bread Baking
Specialization
Candidates should enjoy working with people and be ready for physical work in shifts, including weekends. Engagement and teamwork are essential qualities for applicants.
Sprzedawca JYSK Rybnik, 1/2 etatu (2600 PLN) at JYSK
Rybnik, Silesian Voivodeship, Poland - Full Time
Skills Needed
Sales, Customer Service, Communication Skills, Team Collaboration, Goal Orientation, Flexibility, Initiative, Learning Agility
Specialization
We expect openness to others, initiative, and the ability to provide the best customer experience. You should have good communication skills and a willingness to learn and improve your qualifications.
Controller within Service Delivery at H&M Group
Gądki, Greater Poland Voivodeship, Poland - Full Time
Skills Needed
Budget Management, Financial Compliance, Vendor Management, Invoice Handling, Controlling, Service Delivery, Continuous Improvement, Stakeholder Management, Financial Evaluations, Business Cases, Change Management, Operational Efficiency, Communication, Adaptability, Proactive Solution Development
Specialization
Candidates should have experience in budget creation and management, as well as proficiency in invoice handling and vendor management. A degree in Accounting, Finance, Business Administration, or equivalent is required, along with a mindset for continuous improvement.
Experience Required
Minimum 5 year(s)
SaaS Sales Representative (Commission-based) at Penguin Formula
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
B2b Saas, Compliance, Legal Tech Sales, Fluent In Italian, Strong English Proficiency, Gdpr, Nis2, Dora, Privacy Regulations, Entrepreneurial, Self Driven, Client Relationships
Specialization
Proven experience in B2B SaaS, compliance, or legal-tech sales is required, along with fluency in Italian and strong English proficiency. Familiarity with GDPR, NIS2, DORA, or privacy regulations is a strong plus.
Experience Required
Minimum 2 year(s)
Asystent ds. Technicznej Obsługi Klienta Laboratoryjnego at Eurofins
Łódź, Łódź Voivodeship, Poland - Full Time
Skills Needed
Polish Language, English Language, Task Prioritization, Teamwork, Time Management, Microsoft Office
Specialization
Candidates should have advanced proficiency in Polish and communicative English. A degree in relevant fields such as chemistry or biology is preferred, along with good organizational skills.
Senior Administration & Workplace Specialist at CD PROJEKT RED
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Office Administration, Workplace Operations, Problem Solving, Planning Abilities, Cross Functional Collaboration, Polish Proficiency, English Proficiency, Supplier Negotiation, Space Planning, Procurement, Vendor Management, Invoice Processing, Internal Ticketing System Management, Canteen Operations, Renovation Project Management, Architectural Familiarity, Interior Design
Specialization
Candidates should have a minimum of 5 years of experience in office administration or workplace operations, with proven problem-solving and planning abilities. Proficiency in Polish and English is required, along with a willingness to work primarily on-site in Warsaw.
Experience Required
Minimum 5 year(s)
Mobilny przedstawiciel handlowy w branży samochodowej at AUTO1 Group
Gdynia, pomorskie, Poland - Full Time
Skills Needed
Communication, Sales, Customer Relationship Management, Organization, Negotiation, Problem Solving
Specialization
A passion for the automotive industry and excellent communication skills are essential. Being organized and motivated by competition will help you succeed in this role.
Kierownik Sklepu JYSK Miłków k.Karpacza -nowa lokalizacja (7500 PLN) at JYSK
Miłków, Lower Silesian Voivodeship, Poland - Full Time
Skills Needed
Team Management, Customer Service, Sales Performance, Communication Skills, Decision Making, Problem Solving, Recruitment, Training, Leadership, Motivation, Time Management, Adaptability, Retail Experience, Goal Orientation, Dynamic Environment
Specialization
Candidates should have proven experience in team management and a strong focus on achieving results. Effective communication skills and the ability to work under pressure are essential.
