Backend Engineer

🏢 Summary: Senior Backend Engineer role focused on building and scaling backend systems for an AI-driven product that transforms complex government data into actionable insights. The position involves designing data ingestion, processing pipelines, and distributed infrastructure from scratch, with full ownership from architecture to production. You will work closely with a small senior team to deliver scalable, production-ready systems. 🗂️ Requirements: 6+ years of Backend Engineering experience, Experience in JVM ecosystem, Experience in product companies (B2B SaaS preferred), Experience designing and owning backend systems in production, Strong knowledge of system design and scalability, Experience building asynchronous or distributed systems, Ability to make and justify technical decisions, Fluency in English, Valid work authorization in Europe or LATAM 📃 Skills: Kotlin, Java, JVM, SQL, GCP, Messaging, Queues, DistributedSystems, SystemDesign, DataPipelines, LLMs, AI 🏢 Description: About the role We’re looking for a Senior Backend Engineer to join our early team and help build our product from zero to one. You’ll work on a product that helps companies navigate complex government data, from contracts and grants to market signals and turn it into actionable insights using AI. On the backend side, this means working on data ingestion, processing, and the infrastructure that powers search and AI-driven workflows at scale. You’ll collaborate closely with a small, senior team and have real ownership, from shaping solutions to shipping them to production and improving them over time. You might be a fit if you: Must have: 6+ years of experience as a Backend Engineer, preferably in the JVM ecosystem (we use Kotlin on the backend) Experience working in product companies (B2B SaaS preferred) with direct impact on shipped features Experience working in small companies or startups would be a strong advantage Experience designing and owning backend systems in production (from initial design to deployment and ongoing improvements) Strong understanding of system design, including scalability, failure handling, and trade-offs Experience building asynchronous or distributed systems (e.g. messaging, queues, event-driven systems) Ability to make and justify technical decisions, not just implement given solutions Fluency in written and spoken English Nice to have: Experience with large-scale data processing, scraping, or data pipelines Experience working with LLMs / AI-related systems Experience with GCP or similar cloud environments How We Work Build Bridges to Help Customers Win - We pride ourselves on being obsessively customer-centric. Shooting Star Speed - We move with extreme speed. We value momentum, decisiveness, and the ability to accelerate when it matters. Fun Is a Feature - Fun is a Feature means we intentionally design Starbridge to be an energizing place to do hard work. Joy, humor, and camaraderie make great teams faster, sharper, and more resilient. In the Arena - We believe the best ideas come from living close to the work, feeling the friction, hearing the nuance, and experiencing the details firsthand. Benefits include: Competitive salary + early-stage equity Unlimited PTO Regular off-sites (NYC + global locations) Interview Process We move fast — really fast. Getting back to someone today beats tomorrow, and our interview process reflects that mindset. Please keep us posted on your timeline so we can move quickly and speed things up where needed. After submitting your application, the team reviews your CV and statement of exceptional work. If your application passes this stage, you will be invited to a 30-minute interview during which a member of our team will make sure you're a good fit for the role. You will have the opportunity ask questions and learn more about the role as well. We'll then send you a programming challenge that consists of two parts: LeetCode and SQL. Beyond that step, you will enter the main process, which consists of three interviews: System design exercise hands-on. Live coding in Java/Kotlin. Product thinking and past work. All interviews will be conducted via Google Meet. Eligibility to Work in Europe or LATAM: Candidates must hold valid authorization to work in the country where they will be based. At this time, we are unable to offer visa sponsorship or assist with work permit applications.

🏢 Summary: Backend or Full-Stack Software Engineer role in an Agile, client-facing team focused on building and maintaining scalable backend services and REST APIs with Node.js, while contributing to React-based frontend features. The position involves developing database integrations, ensuring code quality, and collaborating in Agile ceremonies. It combines strong backend development with optional frontend and cloud exposure. 🗂️ Requirements: 3–6 years of software development experience, Strong backend experience with Node.js, Proficiency in JavaScript and TypeScript, Experience with Hapi.js or Nest.js, Experience with PostgreSQL, Experience with Knex or TypeORM, Experience building REST APIs, Experience working in Agile teams 📃 Skills: Node.js, JavaScript, TypeScript, Hapi.js, Nest.js, PostgreSQL, Knex, TypeORM, REST, React, Redux, Redux-Saga, Recharts, D3.js, AWS, S3, SNS, SQS, Socket.io, Kubernetes 🏢 Description: At Capgemini Engineering, the world leader in engineering services, we bring together a global team of engineers, scientists, and architects to help the world’s most innovative companies unleash their potential. From autonomous cars to life-saving robots, our digital and software technology experts think outside the box as they provide unique R&D and engineering services across all industries. Join us for a career full of opportunities. Where you can make a difference. Where no two days are the same. Your role In this role, you will join a client-facing Agile delivery team as a Backend or Full-Stack Software Engineer, developing and maintaining scalable backend services and REST APIs using Node.js, while contributing to frontend features in React where needed. Your tasks As a part of the team, develop and maintain backend services using Node.js Build and integrate REST APIs and database layers Develop frontend features using React Collaborate with cross‑functional teams in Agile ceremonies Ensure code quality, performance, and maintainability Your profile 3–6 years of software development experience, with strong backend skills in Node.js, JavaScript/TypeScript, Hapi.js or Nest.js, PostgreSQL, and Knex/TypeORM Experience working in Agile teams, with a strong sense of ownership and good communication skills Familiarity with cloud and platform tools such as AWS (S3, SNS, SQS), Socket.io , and Kubernetes is a plus Frontend experience with React, Redux/Redux-Saga, and data visualisation libraries like Recharts or D3.js is an advantage, as is a proactive