Senior Software Engineer, Back-end (Fraud)

🏢 Summary: Senior Software Engineer role focused on building and scaling a high-availability Merchant Data Platform that powers checkout-critical services and merchant data pipelines. The position involves designing, delivering, and maintaining distributed backend systems while leading technical initiatives and mentoring engineers. The role emphasizes ownership of reliability, performance, and scalable system design in a fully remote environment. 🗂️ Requirements: 4+ years of software engineering experience with leadership responsibilities, Experience designing and launching scalable backend systems, Proficiency in Python or Kotlin, Experience building highly available distributed systems, Hands-on experience with AWS, MySQL, and Kubernetes, Experience defining technical plans and delivering large features or system components, Ability to work with large codebases and perform code reviews, Experience ensuring system availability, reliability, and performance 📃 Skills: Python, Kotlin, AWS, MySQL, Kubernetes, DistributedSystems, Backend, Microservices, APIs, SQL 🏢 Description: Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. The Merchant Data Platform is a backend, foundational service at Affirm. We are responsible for merchant data and identity across all merchant touchpoints. Our checkout-critical platform serves millions of requests per day, supports the onboarding of merchants across all onboarding touchpoints, and maintains strict availability and latency SLAs given the criticality of the service. Further, the team maintains sophisticated pipelines that enrich our datasets for the purposes of merchant identification, risk analysis, and fraud detection. We’re looking for a Senior Software Engineer to join our fully remote team based in Europe. What You'll Do You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery. You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs. You will proactively identify project, process, technology or business issues, advocate for them, and lead in solving them. You will drive detailed project definition, design, cross-functional alignment, estimation, in addition to task break-down, delivery, monitoring, and maintenance. You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts. You will contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process. You will mentor engineers on the team to help improve their designs, code quality, and testing. You will own the availability, reliability, and performance of your team’s systems. What We Look For You have 4+ years of experience as a software engineer with leadership responsibilities and experience mentoring junior engineers. You have experience designing, developing and launching backend systems at scale and are proficient in one of Python or Kotlin You have a track record of developing highly available distributed systems using technologies like AWS, MySQL and Kubernetes. You are expert at synthesizing complex business products, and technical requirements to consistently produce high quality system designs and software. You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews. You have experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design. You write high quality code that is easily understood and used by others. You are proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely. Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders. You have strong verbal and written communication skills that support effective collaboration with our global engineering team. Compensation & Benefits Base Pay Grade - N Equity Grade - 4 Employees new to Affirm typically come in at the start of the pay range . Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents ). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company). POL base pay range per year: 301,000 zł  -  401,000 zł Additional benefits include: Flexible Spending Wallets for tech, food and lifestyle Away Days - wellness days to take off work and recharge Learning & Development programs Parental benefits Employee Resource & Community Groups This role is eligible for creative tax benefits, subject to applicable law and company policy Location - Remote Poland The majority of our roles can be located anywhere in Poland. **This job description is not a contractual document, and is not intended to have binding force.** #LI-Remote

🏢 Summary: Backend Software Engineer role on the Repayment Scheduling team building and operating large-scale systems that enable automatic loan payments for millions of users. The position involves designing, developing, and maintaining distributed backend services that handle high-value financial transactions at scale. Engineers have strong ownership and influence over a newly formed team’s core infrastructure. 🗂️ Requirements: Experience designing and developing backend systems at scale, Proficiency in Python or Kotlin, Knowledge of distributed systems concepts, Experience with AWS, MySQL, and Kubernetes, Ability to write clear, well-tested, maintainable code, Experience working with large codebases and performing code reviews, Ability to debug complex backend systems, Strong technical communication skills 📃 Skills: Python, Kotlin, AWS, MySQL, Kubernetes, DistributedSystems, Backend, Microservices, APIs, Git 🏢 Description: Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. The Repayment Scheduling engineering team is growing rapidly, and we're looking for a Software Engineer specializing in Backend development. We're a fully European engineering team – distributed across Poland and Spain with overlapping working hours. We build and own the system that enables our users to schedule automatic payments to pay back loans worth collectively over $30B each year. We directly improve the financial lives of over 20 million people, giving them peace of mind that their payments will be made on time. The team was created recently with brand new scope, and you would be one of the first engineers on