Senior Software Engineer - Python Development

Role overview SmartRecruiters is seeking a Senior Software Engineer with strong Python skills to join the team in Poland. This role focuses on building and enhancing scalable software that supports the company’s product suite. Senior engineers at SmartRecruiters play a key part in shaping technical decisions and work closely with colleagues from various team…

Asana is seeking an experienced Senior Infrastructure Engineer with robust software engineering expertise and a comprehensive grasp of production systems. This position is ideal for individuals who thrive on constructing systems that enhance infrastructure scalability, reliability, and operability through code rather than traditional runbooks.In this role, you will collaborate closely with a dynamic team to architect and develop internal platforms that fuel all of Asana's operations, encompassing product features, AI systems, and offline analytics. Our technology stack includes: AWS, Kubernetes (EKS), MySQL (RDS), OpenSearch, DynamoDB, Redis, Terraform, Datadog, TypeScript, Scala, Go, and Python.We particularly value candidates who think like backend engineers yet have a strong focus on system performance, failure modes, operational costs, and debugging.This position is located in our Warsaw office with a hybrid work schedule - in-office attendance is required on Mondays, Tuesdays, and Thursdays.We provide a Contract of Employment (UoP) for our employees in Poland.

We are seeking a highly skilled Senior Microsoft Platform/System Engineer to join our dynamic team at Altersolutions in Warsaw. In this role, you will leverage your deep expertise in Microsoft technologies to deliver innovative solutions that drive business success. Your contributions will be instrumental in enhancing our clients' systems and infrastructure.As a key member of our engineering team, you will collaborate with cross-functional teams to design, implement, and optimize Microsoft-based solutions. Your experience will help guide best practices and ensure the highest quality of service delivery.

Location: Poland About Us: RTB House is a leading global company that specializes in providing cutting-edge marketing technologies for renowned brands and agencies worldwide. Our unique ad-buying engine stands out as the world's first fully Deep Learning-powered platform, enabling advertisers to achieve exceptional results and meet their objectives throughout every stage of the marketing funnel. We are currently seeking talented engineers to join our Platform Engineering team within the Bidding Platform structure. If you have a passion for system-related topics such as deployment, monitoring, databases, and load balancing, along with experience in leading complex project specifications and coordinating team efforts, we want to hear from you! This is an excellent opportunity for those eager to tackle technically challenging and sophisticated solutions.

Join our dynamic team at evooq as a Senior Software Engineer! In this role, you will leverage your extensive experience in software development to design, implement, and maintain high-quality software solutions that meet our client’s needs. You will collaborate closely with cross-functional teams, contributing to all stages of the development lifecycle. If you are passionate about technology and eager to make a significant impact, we want to hear from you!

Oversee the technical management of SimCorp Dimension along with associated enterprise applications.Diagnose and resolve incidents within stipulated operational timelines.Conduct routine software updates and maintenance tasks.Ensure technical documentation is maintained and regularly updated.

Join Nordsec as a Senior Backend Engineer and be a part of our innovative team in Warsaw. We are seeking a talented engineer experienced in Golang to help us build robust backend systems that power our applications. You will work closely with cross-functional teams to design, implement, and optimize backend services that deliver exceptional user experiences.

As a Senior Software Engineer focusing on AI Retrieval at Asana, you will play a pivotal role in designing and implementing cutting-edge solutions that enhance our AI capabilities. You will collaborate with cross-functional teams to build scalable systems that improve information retrieval and user experience. Your expertise in software engineering and artificial intelligence will help drive innovation and set new standards for efficiency and performance.

Join Fresha, a leading platform in the beauty and wellness industry, as a Senior IT Operations Engineer. In this pivotal role, you will oversee and enhance our IT operational processes, ensuring optimal performance and reliability for our B2B services. Collaborating with cross-functional teams, you will implement innovative solutions that drive efficiency and improve service delivery.

Join Saily, where we simplify staying connected while traveling — no roaming fees, no plastic SIM cards, just high-speed, secure mobile data accessible in over 200 destinations. With millions of satisfied customers and countless travelers using Saily at any time, we are dedicated to enhancing their experience.At Saily, we cultivate an AI-driven Product Engineering culture that empowers our engineers to:Own the product development lifecycle from concept to deployment.Leverage AI Agents to automate repetitive coding tasks, maximizing their productivity.Continuously identify and implement improvements within our processes.Embrace curiosity and encourage knowledge sharing.Focus on delivering a seamless, connected experience for our customers.We prioritize growth, contribution, and impactful work over comfort and hierarchy. At Saily, we provide our talented team members with the autonomy and resources they need to excel.Key ResponsibilitiesEnhance our product by developing and maintaining innovative features.Create functionalities that support multi-dimensional personalization, A/B testing, and data analytics.Maintain a robust and high-quality codebase.Continuously seek opportunities to improve code quality and system performance.Provide mentorship on development best practices and offer technical guidance to peers.Contribute to the overall vision and long-term goals of the team.Conduct research and development as needed.Collaborate within a cross-functional team to ensure clear communication among all members.Work alongside engineering, product, and design experts from other teams.Note: This position requires in-office attendance three times a week.