interest in AI tooling (e.g. Cursor) What You'll love about working here: Access to over 70 training tracks with certification opportunities (e.g., GenAI, Architects, Google) on our NEXT platform. Dive into a world of knowledge with free access to Education First languages platform, TED Talks and Udemy Business materials and trainings. Community Hub that will allow you to choose from over 20 professional communities that gather people interested in, among others: Salesforce, Java, Could, IoT, Agile, AI. Practical benefits : private medical care with Medicover with additional packages (e.g., dental, senior care, oncology) available on preferential terms, life insurance and 40+ options on our NAIS benefit platform, including Netflix, Spotify or Sports card. Well-being culture: medical care with Medicover, private life insurance, and sposrts card. But we went one step further by creating our own Capgemini Helpline offering therapeutical support if needed and the educational podcast "Let's talk about wellbeing" which you can listen to on Spotify. Get to know us Capgemini is committed to diversity and inclusion, ensuring fairness in all employment practices. We evaluate individuals based on qualifications and performance, not personal characteristics, striving to create a workplace where everyone can succeed and feel valued. Do you want to get to know us better? Check our Instagram — @capgeminipl or visit our Facebook profile — Capgemini Polska . You can also find us on YouTube . About Capgemini Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organizations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of over 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2025 global revenues of €22.5 billion.

🏢 Summary: Opportunity for Mid and Senior Software Engineers to design and build high-performance, scalable backend systems powering global content delivery. The role focuses on event-driven, distributed architectures, technical leadership, and ownership of reliability and scalability for systems used by millions of users. It combines hands-on development with architectural decision-making in a cloud-native environment. 🗂️ Requirements: 4+ years (Mid) or 6+ years (Senior) experience in building scalable backend systems, Proficiency in Kotlin, Python or similar backend language, Experience with modern backend frameworks such as Spring Boot, Experience with relational databases (PostgreSQL or MySQL), Experience with NoSQL databases (DynamoDB or MongoDB), Hands-on experience with microservices architecture, Experience with event-driven systems, Experience with Kafka or similar streaming platform, Experience in API design (REST, gRPC or GraphQL), Hands-on experience with AWS services, Experience with Docker and Kubernetes, Experience with CI/CD pipelines and DevOps practices, Experience with monitoring and observability tools, Production support and incident management experience in distributed systems 📃 Skills: Kotlin, Python, Java, Go, TypeScript, JavaScript, Spring, REST, gRPC, GraphQL, Kafka, Redis, PostgreSQL, MySQL, DynamoDB, MongoDB, AWS, Docker, Kubernetes, Terraform, GitHub, Jenkins, Datadog, Sentry 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Senior and Mid Software Engineers to join the Content Cloud team . In this role, you will design and build high-performance backend systems that power content delivery across a global platform. You will act as a technical leader within the team, driving architectural decisions, mentoring engineers, and ensuring the reliability and scalability of systems used by millions of users. This is a hands-on role with strong ownership and impact on distributed, event-driven systems at scale. Key takeaways: Stack : Kotlin (main codebase) We're open to: Java/Go/TypeScript/JavaScript, Other tools: REST/gRPC/GraphQL, Kafka, Redis, PostgreSQL/MySQL, DynamoDB/MongoDB, AWS, Docker, Kubernetes Salary : Mid : 21 000 PLN - 23 000 PLN gross on the Contract of Employment Senior: 23 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location : ul. Grzybowska 60, Warsaw Recruitment process : A call with MOTIFE Recruiter Coding interview Panel interviews with the team (coding, architecture, and cross-collaboration interviews, Hiring Manager meeting) Responsibilities: Backend Architecture & Scalability Design and build high-performance, scalable backend services and APIs supporting global content delivery Architect event-driven systems and microservices handling large-scale traffic and real-time interactions Drive system design decisions with a focus on reliability, performance, and security Technical Leadership Lead technical discussions, architecture reviews, and design decisions across teams Define and promote reusable patterns, components, and engineering standards Mentor engineers through code reviews, pair programming, and technical guidance Performance & Reliability Identify system bottlenecks using monitoring, tracing, and load testing tools Optimize performance through data modeling, caching strategies, and query improvements Engineering Excellence Champion best practices including CI/CD, automated testing, observability, and infrastructure as code Maintain high standards for code quality, scalability, and maintainability Continuously improve development processes and system architecture Cross-Functional Collaboration Partner closely with Product, Design, and QA to deliver impactful features Translate business requirements into scalable technical solutions Act as a domain expert within the team and contribute to platform-wide initiatives Requirements: Technical Expertise 6+ years of experience building high-performance, scalable backend systems as Senior/4+ years of experience as a Mid Engineer Strong proficiency in Kotlin, Python, or similar backend languages Experience with modern backend frameworks (e.g., Spring Boot or Python-based frameworks) Strong experience with both relational (PostgreSQL, MySQL) and NoSQL databases (DynamoDB, MongoDB) Hands-on experience with microservices and event-driven architectures Experience with distributed streaming platforms such as Kafka Solid understanding of API design (REST, gRPC, or GraphQL) Cloud & Infrastructure Hands-on experience with AWS services (e.g., S3, DynamoDB, Lambda, SQS, IAM) Experience with Docker and Kubernetes Familiarity with infrastructure and deployment tooling (e.g., Terraform, GitHub Actions, Jenkins) Experience with caching systems such as Redis or Memcached Engineering Practices Strong understanding of CI/CD, DevOps, and Agile methodologies Experience with observability and monitoring tools (e.g., Datadog, Sentry) Proven experience in production support and incident management in distributed systems What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro Apply now If this sounds like your next step, we’d love to hear from you! Please apply via our careers page and submit your CV in English.

