Backend Engineer

🏢 Summary: Full-Stack Developer role focused on building and evolving a regulated fintech platform using .NET and modern multi-stack technologies. The position involves full-stack development with React, cloud infrastructure management via Terraform, and integration with external financial services in distributed environments. The role requires delivering secure, production-grade systems within a cloud-native architecture. 🗂️ Requirements: Strong experience with .NET, Experience with React, Experience with cloud platforms, Experience with Terraform, Understanding of distributed systems, Understanding of event-driven architectures, Experience with system integrations, Ability to work across multiple programming languages (Go, Python, Rust, Java) 📃 Skills: .NET, React, Go, Python, Rust, Java, Terraform, AWS, Azure, GCP, PostgreSQL, DynamoDB, CI/CD, Docker 🏢 Description: Full-Stack Developer (.NET / Multi-stack) About Tradevest Tradevest is a BaFin-licensed digital financial infrastructure provider headquartered in Munich, Germany. We deliver banking-as-a-service solutions that enable trading, custody, and management of traditional securities, cryptocurrencies, and tokenized assets — all through a single integrated platform. Our clients include banks, wealth managers, neobrokers, and fintechs across Europe. Our IT development hub is based in Warsaw, where our engineering team meets in the office twice a week. We maintain a hybrid work model because we genuinely believe that in-person collaboration helps us build better products and stronger teams. We're growing rapidly, building serious financial platforms while keeping a relaxed, professional atmosphere where engineers have real ownership over what they build. What you'll do - Develop and evolve an existing fintech platform built on .NET and contribute to new initiatives in other modern stacks - Work across the full stack — from backend services to client-facing interfaces in React - Manage cloud infrastructure using Terraform on (AWS,Azure,GCP) - Integrate with a variety of external financial services, solving complex challenges around asynchronous processing and data synchronization - Deliver production-ready, high-quality systems that meet the strict standards of a regulated fintech environment - Use AI-assisted development tools pragmatically — we're structured in our adoption but always prioritize security and quality What we're looking for - Strong experience with .NET - Openness to working with other languages and stacks — Go, Python, Rust, or Java — depending on project needs - Experience with cloud platforms and infrastructure-as-code (Terraform) - A polyglot mindset — you're comfortable context-switching between technologies and enjoy the variety - Understanding of distributed systems, event-driven architectures, and integration patterns - Ability to deliver independently while being a collaborative team member ## Nice to have - Prior experience in fintech, banking, or other regulated industries - Hands-on experience with Go, Python, or Java in production - Familiarity with PostgreSQL, DynamoDB, or similar data stores - Knowledge of CI/CD pipelines and containerized deployments ## What we offer - Hybrid work model — 2 days/week in our Warsaw office, rest remote - 20 days PTO on B2B - Real impact on financial products used by institutional clients across Europe - Exposure to a diverse, multi-stack tech environment and cloud-native architecture - A team that values engineering growth — we invest in building competences, not just shipping features - Relaxed yet professional culture in a rapidly growing company - Flex-time arrangements

🏢 Summary: Frontend role focused on building and maintaining web and mobile financial applications using React and React Native. The position involves working with TypeScript, improving existing codebases, and contributing to the full development lifecycle from design to deployment. The role requires strong ownership and autonomous architectural decision-making within a hybrid work model. 🗂️ Requirements: 2–4 years of experience with React, 2–4 years of experience with React Native, Strong knowledge of TypeScript, Experience building and deploying web applications, Experience building and deploying mobile applications, Ability to make architectural decisions independently, Experience working with and improving existing codebases, Understanding of full development lifecycle 📃 Skills: TypeScript, React, ReactNative, JavaScript, HTML, CSS, Android, iOS, Git 🏢 Description: About Tradevest Tradevest is a BaFin-licensed digital financial infrastructure provider headquartered in Munich, Germany. We deliver banking-as-a-service solutions that enable trading, custody, and management of traditional securities, cryptocurrencies, and tokenized assets — all through a single integrated platform. Our clients include banks, wealth managers, neobrokers, and fintechs across Europe. Our IT development hub is based in Warsaw, where our engineering team meets in the office twice a week. We maintain a hybrid work model because we genuinely believe that in-person collaboration helps us build better products and stronger teams. We're growing rapidly, building serious financial platforms while keeping a relaxed, professional atmosphere where engineers have real ownership over what they build. What you'll do - Develop and maintain front-end applications across multiple initiatives — internal web apps, public-facing web platforms, and existing Android/iOS mobile apps - Work using Typescript within a React and React Native stack, delivering polished user experiences for financial products - Make sound architectural decisions autonomously while collaborating with experienced colleagues for validation and feedback - Navigate and improve existing codebases — we need someone who enjoys bringing order to complexity, not just greenfield development - Contribute to the full