Lead Developer Engineer - Application Platform (m/f/d)

AP Sensing GmbH; Böblingen; On-site; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Half-yearly bonus

Annual salary increases

Holiday bonus

Company pension scheme

Meal subsidy for lunch catering

Company laptop and home office options

Job summary

AP Sensing GmbH is seeking an experienced Lead Developer Engineer (m/f/d) for its headquarters in Böblingen. The role focuses on designing and building a cloud‑native, multi‑tenant asset monitoring platform for distributed fiber optic sensing solutions, with emphasis on secure APIs and scalable data models.

You will lead technical decisions, collaborate with application teams, and evolve the platform architecture to support field solutions such as fire detection and critical infrastructure

Qualifications

• Degree in computer science, software engineering or similar.
• 8+ years as a .Net developer with 5+ years of production‑grade distributed systems experience, ideally in IIoT or sensor monitoring.
• Strong C# and modern .NET skills with high‑quality, maintainable code.

Responsibilities

• Design and implement a cloud‑native, multi‑tenant, secure asset monitoring platform for distributed fiber optic sensing solutions.
• Build robust, secure, observable platform components, data models, interfaces and APIs.
• Evolve the application platform architecture to support field applications like fire detection and critical infrastructure monitoring.
• Provide technical leadership by applying expertise, designing concepts and guiding decision making.

Skills

C# & .NET

Distributed systems

Kubernetes

Messaging systems (NATS, MQTT, Kafka)

API design

German (C1)

English (C1)

On-site 50%

Education

Degree in Computer Science or Software Engineering

Tools

Kubernetes (K8s)

Job description

WE ARE AGAIN AWARDED AS TOP ARBEITGEBER 2026!

At AP Sensing, we’re building on a success story that began in the garage of Bill Hewlett and Dave Packard. As an independent HP spin-off, we combine over 40 years of technological expertise with a passion for innovation.

Together we’ll continue to enhance infrastructure, protect people, and safeguard our planet. With a commitment to fiber optic sensing, we value every voice and empower growth. Join us in thinking ahead to create a smarter, safer world.

For our headquarters in Böblingen we are searching an experienced Lead Developer Engineer (m/f/d). As part of AP Sensing, you will immerse yourself in a fascinating world: Together we take measurement technology to the limits of physics. We use fiber optic cables as sensors and build measuring devices and software that measure temperatures and acoustic signals along the fiber with meter precision.

Your Responsibilities

• You design and implement a cloud-native, multi-tenant and secure asset monitoring platform for distributed fiber optic sensing solutions
• You build robust, secure and observable platform components, data models, interfaces and APIs
• You evolve the application platform architecture, to support building solutions for field applications like fire detection, critical infrastructure monitoring or power grid solutions
• You proactively engage with application teams to understand their domain and their needs
• You provide technical leadership by applying your expertise, designing concepts, proposing effective solutions and guiding the decision-making process

Your Profile

• You have a degree in computer science, software engineering or similar
• You have worked as a .Net developer for at least 8 years, 5 of which you designed, built and operated production‑grade distributed systems, ideally within IIoT or sensor‑based monitoring environments.
• You have excellent programming skills in C# and modern .NET and you write high‑quality maintainable code. Knowing further languages is a plus.
• You have strong hands‑on experience with K8s and messaging systems (e.g., NATS, MQTT, Kafka). Knowledge of event driven architectures and distributed stream processing is a plus.
• You have good knowledge of web‑and mobile technologies, protocols, and frameworks (Angular is a plus) and persistence
• You know common design‑and architecture patterns and best practices in API design
• You have a strong hands‑on mentality and you have the drive to create
• You speak German and English at C1 level
• You are willing to work on‑site 50%

Our Offer

• half‑yearly bonus distribution (depending on company performance)
• annual salary increases
• holiday bonus
• AP Sensing Card with 50 Euro credit per month
• permanent employment contract with job security
• company pension scheme
• participation in the Corporate Benefits Program
• meal subsidy for the lunch catering
• free drinks and fresh fruit
• job‑bike offer
• career opportunities due to steady, healthy company growth
• flat hierarchies and very collegial relationship with managers
• very positive and appreciative working atmosphere
• international and intercultural team
• flexible working hours and home office options
• company laptop for everyone
• ideal work‑life balance
• regular company and team events
• employee training and education
• new and fully equipped kitchen with high‑tech coffee machine
• kiosk in the building
• large, bright and air‑conditioned offices
• modern office equipment with creative spaces
• height‑adjustable desks for ergonomic working
• 2 minutes to the S-Bahn and motorway
• free parking spaces
• sports facilities: weekly fitness coach
• showers available (for cyclists or "lunch break joggers")

Are you ready to play a BIG role in a small team instead of a SMALL role in a big team?