🏢 Summary: Mid and Senior Software Engineers are sought to design and build high-performance backend systems powering global content delivery on a large-scale fitness platform. The role focuses on event-driven microservices, architectural leadership, and ensuring reliability, scalability, and performance for systems used by millions of users. This is a hands-on position with strong ownership in distributed systems operating at scale. 🗂️ Requirements: 4+ years backend experience (Mid) or 6+ years (Senior), Proficiency in Kotlin or Python, Experience with Spring Boot or Python frameworks, Experience with PostgreSQL or MySQL, Experience with DynamoDB or MongoDB, Experience with microservices architecture, Experience with event-driven systems, Experience with Kafka, Knowledge of REST, gRPC, or GraphQL APIs, Experience with AWS services, Experience with Docker and Kubernetes, Experience with CI/CD pipelines, Experience with Redis or Memcached, Experience with monitoring and observability tools, Production support and incident management experience 📃 Skills: Kotlin, Python, Java, Go, TypeScript, JavaScript, Spring, REST, gRPC, GraphQL, Kafka, Redis, PostgreSQL, MySQL, DynamoDB, MongoDB, AWS, S3, Lambda, SQS, IAM, Docker, Kubernetes, Terraform, GitHubActions, Jenkins, Datadog, Sentry 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Senior and Mid Software Engineers to join the Content Cloud team . In this role, you will design and build high-performance backend systems that power content delivery across a global platform. You will act as a technical leader within the team, driving architectural decisions, mentoring engineers, and ensuring the reliability and scalability of systems used by millions of users. This is a hands-on role with strong ownership and impact on distributed, event-driven systems at scale. Key takeaways: Stack : Kotlin (main codebase) We're open to: Java/Go/TypeScript/JavaScript, Other tools: REST/gRPC/GraphQL, Kafka, Redis, PostgreSQL/MySQL, DynamoDB/MongoDB, AWS, Docker, Kubernetes Salary : Mid : 21 000 PLN - 23 000 PLN gross on the Contract of Employment Senior: 23 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location : ul. Grzybowska 60, Warsaw Recruitment process : A call with MOTIFE Recruiter Coding interview Panel interviews with the team (coding, architecture, and cross-collaboration interviews, Hiring Manager meeting) Responsibilities: Backend Architecture & Scalability Design and build high-performance, scalable backend services and APIs supporting global content delivery Architect event-driven systems and microservices handling large-scale traffic and real-time interactions Drive system design decisions with a focus on reliability, performance, and security Technical Leadership Lead technical discussions, architecture reviews, and design decisions across teams Define and promote reusable patterns, components, and engineering standards Mentor engineers through code reviews, pair programming, and technical guidance Performance & Reliability Identify system bottlenecks using monitoring, tracing, and load testing tools Optimize performance through data modeling, caching strategies, and query improvements Engineering Excellence Champion best practices including CI/CD, automated testing, observability, and infrastructure as code Maintain high standards for code quality, scalability, and maintainability Continuously improve development processes and system architecture Cross-Functional Collaboration Partner closely with Product, Design, and QA to deliver impactful features Translate business requirements into scalable technical solutions Act as a domain expert within the team and contribute to platform-wide initiatives Requirements: Technical Expertise 6+ years of experience building high-performance, scalable backend systems as Senior/4+ years of experience as a Mid Engineer Strong proficiency in Kotlin, Python, or similar backend languages Experience with modern backend frameworks (e.g., Spring Boot or Python-based frameworks) Strong experience with both relational (PostgreSQL, MySQL) and NoSQL databases (DynamoDB, MongoDB) Hands-on experience with microservices and event-driven architectures Experience with distributed streaming platforms such as Kafka Solid understanding of API design (REST, gRPC, or GraphQL) Cloud & Infrastructure Hands-on experience with AWS services (e.g., S3, DynamoDB, Lambda, SQS, IAM) Experience with Docker and Kubernetes Familiarity with infrastructure and deployment tooling (e.g., Terraform, GitHub Actions, Jenkins) Experience with caching systems such as Redis or Memcached Engineering Practices Strong understanding of CI/CD, DevOps, and Agile methodologies Experience with observability and monitoring tools (e.g., Datadog, Sentry) Proven experience in production support and incident management in distributed systems What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro Apply now If this sounds like your next step, we’d love to hear from you! Please apply via our careers page and submit your CV in English.

