Senior Fullstack Software Engineer - Portfolio Data Workflows

Addepar is looking for a Senior Fullstack Software Engineer in Poland to focus on Portfolio Data Workflows. This position centers on designing and building solutions that strengthen portfolio management features for clients. Role overview This role involves developing and implementing software that improves how portfolio data is managed and processed. Working closely with cross-functional teams, you will help deliver reliable and effective tools that support client needs. Collaboration Expect to work alongside engineers, product managers, and other stakeholders to ensure software quality and alignment with business goals. Communication and teamwork are key parts of the day-to-day work. What you will do Design and implement solutions for portfolio data workflows Enhance portfolio management capabilities through fullstack development Collaborate with various teams to deliver high-quality software

Addepar is looking for a Senior Software Engineer to join the Portfolio Services team in Poland. This position centers on designing and building solutions that help clients manage their investment portfolios. Role overview This role involves contributing to the development and improvement of software systems that support portfolio management. The work includes collaborating with colleagues from different teams to refine system architecture and boost performance. What you will do Design and implement software features for portfolio services Work with cross-functional teams to enhance system architecture Focus on delivering high-quality, scalable solutions Requirements Experience in software development Ability to collaborate with diverse teams Commitment to quality and scalable systems

The Portfolio Data Engineer position at Addepar centers on shaping financial data into clear, useful insights. This work supports clients as they manage investments and make informed decisions. Role overview Collaboration is key in this role. The Portfolio Data Engineer works closely with teams from different areas to build and maintain data pipelines. These pipelines help ensure that financial data remains accurate and easy to access. What you will do Develop and refine data pipelines for financial datasets Work with colleagues across functions to align data solutions with business needs Focus on data accuracy and accessibility to support client investment management Location This position is based in Poland.

Why Join Housecall Pro?At Housecall Pro, we are on a mission to create solutions that enhance the lives of home service professionals across the United States. Our commitment is to assist these professionals in optimizing their operations, growing their businesses, and ultimately enjoying more time with their families. We believe in the Pro, and every day, we strive to make a significant impact in their lives.Although our headquarters is located in Denver, Colorado, our diverse team stretches across the globe, including talented individuals from Brazil, Poland, the Philippines, Mexico, and more. We prioritize our customers and cultivate a work culture where our company, our team members, and our Pros can thrive together, regardless of their location. Our leadership is deeply invested in the career growth of each team member, expecting them to contribute innovatively to our mission.We also provide:Generous paid holidays and flexible time off policiesA culture that champions innovation and welcomes big ideas from everyoneA MacBook setup ready from day one, plus a $500 stipend to create your ideal workspaceWork hours aligned with Central European Time (CET) for a balanced scheduleEquity in a fast-growing startup supported by leading venture capitalistsAbout the RoleAs a Senior Fullstack Software Engineer, you will leverage your strong engineering fundamentals and problem-solving skills to navigate complex systems effectively. Your focus will be on systems thinking, scalable architecture, and writing clean, maintainable code that provides genuine value to our customers. In this position, you will lead technical decision-making processes, drive projects from conception through to production, and collaborate closely with product, design, and engineering teams to create impactful user experiences.You will play a pivotal role in defining and advocating for technical best practices, enhancing the quality of our systems, and mentoring other engineers as our team expands. Our engineering culture is characterized by passion, empathy, and a collective mission of improving the lives of our service professionals. Your contributions will be vital in enabling their success and fortifying the foundation of our product for years to come.Compensation: $6,500 - $8,000 USD per month (B2B)What You Will Do

Join our dynamic team at Inetum2 as a Senior Fullstack Software Engineer, where you'll be at the forefront of developing innovative software solutions. In this role, you will leverage your expertise in both frontend and backend technologies to build scalable applications that enhance user experience. Collaborate with cross-functional teams to design, develop, and maintain high-quality software products.

Box creates Intelligent Content Management solutions that support collaboration, content lifecycle management, and information security for organizations worldwide. Since its founding in 2005, Box has worked with companies such as JLL, Morgan Stanley, and Nationwide. Headquartered in Redwood City, California, Box also maintains offices across the United States, Europe, and Asia. Every day, Box manages millions of files and data exchanges, including contracts and HR documents. The company’s mission centers on bringing intelligence to content management, enabling customers to streamline business workflows. Engineers at Box play a key role in applying AI to real-world collaboration challenges. Role overview The Relay Experience team in Warsaw focuses on improving workflow automation for Box users. Relay automates routine tasks for many large enterprises, helping users save time and maintain consistency across processes. This team is seeking a Senior Software Engineer who will take ownership of major system components, contribute independently, and help refine the experience for millions of Relay users each day.