Join the Vanguard of VPN Technology!At NordVPN, we are at the forefront of providing cutting-edge virtual private network solutions, offering more than just security. If you're a proactive innovator who enjoys tackling complex problems, we invite you to be part of our team developing Threat Protection Pro, the NordLynx protocol, and the fastest VPN globally—empowering users with enhanced privacy, security, and control.Your Contribution: Enable millions of users to reclaim their online security, privacy, and data.As a Senior Site Reliability Engineer, you will ensure content accessibility across our worldwide edge network. Your primary responsibility will be to guarantee that traffic reaches our users swiftly, reliably, and securely, no matter where they are located.You will navigate the realms of networking, load balancing, and traffic shaping. When issues arise—be it slowness, inaccessibility, or erratic behavior at the protocol layer—you will be the one to diagnose and resolve them.Key Responsibilities:Ensure seamless content accessibility across a globally distributed edge infrastructure.Design, operate, and enhance load balancing and traffic shaping systems at scale.Troubleshoot connection, latency, and accessibility issues end-to-end.Manage HTTP traffic flow from client to edge to origin and back.Investigate and rectify website and service reachability problems.Work across protocol layers to diagnose issues in depth.Core Qualifications:Proficient in load balancing and traffic shaping techniques—architecture, algorithms, health checks, and failover mechanisms.Experience with NGINX and/or HAProxy—configuration, tuning, and debugging in high-traffic environments.Solid understanding of networking fundamentals, including DNS, routing, firewalls, and packet analysis.Fluency in the OSI model—comfortable working across layers 3 to 7, with knowledge of TCP internals, SSL/TLS handshake, and termination.Experience with SaltStack.Linux administration skills.Proficiency in Python for automation, tooling, and scripting.Ability to troubleshoot network and application layer issues in large-scale production environments.

Fraud Warning: Beware of potential scams posing as legitimate job opportunities. To ensure your application is considered, please apply only through the official Sensor Tower website or directly through our authorized profiles on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account information during the application process. All official communications will originate from email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and no conversations will shift to external email or text platforms. If you encounter any issues, please reach out to us. Remember to attach your resume when applying.Recruitment Agencies: Sensor Tower does not accept unsolicited resumes from third-party agencies. Please refrain from sending resumes to our job alias, employees, or any other location. Sensor Tower will not cover fees related to unsolicited resumes and will not compensate agencies without a signed agreement.About This Role:Are you excited by the dynamic environment of a startup?Do you have a passion for developing high-impact, rapidly deployed products?Are you committed to mentoring emerging engineers and championing technical excellence?Join us in revolutionizing how insights are derived in digital marketing!Apply today!Role Summary:As a Mid / Senior Frontend Engineer at Sensor Tower, you will play a crucial role in developing top-notch products and features that enhance our user experience. Our flat organizational structure allows for your input to significantly influence product design and development.

Are you tired of the mundane task of reporting? Join Asana and help us revolutionize one of the most disliked managerial responsibilities. While reporting is often viewed as a tedious chore, it is essential for effective decision-making. When approached correctly, reporting evolves from a simple status update into a vital strategic tool. At Asana, the Reporting Connections team is dedicated to transforming reporting into an engaging and impactful experience, empowering leaders with the clarity and confidence they need to steer their organizations toward success. Our mission is to create a seamless connection between the work being done and the decisions that need to be made. Executives and senior leaders require more than just dashboards; they need straightforward access to crucial information. They seek clear, concise updates straight to their inboxes, Slack, or during morning meetings, without the hassle of opening additional tabs. We are developing systems that provide real-time insights across diverse tools, teams, and templates. We are reimagining reporting, and we need your expertise. If you've ever been frustrated by status updates, this role could be the perfect fit for you. This position is based in our Warsaw office with a hybrid work schedule. Standard in-office days are Monday, Tuesday, and Thursday, while Wednesdays offer the option to work from home. Working from home on Fridays is contingent on your specific role, and your recruiter will provide more information regarding in-office requirements. All employees in Poland are employed under a contract of employment.

