Senior Software Engineer

🏢 Summary: Senior Software Engineer role focused on digital payments modernization and card network integration for a major financial institution. The position involves backend application engineering, performance testing, cloud-native modernization, and event-driven payment systems using Java and containerized platforms. Candidates will work across legacy and modern infrastructure to improve scalability, compliance, and system reliability. 🗂️ Requirements: 5+ years of software engineering experience in Java, Knowledge of Oracle and/or PostgreSQL, Experience with OpenShift, Kubernetes, or containerized environments, Experience with Tomcat and/or WebSphere, Enterprise-level performance testing experience, Experience with load testing and performance profiling, Ability to design performance testing frameworks, Understanding of PCI compliance and secure data handling, Familiarity with event-driven architectures, Experience working in large multi-team environments, Strong written and verbal communication skills, Bachelor’s degree or equivalent experience 📃 Skills: Java, Oracle, PostgreSQL, OpenShift, Kubernetes, Tomcat, WebSphere, PCI, GitHub, Copilot, PGLogical, Claude 🏢 Description: Kunai builds full-stack technology solutions for banks, credit and payment networks, infrastructure providers, and their customers. Together, we are changing the world's relationship with financial services. At Kunai, we help our clients modernize, capitalize on emerging trends, and evolve their business for the coming decades by remaining tech-agnostic and human-centered.We are seeking a Senior Software Engineer to join a high-impact digital payments modernization program supporting the integration of a major card network into one of the largest financial institutions in the United States. This is a hands-on engineering role at the intersection of legacy and modern infrastructure, where you will contribute to both the reliability of mission-critical payment systems today and help shape the architecture that will power them tomorrow. You will work across scalable backend services, performance testing frameworks, and application engineering — with real opportunity to grow your skills on modern cloud-native technologies as the program evolves. WHAT YOU'LL DO You will be embedded across one or more workstreams supporting digital payments engineering, with responsibilities that may include: Scalability, Performance Testing & Validation Design and execute enterprise-grade performance testing strategies for payment processing services, defining frameworks, tooling, and success criteria from the ground up. Identify performance bottlenecks across legacy and modern service layers and drive measurable improvements through analysis and targeted optimization. Instrument and validate services running on Java, Oracle, Tomcat, and WebSphere as well as modern workloads running on PostgreSQL and OpenShift. Collaborate with backend engineers to ensure scalability requirements are met across all environments prior to release. Translate performance findings into clear recommendations for engineering leads and stakeholders. Application Engineering Build and maintain full-stack backend services supporting card network integration, working primarily in Java with PostgreSQL and OpenShift Container Platform (OCP). Contribute to application modernization efforts, migrating and re-platforming services from legacy infrastructure to cloud-native environments. Leverage AI-assisted development tooling (including GitHub Copilot) to improve development velocity and code quality. Participate in code reviews, architectural discussions, and cross-team technical planning sessions. General Engineering PCI data purging pipelines and event-driven architecture patterns including token removal and event consumption. Work with event-driven services running on OpenShift and Oracle and PostgreSQL backends to support data lifecycle and compliance requirements. Serve as a flexible, senior contributor across teams where engineering depth and experience are needed most. REQUIRED SKILLS & EXPERIENCE Core Engineering 5+ years of professional software engineering experience, primarily in Java. Strong working knowledge of relational databases — Oracle and/or PostgreSQL required. Experience deploying and operating services in containerized environments (OpenShift, Kubernetes, or equivalent). Familiarity with legacy enterprise application servers — Tomcat and/or WebSphere experience a plus. Performance Engineering At least one enterprise-level performance testing engagement — defining strategy, selecting tooling, executing tests, and presenting findings. Experience with performance profiling, load testing, and bottleneck resolution in high-throughput, distributed systems. Ability to design logical, streamlined test frameworks from scratch and operate with minimal guidance. Payments & Financial Services Background in digital payments, card processing, or financial services technology strongly preferred. Understanding of PCI compliance requirements and secure data handling practices. Familiarity with event-driven architecture patterns and OpenShift-based eventing. Collaboration & Communication Demonstrated ability to work effectively in large, matrixed program environments with multiple teams and stakeholders. Strong written and verbal communication skills; able to translate technical complexity for non-technical audiences. Comfortable operating in environments with evolving requirements and ambiguity. NICE TO HAVE Experience with PGLogical or PostgreSQL logical replication. Exposure to AI-assisted development tools (GitHub Copilot or Claude). Prior work on bank or card network integration programs. Experience working in segregated or air-gapped development environments. Our success over the past 20 years is rooted in our exceptional team, which thrives in a culture of collaboration, creativity, and continuous learning. We are proud to offer our employees a range of benefits, including competitive compensation, professional development opportunities, and flexible work arrangements, all designed to help them thrive. As we continue to expand, we remain committed to cultivating an environment where people feel valued, have a voice, and are given the tools to grow—both personally and professionally—while pushing the boundaries of innovation in the fintech industry. Minimum Degree Required: Bachelor's Degree, in lieu of a degree, demonstrating in addition to the minimum years of experience required for the role, three years of specialized training and/or progressively responsible work experience in technology for each missing year of college is required