Experience Required
Minimum 2 year(s)
Staff ML & AI Scientist at Visa
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Machine Learning, Deep Learning, Statistical Analysis, Python, Data Science, Neural Networks, Transformers, Graph Neural Networks, Natural Language Processing, Mlops, Model Interpretability, Big Data, A/B Testing, Financial Data, Model Validation, Custom Algorithms
Specialization
Candidates should have an MS or PhD in a quantitative discipline with strong machine learning and deep learning skills. Preferred qualifications include 7+ years of experience, proficiency in Python, and hands-on experience with deep learning models and big data tools.
Experience Required
Minimum 5 year(s)
Manager.Finance & Accounts.Aster Office - Jordan at Aster DM Healthcare
Jordanów, Lesser Poland Voivodeship, Poland - Full Time
Skills Needed
N/A
Specialization
Candidates should have a strong background in finance and accounting principles. Relevant experience in a managerial role is preferred.
Experience Required
Minimum 5 year(s)
Rituals Advisor / pomoc świąteczna - Wrocław, Magnolia Park at Rituals
Wrocław, Lower Silesian Voivodeship, Poland - Full Time
Skills Needed
Customer Service, Teamwork, Problem Solving, Attention To Detail, Organization, Sales, Communication, Relationship Building
Specialization
The ideal candidate is energetic, humble, and possesses a sense of humor, with strong relationship-building skills. Experience in retail or hospitality, a customer-focused attitude, and problem-solving abilities are essential.
Client Onboarding Intermediate Analyst with Spanish at Citi
Warsaw, Masovian Voivodeship, Poland - Full Time
Skills Needed
Client Onboarding, Documentation Review, Customer Service, Project Management, Interpersonal Skills, Communication Skills, Organizational Skills, Attention To Detail, Microsoft Office, Spanish, English, Team Player, Independence, Problem Solving, Risk Management, High Volume Environment, Time Management
Specialization
Candidates should have 3-5 years of experience in documentation review and client onboarding within financial institutions. Proficiency in English and Spanish is required, with additional languages being a plus.
Experience Required
Minimum 2 year(s)
Specjalista ds. Aplikacji Biznesowych at FLEX LTD - USA
Tczew, Pomeranian Voivodeship, Poland - Full Time
Skills Needed
Erp, Mes, Sql, Api, Edi, Business Processes, Analytical Skills, Teamwork, Technical Solutions, Documentation, Reporting, User Support, System Integration, Problem Solving, Continuous Improvement
Specialization
Candidates should have knowledge of ERP and MES systems, as well as SQL skills. A degree in a related field and the ability to communicate in English are also required.
Area Sales Manager at Docplanner
Warszawa, Pomeranian Voivodeship, Poland - Full Time
Skills Needed
B2b Sales, Client Acquisition, Relationship Building, Listening Skills, Objection Handling, Kpi Management, Saas Knowledge, Technology Proficiency, Medical Industry Knowledge
Specialization
Candidates should have a minimum of 2 years of experience in B2B sales and client acquisition. Understanding client needs and effective communication skills are essential, along with experience working towards KPIs.
Experience Required
Minimum 2 year(s)
Lead Specialist Procurement HNC at DSM
Buk, West Pomeranian Voivodeship, Poland - Full Time
Skills Needed
Purchasing, Sourcing, Supplier Relationships, Data Management, Cross Functional Collaboration, Sap, Trackwise, Raw Material Qualifications, Ms Office, Project Participation
Specialization
Candidates should have 2-3 years of purchasing experience and be fluent in English. A higher education background in business administration, commerce, or engineering is preferred, along with experience in cross-functional projects.
Experience Required
Minimum 2 year(s)
Senior Associate, Fund/Client Accounting at BNY
Wrocław, Lower Silesian Voivodeship, Poland - Full Time
Skills Needed
Fund Accounting, Private Equity, Credit Funds, Financial Reporting, Audit, Reconciliations, Leadership, Interpersonal Skills, Gaap, Ifrs, Service Improvement, Cash Reconciliations, Asset Reconciliations, Performance Reporting, Geneva, Investran
Specialization
A bachelor's degree in accounting or equivalent experience is required, along with 5 years of relevant work experience. Prior experience with Private Equity and Credit Funds is advantageous.
Experience Required
Minimum 5 year(s)
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