development lifecycle from feature design through deployment What we're looking for - 2-4 years of experience with a solid, demonstrable understanding of React and React Native - Ability to work autonomously and make informed architectural decisions — this role requires ownership, not hand-holding - Experience building and shipping both web and mobile applications - Comfort working with existing codebases — reading, understanding, and improving code others have written - A problem-solving mindset — you enjoy challenges and aren't discouraged by complexity - Good communication skills for collaborating with the team and consulting on technical direction Nice to have - Familiarity with state management solutions (Redux, Zustand, MobX, or similar) - Knowledge of CI/CD pipelines for web and mobile deployments - Prior experience in fintech or other regulated industries - Experience with app store submission processes (Google Play, App Store) What we offer - Hybrid work model — 2 days/week in our Warsaw office, rest remote - 20 days PTO on B2B - Variety of front-end challenges — internal tools, public platforms, and mobile apps, all within one role - Autonomy with support — make real decisions backed by an experienced team - A team that values engineering growth — we invest in building competences, not just shipping features - Relaxed yet professional culture in a rapidly growing company - Flex-time arrangements

🏢 Summary: QA Engineer role focused on testing and safeguarding fintech platforms covering APIs, web, and mobile applications in a regulated financial environment. The position combines manual and automated testing, building regression suites, and collaborating with stakeholders to ensure high-quality trading and custody workflows. The role also explores AI-assisted testing to improve coverage and efficiency. 🗂️ Requirements: Experience in manual testing of APIs, web applications, and mobile apps, Experience in automated testing and building regression test suites, Ability to design test strategies based on complex business requirements, Understanding of software testing processes in regulated environments, Strong collaboration with developers and business stakeholders, Ability to work in hybrid model (Warsaw office twice a week) 📃 Skills: API, Web, Android, iOS, Selenium, Cypress, Appium, Playwright, Postman, REST, Ginkgo, Gomega, Cucumber, BDD, Automation, Regression, AI 🏢 Description: About Tradevest Tradevest is a BaFin-licensed digital financial infrastructure provider headquartered in Munich, Germany. We deliver banking-as-a-service solutions that enable trading, custody, and management of traditional securities, cryptocurrencies, and tokenized assets — all through a single integrated platform. Our clients include banks, wealth managers, neobrokers, and fintechs across Europe. Our IT development hub is based in Warsaw, where our engineering team meets in the office twice a week. We maintain a hybrid work model because we genuinely believe that in-person collaboration helps us build better products and stronger teams. We're growing rapidly, building serious financial platforms while keeping a relaxed, professional atmosphere where engineers have real ownership over what they build. ## What you'll do - Test multiple platforms across a wide range of technologies — from manual API testing and web app validation to mobile app testing on Android and iOS - Build and maintain automated regression test suites to safeguard critical financial workflows - Explore and implement AI-assisted testing approaches to increase coverage and efficiency - Collaborate closely with business stakeholders on user story refinement and acceptance criteria - Support documentation management and serve as a key point of contact for clients - Bring a detail-oriented, analytical mindset to a highly regulated environment where precision directly impacts trust ## What we're looking for - Experience in manual and automated testing across APIs, web applications, and mobile apps - A meticulous, detail-oriented approach — in fintech, the details matter - Ability to quickly understand complex business domains and translate requirements into thorough test strategies - Strong communication skills — you'll work with developers, business analysts, and external clients - A proactive mindset — our QA engineers are not just testers, they're active participants in shaping the product - Eagerness to learn and adapt — you'll ramp up quickly on trading markets, financial regulations, and platform-specific knowledge ## Nice to have - Prior experience in fintech, banking, or other regulated industries - Understanding of EU trading markets and associated regulations (MiFID II, KYC/AML) - Experience with test automation frameworks (Selenium, Cypress, Appium, Playwright, or similar) - Familiarity with API testing tools (Postman, REST Assured, or similar) - Experience with BDD frameworks (Ginkgo/Gomega, Cucumber, or similar) ## What we offer - Hybrid work model — 2 days/week in our Warsaw office, rest remote - 20 days PTO on B2B - A role that goes beyond testing — real influence on product quality, client relationships, and business processes - Exposure to diverse platforms and technologies in a fast-moving fintech environment - A team that values growth — we invest in building competences and support continuous learning - Relaxed yet professional culture in a rapidly growing company - Flex-time arrangements