this team. This means an outsized opportunity to influence how a core part of Affirm's infrastructure gets built. This role rewards curiosity, ownership, and a builder's mindset. You'll know exactly what your objectives are, you'll have what you need to hit them, and you'll choose your own path to get there. You'll learn quickly from experienced teammates and grow your craft on problems that matter at scale. If you want to build something new and operate it at scale – come join us! What You'll Do · With the support of your team, you will work on tasks that contribute to the team's projects and goals. · You will work collaboratively and proactively with your team and stakeholders, bringing them along for your work and helping to create visibility and dialog regarding the risks and trade-offs related to your work. · You will strike the right balance of speed and quality in your work, ensuring that we hit our business goals while protecting our systems from downtime. · You will contribute to a sense of community on your team by engaging in growth and development activities. What We Look For · You have previous work or internship experience designing, developing and launching backend systems at scale and are experienced using one of Python or Kotlin. · You are familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes. · You have mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily understood, well tested and extensible code. · You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews. · Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders. · You have strong verbal and written communication skills that support effective collaboration with our global engineering team. Compensation and Benefits Base Pay Grade - J Equity Grade - Poland 2 Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company). POL base pay range per year: 205,000 zł - 285,000 zł Additional benefits include: Type of employment: Contract of Employment Flexible Spending Wallets for tech, food and lifestyle Away Days - wellness days to take off work and recharge Learning & Development programs Parental leave Employee Resource & Community Groups Location - Remote Poland This job description is not a contractual document, and is not intended to have binding force.

🏢 Summary: Backend Software Engineer role focused on building and operating scalable APIs and web applications that power loan repayment user journeys for millions of users. The position involves designing, shipping, and maintaining production systems in a fast-paced, agile environment with frequent releases. Engineers collaborate cross-functionally and ensure reliability, scalability, and high code quality at scale. 🗂️ Requirements: 1.5+ years of software engineering experience, Experience designing and developing scalable APIs, Experience with backend development in Python or Kotlin, Experience building web applications with React or Vue, Ability to write clean, well-tested, extensible code, Ability to work with large codebases and perform code reviews, Experience debugging and maintaining production systems, Strong technical communication skills 📃 Skills: Python, Kotlin, React, Vue, APIs, Backend, Web, Git 🏢 Description: Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. The Repayment UX Engineering team is growing, and we're looking for a Software Engineer specializing in Backend development. We're a full-stack team located entirely in Europe within the same time zone, but culturally rooted in Sillicon Valley. We directly improve the financial lives of over 20 million people. We build and own user journeys that enable them to pay back loans worth collectively over $30B each year. Our team exist to make these moments the most reliable and transparent in world-class consumer finance. Our work is agile and fast-paced, shipping new code to production almost every two-week sprint, and rigorously measuring the impact it has on the behavior of our users. This role rewards curiosity, ownership, and a builder's mindset. You'll know exactly what your objectives are, you'll have what you need to hit them, and you'll choose your own path to get there. You'll learn quickly from experienced teammates and grow your craft on problems that matter at scale. If you want to build something new and operate it at scale – come join us! What You'll Do · With the support of your team’s tech lead and manager, you will break down larger projects into individual tasks, deliver them in multiple phases, and collaborate with others to ensure timely delivery of your work. · You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs. · You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts. · You will contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process. What We Look For · You have a total of 1.5+ years of experience as a software engineer. · You have experience designing, developing and launching APIs at scale using languages like Python or Kotlin. · You have experience shipping web apps using declarative UI frameworks like React or Vue. · You have mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily understood, well tested and extensible code. · You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews. · Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders. · You have strong verbal and written communication skills that support effective collaboration with our global engineering team. Base Pay Grade - L Equity Grade - 3 Employees new to Affirm typically come in at the start of the pay range . Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents ). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company). POL base pay range per year: 252,000 zł  -  352,000 zł Additional benefits include: Flexible Spending Wallets for tech, food and lifestyle Away Days - wellness days to take off work and recharge Learning & Development programs Parental benefits Employee Resource & Community Groups This role is eligible for creative tax benefits, subject to applicable law and company policy Location - Remote Poland The majority of our roles can be located anywhere in Poland. This job description is not a contractual document, and is not intended to have binding force. #LI-Remote Affirm is proud to be a remote-first company! The majority of our roles are remote and you can work almost anywhere within the country of employment. Affirmers in proximal roles have the flexibility to work remotely, but will occasionally be required to work out of their assigned Affirm office. A limited number of roles remain office-based due to the nature of their job responsibilities. We’re extremely proud to offer competitive benefits that are anchored to our core value of people come first. Some key highlights of our benefits package include: Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount We believe It’s On Us to provide an inclusive interview experience for all, including people with disabilities. We are happy to provide reasonable accommodations to candidates in need of individualized support during the hiring process. [For U.S. positions that could be performed in Los Angeles or San Francisco] Pursuant to the San Francisco Fair Chance Ordinance and Los Angeles Fair Chance Initiative for Hiring Ordinance, Affirm will consider for employment qualified applicants with arrest and conviction records. By clicking "Submit Application," you acknowledge that you have read Affirm's Global Candidate Privacy Notice and hereby freely and unambiguously give informed consent to the collection, processing, use, and storage of your personal information as described therein.

🏢 Summary: Staff Software Engineer role focused on designing and scaling backend systems that power capital partner integrations and automated funding processes for loans. The position involves setting technical strategy, building distributed systems, and ensuring high availability and operational excellence. The engineer will lead architecture, integrations, and testing infrastructure for critical financial reporting services. 🗂️ Requirements: 7+ years backend development experience, Experience designing and launching scalable distributed systems, Proficiency in Python or Kotlin, Hands-on experience with AWS, Experience with MySQL, Experience with Kubernetes, Strong knowledge of Spark, Experience delivering large system components or major features, Ability to define technical strategy and execution plans, Experience with monitoring, alerting, and operational processes 📃 Skills: Python, Kotlin, AWS, MySQL, Kubernetes, Spark, Airflow, Temporal, DistributedSystems, Backend, Monitoring, Testing 🏢 Description: Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. The Deal Reporting team is responsible for building our critical capital partner integrations, as well as services to automate funding processes safely and reliably. We partner with Product and Capitals Markets teams to understand and implement complex financial structures, integrations and reporting. We are looking for a highly motivated Staff Software Engineer to help empower Deal Reporting's first international team, and build integrations, services, and testing infrastructure to power the funding of every Affirm loan. What You'll Do: · You will be responsible for setting technical strategy for your team on a year-long time scale, and help your team tie it together with critical, business-impacting projects. · You will collaborate across teams in the product development lifecycle by collaborating with product management, design & analytics to ensure technical sustainability, risks and trade-offs are well understood and managed. · You will act as a force-multiplier for your team through your definition and advocacy of technical solutions and operational processes. · You take ownership of your team’s operations and availability by ensuring you have the right monitoring, triage rotations, playbooks, polcities, testing and alerting in place to support “keep the lights on” & on-call efforts. · You will foster a culture of quality and ownership on your team by setting code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks. · You will help develop talent on your team by providing feedback and guidance, and leading by example. What We Look For: · You have 7+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin. · You have an extensive track record of developing highly available distributed systems using technologies like AWS, MySQL, and Kubernetes. · Knowledge of Spark and it’s inner workings is a must. · Knowledge on task orchestration systems like Airflow or Temporal is a good to have. · You have experience delivering major features, system components or deprecating existing functionality in a system through the definition of a technical and execution plan. You write high quality code that is easily understood and used by others. · You thrive in ambiguity, and are comfortable moving from low level language idioms all the way to the architecture of large systems to understand how they work. · Your growth and impact trajectory demonstrates that you have mastered gathering and iterating on feedback from your engineering and cross-functional peers. · You have strong verbal and written communication skills that support effective collaboration with our global engineering team. Compensation & Benefits Base Pay Grade - P Equity Grade - Poland 5 Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company). POL base pay range per year: 358,000 zł - 458,000 zł Additional benefits include: Type of employment: Contract of Employment Flexible Spending Wallets for tech, food and lifestyle Away Days - wellness days to take off work and recharge Learning & Development programs Parental benefits Employee Resource & Community Groups This role is eligible for creative tax benefits, subject to applicable law and company policy. This job description is not a contractual document, and is not intended to have binding force. Location - Remote Poland The majority of our roles can be located anywhere in Poland.

