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SENIOR SOFTWARE ENGINEER
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COUNTRY
Europe
FORMAT
Remote
JOB POSTED
2 day(s) ago
Svitla Systems Inc. is looking for a Senior Software Engineer – API Gateway \& Tracking (API7/JS/Lua)for a full-time position (40 hours per week) in Europe. Our client is a software company providing a B2C ecommerce identity and marketing data platform.
Role Overview: The team is seeking a Senior Software Engineer to own and evolve our API gateway and tracking layer, with a strong focus on JavaScript-based event pipelines, pixel technologies, and Lua-powered gateway extensions using API7 / Apache APISIX.
This role is critical to ensuring accurate, low-latency site tracking, reliable event ingestion, and high-fidelity telemetry across browser, server, and API boundaries.
Occasional travel to Vienna is a must-have option.
For this role, the team is looking for people with experience in:
Pixel Tracking Systems (1st party, 3rd party).
Event sourcing, event batching, fault recovery \& backpressure.
High-loaded distributed systems.
Knowledge of NodeJS/Lua runtime internals, ability to optimize code for IO performance.
Observability, debugging, including remote debugging (browser plugins).
In-depth Web \& Security: HTTP/{1.1,2,3}, CORS, cookies, JWT, OAuth2, and others.
Cloud \& Infra Skills: AWS, GCP, Kubernetes, Docker, Terraform.
Requirements
5+ years of experience in platform, backend, or tracking-focused engineering roles.
Strong experience with JavaScript / Node.js in production systems.
Hands-on experience with API7 / Apache APISIX or similar gateways.
Lua experience for NGINX / OpenResty / APISIX plugin development.
Experience designing and operating pixel-based tracking systems.
Solid understanding of browser internals, HTTP, cookies, CORS, and security.
Familiarity with cloud-native infrastructure (AWS/GCP, Kubernetes).
Excellent spoken and written English.
NICE TO HAVE
Experience with CDPs, analytics platforms, or attribution systems.
Server-side tagging or GTM Server-Side experience.
Knowledge of privacy frameworks (consent, first-party data strategies).
OpenTelemetry or real-time streaming pipelines.
Responsibilities
Design and operate an API7 / Apache APISIX gateway layer for high-volume tracking and event ingestion.
Develop custom Lua plugins to: Capture, normalize, and enrich pixel and API events; Perform edge-side validation, filtering, and routing.
Build and maintain JavaScript / Node.js services that: Receive and process tracking events; Support pixel endpoints, event batching, and retries; Interface with downstream analytics and data platforms.
Instrument tracking pipelines with observability tooling (OpenTelemetry, Prometheus, Grafana, ELK, SumoLogic).
Ensure compliance and reliability across tracking infrastructure (latency, completeness, uptime).
Partner with product, data, and privacy teams to evolve tracking strategies.
Participate in on-call rotations, incident response, and postmortems.
Implement and maintain pixel-based tracking systems, including: First-party and third-party pixel architectures; Cookie and localStorage handling; Browser-to-server event flows.
WE OFFER
US and EU projects based on advanced technologies.
Competitive compensation based on skills and experience.
Regular performance appraisals to support your growth.
Flexibility in workspace, either remote or our welcoming office.
Bonuses for article writing, public talks, and other activities.
Generous time off, including vacation, national holidays, sick leaves, and family days.
Personalized learning programs tailored to your interests and skill development.
Free tech webinars and meetups organized by Svitla.
Regular corporate online activities.
Awesome team and a friendly, supportive community!
ABOUT SVITLA
Svitla Systems is a global digital solutions company headquartered in the U.S. and operating across the Americas, Europe, Asia, and APAC. Since 2003, we have served a wide range of clients — from innovative start-ups to Fortune 500 companies.
Our success is built on partnership. By integrating seamlessly with clients’ teams, we create lasting collaborations that drive real results.
We are strong advocates of workplace flexibility, remote culture, individual approach to professional and personal growth.
Svitla is proud to be an equal opportunity employer. All qualified applicants will receive consideration for cooperation without regard to age, gender identity, sexual orientation, religion, race, color, national origin, disability, or any other characteristic protected by applicable law.
Our global mission is to build a business that contributes to wellbeing of our partners, personnel, and their families, improves our communities, and makes a lasting difference in the world.
Together, we are coding a brighter tomorrow — and living it.
Join us!
LET'S MEET IN PERSON
TetianaKorchmenko
RECRUITER
Email:
t.korchmenko@svitla.com