🏢 Summary: Mid-level Backend Engineer role focused on building a cutting-edge FinTech platform for interbank intraday lending using Scala in an agile startup environment. The position involves delivering scalable, testable solutions through functional programming and TDD practices. The engineer will collaborate closely with the product team to incrementally develop and enhance the platform. 🗂️ Requirements: 3+ years of software development experience, Proficiency in Scala or similar language (e.g., Haskell), Understanding of reactive programming paradigms, Understanding of functional programming paradigms, Experience working in Agile environment, Experience working within Scrum framework, Ability to write testable, deployable and scalable code 📃 Skills: Scala, Haskell, Reactive, Functional, TDD, Scrum, Agile, Blockchain, DLT 🏢 Description: Are you a passionate backend engineer ready to take your skills to the next level? Join our Product Team as we build a cutting-edge FinTech platform for interbank intraday lending. This is your chance to be part of a dynamic, VC-backed startup and play a key role in shaping both our product and our company. Why Join Us? Fast-Paced Startup : Collaborate with a smart, agile team led by our hands-on technical co-founder. Your contributions will have a direct impact on our growth. Remote-First with a Weekly Anchor: Work remotely four days a week, and meet up with the team once a week at our Wrocław office to sync, collaborate in person, and keep the momentum going. Ownership : Receive equity options and be a true stakeholder in our success. Flexibility : Take advantage of a holiday schedule that isn’t tied to any specific country. Inspiring Team Off-Sites : Twice a year, we bring the entire team together for week-long off-sites in exciting locations (think Budapest, Bordeaux, Malta, and beyond). Modern AI-Augmented Workflow: We use Claude Code daily and invest in tooling that lets our engineers focus on the interesting problems. What You’ll Do Collaborate with our team to deliver incremental value through agile, systematic development cycles. Write clean, reusable, and efficient functional code using Scala , following TDD and engaging in pair-programming as needed. Ensure our solutions are testable, deployable , and scalable . Who You Are We’re looking for a proactive, mid-level backend engineer with: 3+ years of software development experience . Proficiency in Scala , or similar languages (e.g., Haskell ). A solid understanding of reactive and/or functional programming paradigms . Knowledge of Agile principles and experience working within the Scrum framework . (Nice-to-have) Experience using AI coding assistants effectively in a professional setting — knowing how to prompt well, scope tasks, and review AI-generated code critically. (Nice-to-have) An interest in or experience with blockchain/DLT technologies . (Bonus) A degree in Computer Science or a related field. About Us We are a forward-thinking FinTech startup backed by leading venture capital. Our mission is to revolutionize interbank lending through innovative technology. Agile principles guide our work, and we are committed to fostering a supportive, growth-oriented culture. If you’re excited about solving complex challenges, making an impact, and working in an environment that values both technical excellence and collaboration, we want to hear from you! Ready to Join? Apply now and start shaping the future of finance with us.

🏢 Summary: Backend-focused developer role working on risk management software for financial institutions, with primary development in Python and exposure to multiple languages and cloud platforms. The position involves implementing new functionalities, customizing solutions to client needs, and contributing to complex financial systems in international teams. It offers high-impact technical work in commodities trade risk assessment within a multi-cloud environment. 🗂️ Requirements: Degree in Computer Science, Mathematics, Physics or related field, Advanced knowledge of software design, Strong understanding of data structures, Strong understanding of algorithms, Advanced proficiency in Python, Ability to read and modify code in multiple programming languages, Exposure to multiple programming languages and paradigms, Experience working with cloud platforms, Good communication skills for working with customers 📃 Skills: Python, C++, Go, Rust, TypeScript, AWS, Azure, GCP, Algorithms, DataStructures, CloudComputing 🏢 Description: The StratsLab Difference: Why You Should Read This We were founded in 2015 by alumni of the Warsaw University MIM Faculty, who spent years sharpening their skills at top-tier investment banks and hedge funds in London. We brought that exclusive, high-impact culture back to Warsaw. Developer-Driven : You will be surrounded by top-notch Developers who genuinely love to code. We prioritize writing new code over maintaining legacy systems. Unique Domain : You'll gain unique, marketable skills working directly in the highly specialized area of commodities trade risk assessment. This isn't generic IT - it's highly challenging and intellectually rewarding. Real Impact : You will have independent, responsible tasks and will have a chance to implement your ideas, seeing the immediate effects of your work on complex financial systems. Our Roots & Your Fast Track We are proud of our origins. Since many of us are alumni of UW (JSIM, CS, Math, Physics) ,  Matex at Staszic and finalists of the Informatics or Mathematics Olympics , we know what it takes to get there. If you share this background, just apply and we guarantee you an intro call. We speak the same language, so let’s skip the formalities. While we value our roots, we value exceptional engineering even more. If you are a high-calibre developer from a different path, your skills are the only credential that matters. Apply and let your code do the talking. Your Role: You will be working in international teams, serving customers from financial institutions. You will participate in the implementation of risk management software: adjusting it to customers' requirements and developing new functionalities & applications. Technical Focus: The backend is mainly in Python. You can expect to spend around 70%+ of your development time in Python , with exposure to C++, Go, Rust and TypeScript. We are multi-cloud and are currently in production with AWS and