June 3, 2026

Software Engineer (Java)

Mid • Hybrid

Warsaw, Poland

Company Description

At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for job seekers and companies around the world to find a perfect match, in a fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring.

At our Tech Hub, located near Wilanowska Metro, we are more than 300 ambitious specialists working on the development of our IT products. We are proud to be part of The Stepstone Group, a global expert in job-tech platforms and e-recruiting.

Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the world’s leading job-tech platform.

Job Description

The job at a glance

Team Mélange builds AI- and rule-based parsing and normalization solutions that turn unstructured job and CV data into structured signals used across the Stepstone marketplace. Our services are consumed as APIs by teams across the organisation.

Join our team and you’ll help build, scale, and operate these services.

Working in the Mélange team you will contribute to backend systems that power data processing across the organisation, working closely with engineers across multiple domains.

This is so important to us. By joining our team, you will play a vital role as we reimagine the labour market to make it work for everybody.
 

Your responsibilities

  • Build and maintain backend services and APIs using Java and Python

  • Work on event-driven data pipelines based on Kafka

  • Take ownership of services end-to-end: design, testing, deployment, monitoring, and iteration

  • Ensure code quality, including writing and maintaining automated tests

  • Collaborate with Software Engineers, ML Engineers, and a Product Manager in a distributed, international team

Qualifications

Your skills and qualifications

  • You write clean, testable backend code in Java and/or Python

  • You are comfortable working with distributed systems and event-driven architectures (or willing to grow in this area)

  • You take ownership of services across their full lifecycle

  • You care about code quality, including automated testing

  • You have a pragmatic mindset and focus on delivering working solutions

👉 You don’t need to tick every box to apply – we value different perspectives and are happy to support your growth in areas that are new to you.

Additional Information

Software/Hardware 

  • Mac/Dell laptop 

  • Windows/macOS system 

  • 2 monitors (24", 27", or 32") 

  • Adjustable desks 

  • Slack + Teams 

  • Atlassian tools: JIRA, Confluence 

Your benefits 

We’re a community that cares as much about your life outside work as how you feel when you’re with us. Because your job shouldn’t take over your life — it should enrich it. Here are some of the benefits we offer: 

  • Premium medical and dental care 

  • Life insurance 

  • Flex Benefits – Worksmile Cafeteria System (Multisport, vouchers, tickets, etc.) 

  • Employee Referral Program 

  • Hackathons, Knowledge Sharing Hours, In-house projects 

  • Tech and sport communities 

  • Events and integration parties 

  • Charity initiatives and 2 extra volunteer days 

  • English/German classes 

  • Game room and chillout zone 

Our commitment 

Equal opportunities are important to us. We believe that diversity and inclusion at The Stepstone Group are critical to our success as a global company, so we want to recruit, develop, and keep the best talent. 

We encourage applications from everyone, regardless of background, gender identity, sexual orientation, disability status, ethnicity, belief, age, family or parental status, and any other characteristic. 