🏢 Summary: Engineering role focused on building and scaling backend systems for purchase protection (disputes and refunds) as part of an international product expansion. The position involves leading technical delivery, designing scalable solutions, and collaborating with global teams to launch and support new market capabilities. It combines hands-on backend development with ownership of system quality, reliability, and technical direction. 🗂️ Requirements: 4+ years of software engineering experience, Experience designing and launching scalable backend systems, Proficiency in at least one modern backend language (Python, Kotlin, Go, Ruby, or Java), Experience with AWS cloud infrastructure, Experience with MySQL or relational databases, Experience with Kubernetes, Experience building web applications with React or Vue, Ability to define technical plans for large features or system components, Ability to work with and modify large codebases safely, Strong written and verbal communication skills in technical environments 📃 Skills: Python, Kotlin, Go, Ruby, Java, AWS, MySQL, Kubernetes, React, Vue 🏢 Description: Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. Join the pioneering Servicing International team at the forefront of Affirm's global expansion, building the foundational platform to launch our products into a new generation of international markets. This role will focus specifically on purchase protection, including disputes and refunds—a critical part of the user journey and an area of significant investment—to ensure trust and satisfaction for our newest customers. Success requires deep collaboration, and you will partner closely with European engineering counterparts and engineers across our global Servicing Engineering organization to build cohesive, scalable solutions. If you are passionate about creating world-class user experiences and excited by the challenge of launching products in new regions, join us. Help build the next generation of Affirm's platform and define our presence around the world. What You'll Do · You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery. · You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs. · You will proactively identify project, process, technology or business issues, advocate for them, and lead in solving them. · You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts. · You will foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks. · You will help develop talent on your team by providing feedback and guidance, and leading by example. What We Look For · You have a total of 4+ years of experience as a software engineer. · You are experienced in designing, developing and launching backend systems at scale technologies like Python, Kotlin, or any other modern backend language (e.g Go, Ruby , Java) alongside AWS, MySQL, and Kubernetes. · You’ve had exposure to building web apps with declarative UI frameworks (e.g., React or Vue ) and understand the core principles behind them. · You have experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design. You write high quality code that is easily understood and used by others. · You are proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely. · Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders. · You have strong verbal and written communication skills that support effective collaboration with our global engineering team. Compensation and Benefits Base Pay Grade - N Equity Grade - Poland 4 Employees new to Affirm typically come in at the start of the pay range . Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company). POL base pay range per year: 301,000 zł  -  401,000 zł Additional benefits include: Type of employment: Contract of Employment Flexible Spending Wallets for tech, food and lifestyle Away Days - wellness days to take off work and recharge Learning & Development programs Parental benefits Employee Resource & Community Groups This role is eligible for creative tax benefits, subject to applicable law and company policy Location - Remote Poland The majority of our roles can be located anywhere in Poland. This job description is not a contractual document, and is not intended to have binding force.