Azure. Code Flexibility: We expect you to be able to be comfortable reading code in any language. We do not expect you to be an expert in all of them, but we do require you to be OK with doing a minor change from time to time in a tech stack you aren't using daily (don't worry, it will be reviewed before merging). What makes you the right fit? We are looking for specialists whose expertise is built upon a rigorous academic foundation and proven technical skill: Academic Foundation: A degree in Computer Science, Mathematics, Physics or other relevant field. Core Skills: Advanced knowledge of software design, data structures and algorithms . Technical Breadth: Exposure to multiple programming languages and paradigms. Communication: Good interpersonal and communication skills with openness to work with customers. Experience: Financial knowledge and/or experience in financial markets will be an advantage. Familiarity with cloud computing such as AWS / Azure / GCP is a plus. The Offer: We believe that high-calibre work deserves exceptional support: Compensation: Base salary plus a bonus twice a year. Your role and salary are based on your skills and how fast you learn, not just your old job title. Professional Growth : You will work closely with experts and gain exposure to top financial institutions as a natural part of your day. Being in this team means you share knowledge with exceptional programmers and grow your expertise through your daily interactions. Office : Powiśle, Warsaw. Flexible working hours. International business trips for volunteers. The next step: our selection process If all goes well, we are going to spend a lot of time together. Our process aims to ensure both you and us know what we are getting into: Informal Introduction: You will start with a casual chat with our Founders to see if we are a good fit for each other. Technical Assessment: You will do a technical task so we can see how you code and solve problems. Team Engagement: You will meet the team and talk about the role directly with the people you would be working with.

🏢 Summary: Backend Developer role in a global digital asset trading firm, working remotely on live production trading systems and infrastructure. The position focuses on backend services, exchange integrations, real-time market data processing, and reliability improvements within a small, highly technical team. It offers direct impact on trading operations and close collaboration with trading infrastructure in a crypto-focused environment. 🗂️ Requirements: Degree in Computer Science, Electrical Engineering, Software Engineering or related field, Hands-on experience with Python, C++ or another backend/systems language, Understanding of APIs, integrations and production systems, Experience with Linux and debugging, Strong problem-solving skills, Interest in trading systems, financial markets or crypto infrastructure, Very good English proficiency 📃 Skills: Python, C++, REST, WebSocket, Linux, Docker, SQL, PostgreSQL, Redis, Kafka, ClickHouse, APIs, Networking, Concurrency, Algorithms 🏢 Description: Location: 100% remote from Poland Contract: B2B Budget: 10,700–21,400 PLN net + VAT / month Seniority: Junior+ / Mid Industry: digital assets / trading systems We are supporting a global digital asset trading firm in hiring a Backend Developer to join a small, highly technical engineering team working on live production trading systems. You will be working close to trading infrastructure, exchange connectivity, real-time data, reliability, and internal tools used in a production trading environment. The company operates internationally and is now expanding its presence in Poland. What you will work on Depending on your experience and strengths, you may be involved in: building and improving backend services supporting trading operations, integrating with external APIs and crypto exchanges, working with REST / WebSocket APIs, processing real-time market data, improving reliability of production systems, debugging issues in live trading infrastructure, building internal tools and automation for trading operations, collaborating closely with a small technical team. What we are looking for We are looking for someone with strong backend or systems engineering foundations who enjoys solving technical problems and wants to work closer to trading infrastructure. You may be a good fit if you have: a degree in Computer Science, Electrical Engineering, Software Engineering or a closely related technical field , hands-on experience with Python good understanding of APIs, integrations and production systems, experience with Linux and debugging technical issues, strong problem-solving skills and ability to explain your thinking clearly, interest in trading systems, financial markets, crypto infrastructure or real-time systems, very good English - the recruitment process and daily cooperation are in English . Nice to have Any of the following would be a strong plus: experience with trading systems, market data, order books or exchange connectivity, experience with crypto, blockchain, DeFi, market-making, arbitrage or digital assets, experience with WebSocket APIs and real-time data flows, experience with low-latency, high-throughput or performance-sensitive systems, knowledge of algorithms, data structures, concurrency, networking or distributed systems, experience with Docker, SQL, PostgreSQL, Redis, Kafka, ClickHouse or similar technologies. Why this role may be interesting 100% remote setup, B2B cooperation, direct impact on live production trading systems, small technical team with strong ownership, opportunity to work close to crypto trading infrastructure, practical engineering work, not only feature delivery, environment where problem-solving, technical clarity and ownership matter. Sounds interesting? Apply and share your CV. We will contact selected candidates with more details about the company, role and next steps.