🏢 Summary: Backend Engineer role focused on building an API-first, event-driven payments platform based on Java microservices running on AWS and Kubernetes. The position covers full lifecycle development, including design, implementation, and production deployment of scalable, secure, and high-performance payment services. The platform emphasizes strong contracts, Kafka-based event streaming, and robust PostgreSQL persistence. 🗂️ Requirements: Minimum 6 years backend development experience, Strong experience building Java microservices, Experience in payments engineering (transaction lifecycle, settlement, reconciliation), Solid understanding of event-driven architecture and Kafka, Knowledge of reactive patterns, at-least-once delivery, idempotency, Strong experience with relational databases and PostgreSQL, Experience with SQL, data modeling, migrations, query optimization, Hands-on experience with Kubernetes and AWS, Experience with CI/CD and GitOps, Experience with API Gateway (routing, versioning, authentication, rate limiting) 📃 Skills: Java, Kafka, PostgreSQL, AWS, Kubernetes, SQL, Flyway, Terraform, GitLab, FluxCD, OpenAPI, XRay, CloudWatch, OpenTelemetry, Python 🏢 Description: About the Company Autopay Global is the newest member of the Autopay family — a project created to bring our advanced payment integration and payment data technologies to international markets. We build solutions that connect with local PSPs, support multi-currency flows, and ensure compliance with regional regulations. We think boldly, act responsibly, and believe that the best ideas arise where creativity meets modern technology. If you want to shape the future of payment products and have a real influence on technical decisions — join us. About the role As a Backend Engineer, you will contribute to building the Autopay Payments Platform as a fully API‑first product- including Merchant APIs, PSP/Rail APIs, event streams, and microservices running on Kubernetes/AWS. We focus on event‑driven architecture, strong contracts, determinism, idempotency, and interoperability. Our ambition is to make the platform Agentic‑Ready: secure, predictable, high‑performance, and optimized for automation at scale. This is a hands‑on role that spans design, development, and production deployment. You will work across a broad engineering stack. Your day‑to‑day responsibilities will include: designing, coding, testing, and shipping Java microservices — domain logic, workflows/state machines, adapters, and stream processors powering payment flows, using contract‑first development (OpenAPI) to build a versioned, API‑first service layer compatible with an API Gateway, creating agentic‑ready endpoints — asynchronous where applicable, highly performant, and robust, implementing event‑driven architecture with Kafka: topic design, message contracts, retries/DLQs, ordering, idempotent consumers, and replay handling, building PostgreSQL persistence: schema design, migrations, constraints, indexing, tuning, and high‑volume data integrity, deploying and operating services on AWS + Kubernetes, provisioning with Terraform and delivering through CI/CD, implementing observability by default — metrics, logs, traces, dashboards, and alerting integrated with AWS‑centric monitoring. What tools will you be working with? Technology: Java, Kubernetes, Kafka, PostgreSQL, AWS Nice to have: knowledge of Python and tooling, experience with observabiloty platforms (Dynatrance, Datadog, New Relic), understanding of Terraform and IaC solutions, Familiarity with Mulesoft Anypoint Platform If any technical concepts are unfamiliar to you, don’t worry. We’ll be happy to help and teach you everything you need. Requirements and skills we are looking for in a person hired for this role: at least 6 years of experience as a backend developer, exposure to payments engineering - transaction lifecycle, settlement, reconciliation, strong backend engineering trackt record building microservices in Java, solid understanding of event-driven architecture (Kafka, queues, topics), reactive patterns, at-least-once delivery and indempontency, fluency in relational databases (ideally PostgreSQL), data modelling, SQL, migrations (preferably Flyway) and query optimization, hands-on experience deploying, running and troubleshooting applications in Kubernetes (preferbaly EKS) and AWS tools (X-Ray, CloudWatch, Open/Telemetry), familiarity with GitOps and CI/CD (GitLab CI/CD, Flux CD), API Gateway experience - routing, policies, versioning, authentication, rate limiting, proven experience working in Scrum teams, growth mindset and willingness to adopt new technologies (e.g.GenAI-assisted coding), strong communication and collaboration skills. What we are offer? being a part of fast-growing global fintech, opportunities to work with cutting-edge tools and technologies, flexible working model with international exposure, supportive work environement, strong team culture, no dress code. Join us and let's head together where no one has gone before !