🏢 Summary: Senior and Mid Software Engineers to design and build high-performance, scalable backend systems powering global content delivery on a distributed, event-driven platform. The role combines hands-on development with architectural ownership, focusing on reliability, scalability, and performance at scale. Engineers contribute to microservices architecture, streaming systems, and cloud-native infrastructure in a hybrid work model. 🗂️ Requirements: 6+ years (Senior) or 4+ years (Mid) experience in scalable backend development, Proficiency in Kotlin, Python or similar backend language, Experience with Spring Boot or Python-based frameworks, Experience with relational databases (PostgreSQL or MySQL), Experience with NoSQL databases (DynamoDB or MongoDB), Hands-on experience with microservices architecture, Experience with event-driven systems, Experience with Kafka or other streaming platforms, Strong knowledge of REST, gRPC or GraphQL APIs, Experience with AWS services, Experience with Docker and Kubernetes, Experience with CI/CD pipelines, Experience with caching systems (Redis or Memcached), Experience with observability and monitoring tools, Production support experience in distributed systems 📃 Skills: Kotlin, Python, Java, Go, TypeScript, JavaScript, SpringBoot, PostgreSQL, MySQL, DynamoDB, MongoDB, Kafka, REST, gRPC, GraphQL, AWS, S3, Lambda, SQS, IAM, Docker, Kubernetes, Terraform, GitHubActions, Jenkins, Redis, Memcached, Datadog, Sentry, CI/CD 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Senior and Mid Software Engineers to join the Content Cloud team . In this role, you will design and build high-performance backend systems that power content delivery across a global platform. You will act as a technical leader within the team, driving architectural decisions, mentoring engineers, and ensuring the reliability and scalability of systems used by millions of users. This is a hands-on role with strong ownership and impact on distributed, event-driven systems at scale. Key takeaways: Stack : Kotlin (main codebase) We're open to: Java/Go/TypeScript/JavaScript, Other tools: REST/gRPC/GraphQL, Kafka, Redis, PostgreSQL/MySQL, DynamoDB/MongoDB, AWS, Docker, Kubernetes Salary : Mid : 21 000 PLN - 23 000 PLN gross on the Contract of Employment Senior: 23 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location : ul. Grzybowska 60, Warsaw Recruitment process : A call with MOTIFE Recruiter Coding interview Panel interviews with the team (coding, architecture, and cross-collaboration interviews, Hiring Manager meeting) Responsibilities: Backend Architecture & Scalability Design and build high-performance, scalable backend services and APIs supporting global content delivery Architect event-driven systems and microservices handling large-scale traffic and real-time interactions Drive system design decisions with a focus on reliability, performance, and security Technical Leadership Lead technical discussions, architecture reviews, and design decisions across teams Define and promote reusable patterns, components, and engineering standards Mentor engineers through code reviews, pair programming, and technical guidance Performance & Reliability Identify system bottlenecks using monitoring, tracing, and load testing tools Optimize performance through data modeling, caching strategies, and query improvements Engineering Excellence Champion best practices including CI/CD, automated testing, observability, and infrastructure as code Maintain high standards for code quality, scalability, and maintainability Continuously improve development processes and system architecture Cross-Functional Collaboration Partner closely with Product, Design, and QA to deliver impactful features Translate business requirements into scalable technical solutions Act as a domain expert within the team and contribute to platform-wide initiatives Requirements: Technical Expertise 6+ years of experience building high-performance, scalable backend systems as Senior/4+ years of experience as a Mid Engineer Strong proficiency in Kotlin, Python, or similar backend languages Experience with modern backend frameworks (e.g., Spring Boot or Python-based frameworks) Strong experience with both relational (PostgreSQL, MySQL) and NoSQL databases (DynamoDB, MongoDB) Hands-on experience with microservices and event-driven architectures Experience with distributed streaming platforms such as Kafka Solid understanding of API design (REST, gRPC, or GraphQL) Cloud & Infrastructure Hands-on experience with AWS services (e.g., S3, DynamoDB, Lambda, SQS, IAM) Experience with Docker and Kubernetes Familiarity with infrastructure and deployment tooling (e.g., Terraform, GitHub Actions, Jenkins) Experience with caching systems such as Redis or Memcached Engineering Practices Strong understanding of CI/CD, DevOps, and Agile methodologies Experience with observability and monitoring tools (e.g., Datadog, Sentry) Proven experience in production support and incident management in distributed systems What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro Apply now If this sounds like your next step, we’d love to hear from you! Please apply via our careers page and submit your CV in English.