🏢 Summary: Backend Engineer role focused on building and maintaining high-performance financial ledger services that bridge traditional banking systems (ACH, WIRE, SEPA) with blockchain-based stablecoins. The position involves developing secure on-ramp and off-ramp pipelines, queue-based transaction processing, and integrations with banking and compliance infrastructure. The engineer will work on end-to-end integrations and testing within a TypeScript/Node.js environment. 🗂️ Requirements: Strong TypeScript skills with focus on type safety, Experience integrating banking or payment APIs (ACH, WIRE, BaaS), Experience with asynchronous pipeline architectures and queues, Understanding of blockchain concepts (minting, burning, transaction signing, permissions), Ability to write end-to-end integration tests against real APIs, Experience managing third-party service integrations 📃 Skills: TypeScript, Node.js, PostgreSQL, Vitest, ACH, SEPA, WIRE, Blockchain, Queues, KYC, API 🏢 Description: Backend Engineer (TypeScript) We're building a high-performance financial ledger connecting fiat payment rails and blockchains through service providers. We're looking for a backend engineer to work on integrations that bridge traditional banking (ACH, WIRE, SEPA) with on-chain stablecoins. What You'll Work On Building and maintaining services that connect Banking-as-a-Service providers to our network Implementing on-ramp (fiat to tokens) and off-ramp (tokens to fiat) pipelines with strong idempotency guarantees Designing queue-based processing pipelines for multi-step financial transactions Working with identity/compliance infrastructure: KYC certificates, selective disclosure, encrypted attribute sharing Publishing service metadata for decentralized discovery by wallets and other services Writing integration tests against real APIs and a local blockchain node Tech Stack TypeScript / Node.js (ESM) PostgreSQL Vitest Custom SDK ecosystem What We're Looking For Strong TypeScript skills with emphasis on type safety Experience integrating with banking/payment APIs (ACH, wire transfers, BaaS platforms) Comfort with asynchronous pipeline architectures (queues, retries, idempotency) Understanding of blockchain concepts (token minting/burning, on-chain permissions, transaction signing) Preference for integration tests over unit tests; ability to write tests that exercise real system behavior end-to-end Familiarity with explicit resource management patterns (AsyncDisposable, structured cleanup) Experience working with different third-party integrations Nice to Have Experience with KYC/KYB compliance flows and certificate-based identity Multi-currency system design (FX, per-currency fee structures, decimal handling) How We Work Strong code ownership Small team, high autonomy, direct impact on financial infrastructure Straightforward Recruitment: We respect your time. Our 2-step recruitment process is designed to be efficient and meaningful. Flexible Work Environment: Work from anywhere. Align with sprint goals and deliverables - we trust you to manage your productivity.

🏢 Summary: Contract B2B role for a senior engineer to rebuild a 401(k) retirement plan administration platform from scratch with an AI-native foundation, owning end-to-end delivery across AWS infrastructure, JVM backend, and TypeScript frontend. The position involves architectural decision-making, close collaboration with US-based stakeholders, and translating complex financial domain rules into scalable software. Strong emphasis on AI-assisted engineering practices and greenfield system design in a regulated, transactional environment. 🗂️ Requirements: 7+ years professional software engineering experience, Senior or staff-level system design experience, Strong JVM backend experience (Kotlin, Java, or Scala), Solid TypeScript frontend experience (React, Angular, or similar), Production experience with AWS, Deep understanding of VPCs, IAM, RDS, Lambda or ECS, Experience with Infrastructure as Code (Pulumi, Terraform, or CDK), Experience designing non-trivial distributed systems, Fluent English, Experience in regulated or transactional domains, Ability to work with US East Coast time overlap 📃 Skills: Kotlin, Java, Scala, TypeScript, React, Angular, AWS, VPC, IAM, RDS, Lambda, ECS, Pulumi, Terraform, CDK, Claude, Cursor, CI/CD, Python 🏢 Description: Vecten | Client: US-based, retirement plan administration | Remote (Poland-based) | Contract / B2B We are an AI-native data and technology partner for private capital and healthcare. Founded in 2010 and headquartered in Warsaw, we work with leading PE firms, VC funds, and healthcare organizations to build proprietary data infrastructure, deploy AI solutions, and drive AI-native transformation. Our clients manage a cumulative $210B+ in assets. Our average engagement runs five years. Our NPS sits