Senior Software Engineer, Sinch
Cloud communications for businesses
Job no longer available
Cloud communications for businesses
1001+ employees
Job no longer available
1001+ employees
Company mission
To bring businesses and people closer through personalised engagement.
Role
Who you are
- This role requires someone who is comfortable operating in ambiguity, can drive technical decisions, and thrives in a team that ships with urgency while investing in system health
- Candidates should bring a knowledgeable and skilled approach to the use of AI in the software development process itself — we value a balanced, curious, and quality-driven use of AI tooling
- 5+ years of professional software engineering experience
- Strong proficiency in Node.js/TypeScript and/or Go
- Experience with real-time systems — WebSocket, event-driven architectures, or similar
- Solid understanding and hands-on experience with complex cloud infrastructure, ideally GCP and/or AWS
- Experience with microservices architecture and distributed systems, including state management across replicas (e.g. ETCD, Redis)
- Working knowledge of MongoDB or similar document databases
- Experience building and maintaining RESTful APIs and event-driven architectures (ideally Kafka specifically)
- Strong system design fundamentals — can reason about scalability, latency, failover, and trade-offs
- Excellent communication skills and comfort working in a distributed, cross-functional team (CET timezone alignment preferred)
Desirable
- Experience with conversational AI, chatbot or voicebot platforms, or NLP/NLU pipelines
- Experience with containerisation and orchestration (Docker, Kubernetes)
- Familiarity with identity management systems (OAuth/OIDC)
- Prior experience in a CPaaS, scale-up, or fast-growth product company
What the job involves
- We are looking for a Senior Software Engineer to help design, build, and scale Chatlayer’s conversational AI platform
- You will work across a real-time, distributed system that handles text and voice interactions at scale — including WebSocket infrastructure, bot engine integrations, and platform services
- We’re not looking for engineers who blindly generate code or who refuse to adopt new tools; we want people who apply AI judiciously, maintaining deep comprehension of what they build while leveraging these tools to move faster and think bigger
- Design and build backend services supporting Chatlayer’s text and voice channels, including WebSocket servers and real-time communication infrastructure
- Work on platform integrations and app-integration frameworks
- Contribute to architectural evolution — decoupling legacy dependencies and building more modular, vendor-agnostic systems
- Participate in technical decisions around identity management (SinchID), distributed events and data processing (MongoDB Atlas, Kafka, Temporal), and new platform capabilities
- Lead code reviews, technical discussions, and knowledge-sharing sessions within the team
- Mentor and be mentored by other engineers and contribute to a strong engineering culture rooted in the team’s values
- Support production systems through on-call rotations and incident response
- Invest in system health — improving test coverage, addressing technical debt, and continuously improving operational processes (Kaizen)
Application process
- Our corporate language is English; please submit your application in English
- We are committed to ensuring a recruitment process that is fair, objective, consistent, and inclusive
- Our approach includes structured, competency-based interviews designed to evaluate your skills, experience, and qualifications relevant to the role
- At times, we may include a data-driven assessment to enhance our hiring success and identify candidates likely to excel
- We believe in a two-way process and encourage you to ask questions throughout the journey
Our take
Over the course of well over a decade, Sinch has grown into an international service helping enterprise companies communicate with their customers over text, in-app video/voice messages, and other mobile channels. Used by Google, Tinder, Uber, and PayPal, among other marquee enterprise companies, most customers will have crossed paths with Sinch.
The company’s rise is due in part to an increased marketing focus on cultivating a highly personalised relationship between customer and brand. In part, too, it’s down to the surge in custom Sinch saw over recent years when more familiar channels of customer/brand communication went down. That seems to have settled now, but personalized messages, over text specifically, continues to play well among younger consumers.
It's going to prove a tough market to navigate going forward, though. Equally well-established competitors like Twilio, 8x8, and Link Mobility Group all have similar offerings. Sinch's foray into conversational AI will help them keep pace, as will their steady march of acquisitions, fundraising to fuel scaling efforts and partnerships with the likes of Salesforce.
Freddie
Company Specialist at Welcome to the Jungle
Insights
2% employee growth in 12 months
Company
Funding (2 rounds)
Mar 2017
$15.3m
LATE VC
Apr 2016
$1.1m
SEED
Total funding: $16.4m
Company HQ
Stadshagen, Stockholm, Stockholm County
Leadership
Laurinda Pang
(CEO)Previously President of Global Customer Success and International / Wholesale Markets at Lumen Technologies. Was also Chair of the ITW | Global Leaders' Forum and Independent Director at Acacia Communications.
Share this job
View 1 more job at Sinch