🏢 Summary: Backend Software Engineer role focused on building and operating a high-availability Merchant Data Platform that powers merchant identity, onboarding, and data pipelines. The position involves designing and maintaining distributed systems that process millions of requests daily while meeting strict latency and availability SLAs. You will develop scalable backend services and data pipelines supporting risk analysis and fraud detection. 🗂️ Requirements: 2+ years of experience as a Software Engineer, Experience designing and developing backend systems, Proficiency in Python or Kotlin, Knowledge of distributed systems fundamentals, Experience with AWS, MySQL, and Kubernetes, Ability to write clean, well-tested, extensible code, Experience working with large codebases and performing code reviews, Ability to monitor systems, manage metrics, and support on-call operations 📃 Skills: Python, Kotlin, AWS, MySQL, Kubernetes, DistributedSystems, Backend, Microservices, APIs, SQL 🏢 Description: Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. The Merchant Data Platform is a backend, foundational service at Affirm. We are responsible for merchant data and identity across all merchant touchpoints. Our checkout-critical platform serves millions of requests per day, supports the onboarding of merchants across all onboarding touchpoints and maintains strict availability and latency SLAs given the criticality of the service. Further, the team maintains sophisticated pipelines that enrich our datasets for the purposes of merchant identification, risk analysis and fraud detection. What You'll Do · With the support of your team’s tech lead and manager, you will break down larger projects into individual tasks, deliver them in multiple phases, and collaborate with others to ensure timely delivery of your work. · You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs. · You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts. · You will contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process. What We Look For · You have a total of 2+ years of experience as a software engineer. · You have experience designing, developing and launching backend systems and are proficient in one of Python or Kotlin. · You are familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes. · You have mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily understood, well tested and extensible code. · You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews. · Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders. · You have strong verbal and written communication skills that support effective collaboration with our global engineering team. Compensation & Benefits Base Pay Grade - L Equity Grade - 3 Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills. Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company). POL base pay range per year: 252,000 zł  -  352,000 zł Additional benefits include: Type of employment: Contract of Employment Flexible Spending Wallets for tech, food and lifestyle Away Days - wellness days to take off work and recharge Learning & Development programs Parental leave Employee Resource & Community Groups This role is eligible for creative tax benefits, subject to applicable law and company policy Location - Remote Poland

🏢 Summary: Senior Software Engineer role focused on backend development for an established SaaS platform using Scala and Python, with expansion of AI-powered features and integrations. The project involves building scalable backend services, integrating AI/LLM solutions, and supporting production-grade architecture and CI/CD workflows in a remote EU-based B2B engagement. 🗂️ Requirements: 7+ years of professional software development experience, Strong production experience with Scala, Strong proficiency in Python, Experience developing production-grade backend applications, Hands-on experience building and maintaining backend services, Ability to work across Scala and Python codebases, Experience with automated testing, Experience with version control, Experience with code reviews, Experience with CI/CD, Understanding of scalable and maintainable software architecture, Ability to independently solve technical problems, Strong communication skills, Fluency in Polish, Advanced English level (B2/C1) 📃 Skills: Scala, Python, REST, CI/CD, Testing, APIs, SaaS, LLM, ElasticSearch, AWS, Azure, GCP, PHP 🏢 Description: Contract: B2B Rate: 150-160 zł/h net + VAT depending on skills and experience Location: Remote within the EU Duration: 6+ months, with the possibility of long-term cooperation Start: ASAP Project: Backend engineering project focused on developing and maintaining a SaaS platform and expanding its AI-powered capabilities. Key Technologies/Areas Scala Python Backend development REST APIs SaaS platforms CI/CD Automated testing Nice to have: AI and LLM integrations, ElasticSearch, AWS, Azure, or GCP Project Overview You’ll join an existing engineering team as a Senior Software Engineer , contributing to the development and maintenance of backend services for an established SaaS platform. The role combines Scala and Python development . Scala