At Affirm, we're revolutionizing credit to enhance transparency and accessibility, empowering consumers to buy now and pay later without hidden fees or compounding interest.Be part of our innovative Servicing International team, pivotal to Affirm's global expansion, as we develop the core platform to introduce our offerings to a new era of international markets. This position will concentrate on purchase protection, including disputes and refunds—a vital component of the user journey and an area of substantial investment—to foster trust and satisfaction among our newest customers. Success in this role demands close collaboration; you will work alongside our European engineering teams and engineers from our global Servicing Engineering organization to create cohesive, scalable solutions. If you are driven by a passion for crafting exceptional user experiences and are excited about the prospect of launching products in new regions, we invite you to join us. Help shape the future of Affirm's platform and establish our global presence.Key ResponsibilitiesLead your team in achieving quarterly objectives, guiding engineers through ambiguity to address open-ended challenges while ensuring continuous support throughout the delivery process.Collaborate with peers and stakeholders in the product development lifecycle, engaging with product management, design, and analytics to participate in ideation and articulate technical constraints, while making decisions that appropriately weigh risks and trade-offs.Proactively identify and advocate for solutions to project, process, technology, or business issues.Monitor and support the operations and availability of your team's deliverables by establishing metrics, escalating issues when necessary, and contributing to ongoing maintenance and on-call responsibilities.Promote a culture of quality and ownership within your team by enhancing code review and design standards and advocating for best practices through documentation and technical presentations.Mentor and develop team talent by providing feedback, guidance, and leading by example.QualificationsMinimum of 4 years of experience as a software engineer.Proficient in designing, developing, and deploying backend systems at scale using technologies such as Python, Kotlin, AWS, MySQL, and Kubernetes.Experienced in delivering web applications with declarative UI frameworks like React or Vue.Skilled in defining a technical blueprint for significant feature or system component delivery with an emphasis on elegant, simple, and extensible design.

Join Box Inc. as a Senior Fullstack Software Engineer and take the next step in your career! We are looking for an experienced engineer who is passionate about building scalable web applications and innovative solutions. In this role, you will work collaboratively with cross-functional teams to design, develop, and maintain high-quality software that meets the needs of our clients.

Join our innovative team at Box Inc. as a Senior Staff Architect in Workflow Engineering, where your expertise will lead the design and implementation of cutting-edge workflow solutions. You will collaborate with cross-functional teams to enhance our platform, ensuring scalability, performance, and optimal user experience. This role presents a unique opportunity to influence product direction and contribute to the overall success of our engineering initiatives.

Join our dynamic team at Lingarogroup as a Senior Fullstack Data Scientist. In this role, you will leverage your expertise in data science and software engineering to develop innovative data-driven solutions. You will work collaboratively with cross-functional teams to analyze complex datasets, build models, and implement algorithms that drive decision-making processes. Your contributions will be pivotal in shaping our data strategy and enhancing our product offerings.

The Portfolio Data Analyst role at Addepar centers on managing and analyzing portfolio data feeds. This position supports the delivery of data insights that help clients make investment decisions with confidence. Role overview Daily work involves handling portfolio data, monitoring its quality, and ensuring accuracy. Collaboration with cross-functional teams is a key part of the job, as teams work together to maintain high standards of data usability. What you will do Manage and analyze portfolio data feeds Support efforts to maintain and improve data quality Work with colleagues across different teams to ensure data meets client needs Location This position is based in Poland.

Addepar is looking for a Staff Software Engineer focused on Portfolio Services. This position centers on building and improving portfolio management solutions that support scalability, efficiency, and ease of use. Role overview This engineer will play a key part in designing and developing features for Addepar's portfolio management products. The work involves close collaboration with teams across engineering, product, and design to deliver new capabilities and refine existing ones. What you will do Develop and enhance software for portfolio management, with an emphasis on scalable and efficient solutions. Work with colleagues from different disciplines to deliver new features and improvements. Contribute technical expertise to help define and advance the technology stack. Location This role is based in Poland.