🏢 Summary: Senior Java Software Engineer role focused on building and modernizing cloud-native platforms that connect trading systems with operations and regulatory applications within a global investment banking environment. The position involves developing scalable data processing and streaming solutions as part of a multiyear cloud transformation initiative. You will work in agile teams to migrate legacy systems and implement robust CI/CD-driven delivery pipelines. 🗂️ Requirements: Bachelor's degree in Computer Science or relevant technical certification, Strong proficiency in Java and object-oriented design, Hands-on experience with Apache Spark, Proficiency in Python, Experience with CI/CD pipelines and DevOps tools, Practical knowledge of TDD, Experience with cloud platforms (Azure, AWS, or GCP), Understanding of software design principles and patterns, Experience with agile development methodologies 📃 Skills: Java, Python, Apache, Spark, Azure, AWS, GCP, CI/CD, Azure, DevOps, GitHub, GitLab, TDD, Cloud, Databricks, Kubernetes 🏢 Description: For our client, a leading global investment banking institution, we are looking for a Senior Java Software Engineer who will be instrumental in transforming critical financial operations infrastructure. You'll work within an agile team to develop and deliver the strategic backbone that connects trading systems with operations and regulatory platforms, forming a cornerstone of the organization's digital transformation initiative. Our client operates in the investment banking and financial services domain, specifically focusing on digital operations transformation within regulatory and data management systems. This project is part of a multiyear strategic roadmap to migrate and leverage cloud technology to outperform existing technology stacks. The initiative plays a crucial role in enabling the investment bank to meet regulatory obligations while creating value from extensive financial data assets. You'll be part of the Digital Operations technology stream, working in small, autonomous agile teams that are empowered to respond to client demands while continuously improving the delivery experience. The team operates globally with members across multiple continents, fostering an inclusive and diverse collaborative environment. This role offers a hybrid model, with 3 days per week working from the client's office in Krakow, Poland. Ready to launch your career in cloud engineering? Apply now and join our global team! Responsibilities Design and develop strategic platforms enabling trade executions to flow seamlessly from trading systems to operations and regulatory applications Transform epics and features into robust, scalable functionality within cloud-native architectures Collaborate closely with agile pod members in sprint cycles to iteratively deliver on product requirements Work directly with product teams to understand and implement complex functional requirements Implement modern data streaming, real-time, and batch processing solutions Develop and maintain CI/CD pipelines using DevOps best practices Apply Test-Driven Development (TDD) methodologies to ensure code quality Contribute to cloud architecture design and implementation decisions Participate in code reviews and technical design discussions Support the migration of legacy systems to modern cloud-based solutions Requirements Bachelor's degree in Computer Science or relevant technical certification Strong proficiency in Java programming and object-oriented design principles Solid experience with Apache Spark for big data processing Proficiency in Python for data processing and automation tasks Significant experience with DevOps CI/CD pipelines and tools such as Azure DevOps, GitHub, or GitLab Strong background in Test-Driven Development (TDD) practices Proven experience with cloud architecture and deployment on Azure, AWS, or GCP platforms Deep understanding of software design principles and patterns Experience with agile development methodologies and sprint-based delivery Strong problem-solving and analytical skills Excellent communication and collaboration abilities Ability to work effectively in diverse, distributed teams Nice to have Experience with modern data streaming technologies and real-time processing frameworks Hands-on experience with Databricks for advanced analytics and machine learning Knowledge of Kubernetes for container orchestration and microservices deployment Understanding of financial services domain and regulatory requirements Experience with batch processing frameworks and data pipeline orchestration Familiarity with investment banking operations and trading systems Previous experience in digital transformation initiatives Knowledge of regulatory compliance frameworks in financial services We offer/Benefits 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.

