Senior Backend Software Engineer

Backend engineering experience

• Strong experience with Java or Python
• Experience building microservices and distributed systems
• Experience designing and building REST APIs
• Experience with relational databases such as PostgreSQL or MySQL

Cloud-native systems

• Experience with Docker and Kubernetes
• Experience building systems in AWS, GCP, or Azure

Architecture & technical leadership

• Ability to design scalable and maintainable systems
• Experience driving technical decisions across teams
• Strong system-level thinking and ability to evaluate architectural trade-offs
• Experience mentoring engineers and guiding design discussions

Engineering mindset

• Strong ownership and attention to detail
• Commitment to code quality, testing, and maintainability
• Pragmatic problem solver focused on delivering value
• Strong communication skills in English

Nice to Have ✨

• Event-driven architectures ( Kafka, RabbitMQ )
• Data streaming or processing systems ( Debezium, ClickHouse )
• Authentication and authorization ( SAML, OAuth2, OIDC )
• Observability tools ( Prometheus, Grafana, Datadog, ELK )
• Experience building large-scale SaaS platforms
• Exposure to AI or LLM integrations

LumApps is now more than just an Employee Experience Platform — it is an AI-powered Employee Hub that supports companies in their digital transformation of communication, collaboration, and engagement with their customers, partners, and above all their employees.

Our platform is a proven leader in this dynamic market with a truly unique vision and product. It has been deployed by Fortune 500 clients around the world and is delivering meaningful business benefits. LumApps is identified as a leader in Gartner's Magic Quadrant for Intranet Packaged Solutions as well as in Intranets Forrester Wave, and regularly selected for the French Tech Next40/120 program.

✨ In 2025, LumApps strengthened its leadership position by partnering with Beekeeper , a pioneer in frontline employee experience solutions. This strategic collaboration expands our reach and impact across all types of workers — from HQ to the frontline.

With a team of over 600 Lumies spread across 11 offices (Lyon, Paris, Lille, Sophia Antipolis, London, Barcelona, Hamburg, Austin, Tokyo, Zurich, Krakow), we support large enterprises all around the world. Over the past year, we have been driving an ambitious phase in our journey under the impulse of our new shareholder Bridgepoint, aimed at propelling us to become the clear leader in our market and shine worldwide in our industry. We are looking for individuals who are excited to actively participate in this transformation.

*Team*

You will join the People & Growth Tribe , whose mission is: “Give employees easy access to everything they need to get ready for and get better at work. ”

The tribe focuses on building solutions that help employees grow, stay engaged, and easily interact with HR processes. This includes areas such as:

• Learning & development — helping employees find and complete the training they need workflows referrals
• HR processes — onboarding, offboarding, PTO, shift management, and other employee
• Engagement & recognition — pulse surveys, badges, appreciation, and employee

Within the tribe, your team focuses primarily on HR workflows and employee onboarding experiences , including:

• Employee surveys and feedback systems
• The “My Portal” dashboard , giving employees a central place to access HR tools and processes
• Onboarding experiences that help employees get productive quickly
• AI-powered solutions that assist employees during onboarding and everyday HR interactions

Why You’ll Love Working at LumApps

We’re proud to offer a work environment where people feel supported, valued, and empowered. Here’s a peek at what we offer if you are based in Poland :

Phone & Home Internet costs reimbursement up to 80 PLN/month

️ Private health care package with Luxmed – covered for you and partially for your partner / family

‍♀️ Cafeteria benefits – monthly budget to cover sport cards or other purchases

Creative Allowance – paid as 1000 PLN gross/month

Home office set-up reimbursement up to 1000 PLN

26 days of annual leave/year and 2 Mental Health days off per year

Benefits listed above are part of the compensation package for contract of employment.

,[Design, build, and maintain scalable backend services, Help shape the architecture and technical direction of backend systems within the tribe, Drive technical initiatives that span multiple teams, Write clean, maintainable, and well-tested code, Deploy, monitor, and optimize services in production, Collaborate with product managers, designers, QA, and engineers to deliver impactful features, Mentor engineers and promote strong engineering practices, Identify and address technical debt and foundational improvements, Help maintain reliable and secure systems, including participation in on-call rotations] Requirements: Java, Python, REST API, PostgreSQL, MySQL, Problem-Solving, Communication skills, Docker, Kubernetes, AWS, Azure, GCP, Kafka, RabbitMQ, Debezium, ClickHouse, SAML, OAuth2, OIDC, Prometheus, Grafana, Datadog, ELK, SaaS, AI, LLM