Job description:
We're helping our client, scale and optimize key parts of their technical platform. These five roles span across Developer Experience, System Architecture, Observability, Java Performance, and Service Engineering.
If you're a senior developer with strong backend skills and experience in high-availability environments – this is for you.
**When applying, please mention the role number and title you're applying for**
**Please submit the following**
* CV
* Availability
* Hourly rate
* How you match the specific position and your experience aligned to that role
Start: ASAP
Duration: 31st Dec 2025
- possible extension
Location: Hybrid setup from Stockholm
- Must be based in Stockholm.
### Common Traits We're Looking For:
* Strong backend/fullstack development background
* Experience in complex, high-availability systems
* Self-motivated with a can-do attitude
* Comfortable challenging and improving existing setups
Tech Stack:**Java, Kotlin, React, AWS, Kafka, Kubernetes PostgreSQL among others.**
#### **Role 1: DevEx-Focused Fullstack Developer**
**Goal:** Enhance developer experience, availability, and observability.
You’ll join a team working to improve communication infrastructure. You’ll drive testing standards and observability, and create tools that simplify and accelerate development.
**Key skills:**
* Strong backend/fullstack experience
* Developer Experience (DevEx) tooling
* Availability and observability best practices
* Testing standardization
#### **Role 2: Architecture Bridge & Systems Explorer**
**Goal:** Bridge current system architecture with new technical approaches (TA).
You'll work closely with the team to assess existing architecture, identify reusable components, and challenge technical assumptions. Strong analytical skills and the ability to navigate unknown systems are key.
**Key skills:**
* Backend/fullstack experience
* Architecture analysis and optimization
* legacy systems understanding
* Hands-on, curious mindset
#### **Role 3: Infrastructure & Monitoring Specialist**
**Goal:** Improve service observability and configuration within existing layers.
You’ll analyze current services, implement smart configuration changes, and enhance monitoring across systems. You should be confident working independently and bringing clarity to complex setups.
**Key skills:**
* Kafka, Istio, Datadog, Grafana
* Observability & monitoring
* Self-driven, analytical problem-solver
* Backend/fullstack focus
#### **Role 4: Java Performance & Scalability Engineer**
**Goal:** Optimize backend technologies for performance, scalability, and availability.
You’ll take lead in driving the **Technical Architecture (TA)** and **Availability Roadmap**, focusing on backend performance tuning and fullstack optimization to support scalable systems.
**Key skills:**
* Strong Java backend experience
* System performance & scalability optimization
* Availability-focused engineering
* TA roadmap execution
#### **Role 5: Java Backend Developer – Service Builder & Feature Flagging**
**Goal:** Challenge status quo and improve team capability in Initiation and Routing.
You’ll join a team needing capacity to take on Initiation services and potentially Routing. With your background in building services at scale, you’ll help implement **progressive rollout** and **feature flagging** for availability improvements.
**Key skills:**
* Senior Java backend development
* Progressive rollout & feature flagging
* Ability to challenge and improve current practices
* Experience from high-scale service environments