🏢 Summary: Leadership role for a Lead Backend Engineer to build and evolve an API-first, event-driven payments platform based on microservices deployed to Kubernetes/AWS. The position combines hands-on development in Java with technical ownership of architecture, API design, and distributed systems reliability. The platform focuses on scalable, observable and idempotent payment processing with strong API gateway integration. 🗂️ Requirements: Minimum 8 years backend development experience, Minimum 5 years experience as development team lead, Strong experience building microservices in Java and/or Python, Solid understanding of event-driven architecture and Kafka, Experience with reactive patterns and idempotency, Strong knowledge of relational databases and PostgreSQL, Experience with SQL, data modelling and migrations (Flyway), Hands-on experience deploying to Kubernetes (preferably EKS), Experience with AWS services, API Gateway experience (authentication, routing, rate limiting), Experience with CI/CD pipelines and GitOps, Experience troubleshooting distributed systems, Understanding of payments engineering (transaction lifecycle, settlement, reconciliation), Experience working in Scrum and sprint-based delivery 📃 Skills: Java, Python, Kubernetes, EKS, AWS, Kafka, PostgreSQL, SQL, Flyway, GitLab, FluxCD, GitOps, CICD, Mulesoft, Terraform, Dynatrace, Datadog, NewRelic, OpenTelemetry, XRay, CloudWatch, Scrum 🏢 Description: About the company Autopay Global is the newest member of the Autopay family, aiming to expand the reach of the group’s state-of-the-art payment integration and payment data technologies to the international market, providing seamless integration with local PSPs, support for multiple currencies and compliance with local frameworks. We have a very forward-looking approach to our products, we value creativity, passion and drive to leverage the newest achievements in technology to our advantage. To support our dynamic expansion, we are looking for a new Lead Backend Engineer. About the role Lead Backend Engineer is a leader of a team of engineers working on delivering the Autopay Payments Platform as an API-first platform, consisting of Merchant APIs and PSP/Rail APIs, fronted by an API gateway and backed by event-driven microservices on Kubernetes/AWS. The Platform is aiming to be Agentic-Ready – its APIs and events can be safely consumed by automations and agents at scale – contract-first, deterministic, idempotent, observable and fast. The role merges team supervision with hands-on duties so it requires both software development experience as well as interpersonal and management skills. Your primary duties will be to: c ommunicate with business stakeholders to make sure the product requirements are clearly understood and deliverable, work with other team leaders on alignment with architecture, infrastructure and data management guidelines, support the members of your team with your expertise and insight when dealing with their current workload, review the work of your team members to ensure a reliable delivery of features in two-week sprints, create, document, explain and enforce best coding practices and patterns, o nboard new team members and ensure a frictionless introduction to the project. Get involved in designing, coding, testing, fine-tuning and shipping the elements of the Autopay Payments Platform, taking into consideration the following aspects: containerization of microservices, event-driven architecture and reactive patterns, replay handling, idempotency, retry and ordering strategies, API-Gateway compatibility for authentication, authorization, rate limiting, and traceability, performance optimization, caching and connection pooling, relational schema design, migration, maintenance and tunin, deployment to Kubernetes clusters, observability with alignment to central monitoring stacks. What tools will you be working with? technologies: Java, Kubernetes, Kafka, PostgreSQL, AWS nice to have: k nowledge of Python programming language and tooling, experience with stack observability platforms such as Dynatrace, Datadog or New Relic, familiarity with Mulesoft Anypoint Platform will be a great advantage, understanding of IaC solutions with focus on Terraform If any technical concepts are unfamiliar to you, don’t worry. We will be happy to support you and teach you everything you need. Requirements and skills we are looking for in the person hired for this role: minimum 8 years of experience as a backend developer, minimum 5 years of experience on a development team lead position or equivalent, exposure to payments engineering – understanding of transaction lifecycle, settlement and reconciliation concepts, strong leadership qualities and interpersonal skills, ability to understand existing code for review purposes, proven backend engineering track record building microservices in Java and/or Python solid understanding of event-driven architecture, queues and topics (Kafka), reactive programming patterns with at-least-once semantics and idempotency, solid understanding of relational databases (preferably PostgreSQL), data modelling, modern SQL, migrations (preferably Flyway) and performance optimization, strong experience with deploying applications to Kubernetes clusters (preferably EKS other AWS tooling like X-Ray/ CloudWatch and/or OpenTelemetry), familiarity with GitOps practices and working with CI/CD pipelines (preferably Gitlab and FluxCD), API Gateway experience, including policies, routing, versioning, authentication and rate limiting, solid experience with troubleshooting in distributed environments; setting up tooling to support debugging, performance metrics etc., proven track record of participation in Scrum projects and ability to work in sprints, growth mindset and ability to apply new technologies, patterns or solutions to the current workstream (i.e. GenAI-assisted coding) What do we offer? leadership role in a fast-growing, global fintech company, possibility to work with cutting-edge tools and technologies, independence in decision-making, friendly working environment, team support, no dress code. Join us and let's head together where no one has gone before! !