above 80. We don't need to claim credibility — we can show it. We've also done to ourselves what we now do for clients. We've restructured our own company around AI — tools, policies, roles, delivery models. This isn't a pitch. It's a playbook we've already run, and we're hiring the engineers who will run it for others. - Financial Platform Rebuild - You'd be joining a small, senior team rebuilding a 401(k) plan administration platform from the ground up. The existing system was built and operated by a third party; the client is taking ownership and rebuilding it greenfield with a strong AI-native foundation. This is not a ticket-taking role. You'll sit in product conversations with business users, push back on requirements, propose architectural directions, and own end-to-end delivery from infrastructure to UI. The client is US-based with engineers on both coasts. Working hours need meaningful overlap with US East Coast (afternoon CET works well). What you'd be doing Designing and building the core platform: event processing for money math, plan configuration, eligibility rules, and the supporting services around them. Owning vertical slices end-to-end – AWS infrastructure, Kotlin backend, TypeScript frontend. Acting as a thought partner on architecture decisions still being made (IaC choice, service boundaries, data model). Interviewing internal subject-matter experts to translate domain knowledge into working software. Setting the bar for AI-native engineering practices – how the team uses Claude Code, Cursor, agents, and what good looks like. Logistics Engagement model: Contract via Vecten (B2B), initial 3–6 month commitment with strong likelihood of extension. Hardware: Vecten provides a managed, secured environment. Interview process: Vecten internal screen → tech screen with the client's tech lead → live coding session (likely screen-share, AI-assisted format) → culture call. Start: Ideally within 2–4 weeks. Must-have 7+ years of professional software engineering experience , with a meaningful track record of senior or staff-level work. Strong backend engineering on the JVM – Kotlin, Java, or Scala in production. Kotlin experience preferred; if you have strong Java/Scala and have shipped Kotlin on a side project, that works. Solid TypeScript on the frontend – React, Angular, or similar, enough to own UI slices without needing a dedicated frontend pair. Solid cloud infrastructure fundamentals – you've reasoned about networking, IAM, compute, and managed services for real systems and can defend the trade-offs. Architecture chops – you've designed non-trivial systems, can defend trade-offs, and are comfortable disagreeing when you think someone's wrong. English fluency – you'll be talking to business users and engineers daily. Strongly preferred AI-native fluency – you actively use Claude Code, Cursor, or equivalent agents in your daily workflow. You can talk specifically about what you delegate, what you don't, and why. AWS in production – not just "deployed something once". Deep familiarity with VPCs, IAM, RDS, Lambda/ECS trade-offs on real workloads. IaC experience – Pulumi, Terraform, or CDK. Background in regulated or transactional domains – fintech, payments, healthcare, insurance, ERP, billing systems. Anything where audit trails, eligibility rules, and money math matter. Comfort working in greenfield ambiguity – you've been the second or third engineer on a platform before and know how to make progress when half the decisions aren't made yet. Nice to have Direct retirement / pensions / 401(k) experience – the unicorn profile. If you have it, lead with it. DevOps depth – you've owned CI/CD pipelines, observability stacks, and on-call rotations. Python data-stack background – likely to become relevant as analytics and reporting work comes online. What we're not asking for A specific number of years on Kotlin, AWS, or any one tool. We care about depth of judgment, not box-ticking. Front-end specialisation. You don't need to debate React Server Components – you need to ship working UI. Big-bank or HFT pedigree. This is retirement plan administration, not trading. Benefits Unrestricted AI Stack & Premium Gear: Fully paid licenses for Cursor, Claude Pro, etc. Work with a talented team redefining the global perception of Poland Flexible working hours and remote work options Comfortable office in central Warsaw with all essential tools Multisport card & private medical care A culture of feedback – evaluation meetings, mentoring, and career growth opportunities Frontier Engineering Culture: Build alongside elite engineers who are shipping systems that drive real investment decisions. Backed by continuous growth and a strong knowledge-sharing culture ( check our YouTube ). Sounds like a perfect place for you? Don’t hesitate to click apply and submit your application today!