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The position involves owning end-to-end product development across frontend, backend, AI systems, infrastructure, analytics, and mobile technologies while rapidly prototyping and scaling consumer-facing products. 🗂️ Requirements: 8+ years of software engineering experience, Staff, Principal, founding engineer, or technical lead experience, Experience building and shipping consumer products, Full-stack engineering expertise, Experience with backend systems and cloud infrastructure, Experience with mobile development, Experience building AI-powered products, Knowledge of reliability, privacy, security, and scalability, Ability to work in fast-moving zero-to-one environments, Strong communication and cross-functional collaboration skills 📃 Skills: React, ReactNative, Swift, Kotlin, Flutter, AI, ML, Cloud, Backend, Frontend, Analytics, Infrastructure, Observability, Security, Privacy, Mobile 🏢 Description: Know where you belong! Match Group is a leading provider of dating products across the globe. Our portfolio includes Tinder, Hinge, Match, Meetic, PlentyOfFish, OkCupid, The League, HER, and others, each designed to spark meaningful connections for singles worldwide. Creating a sense of belonging doesn’t stop at our products - it’s the foundation of every team we hire. When it comes to dating, the connection starts online, but the real magic happens once you meet in real life (IRL). We think the same is true for creating the best platforms, so we work together IRL 3 days/week. At Match Group, our mission is to spark meaningful connections for every single person worldwide. Across our portfolio of trusted brands, we help millions of people discover, connect, date, and build relationships in ways that reflect their identities, intentions, cultures, and communities. We work together to solve complex problems at the intersection of human connection, behavioral science, network economics, AI and ML, safety, privacy, cultural nuance, loneliness, love, sex, and relationships. As the world’s leading portfolio of dating products, Match Group has a unique opportunity to imagine what comes next for dating — including how emerging technologies can help people feel more understood, more intentional, and more confident as they connect. The Team Match Group is building an internal incubation focused on AI-powered dating experiences to redefine the category. Dating is a deeply human experience, but many of today’s products were built before AI could understand context, intent, nuance, and feedback at scale. We believe there is an opportunity to rethink parts of the dating experience from first principles, combining strong consumer product craft with AI-native systems that help people connect with more confidence, clarity, and trust. This team will operate like a small startup inside Match Group. We are moving from product hypothesis to prototype to pilot, with the goal of learning quickly from real users and identifying whether there is a new product opportunity that can scale. The Role We’re looking for a Founding Full Stack Engineer, AI Incubation to be the technical owner for this initiative. This is a hands-on, high-ownership role for a Staff/Principal-level engineering leader who can build quickly, make strong technical decisions, and help turn an early product thesis into a working product. You’ll work directly on the core experiences users rely on to discover, evaluate, and build meaningful connections. You’ll identify where today’s dating experiences create friction, ambiguity, or low-quality outcomes, and rethink how AI can help create a more useful, trusted, and personalized experience. You should be excited by zero-to-one product building: taking an ambiguous opportunity, defining the fastest path to learning, building the first version, putting it in front of users, and iterating based on real behavior. How you’ll make an impact - Build end-to-end product experiences that span frontend applications, backend services, agent workflows, cloud infrastructure, integrations, and internal tooling. - Design AI-powered systems that help the product understand user intent, reason about compatibility, personalize recommendations, and improve through feedback over time. - Partner closely with product, design, and research to rapidly translate insights into prototypes, pilots, and production-ready features. - Use frontier AI tools and modern engineering workflows to compress the path from idea to working product, while maintaining strong technical judgment around reliability, privacy, and scale. - Instrument the product with analytics, event tracking, dashboards, and experimentation tools so the team can evaluate engagement, retention, quality, and product-market signal. - Improve the reliability, observability, scalability, and performance of the systems and workflows you build. - Define the early system architecture and technical roadmap, and serve as a strategic technical thought partner to Match Group leadership. We could be a match if you: - 8+ years of software engineering experience, including experience operating at Staff, Principal, founding engineer, technical lead, or equivalent level. - A track record of building and shipping consumer products in fast-moving environments, ideally across zero-to-one, early-stage, or startup contexts. - Deep full-stack technical range, with the ability to move independently across product surfaces, backend systems, data architecture, infrastructure, and production operations. - Experience with mobile development using React Native, Swift, Kotlin, Flutter, or similar technologies. - Experience working with modern AI development workflows and practical experience building AI-powered products used by real users. - High technical judgment around reliability, privacy, security, observability, maintainability, and scale. - Clear communication skills and the ability to serve as a trusted technical partner to product, design, research, engineering, and senior leadership. - Strong ownership mindset, with the ability to operate without a large team, detailed specs, or fixed roadmap. - High judgment around consumer trust, identity, privacy, and emotionally personal user experiences. Nice to have: - Experience in dating, social discovery, consumer social, messaging, marketplaces, creator platforms, gaming, community products, or subscription-based consumer products. - Experience building AI-native consumer products or AI-powered features used by real users. - Experience with recommendation systems, ranking systems, personalization, matching, marketplace liquidity, network effects, or consumer discovery systems. - Prior experience as a founder, founding engineer, early startup employee, or zero-to-one product builder. Our Values - Take the Lead: We don't ghost our work or each other. - Move Fast: We have a bias for action and urgency. - Better Together: We keep connection at the heart of dating and at the heart of how we work. - Real Talk: We say the hard thing the human way. - Safety First: We act with integrity, transparency, and consistency so people feel safe. - Spark Fun: We have fun to unlock creativity, fuel innovation, and help us build better experiences for daters. Why Match Group? - Mind & Body – Medical, mental health, and wellness benefits to support your overall health and well-being. - Financial Wellness – Competitive compensation, 100% employer match on 401k contributions up to 10% (cap at $10,000), as well as an employee stock purchase program. - Unplug – Generous PTO and 14 paid holidays. - Career – Annual training allowance for professional development and ERG membership opportunities and events. - Family – 20 weeks of 100% paid parental leave, fertility, adoption, and child care resources, as well as pet insurance and discounts. - Company Gatherings – Company events to build connection and belonging. We are proud to be an equal opportunity employer and we value the rich dynamics that diversity brings to our company.