🏢 Summary: Senior Full-Stack Engineer role focused on building and scaling an AI-powered document processing and automation platform in a cloud environment. The position involves developing backend services in Python and front-end applications in TypeScript while delivering scalable APIs, microservices, and data workflows. The role requires hands-on contribution to architecture, cloud deployment, and integration of AI-driven features. 🗂️ Requirements: 6+ years of professional software engineering experience, Strong proficiency in Python, Experience with FastAPI, Flask, or Django, Solid experience with TypeScript, Experience with React or Next.js, Hands-on experience designing and implementing microservices, Experience building and integrating REST APIs, Strong knowledge of relational or NoSQL databases, Experience with AWS or Azure, Familiarity with CI/CD pipelines, Experience with Docker, Proficiency with Git, Understanding of scalability, reliability, performance, and security principles 📃 Skills: Python, FastAPI, Flask, Django, TypeScript, React, Next.js, REST, Microservices, PostgreSQL, MySQL, MongoDB, Firestore, AWS, Azure, Docker, Git, CI/CD 🏢 Description: Client Overview Our client is a global UK-based financial services and investment banking organization developing an AI-powered document processing and automation platform used across multiple business units. The platform focuses on large-scale data processing, workflow automation, integration with internal systems, and delivering modern digital capabilities for the wider banking group. Position Overview We are looking for a Senior Full-Stack Engineer to join a cross-functional engineering team building core components of the AI-driven document processing platform. This position requires strong backend engineering experience with Python as well as solid front-end or full-stack proficiency with TypeScript (preferably React, Next.js, or similar frameworks). You will work on delivering scalable APIs, microservices, data workflows, and UI components that power document automation features, internal tools, and operational dashboards. The role involves close collaboration with product, architecture, GenAI, and platform engineering teams. This role is ideal for someone who is hands-on, highly technical, and comfortable designing, developing, and deploying production-grade systems in cloud environments (preferably Google Cloud). Key Responsibilities Design, develop, and maintain backend services using Python (FastAPI, Flask, Django, or similar frameworks). Build front-end components and UIs using TypeScript (React, Next.js, or similar frameworks). Develop and integrate REST APIs and microservices, ensuring strong performance, reliability, and observability. Collaborate closely with GenAI engineers to integrate AI-driven features and document-processing flows. Implement data processing pipelines for structured and unstructured data. Contribute to the platform’s architecture, design patterns, and technical decision-making. Write automated tests and ensure a high level of code quality, maintainability, and security. Partner with product managers, designers, and QA engineers to deliver high-quality solutions on time. Document code, service interfaces, workflows, and architectural decisions. Requirements 6+ years of professional software engineering experience, with significant work in both backend and full-stack roles. Strong proficiency in Python (FastAPI, Flask, Django, or similar). Solid experience with TypeScript and modern front-end frameworks (React, Next.js, or similar). Hands-on experience designing and implementing microservices, APIs, and backend systems. Strong understanding of databases: relational (PostgreSQL, MySQL) and/or NoSQL (MongoDB, Firestore). Experience with any cloud providers (AWS/Azure). Familiarity with CI/CD pipelines, Docker, Git, and modern DevOps practices. Strong understanding of software engineering principles: scalability, reliability, performance, and security. Experience working in agile, cross-functional teams on complex products. Excellent communication skills and ability to work with both technical and non-technical stakeholders. Nice to Have Experience working with AI/ML or GenAI-driven systems. Experience with Google Cloud Platform Familiarity with Vertex AI, Gemini, or integration with LLM-powered services. Experience with WebSockets, event-driven architectures, or Pub/Sub. Knowledge of authentication/authorization standards (OAuth2, JWT, IAM). Experience with document processing, OCR, or workflow automation.