AECOM is looking for a skilled Senior Engineer specializing in Transmission and Distribution (Primary). In this pivotal role, you will spearhead the design engineering for High Voltage Substation projects, ensuring that engineering deliverables related to primary circuits are produced on time and to the highest quality standards.Your focus will be on executing project design packages with technical precision while guiding and coordinating CAD designers and drafters in the development of comprehensive drawings and models. The position demands extensive hands-on experience in primary engineering for substations, coupled with effective project delivery in the transmission and distribution sectors.Key ResponsibilitiesDeliver comprehensive primary circuit engineering packages for HV Substation projects, aligning with project scope, timelines, and quality standards.Create and generate primary substation design deliverables, including Single Line Diagrams (SLD), substation layouts and equipment arrangements, busbar and conductor designs, electrical clearances and safety protocols, and earthing and lightning protection calculations.Ensure adherence to project specifications, client standards, and international guidelines (IEC / IEEE / AS).Prepare and uphold high-quality engineering documentation and design reports.

At Samba TV, we are at the forefront of transforming the global viewing experience through cutting-edge technology and proprietary data. Our mission is to enhance how audiences connect with their favorite shows and movies while providing advertisers with the tools to effectively engage and measure viewer reach across all devices. With a unique cultural perspective influenced by our extensive global data and AI insights, we are excited to drive innovation in the media landscape.We are seeking a passionate and experienced Senior Engineering Manager to lead our Data Delivery team. This role encompasses overseeing both a frontend platform team and a data delivery team, both of which are currently engaged in significant phases of platform evolution that promise high-impact results.In this position, reporting to the Senior Director of Engineering, you will serve as a second-line manager, guiding Engineering Managers and senior contributors across both teams. You should bring over a decade of engineering experience, along with the capability to establish operational objectives and policies for your department. You will be responsible for driving strategic initiatives across multiple workstreams, ensuring outcomes that have a meaningful impact on the broader business landscape.

AECOM Enterprise Capabilities is in search of a Senior Engineer specializing in Transmission & Distribution (Secondary). This pivotal role involves overseeing the design and implementation of secondary engineering systems for High Voltage Substations, which encompasses protection, control, automation, and communication systems. The focus is on delivering superior engineering outputs throughout all phases of projects including Front End Engineering Design (FEED), Detailed Design, Construction, and Commissioning support, while ensuring adherence to technical standards, constructability, and reliable substation operations.Generate and present secondary design documentation for High Voltage Substations.Formulate protection and control philosophies, contributing to Basis of Design documentation.Execute engineering designs for AC/DC auxiliary systems, control circuits, interlocking, and automation interfaces.Assist in relay configuration and protection scheme design (distance, differential, overcurrent, busbar, transformer protection, etc.).Ensure designs are feasible, constructible, and consistent with project scope, timeline, and budget.Collaborate closely with the Project Engineer and/or Project Manager to facilitate engineering planning, monitor deliverables, and ensure technical coordination.Work in conjunction with primary, civil, and SCADA/telecom disciplines to guarantee an integrated and clash-free design.Provide limited technical support to junior engineers when required, without formal mentorship obligations.

Join our innovative team as a Senior Data Engineer and play a pivotal role in enhancing our product platform. We are looking for an experienced professional with a strong background in data engineering to design, implement, and maintain robust data solutions.Main Responsibilities:Architect and develop data solutions that elevate our product platform.Define and refine data models tailored for analytical, operational, and predictive applications.Engage in critical data architecture and technical infrastructure decisions.Guarantee high quality, reliability, and maintainability through best practices in CI/CD and automation.Work closely with product owners, developers, and stakeholders to convert business requirements into effective technical solutions.Technologies Utilized: Azure DevOps, Kubernetes, SQL, ETL.

Are you passionate about leading a team while writing high-quality code? Join Sigma Software as a Senior Software Engineer / Team Leader! In this pivotal role, you will guide a talented team of engineers, overseeing code reviews, design critiques, and career development while collaborating with our integration teams.Design and develop scalable solutions, ensuring a balance between production-ready code and rapid proof-of-concept development.Take ownership of sprint planning and execute the quarterly roadmap effectively.Serve as the final escalation point for complex technical challenges.Quickly learn and adopt new technologies while strategically managing technical debt.

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.

Saily, part of nordsec, helps travelers connect worldwide without roaming fees or plastic SIM cards. The service delivers fast, secure mobile data in more than 200 locations and supports millions of paying users, including hundreds of thousands of travelers at any given time. The team values an AI-native product engineering approach. Engineers at Saily take responsibility for the full product lifecycle, from early ideas through deployment. AI agents handle repetitive work, freeing engineers to focus on solving customer problems and building new features. How the team works Engineers design and deliver solutions to real customer challenges, owning projects from start to finish. AI tools automate routine tasks, letting the team work more effectively. Everyone can suggest and implement improvements to the platform. Continuous learning, curiosity, and sharing knowledge are core values. The main goal is to provide travelers with a smooth, reliable connection wherever they go. Culture and values Growth is valued over comfort. Contribution matters more than hierarchy. Impact takes priority over rigid processes. Team members receive the context, autonomy, and AI tools needed to excel.