🏢 Summary: Senior Backend Engineer role focused on building and scaling a cloud-based SaaS platform using modern .NET services and REST APIs. The position involves designing distributed systems, improving reliability and observability, and working with cloud and container environments. You will contribute to technical decisions and engineering best practices within a collaborative team. 🗂️ Requirements: 5+ years backend development experience, Experience with SaaS and web applications, Strong knowledge of C#, Strong knowledge of modern .NET/.NET Core, Solid computer science fundamentals, Experience with distributed systems design, Experience with cloud platforms, Experience with containers and orchestration, Understanding of concurrency and performance, Knowledge of authentication and authorization mechanisms 📃 Skills: C#, .NET, .NETCore, REST, Azure, AWS, GCP, Kubernetes, Kafka, RabbitMQ, SQS, Docker, SQL, HTML, CSS, JavaScript 🏢 Description: We’re hiring a Senior Backend Engineer to help build and scale a cloud-based SaaS platform. You’ll work on modern .NET services and APIs, improve reliability and observability, and contribute to technical decisions as part of a collaborative engineering team. Responsibilities: Build and maintain backend services and REST APIs in C# / .NET (.NET Core). Design scalable solutions for distributed systems (async workflows, messaging, integrations). Work with cloud services (Azure/AWS/GCP) and container environments (e.g. Kubernetes). Strengthen system reliability with logging, metrics, tracing, and monitoring. Support secure access patterns: authentication/authorization, API gateway concepts. Contribute through code reviews, good engineering practices, and automation. Requirements: 5+ years of backend development experience, including SaaS and web applications. Strong knowledge of C# and modern .NET + solid CS fundamentals. Familiarity with containers/orchestration and cloud-native approaches. Experience with some of: Kafka/RabbitMQ/SQS, workflow orchestration, job scheduling, search. Good understanding of concurrency and performance. Strong communication skills; Agile/Scrum is a plus. Bonus: basic front-end knowledge (HTML/CSS/JS).

🏢 Summary: Backend Engineer role focused on building and optimizing high‑performance, large‑scale data processing systems within an AI‑driven behavioral data platform. The position involves designing architectures for high‑volume data, developing distributed services, and ensuring scalability and performance in cloud environments. You will work with modern JVM technologies, streaming platforms, and observability tools in a production‑grade system used by enterprise clients. 🗂️ Requirements: Proficiency in Scala or other JVM language, Willingness to program in Rust, Solid understanding of Kafka, Solid understanding of Kubernetes, Experience with Akka or ZIO or Cats, Experience with SQL databases, Experience with NoSQL databases, Hands-on use of AI coding tools in daily development, Ability to design and scale high-volume distributed systems, Strong debugging and troubleshooting skills 📃 Skills: Scala, JVM, Rust, Kafka, Kubernetes, Akka, ZIO, Cats, SQL, NoSQL, Azure, GCP, ElasticSearch, Clickhouse, OpenTelemetry, Jaeger, GitHubCopilot, Claude, Cursor 🏢 Description: We successfully deliver an all-in-one tool - Synerise (YouTube link) . An ever-evolving behavioral data platform, enhanced by AI to generate outstanding ROI in more than 30 markets for industry leaders in Retail, Banking, eCommerce, Automotive, Insurance, and Telco, processing more than 150 billion transactions annually. However, we don't limit ourselves solely to this solution. We're building BaseModel (website link) - a foundation model for behavioral data embedded within a novel platform for enterprise Data Science teams, that is another step on our path to create innovation in AI and demonstrate its potential for the business world. ‍ Having such great solutions, we are looking for a highly motivated Backend Engineer to join our brave and brilliant Synerise Team. See if you fit our diverse and dynamic environment, where we constantly evolve together with the growth of our clients. About the team Our Backend Team works primarily with Scala , Apache Kafka , ElasticSearch , Clickhouse , Kubernetes , and cloud environments ( Azure and GCP ). Observability is a first-class concern: distributed tracing (OpenTelemetry, Jaeger), structured logging, and rich metrics are embedded into how we design and operate services. What will you do on a daily basis? Develop architecture and design patterns to process and store high volume data sets. Develop software with a core focus around optimisation and performance. Translate complex functional and technical requirements into detailed design. Perform analysis of vast data stores and uncover insights. What will make us a perfect match? Programming skills in Scala or other JVM language. Programming skills in Rust or willingness to learn. Solid understanding of Kafka and Kubernetes. Experience with (at least one): Akka / ZIO / Cats. Experience with SQL and NoSQL databases. Hands-on experience using AI coding (e.g., Claude Code, Cursor, GitHub Copilot) as part of daily software engineering work. Capacity to plan and scale systems to keep up with incredible growth. Excellent troubleshooting and debugging skills. A passion for building tools and automating everything. Strong analytical skills. What will convince us even more? Solid understanding of JVM internals (GC, profiling, heap and thread dumps). Experience designing and operating microservices architectures . Hands-on experience working in cloud environments ( Azure and/or GCP ), preferably with AKS. Working knowledge of Java or Python. Knowledge of ElasticSearch/Opensearch. Basic knowledge of AI/ML concepts. What can we provide for you? Work on a production-grade, large-scale system used by enterprise customers worldwide. Real technical challenges around performance, data volume, and distributed systems. Opportunities for continuous technical growth and deeper ownership over system design. Support from experienced engineers and a strong engineering culture. Influence on architectural and technical decisions within your team.