🏢 Summary: Senior QA Engineer role focused on testing and validating card payment processing systems within a payments domain project. The position involves end-to-end verification of card transaction flows and close collaboration in an Agile environment. It offers work on international payment platforms in a remote or hybrid model. 🗂️ Requirements: Proven experience as QA Engineer or Software Tester, Strong experience testing credit card payment systems, Hands-on experience with card processing platforms (e.g., HPS PowerCARD or similar), Understanding of card payment ecosystems and transaction workflows, Experience with integration, system, regression, and UAT testing, Experience working in Agile environments, Fluent French (spoken and written) 📃 Skills: QA, Testing, Payments, PowerCARD, HPS, VisionPLUS, TS2, Way4, Prime, CardSuite, ISO8583, Agile, French, Automation 🏢 Description: About the Role We are looking for an experienced Senior QA Engineer to join a project within the payments domain. The ideal candidate will have strong software testing experience, excellent French language skills, and hands-on exposure to card payment processing platforms. Key Responsibilities Design, execute, and maintain test scenarios and test cases for payment processing systems. Validate end-to-end card transaction flows, including authorization, clearing, and settlement processes. Collaborate with business analysts, developers, and stakeholders to ensure high-quality software delivery. Identify, document, and track defects through to resolution. Participate in requirements analysis and contribute to test strategy and test planning activities. Support integration, system, regression, and user acceptance testing. Required Skills & Experience Proven experience as a Software Tester / QA Engineer. Fluent French language skills (spoken and written). Strong experience testing credit card payment systems. Hands-on experience with card processing platforms such as HPS PowerCARD or similar payment card solutions. Understanding of card payment ecosystems, transaction processing, and payment workflows. Experience working in Agile environments. Nice to Have Experience with payment platforms such as PowerCARD (HPS), VisionPLUS, TS2, Way4, Prime, CardSuite, or similar. Knowledge of ISO 8583 messaging. Experience with test automation tools. Exposure to acquiring, issuing, or transaction switching systems. What We Offer Long-term international project. Fully remote or hybrid working model. Opportunity to work with leading payment technologies and industry experts. Collaborative and multicultural environment.

🏢 Summary: Senior Python Engineer role focused on building and scaling a cloud-native real-time Data Platform handling massive datasets. The position involves developing high-performance backend services, optimizing distributed systems, and integrating large-scale data storage solutions. Hybrid work model in Warsaw with employment benefits including private medical care and multisport card. 🗂️ Requirements: 8+ years of backend software development experience, Advanced Python expertise, Experience with scalable production-grade systems, Knowledge of concurrency and multiprocessing, Experience with Pandas or NumPy, Experience with Parquet or JSON data formats, Knowledge of relational and NoSQL databases, Experience with performance optimization and low-latency systems, Ability to use AI-assisted development tools responsibly 📃 Skills: Python, Pandas, NumPy, Parquet, JSON, SQL, NoSQL, API, OOP, Concurrency, Multiprocessing, Algorithms, Databases, Cloud 🏢 Description: For our client, a leading, high-growth global fintech company – we are looking for an experienced Senior Python Engineer to join a key engineering team responsible for the company’s core data foundation. The project focuses on building, optimizing, and scaling a cloud-native, high-throughput Data Platform designed to ingest, process, and distribute massive datasets in real-time. This platform serves as the backbone for various downstream analytical systems, requiring extreme reliability, performance, and scalability. This is a fantastic opportunity for a strong Python generalist who enjoys solving complex distributed system problems, optimizing data flows, and working with modern cloud architectures. Responsibilities Backend & Pipeline Development: Design and develop scalable backend services and high-performance data processing pipelines using Python. Performance Tuning: Identify bottlenecks and optimize system performance, focus on concurrency, throughput, and low-latency execution. Data Integration & Storage: Build robust integrations with modern cloud-native storage solutions and databases to manage large-scale datasets efficiently. Collaborative Engineering: Work closely with cross-functional technical teams to understand data requirements and deliver reliable API services and platform features. Engineering Excellence: Maintain top-tier coding standards, emphasizing clean code, robust testing (unit/integration), automation, and security. Requirements 8+ years of professional backend software development experience (with a strong track record in building scalable, production-grade systems). Deep expertise in Python (advanced OOP, concurrency/multiprocessing, memory management, data structures, and algorithms). Solid experience with data-centric libraries such as Pandas, NumPy, or similar data processing frameworks. Experience with large-scale data storage formats (e.g., Parquet, JSON, or column-oriented databases) and relational/NoSQL databases. AI-assisted development mindset: Comfortable utilizing AI tools  to accelerate delivery, while maintaining strong developer judgment regarding validation, testing, security, and refactoring. What our client offers: Hybrid work model in Warsaw (minimum 3 days a week in the office - strictly non-negotiable). Contract of Employment (UoP) with increased tax-deductible costs (KUP). Private medical care (including full dental care). Lunch card to cover your daily meals. Multisport card.

