Senior Backend Engineer - Typescript
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Key skills for this role
About the Role
Responsible for designing and maintaining AI-focused SDKs, backend services, and integrations using TypeScript and Node.js, while collaborating with product teams.
Key Skills for This Role
Responsibilities
- Design, implement, and maintain AI focused SDKs for seamless communication between AI services and application layers
- Build backend services and integrations that make AI capabilities consumable across products and teams
- Develop and maintain API integrations and Model Context Protocol (MCP) servers for AI agents
- Design and own a versioned rule/policy engine and supporting business logic for integrity systems
- Model decision records, state transitions, and audit trails for explainable integrity outcomes
- Partner with integrity/ML lead to consume risk scoring outputs and define enforcement action contracts
- Ensure type safe, scalable, and high performance TypeScript code following backend best practices
- Collaborate with frontend engineers to define AI data contracts, schemas, and interfaces
- Optimize AI related data flows including streaming responses and real time interactions
- Mentor mid and junior level engineers and uphold strong engineering and testing standards
- Participate in architecture discussions, code reviews, and technical decision making
Requirements
- Strong experience with TypeScript and Node.js
- Experience designing and implementing SDKs
- Experience building backend services and API integrations
- Experience with rule/policy engine design
- Knowledge of AI/ML integration patterns
- Experience with versioned systems and audit trails
- Ability to mentor mid and junior level engineers
Full Job Posting
Role Overview
- Salla is looking for a Senior Backend Engineer to join our AI team.
- This role focuses on building the integration and infrastructure layer that connects our AI capabilities to production systems.
- You will be responsible for enabling AI features to operate reliably, securely, and at scale across the Salla ecosystem.
- Alongside this, you'll contribute to our integrity systems by owning the rule engine and business logic that turn risk signals into auditable enforcement decisions.
- This role is backend first, with a strong emphasis on TypeScript, Node.js, SDK ownership, and system integrations.
Key Responsibilities
- Design, implement, and maintain AI focused SDKs that enable seamless communication between AI services and application layers
- Build backend services and integrations that make AI capabilities consumable across Salla's products and teams
- Develop and maintain API integrations and Model Context Protocol (MCP) servers that allow AI agents to interact with internal systems, external tools, and databases
- Design and own a versioned rule/policy engine and the supporting business logic for Salla's integrity systems translating risk signals and model scores into auditable decisions (state policy action), with enforcement/actuation owned by the product team
- Model the decision records, state transitions, and audit trails that keep integrity outcomes explainable and reversible (appeals, overrides)
- Partner with the integrity/ML lead to consume risk scoring outputs, and with product teams to define the enforcement action contracts the engine emits against
- Ensure type safe, scalable, and high performance TypeScript code, following backend best practices
- Collaborate closely with frontend engineers to define AI data contracts, schemas, and interfaces
- Collaborate with frontend teams on integration contracts for AI powered features when needed
- Optimize AI related data flows, including streaming responses and real time interactions
- Mentor mid and junior level engineers and uphold strong engineering and testing standards across AI and integrity services
- Participate in architecture discussions, code reviews, and technical decision making
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