🏢 Summary: Contract role for a senior engineer to rebuild a 401(k) plan administration platform from scratch with an AI-native foundation. The position involves end-to-end ownership of architecture and delivery across AWS infrastructure, Kotlin backend, and TypeScript frontend in close collaboration with US-based stakeholders. You will shape system design decisions and implement core financial domain logic in a greenfield environment. 🗂️ Requirements: 7+ years professional software engineering experience, Strong JVM backend experience (Kotlin, Java, or Scala) in production, Hands-on TypeScript frontend experience (React, Angular, or similar), Production experience with AWS and cloud infrastructure design, Experience designing non-trivial system architectures, IaC experience (Pulumi, Terraform, or CDK), Experience in regulated or transactional domains (fintech, payments, healthcare, insurance, ERP, billing), Ability to work with US East Coast time overlap, Fluent English, Experience using AI coding tools in daily workflow 📃 Skills: Kotlin, Java, Scala, TypeScript, React, Angular, AWS, VPC, IAM, RDS, Lambda, ECS, Pulumi, Terraform, CDK, Claude, Cursor, CI/CD, Python 🏢 Description: Vecten | Client: US-based, retirement plan administration | Remote (Poland-based) | Contract / B2B We are an AI-native data and technology partner for private capital and healthcare. Founded in 2010 and headquartered in Warsaw, we work with leading PE firms, VC funds, and healthcare organizations to build proprietary data infrastructure, deploy AI solutions, and drive AI-native transformation. Our clients manage a cumulative $210B+ in assets. Our average engagement runs five years. Our NPS sits above 80. We don't need to claim credibility — we can show it. We've also done to ourselves what we now do for clients. We've restructured our own company around AI — tools, policies, roles, delivery models. This isn't a pitch. It's a playbook we've already run, and we're hiring the engineers who will run it for others. - Financial Platform Rebuild - You'd be joining a small, senior team rebuilding a 401(k) plan administration platform from the ground up. The existing system was built and operated by a third party; the client is taking ownership and rebuilding it greenfield with a strong AI-native foundation. This is not a ticket-taking role. You'll sit in product conversations with business users, push back on requirements, propose architectural directions, and own end-to-end delivery from infrastructure to UI. The client is US-based with engineers on both coasts. Working hours need meaningful overlap with US East Coast (afternoon CET works well). What you'd be doing Designing and building the core platform: event processing for money math, plan configuration, eligibility rules, and the supporting services around them. Owning vertical slices end-to-end – AWS infrastructure, Kotlin backend, TypeScript frontend. Acting as a thought partner on architecture decisions still being made (IaC choice, service boundaries, data model). Interviewing internal subject-matter experts to translate domain knowledge into working software. Setting the bar for AI-native engineering practices – how the team uses Claude Code, Cursor, agents, and what good looks like. Logistics Engagement model: Contract via Vecten (B2B), initial 3–6 month commitment with strong likelihood of extension. Hardware: Vecten provides a managed, secured environment. Interview process: Vecten internal screen → tech screen with the client's tech lead → live coding session (likely screen-share, AI-assisted format) → culture call. Start: Ideally within 2–4 weeks. Must-have 7+ years of professional software engineering experience , with a meaningful track record of senior or staff-level work. Strong backend engineering on the JVM – Kotlin, Java, or Scala in production. Kotlin experience preferred; if you have strong Java/Scala and have shipped Kotlin on a side project, that works. Solid TypeScript on the frontend – React, Angular, or similar, enough to own UI slices without needing a dedicated frontend pair. Solid cloud infrastructure fundamentals – you've reasoned about networking, IAM, compute, and managed services for real systems and can defend the trade-offs. Architecture chops – you've designed non-trivial systems, can defend trade-offs, and are comfortable disagreeing when you think someone's wrong. English fluency – you'll be talking to business users and engineers daily. Strongly preferred AI-native fluency – you actively use Claude Code, Cursor, or equivalent agents in your daily workflow. You can talk specifically about what you delegate, what you don't, and why. AWS in production – not just "deployed something once". Deep familiarity with VPCs, IAM, RDS, Lambda/ECS trade-offs on real workloads. IaC experience – Pulumi, Terraform, or CDK. Background in regulated or transactional domains – fintech, payments, healthcare, insurance, ERP, billing systems. Anything where audit trails, eligibility rules, and money math matter. Comfort working in greenfield ambiguity – you've been the second or third engineer on a platform before and know how to make progress when half the decisions aren't made yet. Nice to have Direct retirement / pensions / 401(k) experience – the unicorn profile. If you have it, lead with it. DevOps depth – you've owned CI/CD pipelines, observability stacks, and on-call rotations. Python data-stack background – likely to become relevant as analytics and reporting work comes online. What we're not asking for A specific number of years on Kotlin, AWS, or any one tool. We care about depth of judgment, not box-ticking. Front-end specialisation. You don't need to debate React Server Components – you need to ship working UI. Big-bank or HFT pedigree. This is retirement plan administration, not trading. Benefits Unrestricted AI Stack & Premium Gear: Fully paid licenses for Cursor, Claude Pro, etc. Work with a talented team redefining the global perception of Poland Flexible working hours and remote work options Comfortable office in central Warsaw with all essential tools Multisport card & private medical care A culture of feedback – evaluation meetings, mentoring, and career growth opportunities Frontier Engineering Culture: Build alongside elite engineers who are shipping systems that drive real investment decisions. Backed by continuous growth and a strong knowledge-sharing culture ( check our YouTube ). Sounds like a perfect place for you? Don’t hesitate to click apply and submit your application today!

