Javascript Developer M365 Office Add-ins (Microsoft 365)

Department: Editor
Track: Individual Contributor
Reports to: Editor Manager
Direct Reports: N/A

Location: Hybrid (Prague 6)
Schedule: 160h/month
Compensation: Competitive based on experience
Start Date: Flexible wed love you to join soon

About Us

Avvoka is a fast-growing legal technology scale-up specializing in document automation. Our platform helps law firms and in-house teams draft negotiate and manage contracts more efficiently. Were trusted by leading global brands from Magic Circle law firms like AO Shearman to global franchises like HBO. and have supported everything from billion-dollar transactions to international franchise deals.

Were growing quickly evolving from a bootstrapped start-up to scale-up with 60% growth in headcount and over 70% organic revenue growth in the past year - so come join us on building a culture thats innovative collaborative and inclusive.

Who You Are

Youre a technically strong JavaScript/TypeScript engineer who enjoys tackling hard engineering this role youll be creating M365 Add-ins optimising plugin performance improving real-time collaboration and shipping low-latency experiences that feel native inside Office apps. Youll join a cross-functional team (product design AI backend) to extend Avvoka into Microsoft 365 by building a high-quality Office Add-ins experience that complements our core web platform. Strong JavaScript/TypeScript skill is essential but any experience creating and developing Microsoft 365 Addi-ins is a bonus!

Key Responsibilities

1. Develop and Enhance Microsoft 365 Plugins

• Design develop and maintain high-quality Office Add-ins for Word Outlook and other M365 applications using JavaScript and TypeScript
• Implement secure and scalable integrations with Microsoft Graph API and other Office JS SDKs
• Ensure consistent user experiences between the plugin and the core web platform

2. Integrate AI-Powered Features

• Work closely with AI engineers to integrate intelligent suggestions content generation and automation features directly into the Microsoft plugin environment
• Implement API connections to internal and third-party AI services (e.g. OpenAI Azure Cognitive Services)
• Optimize performance for real-time context-aware AI interactions within Office documents

3. Write and Maintain Robust Scalable Code

• Deliver clean maintainable and testable TypeScript/JavaScript code aligned with modern standards
• Build for reliability performance and security within enterprise-grade environments
• Continuously improve code quality through refactoring testing and automation

4. Collaborate and Communicate

• Partner with product managers designers and AI engineers to define and deliver impactful plugin features
• Participate in technical discussions and contribute to architectural decisions for the plugin ecosystem
• Provide clear documentation technical insights and code reviews to ensure consistent engineering standards

5. Drive Innovation and Technical Excellence

• Stay current with advancements in Microsoft 365 development AI APIs and JavaScript frameworks
• Champion best practices in testing CI/CD and deployment for Office Add-ins
• Experiment with emerging AI/ML tools and evaluate their potential for enhancing user experience

Key Measures of Success

To ensure your application has the best opportunity of success your CV could cover the below measures of success with quantifiable results (e.g. percentages growth reductions impact)

• Plugin Performance: Delivered high-performing low-latency Microsoft 365 add-ins (Word Excel Outlook) that run seamlessly across desktop and web environments.
• AI Integration Impact: Successfully integrated AI features (e.g. Copilot OpenAI or Azure Cognitive Services) that improved user workflows or automation outcomes.
• Code Quality & Maintainability: Produced clean well-documented and testable JavaScript/TypeScript code that meets scalability and security standards.
• Collaboration & Delivery: Partnered effectively with product design and backend teams to deliver major feature releases on time and to spec.
• User Experience Outcomes: Enhanced the intuitiveness and responsiveness of plugin UIs driving measurable improvements in user adoption or engagement.

Person Specification

The ideal candidate would have:

• Strong proficiency in JavaScript and TypeScript (typically 5 years).
• Solid frontend experience with frameworks like React or .
• Experience building production web apps: RESTful APIs OAuth2 flows and secure authentication.
• Proven ability to debug and optimise complex UI performance issues.
• Comfortable working with product and design teams and owning end-to-end delivery.

The desirable candidate would have:

• Hands-on experience developing Office Add-ins using and integrating with Microsoft Graph.
• Familiarity with Azure OpenAI or Cognitive Services for AI integrations.
• Background in B2B SaaS or document automation platforms.
• Exposure to testing frameworks (Jest Playwright) and CI/CD for plugin deployment.
• Understanding of accessibility UX principles and UI performance optimisation.

In addition to the technical and professional skills there are certain core attributes we value across all roles:

• Adaptability in dynamically evolving settings
• A proactive solution-focused mindset with ownership
• A collaborative spirit supporting and mentoring others

If youre excited about this role but your experience doesnt align perfectly with every qualification we encourage you to apply anyway you might be just the candidate were looking for.

Our Hiring Process

• CV Review: Our People team reviews all applications carefully.
• Screening Call (15m): A quick virtual chat with our People team to learn more about you and answer any initial questions.
• Stage 1 Assessment Interview (3045m): A virtual assessment interview with the Hiring Manager focused on your experience and approach.

We aim to make an offer to the successful candidate within a month of application but this will vary by role and seniority.

Why Join Us

At Avvoka youll join a considerate innovative and inclusive team where every voice matters. Youll be instrumental in shaping our expansion into financial services - helping major institutions modernise how they handle legal and commercial documentation - while advancing your own career in enterprise SaaS sales.

Benefits

• Remote-first working policy employees are empowered to work from home and come into the office based on role and business requirements
• Home office IT allowance (eligibility criteria apply)
• Annual learning and development budget (eligibility criteria apply)
• Clear pathways for professional development and career growth
• Flexible dress code (role-based requirements apply)
• Right to request flexible working arrangements

Why Join Us

At Avvoka youll join a considerate innovative & inclusive team every voice matters and youll be empowered to make a real impact. With ample opportunities for professional development career progression and a range of employee benefits Avvoka is the place to grow your career while making a difference in the legal world.

Equal Opportunities

We are an equal opportunity employer that celebrates diversity committing to building an inclusive team that represents a variety of backgrounds.

We welcome applications from individuals of all backgrounds identities and experiences including those from underrepresented groups. Were also happy to provide accommodations for candidates with disabilities during the application process.