Technology

Vaillant Group Business Services

Fullstack Developer

Mid

Hybrid

Katowice, Poland

16,000 - 22,000 PLN

🏢 Summary: Fullstack Developer role focused on building advanced planning applications and scalable digital solutions for international markets. The position involves developing backend APIs, creating responsive user interfaces, managing cloud-based environments, and owning the platform lifecycle including CI/CD and automated testing. You will work in an interdisciplinary team using modern technologies and AI-supported tools to deliver secure and high-performance enterprise systems. 🗂️ Requirements: Degree in Computer Science, Software Engineering or related field, Minimum 3 years of fullstack development experience in enterprise environments, Strong expertise in React, Strong expertise in Next.js, Strong expertise in Node.js, Strong expertise in Java, Strong expertise in Spring Boot, Experience with REST APIs, Knowledge of databases, Experience with cloud environments (Microsoft Azure), English proficiency at minimum B2 level 📃 Skills: React, Next.js, Node.js, Java, Spring, SpringBoot, REST, SQL, Azure, Docker, Kubernetes, Terraform, CI/CD, AI, LLM, Scrum, Kanban 🏢 Description: What we achieve together By designing advanced planning applications, you contribute directly to the scalability of our digital solutions across international markets. Your responsibilities will include developing robust backend APIs for scheduling, allocation logic, and core platform modules. Together with an interdisciplinary team, you create responsive user interfaces with strong focus on performance, accessibility, and data visualization You actively shape your own AI-supported development environment using modern tools to increase efficiency and innovation. From architectural strategy to operations, you take ownership of the platform lifecycle, including CI/CD and cloud-based environments. Through designing and implementing automated tests, you ensure a stable, secure, and future-proof product landscape. What makes us successful together Qualification: You hold a degree in Computer Science, Software Engineering, or a comparable field. Experience: You bring at least 5 years of hands-on experience in fullstack development within complex, enterprise environments. Know-how and skills: You have strong expertise in React, Next.js, Node.js, as well as Java and Spring Boot, combined with solid knowledge of REST APIs, databases, and cloud environments such as Microsoft Azure. Nice to have: Experience with Docker, Kubernetes, Terraform, CI/CD pipelines, and the integration of AI or Large Language Models will help you stand out. Personality: You are a collaborative team player who enjoys sharing knowledge and thrives in agile environments such as Scrum or Kanban. Language skills: You communicate confidently in English at a minimum B2 level What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

Technology

Capgemini

Senior Software Engineer (Python, German)

Senior

Hybrid

Wroclaw, Poland

🏢 Summary: Senior Python engineering role focused on building scalable cloud-based backend systems and AI/GenAI solutions, including LLM integrations. The position combines hands-on development, architecture design, technical leadership, and mentoring within international teams. 🗂️ Requirements: 5+ years of Python development experience, Experience designing scalable software architectures, Knowledge of Streamlit, Knowledge of Flask, Knowledge of SQLAlchemy, Knowledge of Celery, Experience with NumPy, Experience with Pandas, Experience with Scikit-learn, Experience with TensorFlow, Experience with Keras, Experience with LangChain, Hands-on experience with LLMs, Experience with embeddings and vector databases, Experience with API and database integration, Fluent German (minimum B2), Good English communication skills 📃 Skills: Python, Streamlit, Flask, SQLAlchemy, Celery, NumPy, Pandas, Scikit-learn, TensorFlow, Keras, LangChain, GPT-4, LLaMA, LLM, Embeddings, APIs, Databases, Cloud, Java, GenAI 🏢 Description: Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world. Your role You will play a key role in designing and delivering scalable Python-based solutions in cloud environments. Working with international teams, you will contribute to complex software systems, support AI and GenAI initiatives, and influence technical standards across projects. You can expect a role with real impact, combining hands-on development, architecture design, and knowledge sharing within a strong engineering community. Your tasks design and develop scalable back-end solutions using Python in cloud environments; contribute to solution architectures across Python, cloud and Java-based systems; act as a technical consultant or lead in Python development projects; support AI and GenAI initiatives, including LLM-based solutions; promote clean code, best practices, and high engineering standards; mentor team members and share technical knowledge through workshops. Your profile Python Expertise: Over 5 years of experience in writing high-quality, scalable code and designing robust software architectures using libraries like Steamlit , Flask, SQLAlchemy, Celery etc; preferred AI Development Proficiency: Strong knowledge of Python libraries such as NumPy, Pandas, Scikit-learn, TensorFlow, and Keras, with practical experience in building AI-powered applications; preferred AI and LLM Skills: Expertise in frameworks like LangChain and hands-on experience with large language models (e.g., GPT-4, LLaMA). Proficient in working with embeddings, vector databases, and prompt engineering; System Integration: Proven ability to seamlessly integrate AI components with other system elements (e.g., APIs, databases) to deliver cohesive solutions; fluent German (min B2) is mandatory. Good command of English is required; continuous Learning: Eager to adopt new technologies and embrace technical challenges; collaboration and Independence: Highly organized, self-reliant, and passionate about sharing knowledge. Strong communication and teamwork abilities. What You'll love about working here? 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. 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. Enjoy hybrid working model that fits your life - after completing onboarding, connect work from a modern office with ergonomic work from home, thanks to home office package (including laptop, monitor, and chair). Ask your recruiter about the details. 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. 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 . 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 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 2024 global revenues of €22.1 billion.

