Lyon

LumApps•Webster, MA

20d

About The Position

We are looking for a Senior Backend Software Engineer to design and build scalable backend systems that power critical parts of our platform. In this role, you will help shape the technical direction of backend systems within the tribe, drive complex initiatives across teams, and ensure our architecture remains scalable, maintainable, and secure as the platform grows. You will take ownership of systems throughout their lifecycle — from design and development to deployment and operations — while mentoring engineers and contributing to engineering standards across the tribe. 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

Requirements

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
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
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 Haves

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

Responsibilities

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

Benefits

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

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