Software Engineer, Sinch
Anti-Abuse & Email Systems
More information about location
Cloud communications for businesses
Open for applications
Cloud communications for businesses
1001+ employees
Open for applications
More information about location
1001+ employees
Company mission
To bring businesses and people closer through personalised engagement.
Role
Who you are
- We believe you’re experienced, autonomous, and collaborative, comfortable navigating complex architectures to drive forward improvements with distributed teams across multiple time zones
- Proven practical backend development experience with Go
- Strong exposure to PHP, with the ability to apply it in practical applications
- Solid understanding of large-scale, high-availability systems and distributed architectures
- Strong experience with email infrastructure, anti-abuse, or reputation systems
- Experience analyzing traffic patterns and working with large volumes of behavioral or event data
- Proficiency with relational/NoSQL databases
- Excellent communicator with experience working in remote, cross-functional teams
- Strong sense of ownership, pragmatism, and security awareness
- Comfortable working autonomously and making decisions in a complex environment
Desirable
- Experience in email deliverability, anti-spam techniques, and authentication protocols (SPF, DKIM, DMARC)
- Knowledge of SMTP protocol and feedback loop integration
- Familiarity with compliance frameworks or regulatory environments (GDPR, CAN-SPAM, etc.)
- Experience with data pipelines or streaming tools (e.g., Kafka, Pub/Sub)
- Familiarity with observability tools (e.g., Prometheus, Grafana, ELK)
- Background in SaaS or large-scale messaging platforms
What the job involves
- We’re looking for a (Senior) Software Developer Engineer to join our Core Engineering team, with a focus on email reputation, deliverability, and anti-abuse systems
- You’ll play a key role in ensuring our platform stays a trusted space for legitimate communication by detecting, preventing, and mitigating abuse or fraudulent behavior
- In this role, you’ll work closely with our deliverability and compliance teams to design, build, and maintain systems that protect our platform and our users’ reputation
- You'll address critical issues related to sender reputation, regulatory compliance, and abuse prevention, while contributing to our CORE platform (sending pipeline and APIs)
- You’ll work on high-performance backend services in Go and PHP and contribute to systems that operate at massive scale and with high availability requirements
- His is a high-impact role where your decisions will directly influence platform integrity and customer trust
- Design, build, and maintain systems to monitor, score, and react to user behavior and sending patterns
- Partner with deliverability and compliance teams to translate business needs and develop mechanisms for abuse detection and mitigation
- Integrate with existing infrastructure and services, ensuring resilience, scalability, and performance
- Analyze production traffic, identify anomalies, and implement safeguards to protect platform reputation
- Shape architectural and technical decisions in a live, distributed, high-throughput environment
- Proactively contribute to discussions around data quality, scoring models, email authentication (SPF, DKIM, DMARC), and IP/domain reputation
- Respond to and learn from incidents related to abuse or reputation loss
- Contribute to Mailjet's sending pipeline development
- Maintain and evolve our public APIs
Application process
- Our corporate language is English, please submit your application in English
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
$15.2m
LATE VC
Apr 2016
$1.1m
SEED
Total funding: $16.3m
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.
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