🏢 Summary: Backend Engineer role focused on building and optimizing large-scale, high-performance data processing systems within an AI-driven behavioral data platform. The position involves designing distributed architectures, processing massive datasets, and ensuring scalability and reliability in cloud environments. You will work with modern JVM and cloud-native technologies to deliver production-grade solutions for enterprise customers. 🗂️ Requirements: Proficiency in Scala or other JVM language, Experience with Rust or willingness to learn, Strong knowledge of Kafka, Strong knowledge of Kubernetes, Experience with Akka or ZIO or Cats, Experience with SQL databases, Experience with NoSQL databases, Hands-on use of AI coding tools, Ability to design and scale distributed systems, Strong troubleshooting and debugging skills 📃 Skills: Scala, JVM, Rust, Kafka, Kubernetes, Akka, ZIO, Cats, SQL, NoSQL, Azure, GCP, AKS, ElasticSearch, OpenSearch, Clickhouse, OpenTelemetry, Jaeger, Java, Python 🏢 Description: We successfully deliver an all-in-one tool - Synerise (YouTube link) . An ever-evolving behavioral data platform, enhanced by AI to generate outstanding ROI in more than 30 markets for industry leaders in Retail, Banking, eCommerce, Automotive, Insurance, and Telco, processing more than 150 billion transactions annually. However, we don't limit ourselves solely to this solution. We're building BaseModel (website link) - a foundation model for behavioral data embedded within a novel platform for enterprise Data Science teams, that is another step on our path to create innovation in AI and demonstrate its potential for the business world. ‍ Having such great solutions, we are looking for a highly motivated Backend Engineer to join our brave and brilliant Synerise Team. See if you fit our diverse and dynamic environment, where we constantly evolve together with the growth of our clients. About the team Our Backend Team works primarily with Scala , Apache Kafka , ElasticSearch , Clickhouse , Kubernetes , and cloud environments ( Azure and GCP ). Observability is a first-class concern: distributed tracing (OpenTelemetry, Jaeger), structured logging, and rich metrics are embedded into how we design and operate services. What will you do on a daily basis? Develop architecture and design patterns to process and store high volume data sets. Develop software with a core focus around optimisation and performance. Translate complex functional and technical requirements into detailed design. Perform analysis of vast data stores and uncover insights. What will make us a perfect match? Programming skills in Scala or other JVM language. Programming skills in Rust or willingness to learn. Solid understanding of Kafka and Kubernetes. Experience with (at least one): Akka / ZIO / Cats. Experience with SQL and NoSQL databases. Hands-on experience using AI coding (e.g., Claude Code, Cursor, GitHub Copilot) as part of daily software engineering work. Capacity to plan and scale systems to keep up with incredible growth. Excellent troubleshooting and debugging skills. A passion for building tools and automating everything. Strong analytical skills. What will convince us even more? Solid understanding of JVM internals (GC, profiling, heap and thread dumps). Experience designing and operating microservices architectures . Hands-on experience working in cloud environments ( Azure and/or GCP ), preferably with AKS. Working knowledge of Java or Python. Knowledge of ElasticSearch/Opensearch. Basic knowledge of AI/ML concepts. What can we provide for you? Work on a production-grade, large-scale system used by enterprise customers worldwide. Real technical challenges around performance, data volume, and distributed systems. Opportunities for continuous technical growth and deeper ownership over system design. Support from experienced engineers and a strong engineering culture. Influence on architectural and technical decisions within your team.

🏢 Summary: Senior Backend / Platform Engineer role focused on building and evolving a complex low-code / backend-as-a-service platform powered by AI, operating in a large production monorepo. The position involves designing scalable backend services, AI agents, runtime systems, and event-driven architectures on Google Cloud. It offers strong architectural impact, long-term product ownership, and work in a highly technical, AI-augmented engineering environment. 🗂️ Requirements: Minimum 7 years commercial backend development experience, Very strong TypeScript knowledge, Strong experience with Node.js and NestJS, Fastify or Express, Practical production experience with Google Cloud, Very good knowledge of PostgreSQL, SQL and Redis, Experience with service-oriented and event-driven architecture, Experience with asynchronous processing, queues, webhooks, triggers and background jobs, Ability to design stable API contracts, domain models and persistence mechanisms, Experience with containerization and runtime environments, Experience with Jest and integration testing, Ability to diagnose production issues based on logs, events and traces, Experience working in large monorepos, Experience working with AI tools in software development, Polish C2, English B2+ 📃 Skills: TypeScript, Node.js, NestJS, Fastify, Express, Go, PostgreSQL, SQL, Redis, GCP, Docker, Jest, Playwright, OpenAI, Gemini, Angular, AWS, Azure, WebSocket, SSE, PubSub, Eventarc, CloudTasks, CloudRun, Firestore 🏢 Description: 🚀 Senior Backend / Platform Engineer TypeScript, Node.js, GCP RevoEngine buduje zaawansowaną platformę low-code / backend-as-a-service wspieraną przez AI. Pracujemy nad dużym produkcyjnym monorepo, które obejmuje backend, runtime’y wykonawcze, automatyzacje, event-driven workflows, integracje, systemy kolejkowe, agentów AI, narzędzia developerskie oraz infrastrukturę działającą w multi cloud. To nie jest prosty CRUD ani klasyczny software house. Szukamy bardzo mocnego Senior Software Engineera, który chce budować technicznie wymagający produkt od środka i mieć realny wpływ na jego architekturę. 