Technology

RemoDevs

Backend Python Developer

Mid

On-site

Warsaw, Poland

5,000 - 6,000 USD/mo

🏢 Summary: Backend engineering role focused on building scalable Python services and APIs for an AI platform used by enterprise customers. The position involves developing production backend systems, integrating AI components, and improving reliability in a collaborative engineering environment. Offers modern AI tooling, cloud-native development exposure, and growth opportunities within an AI-focused product team. 🗂️ Requirements: 2–5 years of backend application development experience, Python, REST APIs, Backend services, SQL, PostgreSQL, Asynchronous programming, Background job processing, AWS, Azure, GCP, Testing, Version control, AI development tools, English B2 📃 Skills: Python, FastAPI, Django, PostgreSQL, SQL, AWS, Azure, GCP, Docker, Redis, RabbitMQ, Kafka, TypeScript, REST, Git, CI/CD, ChatGPT, Copilot, Codex, Claude 🏢 Description: About Us Many companies want to use AI agents, but these agents often struggle with real business tasks. We solve this problem by building a platform that helps AI understand business rules, workflows, and processes. This enables AI to make better decisions and provide accurate, reliable, and trustworthy results. Our technology is used by leading companies across multiple industries to automate up to 85% of customer cases, reduce handling time by 20–25%, and complete tasks that previously took hours in just seconds. We work with leading technology partners and have been recognized for our innovative approach. Our mission is to help people everywhere get better answers through AI. About the Role We are looking for a Mid Backend Engineer to help build scalable backend services that power our AI platform. You'll work closely with experienced backend engineers, frontend developers, product managers, and platform engineers to develop new features, improve existing systems, and deliver reliable production software. This is a great opportunity to work on modern AI infrastructure while growing your technical skills in a collaborative engineering environment. Responsibilities - Build and maintain backend services, APIs, and background processing systems. - Develop scalable application logic using Python. - Collaborate with product managers and engineers to deliver new product features. - Integrate backend services with databases, external APIs, and AI components. - Monitor, troubleshoot, and improve production services. - Write clean, maintainable, and well-tested code. - Participate in code reviews and engineering discussions. - Improve development workflows using AI tools and automation. - Continuously learn from production feedback and contribute to improving system reliability and performance. Requirements - 2–5 years of experience building production backend applications. - Good knowledge of Python. - Experience building REST APIs and backend services. - Understanding of relational databases (PostgreSQL or similar) and SQL. - Familiarity with asynchronous programming and background job processing. - Basic understanding of cloud platforms such as AWS, Azure, or GCP. - Understanding of software engineering best practices, testing, and version control. - Good communication skills and willingness to collaborate across engineering and product teams. - Experience using AI development tools such as GitHub Copilot, Claude Code, ChatGPT, or similar. - English at B2 level or higher. Nice to Have - Experience with FastAPI, Django, or similar Python frameworks. - Experience working with Docker and CI/CD pipelines. - Familiarity with Redis, RabbitMQ, Kafka, or similar messaging technologies. - Experience building AI-powered applications or integrating LLM APIs. - Basic knowledge of TypeScript or frontend development. - Interest in distributed systems and cloud-native architectures. What We Offer - 20,000–24,000 PLN B2B (depending on experience). - Company stock options. - MacBook Pro. - Modern technology stack with opportunities to contribute to open-source projects. - Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, and MCP Servers. - The opportunity to work on production AI systems used by enterprise customers. - A collaborative engineering culture focused on learning, ownership, and continuous improvement. - Career growth alongside experienced engineers in a fast-growing AI company. Our Culture and Values - Quality - We build reliable software with attention to detail and long-term maintainability. - Momentum - We move quickly, learn continuously, and improve through iteration. - Accountability - We take responsibility for our work and communicate openly. - Hard Work - We solve ambitious problems together and support each other along the way. - Learning Agility - We stay curious, embrace feedback, and continuously develop our skills. - Adapt and Thrive - We welcome change and see challenges as opportunities to improve. - Win Together - We collaborate, share knowledge, and succeed as one team.