Join Turnitin as a Senior Fullstack/Backend Software Engineer, where your expertise in backend development, particularly with Java and serverless architectures, will be pivotal. We are seeking engineers who are enthusiastic about creating scalable distributed systems and delivering robust software solutions for our acclaimed educational platform.As an integral member of our shared services team, you'll spearhead the development and enhancement of the core systems supporting both our existing and upcoming applications.Key Responsibilities:Architect, develop, and optimize scalable backend services utilizing Java and serverless technologies (AWS Lambda).Design and implement RESTful APIs and event-driven architectures.Contribute to frontend component development as required.Enhance performance and cost-effectiveness of existing services.Collaborate with cross-functional teams, including Architects, Product Managers, and engineering leads, to deliver innovative solutions.Mentor junior developers and promote best practices.Establish and manage CI/CD pipelines.Maintain high-quality coding standards through peer reviews, automated testing, and compliance with development best practices.Document shared components comprehensively, providing usage guidelines and examples.

Join CaptivateIQ, a pioneering force in transforming sales performance management. We are revolutionizing the way companies plan, manage, and optimize their sales efforts, starting with innovative incentive compensation management and expanding into comprehensive sales planning solutions. Supported by industry leaders such as Sequoia, ICONIQ, Accel, and Sapphire Ventures, we empower dynamic companies like Netflix, Figma, and Stripe with the insights and flexibility they need to enhance revenue performance.As a member of our talented and rapidly growing team, you will tackle some of the most challenging and impactful problems in the realm of sales performance management.About the RoleAt CaptivateIQ, our engineering team is multicultural, collaborative, and fully distributed. We take pride in creating top-tier products driven by cutting-edge technologies. In this role, you will play a crucial part in maintaining the core platform utilized by compensation administrators to design and execute sales compensation models within CaptivateIQ.

Senior Software Engineer, Data Foundations ABOUT THE ROLE At Peloton, we view Data as a Product—a vital asset that drives every member interaction and influences business decisions. Our Datastores team is committed to offering a dependable, secure, and high-performing data persistence layer for application services throughout the organization. Our core principles include: 1. Safeguard the data, 2. Optimize for scalability, speed, and reliability, and 3. Minimize manual effort. We are seeking a Senior Software Engineer with extensive experience in constructing and managing data-intensive systems to join our Datastores team. This position is perfect for a backend engineer who has developed and maintained production systems heavily reliant on databases, caching layers, and data pipelines, and who is eager to advance their knowledge in scalable, cloud-native data infrastructures. You will collaborate at the intersection of application engineering and data platform reliability, working alongside service teams to enhance the storage, access, scalability, and observability of data across Peloton’s ecosystem. YOUR DAILY IMPACT AT PELOTON Your responsibilities will include: Designing, building, and maintaining backend systems that depend on scalable and highly available data persistence layers. Collaborating with service teams to refine database design, enhance query performance, and optimize data modeling. Contributing to automation efforts surrounding infrastructure provisioning using tools like Terraform and Backstage, while improving developer experience by creating self-service tools for databases and caching systems. Focusing on observability, performance insights, and autoscaling strategies for production datastores. Participating in architectural discussions regarding multi-regional data persistence and global scalability. This role merges hands-on backend engineering with significant exposure to cloud data systems and platform reliability challenges. WHAT YOU BRING We are looking for proficient backend engineers who are data-centric—those who have built systems where data performance, reliability, and modeling are crucial. 5+ years of software engineering experience in developing production backend systems. Strong familiarity with relational databases such as PostgreSQL or MySQL, including schema design, indexing, and query optimization. Experience with NoSQL datastores like DynamoDB, Redis, Elasticsearch, or Memcache. Exposure to data pipelines, event-driven architectures, and cloud technologies.

Addepar is seeking an Engineering Manager for the Portfolio Services division in Poland. This position leads a team of engineers focused on building solutions that strengthen portfolio management services for clients in the financial technology sector. Role overview The Engineering Manager oversees engineering processes and guides the team in delivering reliable, high-quality software. The work centers on improving efficiency and value within Addepar’s portfolio management offerings. What you will do Lead and mentor a team of engineers within Portfolio Services Oversee day-to-day engineering workflows and project execution Collaborate with cross-functional teams to meet product goals Ensure timely delivery of software that meets quality standards What we’re looking for Experience managing engineering teams Commitment to continuous improvement and fostering a culture of excellence Strong collaboration and communication skills