👤 Kogo szukamy? Szukamy osoby z mocnym backendowym doświadczeniem, która potrafi samodzielnie projektować, implementować i utrzymywać złożone systemy produkcyjne. Idealna osoba rozumie nie tylko kod aplikacyjny, ale też runtime, dane, kolejki, eventy, integracje, bezpieczeństwo, observability, testy, deployment i realne zachowanie systemu na produkcji. To rola dla seniora (albo aspirującego mocnego mida), który chce pracować nad ambitnym produktem technologicznym długofalowo, a nie nad dodatkowym projektem po godzinach, oraz kogoś kto chciałby w przyszłości zostać CTO . Oczekujemy bardzo krótkiego okresu wypowiedzenia albo kogoś bez zobowiązań poszukujący aktywnie jedynego projektu. 🤖 Jak pracujemy z AI? Codex i narzędzia AI są u nas podstawą codziennej pracy. Używamy ich do analizy kodu, projektowania zmian, pisania testów, refactorów, diagnostyki, dokumentacji i przyspieszania pracy w dużym monorepo. To nie oznacza jednak “ vibe codingu ” ani bezrefleksyjnego akceptowania wygenerowanych zmian. Oczekujemy bardzo mocnego human-in-the-loop : rozumienia architektury, świadomej kontroli nad kodem, weryfikacji zmian, pisania testów, czytania diffów i brania odpowiedzialności za efekt końcowy. Szukamy osoby, która potrafi wykorzystać AI jako mocne narzędzie inżynierskie, ale sama pozostaje właścicielem decyzji technicznych. AI może przyspieszać pracę, ale nie zastępuje seniorowego myślenia, odpowiedzialności i jakości. 🛠️ Nad czym będziesz pracować? • Rozwój dużej platformy backendowej działającej jako low-code / backend-as-a-service. • Budowa i rozwój własnego agenta AI oraz mechanizmów związanych z jego runtime’em, narzędziami, pamięcią, streamingiem, walidacją i automatyzacją pracy. • Projektowanie i implementacja usług backendowych w TypeScript / Node.js / NestJS / GO. • Praca nad runtime’ami wykonawczymi, integracjami, zadaniami asynchronicznymi, webhookami, triggerami i event-driven flows. • Rozwój API, modeli domenowych, kontraktów, migracji, warstwy danych i mechanizmów persystencji. • Praca z Google Cloud jako głównym środowiskiem produkcyjnym. • Projektowanie mechanizmów skalowania, odporności na błędy, retry policies, timeoutów, kolejek i procesów backgroundowych. • Rozwój narzędzi developerskich, systemów execution/sandbox oraz elementów infrastruktury runtime. • Analiza problemów produkcyjnych na podstawie logów, eventów, stanu bazy, trace’ów i rzeczywistego przepływu systemu. • Pisanie i utrzymywanie testów jednostkowych, integracyjnych oraz E2E. • Współpraca bezpośrednio z zespołem produktowym i technicznym przy decyzjach architektonicznych. ✅ Wymagania • Minimum 7 lat komercyjnego doświadczenia w tworzeniu aplikacji backendowych. • Bardzo dobra znajomość TypeScript. • Bardzo dobre doświadczenie z Node.js, NestJS, Fastify / Express i projektowaniem API. • Praktyczna znajomość Google Cloud jako środowiska produkcyjnego. • Bardzo dobra znajomość PostgreSQL, SQL, Redis oraz pracy z danymi w systemach produkcyjnych. • Doświadczenie z architekturą usługową, asynchronicznym przetwarzaniem, kolejkami, eventami, triggerami, webhookami i background jobs. • Umiejętność projektowania stabilnych kontraktów API, modeli domenowych, migracji i mechanizmów persystencji. • Praktyczne doświadczenie z konteneryzacją aplikacji i środowiskami uruchomieniowymi. • Doświadczenie z testami: Jest, testy integracyjne, mile widziany Playwright. • Umiejętność diagnozowania problemów produkcyjnych bez zgadywania. • Umiejętność pracy w dużym monorepo i rozumienie granic odpowiedzialności między modułami / pakietami / usługami. • Samodzielność techniczna i odpowiedzialność za jakość dowożonych rozwiązań. • Doświadczenie w pracy z narzędziami AI. • Język polski C2. • Język angielski B2+. ⭐ Mile widziane • Doświadczenie z OpenAI API (w szczególności response API oraz najnowsze modele). • Doświadczenie z Gemini API. • Doświadczenie w budowie agentów AI, workflow automation, runtime orchestration lub narzędzi dla developerów. • Doświadczenie z Go. • Doświadczenie z Angular przy złożonych aplikacjach enterprise. • Doświadczenie z platformami low-code / no-code. • Znajomość AWS lub Azure. • Doświadczenie z WebSocket, SSE, streamingiem eventów i realtime. • Doświadczenie z systemami sandbox / isolated execution / remote runtime. • Doświadczenie z Eventarc, Pub/Sub, Cloud Tasks, Cloud Run, Firestore lub podobnymi usługami cloud-native. 🎁 Co oferujemy? • W pełni zdalną współpracę. • Bezpośrednią współpracę B2B, bez pośredników. • Pracę nad własnym produktem, nie outsourcingiem. • Duży wpływ na architekturę i kierunek rozwoju platformy. • Pracę w małym, mocnym technicznie zespole. • Bardzo szeroki zakres technologiczny: backend, cloud, runtime, AI, automatyzacje, integracje i narzędzia developerskie. • Wymagające, ale bardzo rozwojowe środowisko. • Stabilną, długofalową współpracę. • Możliwość otrzymania udziałów po długoterminowej współpracy. • Spotkania i wyjazdy zespołowe kilka razy w roku. • Wynagrodzenie adekwatne do poziomu: rekomendowany zakres 150–200 PLN/h B2B, zależnie od doświadczenia, samodzielności i realnego wpływu na produkt. 🎯 Dla kogo ta rola jest dobra? • Dla seniora, który chce budować złożony produkt technologiczny, a nie tylko zamykać tickety. • Będziesz pracować przy dużym monorepo, agentach AI, backendzie, runtime’ach, triggerach, automatyzacjach, integracjach, infrastrukturze cloud i narzędziach developerskich. To środowisko, w którym liczy się samodzielność, jakość techniczna i umiejętność rozumienia całego systemu. • Jeśli szukasz spokojnego utrzymania prostych CRUDów, to prawdopodobnie nie będzie dobre miejsce. • Jeśli chcesz pracować nad platformą, w której po roku zdobędziesz doświadczenie większe niż w kilku typowych projektach enterprise, porozmawiajmy. ⚙️ Proces rekrutacyjny Krótkie spotkanie online, 25–30 minut Rozmowa o doświadczeniu, oczekiwaniach, dostępności i dopasowaniu do projektu, ustalenie warunków współpracy. Spotkanie techniczne, 60 minut Rozmowa o backendzie, architekturze, GCP, TypeScript, testach, runtime’ach, systemach produkcyjnych i sposobie podejmowania decyzji technicznych.