is a core technology used within the existing platform, while a significant part of the day-to-day development will be carried out in Python. You will also support the expansion of AI-powered functionality across the product, including integrations with internal and external AI services, LLM platforms, transcription solutions, and other machine-learning-based capabilities. This is a hands-on role for an experienced backend engineer who can work independently, contribute to architectural and technical decisions, and build reliable, scalable, production-ready solutions. Responsibilities Develop, maintain, and extend backend services using Scala and Python. Design and implement scalable functionality across an existing SaaS platform. Build and expand AI-powered features within the product. Integrate internal and external AI services through APIs, including LLM-based platforms and similar tools. Support the maintenance and further development of existing Scala-based services. Develop new backend functionality primarily in Python. Design reliable and maintainable integrations between platform services and external systems. Write clean, testable, and well-documented production code. Participate in technical discussions, code reviews, and architectural decisions. Ensure the quality, scalability, performance, and security of implemented solutions. Work closely with software engineers, product teams, and other technical stakeholders. Support CI/CD processes and modern software development workflows. Troubleshoot production issues and improve the stability of existing services. Requirements At least 7 years of professional software development experience. Strong production experience with Scala . Strong proficiency in Python and experience developing production-grade backend applications. Hands-on experience building and maintaining backend services. Ability to work effectively across both Scala and Python codebases. Strong understanding of software engineering best practices. Experience with automated testing, version control, code reviews, and CI/CD. Good understanding of scalable and maintainable software architecture. Ability to independently analyze technical problems and propose practical solutions. Strong communication skills and the ability to collaborate within an international engineering team. Fluency in Polish and an advanced level of English (B2/C1) Nice to have Commercial experience working with LLMs or generative AI solutions . Experience integrating AI services or AI models into production systems. Experience building integrations with external AI platforms through APIs. Experience with AI-based transcription, speech-to-text, or related technologies. Experience with ElasticSearch . Experience with public cloud AI services available in AWS, Azure, or GCP. Experience developing or maintaining PHP applications. Previous experience working on SaaS products. Understanding of AI service scalability, monitoring, performance, and cost optimisation. Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People. We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us and be part of a team where great minds, Right Energy, and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within the EU and flexible working hours. High engineering culture with a focus on growth and learning. Opportunity to work on a mature SaaS platform and production AI solutions. Multinational teams. Benefits: Private medical care, Multisport card, and workation opportunities.

🏢 Summary: Senior or Staff Backend Engineer role focused on architecting and scaling AI-native backend systems for a modern accounting platform. The position involves designing distributed services, building high-performance APIs, and establishing engineering standards to support rapid, reliable product delivery. You will work closely with Product, AI, and Operations teams to develop agentic systems and scalable data pipelines. 🗂️ Requirements: 5–10+ years of backend engineering experience, Proven experience designing, building, and operating production backend systems at scale, Strong expertise in API design, Strong expertise in data modelling, Deep understanding of distributed systems trade-offs, Hands-on experience with AWS or GCP in production, Practical experience with CI/CD in high-frequency deployment environments, Experience implementing testing and deployment strategies, Strong knowledge of observability practices, Experience participating in on-call rotations 📃 Skills: TypeScript, Node.js, React, AWS, GCP, Terraform, PostgreSQL, OpenAI, Azure, CI/CD, APIs, DistributedSystems 🏢 Description: ABOUT THE ROLE We're looking for a Senior or Staff Backend Engineer to own and evolve our backend services as we scale. This is a broad, high-impact role — you'll architect new features, build the systems that underpin our core product, and set the engineering standards that shape how the whole team works. The focus is on building a modern, AI-native developer experience. That means working closely with Product, AI, and Operations teams to design agentic systems, distributed data pipelines, and scalable incident response infrastructure — and doing it in a way that lets the team ship with confidence multiple times a day. WHAT YOU'LL WORK ON Architecture and feature design Partner with Product, AI, and Operations teams to architect new features and complex agentic systems. Make clear architectural trade-offs that balance platform, product, and business goals. Backend services and APIs Build and maintain the backend services and APIs that power the core product. Ensure systems are secure, well-tested, and high performance. Distributed systems Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale. Operational excellence Own operational best practices so the team can ship multiple times a day with confidence. Healthy on-call culture and strong observability are part of what you'll build and maintain. Engineering standards Set the bar for writing, communication, and system design across the team. Your influence will shape how a modern AI-native product is built. WHAT WE LOOK FOR 5–10+ years of backend engineering experience A strong track record designing, building, and operating production backend systems at scale. Deep backend fundamentals Expertise in API design, data modelling, and reasoning about distributed systems trade-offs. You understand the nuances, not just the patterns. AWS or GCP hands-on experience Solid understanding of how infrastructure decisions impact application reliability and performance. You've run things in production, not just designed them. CI/CD in practice Practical experience with testing and deployment strategies in high-frequency shipping environments. Observability and on-call maturity A solid grasp of what good observability looks like and how to build healthy on-call practices that don't burn people out. Bonus Experience at an early-stage or scaling startup. Exposure to modern AI and ML systems. Experience shipping product without a dedicated product manager. TECH STACK TypeScript, React, Node.js, AWS, Terraform, PostgreSQL, OpenAI, Azure AI. The team uses GitHub, Slack, Linear, Figma, and Notion day to day. THE TEAM Small, senior, and in-person. The office is in central Wrocław, next to the main train station. The expectation is 4–5 days a week in the office. Relocation support is available for the right candidate. COMPENSATION & BENEFITS Salary $130,000 – $190,000 USD depending on experience, plus competitive equity. Wellness and commute stipend $100 per month. Hardware Premium hardware provided — MacBook Pro and AirPods. Food Daily in-office lunch and dinner. Time off 20 PTO days plus 9 US public holidays. Relocation Support available for candidates relocating to Wrocław.

🏢 Summary: Senior Back End JavaScript Developer role focused on building scalable, event-driven backend services for fraud detection and platform integrity. The position involves full ownership of backend solutions within a cross-functional team, designing and implementing high-volume data processing systems in a cloud-based microservices environment. The work directly supports AI-driven fraud prevention for a large-scale global platform. 🗂️ Requirements: 7+ years of backend software development experience, Strong expertise in JavaScript, TypeScript, and Node.js, Experience with AWS services: API Gateway, Lambda, ECS, SQS, SNS, DynamoDB, Experience with Infrastructure as Code using Terraform or CloudFormation, Knowledge of event-driven and microservices architecture, Experience with Serverless Framework, Proficiency in NoSQL databases (DynamoDB), Proficiency in relational databases (PostgreSQL), Experience with CI/CD pipelines (GitHub Actions), Experience with Docker and container orchestration (ECS or Kubernetes) 📃 Skills: JavaScript, TypeScript, Node.js, AWS, API Gateway, Lambda, ECS, SQS, SNS, DynamoDB, Terraform, CloudFormation, Serverless, PostgreSQL, CI/CD, GitHub, Docker, Kubernetes 🏢 Description: Salary range: B2B - up to 43 E/h + VAT 💰 Ciklum is looking for a Senior Back End JavaScript Developer to join our team and work directly with our partner, Trustpilot in Poland. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About Trustpilot: Trustpilot is on an incredible journey to become the universal symbol of trust. As the world's largest independent consumer review platform, they bring consumers and businesses together to foster transparency and improvement. With over 300 million reviews and 64 million monthly active users, the work we do together has a massive global impact, helping millions of people make better choices every day. About the role: As a Senior Back End JavaScript Developer, become a part of a cross-functional development team engineering experiences of tomorrow. In this role - you are fully integrated into Trustpilot's feature team. You will join a cross-functional "full ownership" squad where you have a say in the direction of projects and technological choices. This specific project enhances trust and transparency by detecting and preventing fraudulent activities, such as fake reviews, and ensuring policy compliance through AI, data analysis, and scalable fraud detection systems. Your work will directly influence the integrity of the platform for over 64 million monthly