🏢 Summary: Senior Cybersecurity Fullstack Python Engineer role focused on building and securing scalable banking and cloud-based applications within a global financial environment. The position involves developing secure microservices, REST APIs, and containerized deployments while embedding cybersecurity controls across the software lifecycle. The role combines full-stack development, cloud infrastructure, and security engineering in a hybrid work model. 🗂️ Requirements: Minimum 6 years of full-stack or backend development experience in banking, security, or fintech, Proven experience with Python web frameworks (FastAPI, Flask, or Django), Strong knowledge of microservice architecture (CQRS, SAGA, event sourcing), Experience with Docker and Kubernetes deployments, Proficiency in SQL databases (PostgreSQL or MSSQL), Experience with BigQuery or RedShift, Solid Linux administration skills, Knowledge of TCP/IP, DNS, firewalls, and networking fundamentals, Experience with HTML, CSS, JavaScript, and React, Experience with automated testing frameworks and TDD, Knowledge of Git version control, Understanding of Agile and DevSecOps processes, Fluent English, Legal right to work in the EU 📃 Skills: Python, FastAPI, Flask, Django, Docker, Kubernetes, PostgreSQL, MSSQL, BigQuery, RedShift, Linux, TCP/IP, DNS, HTML, CSS, JavaScript, React, Git, Kafka, RabbitMQ, AWS, GCP, Azure, Alibaba, Terraform, Prometheus, MongoDB 🏢 Description: Unleash the Power of Secure Innovation — Shape the Future of Banking and Cloud Security! Krakow or Warsaw-based opportunity with hybrid work model (6 days per month from the office). As a Senior Cybersecurity Fullstack Python Engineer , you will be working for a leading global bank, helping to develop and fortify digital banking solutions and cybersecurity infrastructures. Join a mission-driven team committed to safeguarding financial systems and enabling secure, innovative banking experiences worldwide. Your main responsibilities: Design, develop, and deploy scalable and secure full-stack applications focusing on banking and cloud security. Collaborate with cybersecurity experts to implement and enhance security controls within software solutions. Build and maintain RESTful APIs and data pipelines, ensuring robust security measures are integrated from the ground up. Support and troubleshoot existing services, including bug fixing, automated testing, and technical documentation. Lead peer reviews and mentor junior engineers to uphold high-quality coding standards. Implement containerized deployments using Docker and Kubernetes, maintaining seamless integration within cloud environments. Contribute to continuous improvement of development processes, emphasizing automation, efficiency, and security best practices. You're ideal for this role if you have: Minimum of 6 years of experience in full-stack or backend development within the banking, security, or fintech sectors. Proven expertise in Python web frameworks such as FastAPI (preferred), Flask, or Django. Deep understanding of microservice architecture, including CQRS, SAGA, and event sourcing. Strong experience deploying services with Docker and Kubernetes. Proficiency in SQL databases (PostgreSQL, MSSQL) and big data warehouse technologies like BigQuery or RedShift. Solid Linux sysadmin skills, alongside knowledge of TCP/IP, DNS, firewalls, and network fundamentals. Familiarity with frontend technologies such as HTML, CSS, JavaScript, and React. Experience with automated testing frameworks and a test-driven development mindset. Good understanding of agile, DevSecOps delivery processes, tools like Jira, Confluence, and version control systems including Git. Excellent verbal and written communication skills in English. It is a strong plus if you have: Cybersecurity-specific experience, including working with SAST/DAST tools, penetration testing, fuzz testing, or threat detection. Cloud platform expertise with AWS, GCP, Azure, or Alibaba, using tools like Terraform and Prometheus. Experience with message queue systems like Kafka or RabbitMQ. Frontend frameworks such as React, alongside UX/design experience. Database management skills with MongoDB or other NoSQL solutions. Language Required for the role: Fluent English — excellent communication skills are essential. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. We offer you: ITDS Business Consultants is involved in various, innovative, and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people. The offer includes: Stable and long-term cooperation with very good conditions Enhance your skills and develop your expertise in the financial industry Work on the most strategic projects available in the market Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years Participation in Social Events, training, and work in an international environment Access to an attractive Medical Package Access to Multisport Program #GETREADY Internal job ID #8923 You can report violations in accordance with ITDS’s Whistleblower Procedure available here .