🏢 Summary: Senior Frontend Engineer role focused on building and maintaining guest-facing web experiences for a global QSR platform, including ordering, checkout, payments, and loyalty features. The position involves developing scalable React and Next.js applications with TypeScript, integrating headless AEM content and backend APIs, and ensuring high performance, accessibility, and SEO standards. You will collaborate in an Agile team with peer code reviews and automated testing across the full development lifecycle. 🗂️ Requirements: 4+ years of professional software engineering experience, Strong commercial experience with React and TypeScript, Hands-on experience with Next.js and server-side rendering, Proficiency with CSS Modules or Tailwind, Deep understanding of React fundamentals (hooks, context, lifecycle, performance), Experience with Redux Toolkit or equivalent state management, Experience with React Query or similar server-state management, Experience integrating RESTful APIs and token-based authentication, Experience with frontend testing (unit, component, accessibility), Familiarity with CI/CD pipelines (GitHub Actions, Azure DevOps, or equivalent), Strong understanding of SEO and Core Web Vitals optimization, Upper-intermediate English level 📃 Skills: TypeScript, React, Next.js, JavaScript, CSS, Tailwind, Redux, ReactQuery, REST, CI/CD, GitHubActions, AzureDevOps, AEM, GraphQL, Sentry 🏢 Description: ID72472 AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role We are looking for a Senior Frontend Engineer to build and maintain guest-facing web experiences for a global QSR platform, working across restaurant locator, menu browsing, online ordering, cart, checkout, payments, and loyalty. You will write clean TypeScript using React and Next.js App Router, implement AEM headless content, integrate backend ordering and authentication APIs, and maintain automated tests with attention to Core Web Vitals and accessibility standards. The role follows collaborative Agile practices with peer code review on every pull request. What you will do Build and maintain features across the full guest web experience, including restaurant locator, menu browsing, online ordering, cart, checkout, payments, and loyalty; Write clean, well-tested TypeScript following established coding standards with automated checks running on every commit; Implement AEM-delivered content and components using a headless architecture; Connect the site to backend services and third-party tools, including ordering APIs, authentication, payment processors, feature flags, and analytics; Work with product managers, designers, and backend engineers to turn requirements into working software; Participate in sprint planning and reviews; Implement solutions based on Figma designs; Align on API contracts; Review code from teammates; Incorporate review feedback into your own pull requests; Debug and fix issues across browsers using crash reporting tools, network traces, and performance profiling; Write and maintain unit, component, and integration tests with attention to accessibility and Core Web Vitals budgets; Help keep build and release pipelines healthy, including automated builds, preview deployments, and production releases; Participate in Agile ceremonies, including standups, sprint planning, refinement, and retrospectives; Stay current with the React and Next.js ecosystem and contribute to team-wide improvements, including performance and architecture initiatives. Must haves 4+ years of professional software engineering experience ; Strong commercial experience building production web applications with React and TypeScript ; Experience with CSS Modules or Tailwind ; Deep understanding of React fundamentals, including hooks, context, component lifecycle, and performance patterns; Hands-on experience with Next.js (App Router preferred) and server-side rendering patterns; Solid grasp of state management using Redux Toolkit or equivalent and server-state patterns using React Query or similar; Experience integrating RESTful APIs and token-based authentication flows; Practical experience with frontend testing, including unit tests, component tests, and accessibility checks; Familiarity with DevOps practices and CI/CD pipelines using GitHub Actions , Azure DevOps , or equivalent; Strong understanding of SEO, Core Web Vitals, and performance optimization techniques; Clear communicator who works well in a collaborative, cross-functional team; Upper-intermediate English level. Nice to haves Adobe Experience Manager (AEM) headless content delivery; Feature flag systems (e.g., LaunchDarkly); Web analytics or error tracking (Sentry, Adobe Experience Platform, Quantum Metric); GraphQL ; Accessibility (WCAG 2.1 AA) and internationalization (i18n) experience; Privacy and consent frameworks (e.g., OneTrust); Experience mentoring junior developers and leading code reviews. The benefits of joining us Professional growth: Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps Competitive compensation: We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities A selection of exciting projects: Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands Flextime: Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive. Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match — you’ll get an offer!