🏢 Summary: Senior Software Engineer role focused on building scalable backend systems and customer-facing APIs for AI-driven logistics solutions. The position centers on designing core service layers, workflow engines, and integrations with HERE and third-party APIs to enable intelligent delivery optimization at scale. It emphasizes hands-on backend development, system reliability, and production-quality engineering. 🗂️ Requirements: Strong backend development experience, Proficiency in Python and/or TypeScript, Experience building APIs and backend systems, Experience designing scalable and distributed systems, Understanding of API design and data modeling, Experience with cloud platforms (AWS, GCP, or Azure), Experience with CI/CD practices, Experience integrating external APIs, Ability to debug and troubleshoot production systems 📃 Skills: Python, TypeScript, API, REST, DistributedSystems, AWS, GCP, Azure, CI/CD, LLM, RAG, Integration, DataModeling, Cloud, Git 🏢 Description: What's the role? We are looking for a Senior Software Engineer to build core backend systems powering next-generation agentic AI solutions for the logistics industry. The systems developed by this team optimize deliveries at scale improving driver efficiency, increasing reliability, reducing operational costs, and lowering environmental impact. In this role, you will focus on building the core service layer, customer-facing APIs, workflow engines, and integrations with HERE APIs and third-party systems that enable intelligent logistics workflows. You will work closely with senior engineers and technical leaders to design and implement scalable, reliable systems that support AI-driven planning and optimization use cases. This is a hands-on engineering role with a strong focus on backend development, system reliability, and production-quality delivery . What You’ll Do: Design, build, and maintain core backend services, APIs, and workflow orchestration systems for logistics applications Implement integrations with HERE APIs and external third-party systems to support real-world logistics workflows Translate product and technical requirements into scalable and maintainable system components Write clean, efficient, and well-tested code in Python and/or TypeScript Contribute to system design discussions and implement solutions aligned with the overall architecture Build and maintain customer-facing APIs with a strong focus on usability, performance, and reliability Ensure high-quality delivery through testing, monitoring, and debugging in production environments Collaborate with engineers, product managers, and domain experts to deliver end-to-end features Continuously improve system performance, scalability, and operational efficiency Leverage AI-assisted development tools to improve development speed and code quality Who are you? What We’re Looking For: Software engineering experience with strong backend development skills Proficiency in Python and/or TypeScript, with experience building APIs and backend systems Experience designing and building scalable services and working with distributed systems Strong understanding of API design, data modeling, and system integration patterns Experience working with cloud platforms (AWS, GCP, or Azure) and modern CI/CD practices Familiarity with building or integrating AI/ML systems (e.g., working with LLM APIs, RAG-based systems, or similar) is a plus Experience integrating with external APIs and handling real-world data and system constraints Solid debugging and problem-solving skills in production environments Ability to work independently on well-defined problems and collaborate effectively within a team Good communication skills and a pragmatic approach to engineering challenges What We Offer: The opportunity to tackle meaningful and challenging problems A chance to continuously learn and stay on top of the latest technology trends Work that has real-world impact, shaping the future of mobility and technology Regular feedback to help you grow and succeed in your role A collaborative and supportive team environment where your contributions are valued Competitive salary plus bonus Flexible working hours and a hybrid working environment Medical coverage for you and your family This role is eligible for Creative Tax Incentive scheme in Poland” or KUP (Autorskie Koszty Uzyskania Przychodu) Option to work on a B2B contract (please note: benefits, bonus and KUP do not apply in this case) Change is HERE. Apply Now! #LI-AK8   #LI-HYBRID Life at HERE in Poland comes with a competitive total rewards package designed to support your health, wellbeing, and performance. This includes a base salary, a Short-Term Incentive (STI) bonus (percentage based on role), a creative tax advantage for eligible positions, private medical care (including dental), life insurance, a meal allowance, vision reimbursement, a remote work allowance (if applicable), access to MyBenefit and Multisport programs, and various wellbeing initiatives. Paid time off, sick leave, and parental leave are provided in accordance with the Polish Labor Code. As part of HERE Technologies employment process, candidates will be required to successfully complete a pre-employment screening process. This offer and any related claims are subject to the successful completion of a pre-employment screening. This will involve employment, education, and criminal verification if applicable. HERE is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, age, gender identity, sexual orientation, marital status, parental status, religion, sex, national origin, disability, veteran status, and other legally protected characteristics. Who are we? HERE Technologies is a location data and technology platform company. We empower our customers to achieve better outcomes – from helping a city manage its infrastructure or a business optimize its assets to guiding drivers to their destination safely. At HERE we take it upon ourselves to be the change we wish to see. We create solutions that fuel innovation, provide opportunity and foster inclusion to improve people’s lives. If you are inspired by an open world and driven to create positive change, join us. Learn more about us on our YouTube Channel. Apply for this job online Email this job to a friend Share on your newsfeed Connect With Us! Not ready to apply? 