Netguru is a pioneering partner in the realm of digital commerce, dedicated to assisting renowned brands in the modernization of B2B solutions, marketplaces, and retail ecosystems. Since 2008, we have empowered businesses through innovative technology, AI-driven personalization, and exceptional engineering and design teams. As a certified B Corporation®, we have built a reputation as a trusted partner for major brands such as IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.Freelancing at Netguru: Your Flexible PathAt Netguru, our freelancers enjoy the liberty to choose their projects, working conditions, and schedules. We align you with opportunities that suit your expertise, allowing you to gain diverse experiences and develop new skills across various industries. Not only can you work on exciting projects, but you can also engage in full-time collaborations, becoming a valued member of our team.Are you ready to leave your mark? Join Netguru, and together we can create remarkable software.We are currently seeking a Senior Fullstack Engineer with proven experience in implementing Instagram Login independently.Compensation: up to 160 PLN/h (on a B2B contract)Engagement Level: Full-timeWorking Hours: CETStart Date: 31.01.2026Project Duration: 2 monthsKey Responsibilities:Overseeing the 'App Review' Process: Managing the complete verification cycle with Meta, including creating necessary screencasts and writing scope justifications to ensure app approval for Live access.Setting Up Meta Ecosystem: Correctly configuring the application environment in the Meta for Developers console, identified as a primary risk area by the client.OAuth Strategy & Implementation: Implementing the 'Login with Instagram' flow to securely retrieve specific influencer data points for profiling.Providing Technical Guidance: Serving as the subject-matter expert to navigate Meta's stringent policies and mitigate application rejection risks.Required Qualifications:Fluency in Polish and English.Experience with OAuth 2.0.Familiarity with Instagram Graph API.Experience with Meta App Review.Preferred Skills:Knowledge of Passport.js / NextAuth.js / OmniAuth (based on tech stack).Understanding of JWT (JSON Web Tokens).Experience with OpenID Connect (OIDC).Familiarity with Facebook Login Kit.Basic knowledge of GDPR compliance.Perks:What We Offer You:100% remote work flexibility.

Join the Innovative Team at SienaAt Siena, we are pioneering the first intelligence layer for customer experience. Our vision is to create an operating system of AI agents that seamlessly learn, remember, and act across all customer touchpoints—from support interactions to shopping experiences, including voice and social media.Siena goes beyond mere automation; we empower shopping agents, foster persistent customer memory, deliver actionable business insights, and cultivate empathetic interactions that resonate with users.We are redefining how businesses comprehend and engage with their customers, transforming every interaction into a learning opportunity for future enhancements.About Our TeamOur small, distributed team is committed to making a significant impact. Each member plays a vital role, as we emphasize efficiency and creativity in our work, making collaboration both swift and enjoyable.If you’re passionate about creating groundbreaking products, this is your chance. We are developing agents that do more than just respond to inquiries; they remember customers, learn from each engagement, and unify experiences across channels.Your RoleAs a Fullstack Software Engineer at Siena, you will manage projects from inception to completion, enhancing and optimizing features within our AI-driven customer support automation platform. Collaborating closely with the product team, you will help shape our development roadmap while constructing reliable, high-performance systems. Your contributions will facilitate millions of customer interactions with global brands, where your work's reliability and speed will directly influence business success. If you enjoy tackling real-world challenges, excel in dynamic environments, and take pride in delivering exceptional products, this role is perfect for you.Your ResponsibilitiesDesign, develop, and maintain scalable features across the entire tech stack (frontend, backend, and infrastructure).Collaborate with Product to break down project scopes into iterative, impactful releases.Integrate advanced LLM capabilities into real-world enterprise workflows.Work on an AI-first product, embedding cutting-edge LLM capabilities into customer support frameworks.Address complex engineering challenges, optimizing API performance and refining microservices architecture.Enhance and maintain our cloud infrastructure (AWS) with a DevOps mindset.Exhibit high levels of agency and ownership—taking initiative, making decisions, and propelling ideas to production.

Addepar is seeking a Portfolio Data Operations Analyst based in Poland. This position centers on managing and improving data operations to support the platform’s performance. Role overview The analyst will collaborate with cross-functional teams to maintain smooth data flow and ensure data accuracy. The focus is on supporting investment decision-making by delivering reliable data analytics. What you will do Oversee and optimize portfolio data operations Work with other teams to resolve data issues and maintain data quality Contribute to the accuracy and efficiency of the platform’s data processes What we look for Strong analytical skills and attention to detail Experience in data management or analytics Interest in using data to inform financial insights

Addepar is seeking a Lead Portfolio Data Analyst based in Poland. This position centers on interpreting and analyzing complex data sets to support strategic decision-making in the financial sector. Role overview The Lead Portfolio Data Analyst guides a team of analysts, ensuring high-quality analysis and actionable insights. The work directly informs investment strategies and supports improved outcomes for clients. Key responsibilities Analyze large and complex portfolio data sets Lead and mentor a team of data analysts Deliver insights that influence investment decisions Support efforts to enhance client results through data-driven recommendations Impact This role helps shape how data analysis advances within Addepar and across the financial industry. Expertise in this position contributes to better strategic choices and client experiences.