Software Engineer TypeScript

Next Ventures; Greater London; Hybrid; GBP 74,000 - 92,000; Full time

Job summary

Next Ventures seeks a TypeScript Developer focused on data integration and event platforms. You will build backend services with TypeScript/Node.js, deployed on AKS through automated CI/CD pipelines, and work with stakeholders to align technical solutions with business goals.

Perfect for developers with 3–5 years’ experience, strong API/ETL skills, and a desire to operate across data integration lifecycle in a hybrid, 6-month+ extension freelance role.

Qualifications

• 3–5 years of commercial TypeScript/Node.js experience.
• Strong backend focus: APIs, integration services, messaging.
• Solid SQL/NoSQL knowledge with testing practices.

Responsibilities

• Understand data flow and requirements with stakeholders.
• Define data mappings and transformation rules.
• Build event-driven back-end services and data processing components.
• Ensure quality via automated tests and CI/CD pipelines.

Skills

TypeScript

Node.js

APIs

Data integration

SQL

NoSQL

Testing

English

Tools

Docker

Kubernetes

CI/CD

Azure

Job description

Hi, Our client a major company in the transportation is currently looking for a Software Engineer (Typescript) - Data Integration & Event Platforms.

The Role

As a TypeScript Developer, you'll be involved throughout the full software delivery lifecycle, from requirements analysis through to deployment and production support. You'll collaborate closely with product owners, business analysts, system owners, and fellow engineers to ensure solutions are both technically robust and aligned with business objectives.

This is a hands-on backend engineering position where you'll develop services using TypeScript and Node.js, deployed to Azure Kubernetes Service (AKS) through fully automated CI/CD pipelines.

Key Responsibilities

Functional Analysis

• Work closely with stakeholders to understand integration and data flow requirements.
• Analyse source and target systems to define data mappings, transformation rules, and error-handling strategies.
• Produce clear functional and technical specifications with measurable acceptance criteria.
• Challenge and refine requirements where necessary to ensure alignment with data models and architectural standards.

Software Development

• Build and maintain event producers, consumers, APIs, connectors, and data processing services.
• Develop reusable platform components, SDKs, libraries, and shared services.
• Implement event‑driven solutions following established engineering standards and best practices.
• Deliver high-quality code through automated testing, peer reviews, and continuous integration processes.

Operations & Continuous Improvement

• Deploy and support services through automated delivery pipelines.
• Monitor application performance and integration health using observability tools.
• Investigate and resolve integration, performance, and data‑quality issues.
• Contribute to engineering standards, tooling improvements, and technical documentation.
• Ensure secure handling of data and adherence to governance policies.

Required Skills & Experience

• 3-5 years' commercial experience developing with TypeScript and Node.js.
• Strong backend development experience building:
  • APIs
  • Integration services
  • Message consumers
  • Data processing applications
• Experience gathering requirements and working directly with business stakeholders.
• Strong problem‑solving and troubleshooting capabilities.
• Solid SQL knowledge and experience with messaging platforms or NoSQL technologies.
• Experience with automated testing and quality‑focused development practices.
• Knowledge of Docker, CI/CD pipelines, and cloud platforms (Azure preferred).
• Understanding of distributed systems concepts including:
  • Idempotency
  • Retry patterns
  • Event ordering
  • Eventual consistency
• Fluent English communication skills.

Desirable Experience

• Event‑Driven Architecture, Event Sourcing, CQRS, or Projection patterns.
• Azure Event Hubs, Kafka, or similar streaming technologies.
• Protobuf, gRPC, and schema versioning.
• Kubernetes and GitOps tooling such as ArgoCD.
• Clean Architecture, Hexagonal Architecture, and Dependency Injection.
• Experience within transport, logistics, rail, or other operationally intensive environments.
• Exposure to AI‑assisted software development tools.

Contract : Freelance/ B2B

Start date: ASAP

Duration : 6 months + extension

Location :Hybrid, 1 day per week onsite in either London or Brussels HQ

Rate: £400 - £500 per day