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🏢 Summary: Backend Engineer role focused on building and modernising a global payments platform using Java and microservices architecture. The position involves developing reliable backend services and creating robust test automation frameworks to ensure high-quality, scalable payment processing. The role supports migration from legacy systems to API-driven, microservices-based solutions in an Agile/DevOps environment. 🗂️ Requirements: Strong experience with Java 11+, Hands-on experience in software testing and automation frameworks, Understanding of REST APIs, Knowledge of microservices architecture, Experience with Git, Experience with Unix/Linux environments, Experience with SQL databases, Experience with Spring and Spring Boot 📃 Skills: Java, Spring, SpringBoot, SQL, Oracle, Git, Unix, Linux, REST, Microservices, Automation, Testing 🏢 Description: Build the platform that moves money around the world We’re looking for a Backend Engineer with strong Java and test automation experience to join the team behind a global payments platform that enables businesses and customers to move money quickly, securely, and globally . The platform powers international payments that help organisations pay suppliers, process salaries, transfer funds, and pay taxes directly to authorities through multiple channels. You’ll play a key role in modernising payment systems , building high-quality microservices , and developing automation frameworks that ensure reliability at scale . As part of the engineering team, you’ll help design and build reliable payment services used globally. You will: Develop and maintain backend services and microservices in Java (11/17/21) Design and implement robust test automation frameworks to ensure high-quality software delivery Support the modernisation of legacy systems , migrating towards API and microservices-based architecture Improve system efficiency by increasing Straight-Through Processing (STP) capabilities Collaborate closely with engineers, testers, and stakeholders in an Agile/DevOps environment Contribute to scalable, resilient solutions powering global payment flows Must-have experience Strong development experience with Java 11+ (Java 17+ preferred) Hands-on experience in software testing and building automation frameworks Solid understanding of RESTful APIs and microservices architecture Experience working with Git for version control Comfortable working in Unix/Linux environments and command-line tools Experience with databases and SQL (Oracle preferred) Experience with Spring / Spring Boot Nice to have Experience with Test-Driven Development (TDD) Knowledge of scripting languages such as Python or Bash Experience working within a QA or testing-focused team Understanding of application monitoring and observability tools The role has a Hybrid model : candidates form Cracow 6x per month, outside of Cracow 3 - 5 x per month, from Warsaw 6x per month

🏢 Summary: Senior Software Engineer role focused on building scalable front-end and cloud-native applications, with flexibility for deep specialization in modern front-end technologies or AWS cloud engineering. The position involves designing serverless architectures, integrating APIs, managing databases, and implementing CI/CD pipelines in a collaborative environment. Regular on-site presence and strong English communication skills are required. 🗂️ Requirements: Minimum 8 years of commercial software development experience, Strong expertise in front-end development with component-based frameworks or AWS cloud engineering, Hands-on experience designing and delivering cloud-native applications, Experience with serverless architectures, Solid understanding of API design principles and distributed systems, Experience with CI/CD pipelines and deployment automation, Ability to communicate fluently in English, Availability for regular on-site work 📃 Skills: JavaScript, TypeScript, AWS, Serverless, REST, SQL, NoSQL, CI/CD, Docker, Kubernetes 🏢 Description: We are looking for a highly experienced Software Engineer with strong expertise in modern front-end technologies and cloud-based solutions. In this role, you will be responsible for designing and delivering scalable, high-quality applications in a highly collaborative and fast-paced environment. The position requires regular on-site presence and the ability to communicate effectively in English with both technical and non-technical stakeholders. Depending on your strengths, we welcome candidates with either deep front-end specialization or strong hands-on experience in cloud engineering, ideally combining both. Your tasks Develop and maintain applications using modern front-end technologies and strongly typed languages Design and implement scalable cloud-based architectures, including serverless solutions Build and integrate RESTful services to support application functionality Work with both relational and non-relational databases to manage and process data effectively Create and optimize automated deployment pipelines for continuous integration and delivery Collaborate with stakeholders to translate business requirements into technical solutions Requirements Minimum 8 years of commercial experience in software development using modern programming languages Strong hands-on expertise in either front-end development (including component-based frameworks) or cloud engineering (AWS) Practical experience designing and delivering cloud-native applications, preferably in a serverless environment Solid understanding of API design principles and best practices for distributed systems Experience working with CI/CD pipelines and deployment automation tools Excellent communication skills with the ability to explain technical concepts clearly, and fluency in English What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!