users! Responsibilities: Collaborative Development: Work alongside Product, Design, and Data Science in a team that owns its product and codebase from end-to-end End-to-End Ownership: Participate in every stage of the lifecycle: from ideation and design to architecture, implementation, deployment, and maintenance System Design: Drive technical decision-making and build scalable backend services and high-volume data processing solutions for fraud detection using TypeScript Scale & Innovation: Build and maintain secure, distributed cloud services within an event-driven microservices architecture, focusing on backend stability and scalability Team Leadership: Support, coach, and inspire your colleagues with your technical expertise and a problem-solving mindset Requirements: We are looking for seasoned engineers who are passionate about high-quality code and technical excellence: Experience: 7+ years of professional software development experience, with a deep focus on backend engineering Core Tech: Strong, hands-on expertise with JavaScript, TypeScript, and Node.js AWS Infrastructure: Proven experience with API Gateway, Lambda, ECS, SQS, SNS, and DynamoDB, utilizing Infrastructure as Code (Terraform or CloudFormation) Architecture: Deep understanding of event-driven and microservice architectures, specifically using the Serverless Framework Databases: Proficiency with NoSQL (DynamoDB) and Relational databases (PostgreSQL) DevOps & Tooling: Experience with CI/CD (GitHub Actions), Docker, and orchestration tools (ECS, Kubernetes) Desirable: Experience integrating AI/ML models or working with LLMs and Generative AI Familiarity with Google Cloud Platform (GCP) services, specifically BigQuery and Pub/Sub What`s in it for you? Remote Collaboration: Enjoy the flexibility of remote work or join us in our office locations across Europe Human Connection: We value a great atmosphere and host team F2F workshops a few times a year to brainstorm and bond in person Continuous Growth: Benefit from a tailored education path, including internal meetups, a Udemy license, and company-paid certifications Comprehensive Care: We offer medical insurance, mental health programs, and a welcoming, open culture Global Reach: Your work will build solutions used by millions to promote trust and transparency online Be bold, not bored! If you're ready to build the heart of trust with a world-class engineering team, we'd love to see your application.

🏢 Summary: Senior Full-stack Engineer role focused on building and modernizing scalable data processing platforms, backend services, and operational reporting systems for fund infrastructure. The position involves developing Python and FastAPI services, managing PostgreSQL and Snowflake environments, and improving monitoring, audit, and data reliability workflows. Candidates will collaborate closely with infrastructure teams while contributing to platform reliability and executive-level insights. 🗂️ Requirements: 5+ years of software development experience, Proficiency in Python, Expertise in FastAPI, Experience with PostgreSQL, Familiarity with Snowflake, Understanding of data accuracy and reliability principles, English proficiency at B2 level or higher 📃 Skills: Python, FastAPI, PostgreSQL, Snowflake, REST, Dagster, Kestra, dbt, React, AGGrid 🏢 Description: We are seeking a Senior Full-stack Engineer to strengthen the operational foundation of the fund by expanding the application and deepening the insights available to the Infrastructure team. Responsibilities Enhance and modernize data ingestion pipelines to support scalable data processing Develop and maintain high-performance REST APIs and backend services using Python and FastAPI Enrich executive-level dashboards and reporting capabilities to support decision-making Improve monitoring and audit workflows to ensure data accuracy, reliability and transparency Maintain operational data storage, application metadata and audit logs within PostgreSQL Support ingestion, financial calculations and historical reporting within Snowflake Orchestrate business logic and service processing to strengthen platform reliability Collaborate with the Infrastructure team to align technical solutions with fund operations Requirements 5+ years of experience in software development Proficiency in Python for business logic, service orchestration and data processing Expertise in FastAPI for building high-performance REST APIs and integration endpoints Skills in PostgreSQL for operational data storage, metadata management and workflow state tracking Familiarity with Snowflake for enterprise data warehousing and analytical workloads Understanding of data accuracy, reliability and transparency principles across platforms English proficiency at B2 level or higher Nice to have Knowledge of Dagster and Kestra for pipeline orchestration, scheduling and workflow automation Familiarity with dbt for modeling, transforming and validating datasets Background in React.js for building responsive user interfaces Skills in AG Grid for data-intensive table interactions in monitoring and approval workflows We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.